Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6

* 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (741 commits)
  staging:iio:meter:ade7753 should be 16 bit read not 8 bit for mode register.
  staging:iio:kfifo_buf fix double initialization of the ring device structure.
  staging:iio:accel:lis3l02dq: fix incorrect pointer passed to spi_set_drvdata.
  staging:iio:imu fix missing register table index for some channels
  spectra: enable device before poking it
  staging: rts_pstor: Fix a miswriting
  staging/lirc_bt829: Return -ENODEV when no hardware is found.
  staging/lirc_parallel: remove pointless prototypes.
  staging/lirc_parallel: fix panic on rmmod
  staging:iio:adc:ad7476: Incorrect pointer into spi_set_drvdata.
  Staging: zram: Fix kunmapping order
  Revert "gma500: Fix dependencies"
  gma500: Add medfield header
  gma500: wire up the mrst i2c bus from chip_info
  gma500: Fix DPU build
  gma500: Clean up the DPU config and make it runtime
  gma500: resync with Medfield progress
  gma500: Use the mrst helpers and power control for mode commit
  gma500@ Fix backlight range error
  gma500: More Moorestown muddle meddling means MM maybe might modeset
  ...

Fix up fairly trivial conflicts all over, mostly due to header file
cleanup conflicts, but some deleted files and some just context changes:
 - Documentation/feature-removal-schedule.txt
 - drivers/staging/bcm/headers.h
 - drivers/staging/brcm80211/brcmfmac/dhd_linux.c
 - drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
 - drivers/staging/brcm80211/brcmfmac/wl_cfg80211.h
 - drivers/staging/brcm80211/brcmfmac/wl_iw.c
 - drivers/staging/et131x/et131x_netdev.c
 - drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c
 - drivers/staging/rtl8192e/r8192E.h
 - drivers/staging/usbip/userspace/src/utils.h

108 files changed, 3978 insertions, 3154 deletions

diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
index 21d2774..edbf470 100644
--- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
@@ -75,3 +75,11 @@ KernelVersion:	2.6.37
 Contact:	linux-iio@vger.kernel.org
 Description:
 		This property gets/sets the sensors ADC analog integration time.
+
+What:		/sys/bus/iio/devices/device[n]/illuminance0_calibscale
+KernelVersion:	2.6.37
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Hardware or software applied calibration scale factor assumed
+		to account for attenuation due to industrial design (glass
+		filters or aperture holes).
diff --git a/drivers/staging/iio/accel/adis16201.h b/drivers/staging/iio/accel/adis16201.h
index 4cc1a5b..dac5540 100644
--- a/drivers/staging/iio/accel/adis16201.h
+++ b/drivers/staging/iio/accel/adis16201.h
@@ -64,19 +64,17 @@
 /**
  * struct adis16201_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
  * @trig:		data ready trigger registered with iio
  * @tx:			transmit buffer
  * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct adis16201_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	struct iio_trigger		*trig;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct iio_trigger	*trig;
+	struct mutex		buf_lock;
+	u8			tx[14] ____cacheline_aligned;
+	u8			rx[14];
 };
 
 int adis16201_set_irq(struct iio_dev *indio_dev, bool enable);
diff --git a/drivers/staging/iio/accel/adis16201_core.c b/drivers/staging/iio/accel/adis16201_core.c
index e4c49f0..2fd01ae 100644
--- a/drivers/staging/iio/accel/adis16201_core.c
+++ b/drivers/staging/iio/accel/adis16201_core.c
@@ -24,8 +24,6 @@
 
 #include "adis16201.h"
 
-#define DRIVER_NAME		"adis16201"
-
 enum adis16201_chan {
 	in_supply,
 	temp,
@@ -42,13 +40,12 @@ enum adis16201_chan {
  * @reg_address: the address of the register to be written
  * @val: the value to write
  **/
-static int adis16201_spi_write_reg_8(struct device *dev,
+static int adis16201_spi_write_reg_8(struct iio_dev *indio_dev,
 		u8 reg_address,
 		u8 val)
 {
 	int ret;
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16201_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16201_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADIS16201_WRITE_REG(reg_address);
@@ -73,7 +70,7 @@ static int adis16201_spi_write_reg_16(struct iio_dev *indio_dev,
 {
 	int ret;
 	struct spi_message msg;
-	struct adis16201_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16201_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[] = {
 		{
 			.tx_buf = st->tx,
@@ -114,7 +111,7 @@ static int adis16201_spi_read_reg_16(struct iio_dev *indio_dev,
 		u16 *val)
 {
 	struct spi_message msg;
-	struct adis16201_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16201_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -151,14 +148,16 @@ error_ret:
 	return ret;
 }
 
-static int adis16201_reset(struct device *dev)
+static int adis16201_reset(struct iio_dev *indio_dev)
 {
 	int ret;
-	ret = adis16201_spi_write_reg_8(dev,
+	struct adis16201_state *st = iio_priv(indio_dev);
+
+	ret = adis16201_spi_write_reg_8(indio_dev,
 			ADIS16201_GLOB_CMD,
 			ADIS16201_GLOB_CMD_SW_RESET);
 	if (ret)
-		dev_err(dev, "problem resetting device");
+		dev_err(&st->us->dev, "problem resetting device");
 
 	return ret;
 }
@@ -167,15 +166,15 @@ static ssize_t adis16201_write_reset(struct device *dev,
 		struct device_attribute *attr,
 		const char *buf, size_t len)
 {
+	int ret;
+	bool res;
+
 	if (len < 1)
 		return -EINVAL;
-	switch (buf[0]) {
-	case '1':
-	case 'y':
-	case 'Y':
-		return adis16201_reset(dev);
-	}
-	return -EINVAL;
+	ret = strtobool(buf, &res);
+	if (ret || !res)
+		return ret;
+	return adis16201_reset(dev_get_drvdata(dev));
 }
 
 int adis16201_set_irq(struct iio_dev *indio_dev, bool enable)
@@ -245,41 +244,38 @@ err_ret:
 	return ret;
 }
 
-static int adis16201_initial_setup(struct adis16201_state *st)
+static int adis16201_initial_setup(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct device *dev = &st->indio_dev->dev;
+	struct device *dev = &indio_dev->dev;
 
 	/* Disable IRQ */
-	ret = adis16201_set_irq(st->indio_dev, false);
+	ret = adis16201_set_irq(indio_dev, false);
 	if (ret) {
 		dev_err(dev, "disable irq failed");
 		goto err_ret;
 	}
 
 	/* Do self test */
-	ret = adis16201_self_test(st->indio_dev);
+	ret = adis16201_self_test(indio_dev);
 	if (ret) {
 		dev_err(dev, "self test failure");
 		goto err_ret;
 	}
 
 	/* Read status register to check the result */
-	ret = adis16201_check_status(st->indio_dev);
+	ret = adis16201_check_status(indio_dev);
 	if (ret) {
-		adis16201_reset(dev);
+		adis16201_reset(indio_dev);
 		dev_err(dev, "device not playing ball -> reset");
 		msleep(ADIS16201_STARTUP_DELAY);
-		ret = adis16201_check_status(st->indio_dev);
+		ret = adis16201_check_status(indio_dev);
 		if (ret) {
 			dev_err(dev, "giving up");
 			goto err_ret;
 		}
 	}
 
-	printk(KERN_INFO DRIVER_NAME ": at CS%d (irq %d)\n",
-			st->us->chip_select, st->us->irq);
-
 err_ret:
 	return ret;
 }
@@ -309,13 +305,17 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
 		mutex_lock(&indio_dev->mlock);
 		addr = adis16201_addresses[chan->address][0];
 		ret = adis16201_spi_read_reg_16(indio_dev, addr, &val16);
-		if (ret)
+		if (ret) {
+			mutex_unlock(&indio_dev->mlock);
 			return ret;
+		}
 
 		if (val16 & ADIS16201_ERROR_ACTIVE) {
 			ret = adis16201_check_status(indio_dev);
-			if (ret)
+			if (ret) {
+				mutex_unlock(&indio_dev->mlock);
 				return ret;
+			}
 		}
 		val16 = val16 & ((1 << chan->scan_type.realbits) - 1);
 		if (chan->scan_type.sign == 's')
@@ -467,53 +467,40 @@ static const struct iio_info adis16201_info = {
 static int __devinit adis16201_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adis16201_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct adis16201_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADIS16201_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADIS16201_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
 
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16201_info;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16201_info;
 
-	st->indio_dev->channels = adis16201_channels;
-	st->indio_dev->num_channels = ARRAY_SIZE(adis16201_channels);
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = adis16201_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adis16201_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = adis16201_configure_ring(st->indio_dev);
+	ret = adis16201_configure_ring(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
 					  adis16201_channels,
 					  ARRAY_SIZE(adis16201_channels));
 	if (ret) {
@@ -522,50 +509,40 @@ static int __devinit adis16201_probe(struct spi_device *spi)
 	}
 
 	if (spi->irq) {
-		ret = adis16201_probe_trigger(st->indio_dev);
+		ret = adis16201_probe_trigger(indio_dev);
 		if (ret)
 			goto error_uninitialize_ring;
 	}
 
 	/* Get the device into a sane initial state */
-	ret = adis16201_initial_setup(st);
+	ret = adis16201_initial_setup(indio_dev);
 	if (ret)
 		goto error_remove_trigger;
 	return 0;
 
 error_remove_trigger:
-	adis16201_remove_trigger(st->indio_dev);
+	adis16201_remove_trigger(indio_dev);
 error_uninitialize_ring:
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 error_unreg_ring_funcs:
-	adis16201_unconfigure_ring(st->indio_dev);
+	adis16201_unconfigure_ring(indio_dev);
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int adis16201_remove(struct spi_device *spi)
 {
-	struct adis16201_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	adis16201_remove_trigger(indio_dev);
 	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16201_unconfigure_ring(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/accel/adis16201_ring.c b/drivers/staging/iio/accel/adis16201_ring.c
index c61f981..66e708d 100644
--- a/drivers/staging/iio/accel/adis16201_ring.c
+++ b/drivers/staging/iio/accel/adis16201_ring.c
@@ -23,7 +23,7 @@
 static int adis16201_read_ring_data(struct iio_dev *indio_dev, u8 *rx)
 {
 	struct spi_message msg;
-	struct adis16201_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16201_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[ADIS16201_OUTPUTS + 1];
 	int ret;
 	int i;
@@ -63,7 +63,7 @@ static irqreturn_t adis16201_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct adis16201_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16201_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 
 	int i = 0;
@@ -77,7 +77,7 @@ static irqreturn_t adis16201_trigger_handler(int irq, void *p)
 	}
 
 	if (ring->scan_count)
-		if (adis16201_read_ring_data(st->indio_dev, st->rx) >= 0)
+		if (adis16201_read_ring_data(indio_dev, st->rx) >= 0)
 			for (; i < ring->scan_count; i++)
 				data[i] = be16_to_cpup(
 					(__be16 *)&(st->rx[i*2]));
@@ -88,7 +88,7 @@ static irqreturn_t adis16201_trigger_handler(int irq, void *p)
 
 	ring->access->store_to(ring, (u8 *)data, pf->timestamp);
 
-	iio_trigger_notify_done(st->indio_dev->trig);
+	iio_trigger_notify_done(indio_dev->trig);
 	kfree(data);
 
 	return IRQ_HANDLED;
diff --git a/drivers/staging/iio/accel/adis16201_trigger.c b/drivers/staging/iio/accel/adis16201_trigger.c
index bea917e..3a95c08 100644
--- a/drivers/staging/iio/accel/adis16201_trigger.c
+++ b/drivers/staging/iio/accel/adis16201_trigger.c
@@ -17,17 +17,16 @@
 static int adis16201_data_rdy_trigger_set_state(struct iio_trigger *trig,
 						bool state)
 {
-	struct adis16201_state *st = trig->private_data;
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = trig->private_data;
 
 	dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
-	return adis16201_set_irq(st->indio_dev, state);
+	return adis16201_set_irq(indio_dev, state);
 }
 
 int adis16201_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct adis16201_state *st = indio_dev->dev_data;
+	struct adis16201_state *st = iio_priv(indio_dev);
 
 	st->trig = iio_allocate_trigger("adis16201-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
@@ -43,7 +42,7 @@ int adis16201_probe_trigger(struct iio_dev *indio_dev)
 		goto error_free_trig;
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->owner = THIS_MODULE;
-	st->trig->private_data = st;
+	st->trig->private_data = indio_dev;
 	st->trig->set_trigger_state = &adis16201_data_rdy_trigger_set_state;
 	ret = iio_trigger_register(st->trig);
 
@@ -64,7 +63,7 @@ error_ret:
 
 void adis16201_remove_trigger(struct iio_dev *indio_dev)
 {
-	struct adis16201_state *state = indio_dev->dev_data;
+	struct adis16201_state *state = iio_priv(indio_dev);
 
 	iio_trigger_unregister(state->trig);
 	free_irq(state->us->irq, state->trig);
diff --git a/drivers/staging/iio/accel/adis16203.h b/drivers/staging/iio/accel/adis16203.h
index 175e21b..4071bc0 100644
--- a/drivers/staging/iio/accel/adis16203.h
+++ b/drivers/staging/iio/accel/adis16203.h
@@ -59,19 +59,17 @@
 /**
  * struct adis16203_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
  * @trig:		data ready trigger registered with iio
  * @tx:			transmit buffer
  * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct adis16203_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	struct iio_trigger		*trig;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct iio_trigger	*trig;
+	struct mutex		buf_lock;
+	u8			tx[ADIS16203_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADIS16203_MAX_RX];
 };
 
 int adis16203_set_irq(struct iio_dev *indio_dev, bool enable);
diff --git a/drivers/staging/iio/accel/adis16203_core.c b/drivers/staging/iio/accel/adis16203_core.c
index 36be4d5..bf19888 100644
--- a/drivers/staging/iio/accel/adis16203_core.c
+++ b/drivers/staging/iio/accel/adis16203_core.c
@@ -36,7 +36,7 @@ static int adis16203_spi_write_reg_8(struct iio_dev *indio_dev,
 				     u8 val)
 {
 	int ret;
-	struct adis16203_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16203_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADIS16203_WRITE_REG(reg_address);
@@ -61,7 +61,7 @@ static int adis16203_spi_write_reg_16(struct iio_dev *indio_dev,
 {
 	int ret;
 	struct spi_message msg;
-	struct adis16203_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16203_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[] = {
 		{
 			.tx_buf = st->tx,
@@ -102,7 +102,7 @@ static int adis16203_spi_read_reg_16(struct iio_dev *indio_dev,
 		u16 *val)
 {
 	struct spi_message msg;
-	struct adis16203_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16203_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -418,51 +418,38 @@ static const struct iio_info adis16203_info = {
 static int __devinit adis16203_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adis16203_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
-		goto error_ret;
-	}
-	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	struct iio_dev *indio_dev;
+	struct adis16203_state *st;
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADIS16203_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADIS16203_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
-		goto error_free_rx;
+		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
+	/* this is only used for removal purposes */
+	spi_set_drvdata(spi, indio_dev);
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->channels = adis16203_channels;
-	st->indio_dev->num_channels = ARRAY_SIZE(adis16203_channels);
-	st->indio_dev->info = &adis16203_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
-
-	ret = adis16203_configure_ring(st->indio_dev);
+
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->channels = adis16203_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adis16203_channels);
+	indio_dev->info = &adis16203_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = adis16203_configure_ring(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
 					  adis16203_channels,
 					  ARRAY_SIZE(adis16203_channels));
 	if (ret) {
@@ -471,50 +458,40 @@ static int __devinit adis16203_probe(struct spi_device *spi)
 	}
 
 	if (spi->irq) {
-		ret = adis16203_probe_trigger(st->indio_dev);
+		ret = adis16203_probe_trigger(indio_dev);
 		if (ret)
 			goto error_uninitialize_ring;
 	}
 
 	/* Get the device into a sane initial state */
-	ret = adis16203_initial_setup(st->indio_dev);
+	ret = adis16203_initial_setup(indio_dev);
 	if (ret)
 		goto error_remove_trigger;
 	return 0;
 
 error_remove_trigger:
-	adis16203_remove_trigger(st->indio_dev);
+	adis16203_remove_trigger(indio_dev);
 error_uninitialize_ring:
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 error_unreg_ring_funcs:
-	adis16203_unconfigure_ring(st->indio_dev);
+	adis16203_unconfigure_ring(indio_dev);
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int adis16203_remove(struct spi_device *spi)
 {
-	struct adis16203_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	adis16203_remove_trigger(indio_dev);
 	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16203_unconfigure_ring(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/accel/adis16203_ring.c b/drivers/staging/iio/accel/adis16203_ring.c
index a9a789d..d2c07c5 100644
--- a/drivers/staging/iio/accel/adis16203_ring.c
+++ b/drivers/staging/iio/accel/adis16203_ring.c
@@ -26,7 +26,7 @@ static int adis16203_read_ring_data(struct device *dev, u8 *rx)
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16203_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16203_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[ADIS16203_OUTPUTS + 1];
 	int ret;
 	int i;
@@ -68,7 +68,7 @@ static irqreturn_t adis16203_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct adis16203_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16203_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 
 	int i = 0;
@@ -82,7 +82,7 @@ static irqreturn_t adis16203_trigger_handler(int irq, void *p)
 	}
 
 	if (ring->scan_count)
-		if (adis16203_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
+		if (adis16203_read_ring_data(&indio_dev->dev, st->rx) >= 0)
 			for (; i < ring->scan_count; i++)
 				data[i] = be16_to_cpup(
 					(__be16 *)&(st->rx[i*2]));
@@ -95,7 +95,7 @@ static irqreturn_t adis16203_trigger_handler(int irq, void *p)
 			      (u8 *)data,
 			      pf->timestamp);
 
-	iio_trigger_notify_done(st->indio_dev->trig);
+	iio_trigger_notify_done(indio_dev->trig);
 	kfree(data);
 
 	return IRQ_HANDLED;
diff --git a/drivers/staging/iio/accel/adis16203_trigger.c b/drivers/staging/iio/accel/adis16203_trigger.c
index ca5db17..3caf3e8 100644
--- a/drivers/staging/iio/accel/adis16203_trigger.c
+++ b/drivers/staging/iio/accel/adis16203_trigger.c
@@ -18,17 +18,16 @@
 static int adis16203_data_rdy_trigger_set_state(struct iio_trigger *trig,
 						bool state)
 {
-	struct adis16203_state *st = trig->private_data;
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = trig->private_data;
 
 	dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
-	return adis16203_set_irq(st->indio_dev, state);
+	return adis16203_set_irq(indio_dev, state);
 }
 
 int adis16203_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct adis16203_state *st = indio_dev->dev_data;
+	struct adis16203_state *st = iio_priv(indio_dev);
 
 	st->trig = iio_allocate_trigger("adis16203-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
@@ -46,7 +45,7 @@ int adis16203_probe_trigger(struct iio_dev *indio_dev)
 
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->owner = THIS_MODULE;
-	st->trig->private_data = st;
+	st->trig->private_data = indio_dev;
 	st->trig->set_trigger_state = &adis16203_data_rdy_trigger_set_state;
 	ret = iio_trigger_register(st->trig);
 
@@ -67,9 +66,9 @@ error_ret:
 
 void adis16203_remove_trigger(struct iio_dev *indio_dev)
 {
-	struct adis16203_state *state = indio_dev->dev_data;
+	struct adis16203_state *st = iio_priv(indio_dev);
 
-	iio_trigger_unregister(state->trig);
-	free_irq(state->us->irq, state->trig);
-	iio_free_trigger(state->trig);
+	iio_trigger_unregister(st->trig);
+	free_irq(st->us->irq, st->trig);
+	iio_free_trigger(st->trig);
 }
diff --git a/drivers/staging/iio/accel/adis16204.h b/drivers/staging/iio/accel/adis16204.h
index 1690c0d..3bb0490 100644
--- a/drivers/staging/iio/accel/adis16204.h
+++ b/drivers/staging/iio/accel/adis16204.h
@@ -67,19 +67,17 @@
 /**
  * struct adis16204_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
  * @trig:		data ready trigger registered with iio
  * @tx:			transmit buffer
  * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct adis16204_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	struct iio_trigger		*trig;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct iio_trigger	*trig;
+	struct mutex		buf_lock;
+	u8			tx[ADIS16204_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADIS16204_MAX_RX];
 };
 
 int adis16204_set_irq(struct iio_dev *indio_dev, bool enable);
diff --git a/drivers/staging/iio/accel/adis16204_core.c b/drivers/staging/iio/accel/adis16204_core.c
index 1680670..cfd09b3 100644
--- a/drivers/staging/iio/accel/adis16204_core.c
+++ b/drivers/staging/iio/accel/adis16204_core.c
@@ -39,7 +39,7 @@ static int adis16204_spi_write_reg_8(struct iio_dev *indio_dev,
 		u8 val)
 {
 	int ret;
-	struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16204_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADIS16204_WRITE_REG(reg_address);
@@ -64,7 +64,7 @@ static int adis16204_spi_write_reg_16(struct iio_dev *indio_dev,
 {
 	int ret;
 	struct spi_message msg;
-	struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16204_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[] = {
 		{
 			.tx_buf = st->tx,
@@ -106,7 +106,7 @@ static int adis16204_spi_read_reg_16(struct iio_dev *indio_dev,
 				     u16 *val)
 {
 	struct spi_message msg;
-	struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16204_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -483,52 +483,38 @@ static const struct iio_info adis16204_info = {
 static int __devinit adis16204_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adis16204_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
-		goto error_ret;
-	}
-	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	struct adis16204_state *st;
+	struct iio_dev *indio_dev;
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADIS16204_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADIS16204_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
-		goto error_free_rx;
+		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
+	/* this is only used for removal purposes */
+	spi_set_drvdata(spi, indio_dev);
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
 
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16204_info;
-	st->indio_dev->channels = adis16204_channels;
-	st->indio_dev->num_channels = ARRAY_SIZE(adis16204_channels);
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16204_info;
+	indio_dev->channels = adis16204_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adis16204_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = adis16204_configure_ring(st->indio_dev);
+	ret = adis16204_configure_ring(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
 					  adis16204_channels,
 					  ARRAY_SIZE(adis16204_channels));
 	if (ret) {
@@ -537,50 +523,40 @@ static int __devinit adis16204_probe(struct spi_device *spi)
 	}
 
 	if (spi->irq) {
-		ret = adis16204_probe_trigger(st->indio_dev);
+		ret = adis16204_probe_trigger(indio_dev);
 		if (ret)
 			goto error_uninitialize_ring;
 	}
 
 	/* Get the device into a sane initial state */
-	ret = adis16204_initial_setup(st->indio_dev);
+	ret = adis16204_initial_setup(indio_dev);
 	if (ret)
 		goto error_remove_trigger;
 	return 0;
 
 error_remove_trigger:
-	adis16204_remove_trigger(st->indio_dev);
+	adis16204_remove_trigger(indio_dev);
 error_uninitialize_ring:
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 error_unreg_ring_funcs:
-	adis16204_unconfigure_ring(st->indio_dev);
+	adis16204_unconfigure_ring(indio_dev);
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int adis16204_remove(struct spi_device *spi)
 {
-	struct adis16204_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	adis16204_remove_trigger(indio_dev);
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16204_unconfigure_ring(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/accel/adis16204_ring.c b/drivers/staging/iio/accel/adis16204_ring.c
index a2d36fb..852df06 100644
--- a/drivers/staging/iio/accel/adis16204_ring.c
+++ b/drivers/staging/iio/accel/adis16204_ring.c
@@ -26,7 +26,7 @@ static int adis16204_read_ring_data(struct device *dev, u8 *rx)
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16204_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[ADIS16204_OUTPUTS + 1];
 	int ret;
 	int i;
@@ -66,7 +66,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16204_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 	int i = 0;
 	s16 *data;
@@ -79,7 +79,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
 	}
 
 	if (ring->scan_count)
-		if (adis16204_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
+		if (adis16204_read_ring_data(&indio_dev->dev, st->rx) >= 0)
 			for (; i < ring->scan_count; i++)
 				data[i] = be16_to_cpup(
 					(__be16 *)&(st->rx[i*2]));
@@ -90,7 +90,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
 
 	ring->access->store_to(ring, (u8 *)data, pf->timestamp);
 
-	iio_trigger_notify_done(st->indio_dev->trig);
+	iio_trigger_notify_done(indio_dev->trig);
 	kfree(data);
 
 	return IRQ_HANDLED;
diff --git a/drivers/staging/iio/accel/adis16204_trigger.c b/drivers/staging/iio/accel/adis16204_trigger.c
index 5e1f9ae..01f73b9 100644
--- a/drivers/staging/iio/accel/adis16204_trigger.c
+++ b/drivers/staging/iio/accel/adis16204_trigger.c
@@ -18,17 +18,16 @@
 static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig,
 						bool state)
 {
-	struct adis16204_state *st = trig->private_data;
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = trig->private_data;
 
 	dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
-	return adis16204_set_irq(st->indio_dev, state);
+	return adis16204_set_irq(indio_dev, state);
 }
 
 int adis16204_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct adis16204_state *st = indio_dev->dev_data;
+	struct adis16204_state *st = iio_priv(indio_dev);
 
 	st->trig = iio_allocate_trigger("adis16204-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
@@ -46,7 +45,7 @@ int adis16204_probe_trigger(struct iio_dev *indio_dev)
 
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->owner = THIS_MODULE;
-	st->trig->private_data = st;
+	st->trig->private_data = indio_dev;
 	st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state;
 	ret = iio_trigger_register(st->trig);
 
@@ -67,7 +66,7 @@ error_ret:
 
 void adis16204_remove_trigger(struct iio_dev *indio_dev)
 {
-	struct adis16204_state *state = indio_dev->dev_data;
+	struct adis16204_state *state = iio_priv(indio_dev);
 
 	iio_trigger_unregister(state->trig);
 	free_irq(state->us->irq, state->trig);
diff --git a/drivers/staging/iio/accel/adis16209.h b/drivers/staging/iio/accel/adis16209.h
index 3153cbe..c8b7b00 100644
--- a/drivers/staging/iio/accel/adis16209.h
+++ b/drivers/staging/iio/accel/adis16209.h
@@ -104,19 +104,17 @@
 /**
  * struct adis16209_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
  * @trig:		data ready trigger registered with iio
  * @tx:			transmit buffer
  * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct adis16209_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	struct iio_trigger		*trig;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct iio_trigger	*trig;
+	struct mutex		buf_lock;
+	u8			tx[ADIS16209_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADIS16209_MAX_RX];
 };
 
 int adis16209_set_irq(struct iio_dev *indio_dev, bool enable);
diff --git a/drivers/staging/iio/accel/adis16209_core.c b/drivers/staging/iio/accel/adis16209_core.c
index c423cc9..55f3a7b 100644
--- a/drivers/staging/iio/accel/adis16209_core.c
+++ b/drivers/staging/iio/accel/adis16209_core.c
@@ -37,7 +37,7 @@ static int adis16209_spi_write_reg_8(struct iio_dev *indio_dev,
 				     u8 val)
 {
 	int ret;
-	struct adis16209_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16209_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADIS16209_WRITE_REG(reg_address);
@@ -62,7 +62,7 @@ static int adis16209_spi_write_reg_16(struct iio_dev *indio_dev,
 {
 	int ret;
 	struct spi_message msg;
-	struct adis16209_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16209_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[] = {
 		{
 			.tx_buf = st->tx,
@@ -105,7 +105,7 @@ static int adis16209_spi_read_reg_16(struct iio_dev *indio_dev,
 				     u16 *val)
 {
 	struct spi_message msg;
-	struct adis16209_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16209_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -466,52 +466,38 @@ static const struct iio_info adis16209_info = {
 static int __devinit adis16209_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adis16209_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
-		goto error_ret;
-	}
-	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	struct adis16209_state *st;
+	struct iio_dev *indio_dev;
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADIS16209_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADIS16209_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
-		goto error_free_rx;
+		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
+	/* this is only used for removal purposes */
+	spi_set_drvdata(spi, indio_dev);
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
 
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16209_info;
-	st->indio_dev->channels = adis16209_channels;
-	st->indio_dev->num_channels = ARRAY_SIZE(adis16209_channels);
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16209_info;
+	indio_dev->channels = adis16209_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adis16209_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = adis16209_configure_ring(st->indio_dev);
+	ret = adis16209_configure_ring(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
 					  adis16209_channels,
 					  ARRAY_SIZE(adis16209_channels));
 	if (ret) {
@@ -520,42 +506,35 @@ static int __devinit adis16209_probe(struct spi_device *spi)
 	}
 
 	if (spi->irq) {
-		ret = adis16209_probe_trigger(st->indio_dev);
+		ret = adis16209_probe_trigger(indio_dev);
 		if (ret)
 			goto error_uninitialize_ring;
 	}
 
 	/* Get the device into a sane initial state */
-	ret = adis16209_initial_setup(st->indio_dev);
+	ret = adis16209_initial_setup(indio_dev);
 	if (ret)
 		goto error_remove_trigger;
 	return 0;
 
 error_remove_trigger:
-	adis16209_remove_trigger(st->indio_dev);
+	adis16209_remove_trigger(indio_dev);
 error_uninitialize_ring:
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 error_unreg_ring_funcs:
-	adis16209_unconfigure_ring(st->indio_dev);
+	adis16209_unconfigure_ring(indio_dev);
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int adis16209_remove(struct spi_device *spi)
 {
-	struct adis16209_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	flush_scheduled_work();
 
@@ -563,9 +542,6 @@ static int adis16209_remove(struct spi_device *spi)
 	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16209_unconfigure_ring(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/accel/adis16209_ring.c b/drivers/staging/iio/accel/adis16209_ring.c
index 390908b..45017d3 100644
--- a/drivers/staging/iio/accel/adis16209_ring.c
+++ b/drivers/staging/iio/accel/adis16209_ring.c
@@ -26,7 +26,7 @@ static int adis16209_read_ring_data(struct device *dev, u8 *rx)
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16209_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16209_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[ADIS16209_OUTPUTS + 1];
 	int ret;
 	int i;
@@ -66,7 +66,7 @@ static irqreturn_t adis16209_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct adis16209_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16209_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 
 	int i = 0;
@@ -80,7 +80,7 @@ static irqreturn_t adis16209_trigger_handler(int irq, void *p)
 	}
 
 	if (ring->scan_count &&
-	    adis16209_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
+	    adis16209_read_ring_data(&indio_dev->dev, st->rx) >= 0)
 		for (; i < ring->scan_count; i++)
 			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
@@ -90,7 +90,7 @@ static irqreturn_t adis16209_trigger_handler(int irq, void *p)
 
 	ring->access->store_to(ring, (u8 *)data, pf->timestamp);
 
-	iio_trigger_notify_done(st->indio_dev->trig);
+	iio_trigger_notify_done(indio_dev->trig);
 	kfree(data);
 
 	return IRQ_HANDLED;
diff --git a/drivers/staging/iio/accel/adis16209_trigger.c b/drivers/staging/iio/accel/adis16209_trigger.c
index 211ee70..6df7b47 100644
--- a/drivers/staging/iio/accel/adis16209_trigger.c
+++ b/drivers/staging/iio/accel/adis16209_trigger.c
@@ -27,17 +27,16 @@ static irqreturn_t adis16209_data_rdy_trig_poll(int irq, void *trig)
 static int adis16209_data_rdy_trigger_set_state(struct iio_trigger *trig,
 						bool state)
 {
-	struct adis16209_state *st = trig->private_data;
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = trig->private_data;
 
 	dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
-	return adis16209_set_irq(st->indio_dev, state);
+	return adis16209_set_irq(indio_dev, state);
 }
 
 int adis16209_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct adis16209_state *st = indio_dev->dev_data;
+	struct adis16209_state *st = iio_priv(indio_dev);
 
 	st->trig = iio_allocate_trigger("adis16209-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
@@ -54,7 +53,7 @@ int adis16209_probe_trigger(struct iio_dev *indio_dev)
 		goto error_free_trig;
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->owner = THIS_MODULE;
-	st->trig->private_data = st;
+	st->trig->private_data = indio_dev;
 	st->trig->set_trigger_state = &adis16209_data_rdy_trigger_set_state;
 	ret = iio_trigger_register(st->trig);
 
@@ -75,9 +74,9 @@ error_ret:
 
 void adis16209_remove_trigger(struct iio_dev *indio_dev)
 {
-	struct adis16209_state *state = indio_dev->dev_data;
+	struct adis16209_state *st = iio_priv(indio_dev);
 
-	iio_trigger_unregister(state->trig);
-	free_irq(state->us->irq, state->trig);
-	iio_free_trigger(state->trig);
+	iio_trigger_unregister(st->trig);
+	free_irq(st->us->irq, st->trig);
+	iio_free_trigger(st->trig);
 }
diff --git a/drivers/staging/iio/accel/adis16220.h b/drivers/staging/iio/accel/adis16220.h
index 4d5758c..024313c 100644
--- a/drivers/staging/iio/accel/adis16220.h
+++ b/drivers/staging/iio/accel/adis16220.h
@@ -126,21 +126,15 @@
 /**
  * struct adis16220_state - device instance specific data
  * @us:			actual spi_device
- * @work_trigger_to_ring: bh for triggered event handling
- * @inter:		used to check if new interrupt has been triggered
- * @last_timestamp:	passing timestamp from th to bh of interrupt handler
- * @indio_dev:		industrial I/O device structure
- * @trig:		data ready trigger registered with iio
  * @tx:			transmit buffer
  * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct adis16220_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct mutex		buf_lock;
+	u8			tx[ADIS16220_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADIS16220_MAX_RX];
 };
 
 #endif /* SPI_ADIS16220_H_ */
diff --git a/drivers/staging/iio/accel/adis16220_core.c b/drivers/staging/iio/accel/adis16220_core.c
index 605a75e..bf9ba07 100644
--- a/drivers/staging/iio/accel/adis16220_core.c
+++ b/drivers/staging/iio/accel/adis16220_core.c
@@ -39,7 +39,7 @@ static int adis16220_spi_write_reg_8(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16220_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADIS16220_WRITE_REG(reg_address);
@@ -65,7 +65,7 @@ static int adis16220_spi_write_reg_16(struct device *dev,
 	int ret;
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16220_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[] = {
 		{
 			.tx_buf = st->tx,
@@ -110,7 +110,7 @@ static int adis16220_spi_read_reg_16(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16220_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -316,10 +316,10 @@ err_ret:
 	return ret;
 }
 
-static int adis16220_initial_setup(struct adis16220_state *st)
+static int adis16220_initial_setup(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct device *dev = &st->indio_dev->dev;
+	struct device *dev = &indio_dev->dev;
 
 	/* Do self test */
 	ret = adis16220_self_test(dev);
@@ -341,19 +341,17 @@ static int adis16220_initial_setup(struct adis16220_state *st)
 		}
 	}
 
-	printk(KERN_INFO DRIVER_NAME ": at CS%d (irq %d)\n",
-			st->us->chip_select, st->us->irq);
-
 err_ret:
 	return ret;
 }
 
-static ssize_t adis16220_capture_buffer_read(struct adis16220_state *st,
+static ssize_t adis16220_capture_buffer_read(struct iio_dev *indio_dev,
 					char *buf,
 					loff_t off,
 					size_t count,
 					int addr)
 {
+	struct adis16220_state *st = iio_priv(indio_dev);
 	struct spi_message msg;
 	struct spi_transfer xfers[] = {
 		{
@@ -383,7 +381,7 @@ static ssize_t adis16220_capture_buffer_read(struct adis16220_state *st,
 		count = ADIS16220_CAPTURE_SIZE - off;
 
 	/* write the begin position of capture buffer */
-	ret = adis16220_spi_write_reg_16(&st->indio_dev->dev,
+	ret = adis16220_spi_write_reg_16(&indio_dev->dev,
 					ADIS16220_CAPT_PNTR,
 					off > 1);
 	if (ret)
@@ -422,9 +420,8 @@ static ssize_t adis16220_accel_bin_read(struct file *filp, struct kobject *kobj,
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
 
-	return adis16220_capture_buffer_read(st, buf,
+	return adis16220_capture_buffer_read(indio_dev, buf,
 					off, count,
 					ADIS16220_CAPT_BUFA);
 }
@@ -445,9 +442,8 @@ static ssize_t adis16220_adc1_bin_read(struct file *filp, struct kobject *kobj,
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
 
-	return adis16220_capture_buffer_read(st, buf,
+	return adis16220_capture_buffer_read(indio_dev, buf,
 					off, count,
 					ADIS16220_CAPT_BUF1);
 }
@@ -468,9 +464,8 @@ static ssize_t adis16220_adc2_bin_read(struct file *filp, struct kobject *kobj,
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
 
-	return adis16220_capture_buffer_read(st, buf,
+	return adis16220_capture_buffer_read(indio_dev, buf,
 					off, count,
 					ADIS16220_CAPT_BUF2);
 }
@@ -551,98 +546,76 @@ static const struct iio_info adis16220_info = {
 static int __devinit adis16220_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adis16220_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct adis16220_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
+
+	st = iio_priv(indio_dev);
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADIS16220_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADIS16220_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
 
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16220_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16220_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	regdone = 1;
 
-	ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &accel_bin);
+	ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &accel_bin);
 	if (ret)
 		goto error_free_dev;
 
-	ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &adc1_bin);
+	ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc1_bin);
 	if (ret)
 		goto error_rm_accel_bin;
 
-	ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &adc2_bin);
+	ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc2_bin);
 	if (ret)
 		goto error_rm_adc1_bin;
 
 	/* Get the device into a sane initial state */
-	ret = adis16220_initial_setup(st);
+	ret = adis16220_initial_setup(indio_dev);
 	if (ret)
 		goto error_rm_adc2_bin;
 	return 0;
 
 error_rm_adc2_bin:
-	sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &adc2_bin);
+	sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin);
 error_rm_adc1_bin:
-	sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &adc1_bin);
+	sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin);
 error_rm_accel_bin:
-	sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &accel_bin);
+	sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin);
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int adis16220_remove(struct spi_device *spi)
 {
-	struct adis16220_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	flush_scheduled_work();
 
-	sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &adc2_bin);
-	sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &adc1_bin);
-	sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &accel_bin);
+	sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin);
+	sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin);
+	sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin);
 	iio_device_unregister(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/accel/adis16240.h b/drivers/staging/iio/accel/adis16240.h
index 162b1f4..f1dd047 100644
--- a/drivers/staging/iio/accel/adis16240.h
+++ b/drivers/staging/iio/accel/adis16240.h
@@ -126,24 +126,21 @@
 /**
  * struct adis16240_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
  * @trig:		data ready trigger registered with iio
  * @tx:			transmit buffer
  * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct adis16240_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	struct iio_trigger		*trig;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct iio_trigger	*trig;
+	struct mutex		buf_lock;
+	u8			tx[ADIS16240_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADIS16240_MAX_RX];
 };
 
 int adis16240_set_irq(struct iio_dev *indio_dev, bool enable);
 
-#ifdef CONFIG_IIO_RING_BUFFER
 /* At the moment triggers are only used for ring buffer
  * filling. This may change!
  */
@@ -155,6 +152,7 @@ int adis16240_set_irq(struct iio_dev *indio_dev, bool enable);
 #define ADIS16240_SCAN_AUX_ADC	4
 #define ADIS16240_SCAN_TEMP	5
 
+#ifdef CONFIG_IIO_RING_BUFFER
 void adis16240_remove_trigger(struct iio_dev *indio_dev);
 int adis16240_probe_trigger(struct iio_dev *indio_dev);
 
diff --git a/drivers/staging/iio/accel/adis16240_core.c b/drivers/staging/iio/accel/adis16240_core.c
index ac60385..4a4eafc 100644
--- a/drivers/staging/iio/accel/adis16240_core.c
+++ b/drivers/staging/iio/accel/adis16240_core.c
@@ -41,7 +41,7 @@ static int adis16240_spi_write_reg_8(struct iio_dev *indio_dev,
 				     u8 val)
 {
 	int ret;
-	struct adis16240_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16240_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADIS16240_WRITE_REG(reg_address);
@@ -66,7 +66,7 @@ static int adis16240_spi_write_reg_16(struct iio_dev *indio_dev,
 {
 	int ret;
 	struct spi_message msg;
-	struct adis16240_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16240_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[] = {
 		{
 			.tx_buf = st->tx,
@@ -109,7 +109,7 @@ static int adis16240_spi_read_reg_16(struct iio_dev *indio_dev,
 		u16 *val)
 {
 	struct spi_message msg;
-	struct adis16240_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16240_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -517,52 +517,39 @@ static const struct iio_info adis16240_info = {
 static int __devinit adis16240_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adis16240_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct adis16240_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADIS16240_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADIS16240_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
 
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16240_info;
-	st->indio_dev->channels = adis16240_channels;
-	st->indio_dev->num_channels = ARRAY_SIZE(adis16240_channels);
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16240_info;
+	indio_dev->channels = adis16240_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adis16240_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = adis16240_configure_ring(st->indio_dev);
+	ret = adis16240_configure_ring(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
 					  adis16240_channels,
 					  ARRAY_SIZE(adis16240_channels));
 	if (ret) {
@@ -571,42 +558,36 @@ static int __devinit adis16240_probe(struct spi_device *spi)
 	}
 
 	if (spi->irq) {
-		ret = adis16240_probe_trigger(st->indio_dev);
+		ret = adis16240_probe_trigger(indio_dev);
 		if (ret)
 			goto error_uninitialize_ring;
 	}
 
 	/* Get the device into a sane initial state */
-	ret = adis16240_initial_setup(st->indio_dev);
+	ret = adis16240_initial_setup(indio_dev);
 	if (ret)
 		goto error_remove_trigger;
 	return 0;
 
 error_remove_trigger:
-	adis16240_remove_trigger(st->indio_dev);
+	adis16240_remove_trigger(indio_dev);
 error_uninitialize_ring:
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 error_unreg_ring_funcs:
-	adis16240_unconfigure_ring(st->indio_dev);
+	adis16240_unconfigure_ring(indio_dev);
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int adis16240_remove(struct spi_device *spi)
 {
-	struct adis16240_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	flush_scheduled_work();
 
@@ -614,9 +595,6 @@ static int adis16240_remove(struct spi_device *spi)
 	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16240_unconfigure_ring(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/accel/adis16240_ring.c b/drivers/staging/iio/accel/adis16240_ring.c
index 0c6d781..c812a34 100644
--- a/drivers/staging/iio/accel/adis16240_ring.c
+++ b/drivers/staging/iio/accel/adis16240_ring.c
@@ -26,7 +26,7 @@ static int adis16240_read_ring_data(struct device *dev, u8 *rx)
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16240_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16240_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[ADIS16240_OUTPUTS + 1];
 	int ret;
 	int i;
@@ -63,7 +63,7 @@ static irqreturn_t adis16240_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct adis16240_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16240_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 
 	int i = 0;
@@ -77,7 +77,7 @@ static irqreturn_t adis16240_trigger_handler(int irq, void *p)
 	}
 
 	if (ring->scan_count &&
-	    adis16240_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
+	    adis16240_read_ring_data(&indio_dev->dev, st->rx) >= 0)
 		for (; i < ring->scan_count; i++)
 			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
@@ -87,7 +87,7 @@ static irqreturn_t adis16240_trigger_handler(int irq, void *p)
 
 	ring->access->store_to(ring, (u8 *)data, pf->timestamp);
 
-	iio_trigger_notify_done(st->indio_dev->trig);
+	iio_trigger_notify_done(indio_dev->trig);
 	kfree(data);
 
 	return IRQ_HANDLED;
diff --git a/drivers/staging/iio/accel/adis16240_trigger.c b/drivers/staging/iio/accel/adis16240_trigger.c
index ece3ca8..17135fc3 100644
--- a/drivers/staging/iio/accel/adis16240_trigger.c
+++ b/drivers/staging/iio/accel/adis16240_trigger.c
@@ -27,17 +27,16 @@ static irqreturn_t adis16240_data_rdy_trig_poll(int irq, void *trig)
 static int adis16240_data_rdy_trigger_set_state(struct iio_trigger *trig,
 						bool state)
 {
-	struct adis16240_state *st = trig->private_data;
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = trig->private_data;
 
 	dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
-	return adis16240_set_irq(st->indio_dev, state);
+	return adis16240_set_irq(indio_dev, state);
 }
 
 int adis16240_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct adis16240_state *st = indio_dev->dev_data;
+	struct adis16240_state *st = iio_priv(indio_dev);
 
 	st->trig = iio_allocate_trigger("adis16240-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
@@ -55,7 +54,7 @@ int adis16240_probe_trigger(struct iio_dev *indio_dev)
 
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->owner = THIS_MODULE;
-	st->trig->private_data = st;
+	st->trig->private_data = indio_dev;
 	st->trig->set_trigger_state = &adis16240_data_rdy_trigger_set_state;
 	ret = iio_trigger_register(st->trig);
 
@@ -76,9 +75,9 @@ error_ret:
 
 void adis16240_remove_trigger(struct iio_dev *indio_dev)
 {
-	struct adis16240_state *state = indio_dev->dev_data;
+	struct adis16240_state *st = iio_priv(indio_dev);
 
-	iio_trigger_unregister(state->trig);
-	free_irq(state->us->irq, state->trig);
-	iio_free_trigger(state->trig);
+	iio_trigger_unregister(st->trig);
+	free_irq(st->us->irq, st->trig);
+	iio_free_trigger(st->trig);
 }
diff --git a/drivers/staging/iio/accel/kxsd9.c b/drivers/staging/iio/accel/kxsd9.c
index 973156e..c8a358a 100644
--- a/drivers/staging/iio/accel/kxsd9.c
+++ b/drivers/staging/iio/accel/kxsd9.c
@@ -56,17 +56,15 @@
 /**
  * struct kxsd9_state - device related storage
  * @buf_lock:	protect the rx and tx buffers.
- * @indio_dev:	associated industrial IO device
  * @us:		spi device
  * @rx:		single rx buffer storage
  * @tx:		single tx buffer storage
  **/
 struct kxsd9_state {
 	struct mutex buf_lock;
-	struct iio_dev *indio_dev;
 	struct spi_device *us;
-	u8 *rx;
-	u8 *tx;
+	u8 rx[KXSD9_STATE_RX_SIZE] ____cacheline_aligned;
+	u8 tx[KXSD9_STATE_TX_SIZE];
 };
 
 /* This may want to move to mili g to allow for non integer ranges */
@@ -77,7 +75,7 @@ static ssize_t kxsd9_read_scale(struct device *dev,
 	int ret;
 	ssize_t len = 0;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct kxsd9_state *st = indio_dev->dev_data;
+	struct kxsd9_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfer = {
 		.bits_per_word = 8,
 		.len = 2,
@@ -125,7 +123,7 @@ static ssize_t kxsd9_write_scale(struct device *dev,
 	struct spi_message msg;
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct kxsd9_state *st = indio_dev->dev_data;
+	struct kxsd9_state *st = iio_priv(indio_dev);
 	u8 val;
 	struct spi_transfer xfers[] = {
 		{
@@ -190,7 +188,7 @@ static ssize_t kxsd9_read_accel(struct device *dev,
 	u16 val;
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct kxsd9_state *st = indio_dev->dev_data;
+	struct kxsd9_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[] = {
 		{
 			.bits_per_word = 8,
@@ -253,52 +251,32 @@ static const struct attribute_group kxsd9_attribute_group = {
 	.attrs = kxsd9_attributes,
 };
 
-static int __devinit kxsd9_power_up(struct spi_device *spi)
+static int __devinit kxsd9_power_up(struct kxsd9_state *st)
 {
-	int ret;
 	struct spi_transfer xfers[2] = {
 		{
 			.bits_per_word = 8,
 			.len = 2,
 			.cs_change = 1,
+			.tx_buf = st->tx,
 		}, {
 			.bits_per_word = 8,
 			.len = 2,
 			.cs_change = 1,
+			.tx_buf = st->tx + 2,
 		},
 	};
 	struct spi_message msg;
-	u8 *tx2;
-	u8 *tx = kmalloc(2, GFP_KERNEL);
-
-	if (tx == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	tx2 = kmalloc(2, GFP_KERNEL);
-	if (tx2 == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
-	tx[0] = 0x0d;
-	tx[1] = 0x40;
+	st->tx[0] = 0x0d;
+	st->tx[1] = 0x40;
+	st->tx[2] = 0x0c;
+	st->tx[3] = 0x9b;
 
-	tx2[0] = 0x0c;
-	tx2[1] = 0x9b;
-
-	xfers[0].tx_buf = tx;
-	xfers[1].tx_buf = tx2;
 	spi_message_init(&msg);
 	spi_message_add_tail(&xfers[0], &msg);
 	spi_message_add_tail(&xfers[1], &msg);
-	ret = spi_sync(spi, &msg);
-
-	kfree(tx2);
-error_free_tx:
-	kfree(tx);
-error_ret:
-	return ret;
 
+	return spi_sync(st->us, &msg);
 };
 
 static const struct iio_info kxsd9_info = {
@@ -308,72 +286,44 @@ static const struct iio_info kxsd9_info = {
 
 static int __devinit kxsd9_probe(struct spi_device *spi)
 {
-
+	struct iio_dev *indio_dev;
 	struct kxsd9_state *st;
 	int ret = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
-
-	st->rx = kmalloc(sizeof(*st->rx)*KXSD9_STATE_RX_SIZE,
-			 GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kmalloc(sizeof(*st->tx)*KXSD9_STATE_TX_SIZE,
-			 GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
 
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &kxsd9_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &kxsd9_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
 	spi->mode = SPI_MODE_0;
 	spi_setup(spi);
-	kxsd9_power_up(spi);
+	kxsd9_power_up(st);
 
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+	iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int __devexit kxsd9_remove(struct spi_device *spi)
 {
-	struct kxsd9_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/accel/lis3l02dq_core.c b/drivers/staging/iio/accel/lis3l02dq_core.c
index ba5bc67..a29dfd2 100644
--- a/drivers/staging/iio/accel/lis3l02dq_core.c
+++ b/drivers/staging/iio/accel/lis3l02dq_core.c
@@ -676,7 +676,7 @@ static int __devinit lis3l02dq_probe(struct spi_device *spi)
 	}
 	st = iio_priv(indio_dev);
 	/* this is only used tor removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
 	st->us = spi;
 	mutex_init(&st->buf_lock);
diff --git a/drivers/staging/iio/accel/sca3000.h b/drivers/staging/iio/accel/sca3000.h
index cf0751d..1e396ce 100644
--- a/drivers/staging/iio/accel/sca3000.h
+++ b/drivers/staging/iio/accel/sca3000.h
@@ -173,7 +173,6 @@
 struct sca3000_state {
 	struct spi_device		*us;
 	const struct sca3000_chip_info	*info;
-	struct iio_dev			*indio_dev;
 	struct work_struct		interrupt_handler_ws;
 	s64				last_timestamp;
 	int				mo_det_use_count;
diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c
index f213b86..603f5bc 100644
--- a/drivers/staging/iio/accel/sca3000_core.c
+++ b/drivers/staging/iio/accel/sca3000_core.c
@@ -242,7 +242,7 @@ static int sca3000_check_status(struct device *dev)
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->lock);
 	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_STATUS, 1);
@@ -269,7 +269,7 @@ static ssize_t sca3000_show_rev(struct device *dev,
 {
 	int len = 0, ret;
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct sca3000_state *st = dev_info->dev_data;
+	struct sca3000_state *st = iio_priv(dev_info);
 
 	mutex_lock(&st->lock);
 	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_REVID, 1);
@@ -297,7 +297,7 @@ sca3000_show_available_measurement_modes(struct device *dev,
 					 char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct sca3000_state *st = dev_info->dev_data;
+	struct sca3000_state *st = iio_priv(dev_info);
 	int len = 0;
 
 	len += sprintf(buf + len, "0 - normal mode");
@@ -329,7 +329,7 @@ sca3000_show_measurement_mode(struct device *dev,
 			      char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct sca3000_state *st = dev_info->dev_data;
+	struct sca3000_state *st = iio_priv(dev_info);
 	int len = 0, ret;
 
 	mutex_lock(&st->lock);
@@ -380,7 +380,7 @@ sca3000_store_measurement_mode(struct device *dev,
 			       size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct sca3000_state *st = dev_info->dev_data;
+	struct sca3000_state *st = iio_priv(dev_info);
 	int ret;
 	int mask = 0x03;
 	long val;
@@ -453,7 +453,7 @@ static int sca3000_read_raw(struct iio_dev *indio_dev,
 			    int *val2,
 			    long mask)
 {
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret;
 	u8 address;
 
@@ -500,7 +500,7 @@ static ssize_t sca3000_read_av_freq(struct device *dev,
 			     char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int len = 0, ret, val;
 
 	mutex_lock(&st->lock);
@@ -571,7 +571,7 @@ static ssize_t sca3000_read_frequency(struct device *dev,
 			       char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret, len = 0, base_freq = 0, val;
 
 	mutex_lock(&st->lock);
@@ -613,7 +613,7 @@ static ssize_t sca3000_set_frequency(struct device *dev,
 			      size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret, base_freq = 0;
 	int ctrlval;
 	long val;
@@ -673,7 +673,7 @@ static ssize_t sca3000_read_temp(struct device *dev,
 				 char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret;
 	int val;
 	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_TEMP_MSB, 2);
@@ -699,7 +699,7 @@ static int sca3000_read_thresh(struct iio_dev *indio_dev,
 			       int *val)
 {
 	int ret, i;
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int num = IIO_EVENT_CODE_EXTRACT_MODIFIER(e);
 	mutex_lock(&st->lock);
 	ret = sca3000_read_ctrl_reg(st, sca3000_addresses[num][1]);
@@ -726,7 +726,7 @@ static int sca3000_write_thresh(struct iio_dev *indio_dev,
 				    int e,
 				    int val)
 {
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int num = IIO_EVENT_CODE_EXTRACT_MODIFIER(e);
 	int ret;
 	int i;
@@ -798,11 +798,10 @@ static const struct attribute_group sca3000_attribute_group_with_temp = {
 static irqreturn_t sca3000_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
-	struct sca3000_state *st;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret, val;
 	s64 last_timestamp = iio_get_time_ns();
 
-	st = indio_dev->dev_data;
 	/* Could lead if badly timed to an extra read of status reg,
 	 * but ensures no interrupt is missed.
 	 */
@@ -813,10 +812,10 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 	if (ret)
 		goto done;
 
-	sca3000_ring_int_process(val, st->indio_dev->ring);
+	sca3000_ring_int_process(val, indio_dev->ring);
 
 	if (val & SCA3000_INT_STATUS_FREE_FALL)
-		iio_push_event(st->indio_dev, 0,
+		iio_push_event(indio_dev, 0,
 			       IIO_MOD_EVENT_CODE(IIO_EV_CLASS_ACCEL,
 						  0,
 						  IIO_EV_MOD_X_AND_Y_AND_Z,
@@ -825,7 +824,7 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 			       last_timestamp);
 
 	if (val & SCA3000_INT_STATUS_Y_TRIGGER)
-		iio_push_event(st->indio_dev, 0,
+		iio_push_event(indio_dev, 0,
 			       IIO_MOD_EVENT_CODE(IIO_EV_CLASS_ACCEL,
 						  0,
 						  IIO_EV_MOD_Y,
@@ -834,7 +833,7 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 			       last_timestamp);
 
 	if (val & SCA3000_INT_STATUS_X_TRIGGER)
-		iio_push_event(st->indio_dev, 0,
+		iio_push_event(indio_dev, 0,
 			       IIO_MOD_EVENT_CODE(IIO_EV_CLASS_ACCEL,
 						  0,
 						  IIO_EV_MOD_X,
@@ -843,7 +842,7 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 			       last_timestamp);
 
 	if (val & SCA3000_INT_STATUS_Z_TRIGGER)
-		iio_push_event(st->indio_dev, 0,
+		iio_push_event(indio_dev, 0,
 			       IIO_MOD_EVENT_CODE(IIO_EV_CLASS_ACCEL,
 						  0,
 						  IIO_EV_MOD_Z,
@@ -861,7 +860,7 @@ done:
 static int sca3000_read_event_config(struct iio_dev *indio_dev,
 				     int e)
 {
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret;
 	u8 protect_mask = 0x03;
 	int num = IIO_EVENT_CODE_EXTRACT_MODIFIER(e);
@@ -895,7 +894,7 @@ static ssize_t sca3000_query_free_fall_mode(struct device *dev,
 {
 	int ret, len;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int val;
 
 	mutex_lock(&st->lock);
@@ -923,7 +922,7 @@ static ssize_t sca3000_set_free_fall_mode(struct device *dev,
 					  size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	long val;
 	int ret;
 	u8 protect_mask = SCA3000_FREE_FALL_DETECT;
@@ -965,7 +964,7 @@ static int sca3000_write_event_config(struct iio_dev *indio_dev,
 				      int e,
 				      int state)
 {
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret, ctrlval;
 	u8 protect_mask = 0x03;
 	int num = IIO_EVENT_CODE_EXTRACT_MODIFIER(e);
@@ -1126,42 +1125,38 @@ static int __devinit sca3000_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
 	struct sca3000_state *st;
+	struct iio_dev *indio_dev;
 
-	st = kzalloc(sizeof(struct sca3000_state), GFP_KERNEL);
-	if (st == NULL) {
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
 
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
 	st->us = spi;
 	mutex_init(&st->lock);
 	st->info = &sca3000_spi_chip_info_tbl[spi_get_device_id(spi)
 					      ->driver_data];
 
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_clear_st;
-	}
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
 	if (st->info->temp_output)
-		st->indio_dev->info = &sca3000_info_with_temp;
+		indio_dev->info = &sca3000_info_with_temp;
 	else {
-		st->indio_dev->info = &sca3000_info;
-		st->indio_dev->channels = sca3000_channels;
-		st->indio_dev->num_channels = ARRAY_SIZE(sca3000_channels);
+		indio_dev->info = &sca3000_info;
+		indio_dev->channels = sca3000_channels;
+		indio_dev->num_channels = ARRAY_SIZE(sca3000_channels);
 	}
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	sca3000_configure_ring(st->indio_dev);
-	ret = iio_device_register(st->indio_dev);
+	sca3000_configure_ring(indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret < 0)
 		goto error_free_dev;
 	regdone = 1;
-	ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
 					  sca3000_channels,
 					  ARRAY_SIZE(sca3000_channels));
 	if (ret < 0)
@@ -1172,11 +1167,11 @@ static int __devinit sca3000_probe(struct spi_device *spi)
 					   &sca3000_event_handler,
 					   IRQF_TRIGGER_FALLING,
 					   "sca3000",
-					   st->indio_dev);
+					   indio_dev);
 		if (ret)
 			goto error_unregister_ring;
 	}
-	sca3000_register_ring_funcs(st->indio_dev);
+	sca3000_register_ring_funcs(indio_dev);
 	ret = sca3000_clean_setup(st);
 	if (ret)
 		goto error_free_irq;
@@ -1184,17 +1179,16 @@ static int __devinit sca3000_probe(struct spi_device *spi)
 
 error_free_irq:
 	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
-		free_irq(spi->irq, st->indio_dev);
+		free_irq(spi->irq, indio_dev);
 error_unregister_ring:
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 error_unregister_dev:
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_clear_st:
-	kfree(st);
+		iio_free_device(indio_dev);
+
 error_ret:
 	return ret;
 }
@@ -1219,8 +1213,8 @@ error_ret:
 
 static int sca3000_remove(struct spi_device *spi)
 {
-	struct sca3000_state *st =  spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret;
 	/* Must ensure no interrupts can be generated after this!*/
 	ret = sca3000_stop_all_interrupts(st);
@@ -1232,8 +1226,6 @@ static int sca3000_remove(struct spi_device *spi)
 	sca3000_unconfigure_ring(indio_dev);
 	iio_device_unregister(indio_dev);
 
-	kfree(st);
-
 	return 0;
 }
 
diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c
index 7c4ff0b..a704c75 100644
--- a/drivers/staging/iio/accel/sca3000_ring.c
+++ b/drivers/staging/iio/accel/sca3000_ring.c
@@ -89,7 +89,7 @@ static int sca3000_read_first_n_hw_rb(struct iio_ring_buffer *r,
 {
 	struct iio_hw_ring_buffer *hw_ring = iio_to_hw_ring_buf(r);
 	struct iio_dev *indio_dev = hw_ring->private;
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	u8 *rx;
 	int ret, i, num_available, num_read = 0;
 	int bytes_per_sample = 1;
@@ -168,7 +168,7 @@ static ssize_t sca3000_query_ring_int(struct device *dev,
 	int ret, val;
 	struct iio_ring_buffer *ring = dev_get_drvdata(dev);
 	struct iio_dev *indio_dev = ring->indio_dev;
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->lock);
 	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1);
@@ -190,7 +190,7 @@ static ssize_t sca3000_set_ring_int(struct device *dev,
 {
 	struct iio_ring_buffer *ring = dev_get_drvdata(dev);
 	struct iio_dev *indio_dev = ring->indio_dev;
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	long val;
 	int ret;
@@ -240,7 +240,7 @@ static ssize_t sca3000_show_ring_bpse(struct device *dev,
 	int len = 0, ret;
 	struct iio_ring_buffer *ring = dev_get_drvdata(dev);
 	struct iio_dev *indio_dev = ring->indio_dev;
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->lock);
 	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
@@ -270,7 +270,7 @@ static ssize_t sca3000_store_ring_bpse(struct device *dev,
 {
 	struct iio_ring_buffer *ring = dev_get_drvdata(dev);
 	struct iio_dev *indio_dev = ring->indio_dev;
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret;
 
 	mutex_lock(&st->lock);
@@ -300,7 +300,7 @@ static ssize_t sca3000_show_buffer_scale(struct device *dev,
 {
 	struct iio_ring_buffer *ring = dev_get_drvdata(dev);
 	struct iio_dev *indio_dev = ring->indio_dev;
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 
 	return sprintf(buf, "0.%06d\n", 4*st->info->scale);
 }
@@ -397,7 +397,7 @@ void sca3000_unconfigure_ring(struct iio_dev *indio_dev)
 static inline
 int __sca3000_hw_ring_state_set(struct iio_dev *indio_dev, bool state)
 {
-	struct sca3000_state *st = indio_dev->dev_data;
+	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret;
 
 	mutex_lock(&st->lock);
diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig
index 8c751c4..b39f2e1 100644
--- a/drivers/staging/iio/adc/Kconfig
+++ b/drivers/staging/iio/adc/Kconfig
@@ -130,6 +130,20 @@ config AD7780
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad7780.
 
+config AD7793
+	tristate "Analog Devices AD7792 AD7793 ADC driver"
+	depends on SPI
+	select IIO_RING_BUFFER
+	select IIO_SW_RING
+	select IIO_TRIGGER
+	help
+	  Say yes here to build support for Analog Devices
+	  AD7792 and AD7793 SPI analog to digital convertors (ADC).
+	  If unsure, say N (but it's safe to say "Y").
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called AD7793.
+
 config AD7745
 	tristate "Analog Devices AD7745, AD7746 AD7747 capacitive sensor driver"
 	depends on I2C
diff --git a/drivers/staging/iio/adc/Makefile b/drivers/staging/iio/adc/Makefile
index 1d9b3f5..f020351 100644
--- a/drivers/staging/iio/adc/Makefile
+++ b/drivers/staging/iio/adc/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_AD7291) += ad7291.o
 obj-$(CONFIG_AD7314) += ad7314.o
 obj-$(CONFIG_AD7745) += ad7745.o
 obj-$(CONFIG_AD7780) += ad7780.o
+obj-$(CONFIG_AD7793) += ad7793.o
 obj-$(CONFIG_AD7816) += ad7816.o
 obj-$(CONFIG_ADT75) += adt75.o
 obj-$(CONFIG_ADT7310) += adt7310.o
diff --git a/drivers/staging/iio/adc/ad7150.c b/drivers/staging/iio/adc/ad7150.c
index ca32b67..04017ef 100644
--- a/drivers/staging/iio/adc/ad7150.c
+++ b/drivers/staging/iio/adc/ad7150.c
@@ -59,7 +59,6 @@
 
 struct ad7150_chip_info {
 	struct i2c_client *client;
-	struct iio_dev *indio_dev;
 	bool inter;
 	u16 ch1_threshold;     /* Ch1 Threshold (in fixed threshold mode) */
 	u8  ch1_sensitivity;   /* Ch1 Sensitivity (in adaptive threshold mode) */
@@ -184,7 +183,7 @@ static ssize_t ad7150_show_conversion_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%s\n", chip->conversion_mode);
 }
@@ -195,7 +194,7 @@ static ssize_t ad7150_store_conversion_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	u8 cfg;
 	int i;
 
@@ -234,7 +233,7 @@ static ssize_t ad7150_show_ch1_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	u8 data[2];
 
 	ad7150_i2c_read(chip, AD7150_CH1_DATA_HIGH, data, 2);
@@ -248,7 +247,7 @@ static ssize_t ad7150_show_ch2_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	u8 data[2];
 
 	ad7150_i2c_read(chip, AD7150_CH2_DATA_HIGH, data, 2);
@@ -262,7 +261,7 @@ static ssize_t ad7150_show_threshold_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%s\n", chip->threshold_mode);
 }
@@ -273,7 +272,7 @@ static ssize_t ad7150_store_threshold_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	u8 cfg;
 
 	ad7150_i2c_read(chip, AD7150_CFG, &cfg, 1);
@@ -305,7 +304,7 @@ static ssize_t ad7150_show_ch1_threshold(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch1_threshold);
 }
@@ -316,7 +315,7 @@ static ssize_t ad7150_store_ch1_threshold(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -341,7 +340,7 @@ static ssize_t ad7150_show_ch2_threshold(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch2_threshold);
 }
@@ -352,7 +351,7 @@ static ssize_t ad7150_store_ch2_threshold(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -377,7 +376,7 @@ static ssize_t ad7150_show_ch1_sensitivity(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch1_sensitivity);
 }
@@ -388,7 +387,7 @@ static ssize_t ad7150_store_ch1_sensitivity(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -412,7 +411,7 @@ static ssize_t ad7150_show_ch2_sensitivity(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch2_sensitivity);
 }
@@ -423,7 +422,7 @@ static ssize_t ad7150_store_ch2_sensitivity(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -447,7 +446,7 @@ static ssize_t ad7150_show_ch1_timeout(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch1_timeout);
 }
@@ -458,7 +457,7 @@ static ssize_t ad7150_store_ch1_timeout(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -482,7 +481,7 @@ static ssize_t ad7150_show_ch2_timeout(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch2_timeout);
 }
@@ -493,7 +492,7 @@ static ssize_t ad7150_store_ch2_timeout(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -517,7 +516,7 @@ static ssize_t ad7150_show_ch1_setup(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->ch1_setup);
 }
@@ -528,7 +527,7 @@ static ssize_t ad7150_store_ch1_setup(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -553,7 +552,7 @@ static ssize_t ad7150_show_ch2_setup(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->ch2_setup);
 }
@@ -564,7 +563,7 @@ static ssize_t ad7150_store_ch2_setup(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -588,7 +587,7 @@ static ssize_t ad7150_show_powerdown_timer(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->powerdown_timer);
 }
@@ -599,7 +598,7 @@ static ssize_t ad7150_store_powerdown_timer(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7150_chip_info *chip = dev_info->dev_data;
+	struct ad7150_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -645,7 +644,7 @@ static const struct attribute_group ad7150_attribute_group = {
 static irqreturn_t ad7150_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
-	struct ad7150_chip_info *chip = iio_dev_get_devdata(indio_dev);
+	struct ad7150_chip_info *chip = iio_priv(indio_dev);
 	u8 int_status;
 	s64 timestamp = iio_get_time_ns();
 
@@ -714,33 +713,29 @@ static int __devinit ad7150_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	int ret = 0, regdone = 0;
-	struct ad7150_chip_info *chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (chip == NULL) {
+	struct ad7150_chip_info *chip;
+	struct iio_dev *indio_dev;
+
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
-	i2c_set_clientdata(client, chip);
+	i2c_set_clientdata(client, indio_dev);
 
 	chip->client = client;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
-
 	/* Establish that the iio_dev is a child of the i2c device */
-	chip->indio_dev->name = id->name;
-	chip->indio_dev->dev.parent = &client->dev;
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = &client->dev;
 
-	chip->indio_dev->info = &ad7150_info;
-	chip->indio_dev->dev_data = (void *)(chip);
+	indio_dev->info = &ad7150_info;
 
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	regdone = 1;
@@ -752,7 +747,7 @@ static int __devinit ad7150_probe(struct i2c_client *client,
 					   IRQF_TRIGGER_RISING |
 					   IRQF_TRIGGER_FALLING,
 					   "ad7150",
-					   chip->indio_dev);
+					   indio_dev);
 		if (ret)
 			goto error_free_dev;
 	}
@@ -763,24 +758,20 @@ static int __devinit ad7150_probe(struct i2c_client *client,
 
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(chip->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int __devexit ad7150_remove(struct i2c_client *client)
 {
-	struct ad7150_chip_info *chip = i2c_get_clientdata(client);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 
 	if (client->irq)
 		free_irq(client->irq, indio_dev);
 	iio_device_unregister(indio_dev);
-	kfree(chip);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/ad7152.c b/drivers/staging/iio/adc/ad7152.c
index 7a38bcb..21f5f38 100644
--- a/drivers/staging/iio/adc/ad7152.c
+++ b/drivers/staging/iio/adc/ad7152.c
@@ -51,7 +51,6 @@
 
 struct ad7152_chip_info {
 	struct i2c_client *client;
-	struct iio_dev *indio_dev;
 	u16 ch1_offset;     /* Channel 1 offset calibration coefficient */
 	u16 ch1_gain;       /* Channel 1 gain coefficient */
 	u8  ch1_setup;
@@ -166,7 +165,7 @@ static ssize_t ad7152_show_ch1_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	u8 data[2];
 
 	ad7152_i2c_read(chip, AD7152_CH1_DATA_HIGH, data, 2);
@@ -180,7 +179,7 @@ static ssize_t ad7152_show_ch2_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	u8 data[2];
 
 	ad7152_i2c_read(chip, AD7152_CH2_DATA_HIGH, data, 2);
@@ -194,7 +193,7 @@ static ssize_t ad7152_show_conversion_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%s\n", chip->conversion_mode);
 }
@@ -205,7 +204,7 @@ static ssize_t ad7152_store_conversion_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	u8 cfg;
 	int i;
 
@@ -234,7 +233,7 @@ static ssize_t ad7152_show_ch1_offset(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch1_offset);
 }
@@ -245,7 +244,7 @@ static ssize_t ad7152_store_ch1_offset(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -270,7 +269,7 @@ static ssize_t ad7152_show_ch2_offset(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch2_offset);
 }
@@ -281,7 +280,7 @@ static ssize_t ad7152_store_ch2_offset(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -306,7 +305,7 @@ static ssize_t ad7152_show_ch1_gain(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch1_gain);
 }
@@ -317,7 +316,7 @@ static ssize_t ad7152_store_ch1_gain(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -342,7 +341,7 @@ static ssize_t ad7152_show_ch2_gain(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->ch2_gain);
 }
@@ -353,7 +352,7 @@ static ssize_t ad7152_store_ch2_gain(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -378,7 +377,7 @@ static ssize_t ad7152_show_ch1_setup(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->ch1_setup);
 }
@@ -389,7 +388,7 @@ static ssize_t ad7152_store_ch1_setup(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -413,7 +412,7 @@ static ssize_t ad7152_show_ch2_setup(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->ch2_setup);
 }
@@ -424,7 +423,7 @@ static ssize_t ad7152_store_ch2_setup(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -448,7 +447,7 @@ static ssize_t ad7152_show_filter_rate_setup(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->filter_rate_setup);
 }
@@ -459,7 +458,7 @@ static ssize_t ad7152_store_filter_rate_setup(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7152_chip_info *chip = dev_info->dev_data;
+	struct ad7152_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -509,31 +508,27 @@ static int __devinit ad7152_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	int ret = 0;
-	struct ad7152_chip_info *chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (chip == NULL) {
+	struct ad7152_chip_info *chip;
+	struct iio_dev *indio_dev;
+
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
-	i2c_set_clientdata(client, chip);
+	i2c_set_clientdata(client, indio_dev);
 
 	chip->client = client;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
-
 	/* Echipabilish that the iio_dev is a child of the i2c device */
-	chip->indio_dev->name = id->name;
-	chip->indio_dev->dev.parent = &client->dev;
-	chip->indio_dev->info = &ad7152_info;
-	chip->indio_dev->dev_data = (void *)(chip);
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &ad7152_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -542,20 +537,16 @@ static int __devinit ad7152_probe(struct i2c_client *client,
 	return 0;
 
 error_free_dev:
-	iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
+	iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int __devexit ad7152_remove(struct i2c_client *client)
 {
-	struct ad7152_chip_info *chip = i2c_get_clientdata(client);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 
 	iio_device_unregister(indio_dev);
-	kfree(chip);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/ad7291.c b/drivers/staging/iio/adc/ad7291.c
index 1be3453..96cbb17 100644
--- a/drivers/staging/iio/adc/ad7291.c
+++ b/drivers/staging/iio/adc/ad7291.c
@@ -61,7 +61,6 @@
 
 struct ad7291_chip_info {
 	struct i2c_client *client;
-	struct iio_dev *indio_dev;
 	u16 command;
 	u8  channels;	/* Active voltage channels */
 };
@@ -157,7 +156,7 @@ static ssize_t ad7291_show_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 
 	if (chip->command & AD7291_AUTOCYCLE)
 		return sprintf(buf, "autocycle\n");
@@ -171,7 +170,7 @@ static ssize_t ad7291_store_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 command;
 	int ret;
 
@@ -208,7 +207,7 @@ static ssize_t ad7291_store_reset(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 command;
 	int ret;
 
@@ -231,7 +230,7 @@ static ssize_t ad7291_show_ext_ref(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", !!(chip->command & AD7291_EXT_REF));
 }
@@ -242,7 +241,7 @@ static ssize_t ad7291_store_ext_ref(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 command;
 	int ret;
 
@@ -269,7 +268,7 @@ static ssize_t ad7291_show_noise_delay(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", !!(chip->command & AD7291_NOISE_DELAY));
 }
@@ -280,7 +279,7 @@ static ssize_t ad7291_store_noise_delay(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 command;
 	int ret;
 
@@ -307,7 +306,7 @@ static ssize_t ad7291_show_t_sense(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 data;
 	char sign = ' ';
 	int ret;
@@ -334,7 +333,7 @@ static ssize_t ad7291_show_t_average(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 data;
 	char sign = ' ';
 	int ret;
@@ -361,7 +360,7 @@ static ssize_t ad7291_show_voltage(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 data[AD7291_VOLTAGE_LIMIT_COUNT];
 	int i, size, ret;
 
@@ -390,7 +389,7 @@ static ssize_t ad7291_show_channel_mask(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%x\n", (chip->command & AD7291_VOLTAGE_MASK) >>
 			AD7291_VOLTAGE_OFFSET);
@@ -402,7 +401,7 @@ static ssize_t ad7291_store_channel_mask(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 command;
 	unsigned long data;
 	int i, ret;
@@ -457,7 +456,7 @@ static const struct attribute_group ad7291_attribute_group = {
 static irqreturn_t ad7291_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
-	struct ad7291_chip_info *chip = iio_dev_get_devdata(private);
+	struct ad7291_chip_info *chip = iio_priv(private);
 	u16 t_status, v_status;
 	u16 command;
 	int i;
@@ -532,7 +531,7 @@ static inline ssize_t ad7291_show_t_bound(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	u16 data;
 	char sign = ' ';
@@ -560,7 +559,7 @@ static inline ssize_t ad7291_set_t_bound(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	long tmp1, tmp2;
 	u16 data;
@@ -608,7 +607,7 @@ static inline ssize_t ad7291_show_v_bound(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	u16 data;
 	int ret;
 
@@ -633,7 +632,7 @@ static inline ssize_t ad7291_set_v_bound(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7291_chip_info *chip = dev_info->dev_data;
+	struct ad7291_chip_info *chip = iio_priv(dev_info);
 	unsigned long value;
 	u16 data;
 	int ret;
@@ -792,32 +791,27 @@ static int __devinit ad7291_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	struct ad7291_chip_info *chip;
+	struct iio_dev *indio_dev;
 	int ret = 0;
 
-	chip = kzalloc(sizeof(struct ad7291_chip_info), GFP_KERNEL);
-
-	if (chip == NULL)
-		return -ENOMEM;
-
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
-	i2c_set_clientdata(client, chip);
+	i2c_set_clientdata(client, indio_dev);
 
 	chip->client = client;
 	chip->command = AD7291_NOISE_DELAY | AD7291_T_SENSE_MASK;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
-
-	chip->indio_dev->name = id->name;
-	chip->indio_dev->dev.parent = &client->dev;
-	chip->indio_dev->info = &ad7291_info;
-	chip->indio_dev->dev_data = (void *)chip;
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &ad7291_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -827,7 +821,7 @@ static int __devinit ad7291_probe(struct i2c_client *client,
 					   &ad7291_event_handler,
 					   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 					   id->name,
-					   chip->indio_dev);
+					   indio_dev);
 		if (ret)
 			goto error_unreg_dev;
 
@@ -847,27 +841,23 @@ static int __devinit ad7291_probe(struct i2c_client *client,
 	return 0;
 
 error_unreg_irq:
-	free_irq(client->irq, chip->indio_dev);
+	free_irq(client->irq, indio_dev);
 error_unreg_dev:
-	iio_device_unregister(chip->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_dev:
-	iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
-
+	iio_free_device(indio_dev);
+error_ret:
 	return ret;
 }
 
 static int __devexit ad7291_remove(struct i2c_client *client)
 {
-	struct ad7291_chip_info *chip = i2c_get_clientdata(client);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 
 	if (client->irq)
-		free_irq(client->irq, chip->indio_dev);
+		free_irq(client->irq, indio_dev);
 	iio_device_unregister(indio_dev);
-	iio_free_device(chip->indio_dev);
-	kfree(chip);
+	iio_free_device(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/ad7314.c b/drivers/staging/iio/adc/ad7314.c
index 98bb16f..9070d9c 100644
--- a/drivers/staging/iio/adc/ad7314.c
+++ b/drivers/staging/iio/adc/ad7314.c
@@ -43,7 +43,6 @@
 
 struct ad7314_chip_info {
 	struct spi_device *spi_dev;
-	struct iio_dev *indio_dev;
 	s64 last_timestamp;
 	u8  mode;
 };
@@ -87,7 +86,7 @@ static ssize_t ad7314_show_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7314_chip_info *chip = dev_info->dev_data;
+	struct ad7314_chip_info *chip = iio_priv(dev_info);
 
 	if (chip->mode)
 		return sprintf(buf, "power-save\n");
@@ -101,7 +100,7 @@ static ssize_t ad7314_store_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7314_chip_info *chip = dev_info->dev_data;
+	struct ad7314_chip_info *chip = iio_priv(dev_info);
 	u16 mode = 0;
 	int ret;
 
@@ -136,7 +135,7 @@ static ssize_t ad7314_show_temperature(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7314_chip_info *chip = dev_info->dev_data;
+	struct ad7314_chip_info *chip = iio_priv(dev_info);
 	u16 data;
 	char sign = ' ';
 	int ret;
@@ -202,54 +201,45 @@ static const struct iio_info ad7314_info = {
 static int __devinit ad7314_probe(struct spi_device *spi_dev)
 {
 	struct ad7314_chip_info *chip;
+	struct iio_dev *indio_dev;
 	int ret = 0;
 
-	chip = kzalloc(sizeof(struct ad7314_chip_info), GFP_KERNEL);
-
-	if (chip == NULL)
-		return -ENOMEM;
-
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
 	dev_set_drvdata(&spi_dev->dev, chip);
 
 	chip->spi_dev = spi_dev;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
+	indio_dev->name = spi_get_device_id(spi_dev)->name;
+	indio_dev->dev.parent = &spi_dev->dev;
+	indio_dev->info = &ad7314_info;
 
-	chip->indio_dev->name = spi_get_device_id(spi_dev)->name;
-	chip->indio_dev->dev.parent = &spi_dev->dev;
-	chip->indio_dev->info = &ad7314_info;
-	chip->indio_dev->dev_data = (void *)chip;
-
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
 	dev_info(&spi_dev->dev, "%s temperature sensor registered.\n",
-			 chip->indio_dev->name);
+			 indio_dev->name);
 
 	return 0;
 error_free_dev:
-	iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
-
+	iio_free_device(indio_dev);
+error_ret:
 	return ret;
 }
 
 static int __devexit ad7314_remove(struct spi_device *spi_dev)
 {
-	struct ad7314_chip_info *chip = dev_get_drvdata(&spi_dev->dev);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev);
 
 	dev_set_drvdata(&spi_dev->dev, NULL);
 	iio_device_unregister(indio_dev);
-	iio_free_device(chip->indio_dev);
-	kfree(chip);
+	iio_free_device(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h
index 01a7021..0d44976 100644
--- a/drivers/staging/iio/adc/ad7476.h
+++ b/drivers/staging/iio/adc/ad7476.h
@@ -24,7 +24,6 @@ struct ad7476_chip_info {
 };
 
 struct ad7476_state {
-	struct iio_dev			*indio_dev;
 	struct spi_device		*spi;
 	const struct ad7476_chip_info	*chip_info;
 	struct regulator		*reg;
@@ -51,11 +50,11 @@ enum ad7476_supported_device_ids {
 };
 
 #ifdef CONFIG_IIO_RING_BUFFER
-int ad7476_scan_from_ring(struct ad7476_state *st);
+int ad7476_scan_from_ring(struct iio_dev *indio_dev);
 int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev);
 void ad7476_ring_cleanup(struct iio_dev *indio_dev);
 #else /* CONFIG_IIO_RING_BUFFER */
-static inline int ad7476_scan_from_ring(struct ad7476_state *st)
+static inline int ad7476_scan_from_ring(struct iio_dev *indio_dev)
 {
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/ad7476_core.c b/drivers/staging/iio/adc/ad7476_core.c
index 50cedb4..c210898 100644
--- a/drivers/staging/iio/adc/ad7476_core.c
+++ b/drivers/staging/iio/adc/ad7476_core.c
@@ -39,14 +39,14 @@ static int ad7476_read_raw(struct iio_dev *dev_info,
 			   long m)
 {
 	int ret;
-	struct ad7476_state *st = dev_info->dev_data;
+	struct ad7476_state *st = iio_priv(dev_info);
 	unsigned int scale_uv;
 
 	switch (m) {
 	case 0:
 		mutex_lock(&dev_info->mlock);
 		if (iio_ring_enabled(dev_info))
-			ret = ad7476_scan_from_ring(st);
+			ret = ad7476_scan_from_ring(dev_info);
 		else
 			ret = ad7476_scan_direct(st);
 		mutex_unlock(&dev_info->mlock);
@@ -127,23 +127,26 @@ static int __devinit ad7476_probe(struct spi_device *spi)
 {
 	struct ad7476_platform_data *pdata = spi->dev.platform_data;
 	struct ad7476_state *st;
+	struct iio_dev *indio_dev;
 	int ret, voltage_uv = 0;
+	bool reg_done = false;
+	struct regulator *reg;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-
-	st->reg = regulator_get(&spi->dev, "vcc");
-	if (!IS_ERR(st->reg)) {
-		ret = regulator_enable(st->reg);
+	st = iio_priv(indio_dev);
+	reg = regulator_get(&spi->dev, "vcc");
+	if (!IS_ERR(reg)) {
+		ret = regulator_enable(reg);
 		if (ret)
 			goto error_put_reg;
 
-		voltage_uv = regulator_get_voltage(st->reg);
+		voltage_uv = regulator_get_voltage(reg);
 	}
-
+	st->reg = reg;
 	st->chip_info =
 		&ad7476_chip_info_tbl[spi_get_device_id(spi)->driver_data];
 
@@ -156,24 +159,17 @@ static int __devinit ad7476_probe(struct spi_device *spi)
 	else
 		dev_warn(&spi->dev, "reference voltage unspecified\n");
 
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
 	st->spi = spi;
 
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_disable_reg;
-	}
-
 	/* Establish that the iio_dev is a child of the spi device */
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->name = spi_get_device_id(spi)->name;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
-	st->indio_dev->channels = st->chip_info->channel;
-	st->indio_dev->num_channels = 2;
-	st->indio_dev->info = &ad7476_info;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = st->chip_info->channel;
+	indio_dev->num_channels = 2;
+	indio_dev->info = &ad7476_info;
 	/* Setup default message */
 
 	st->xfer.rx_buf = &st->data;
@@ -182,15 +178,15 @@ static int __devinit ad7476_probe(struct spi_device *spi)
 	spi_message_init(&st->msg);
 	spi_message_add_tail(&st->xfer, &st->msg);
 
-	ret = ad7476_register_ring_funcs_and_init(st->indio_dev);
+	ret = ad7476_register_ring_funcs_and_init(indio_dev);
 	if (ret)
-		goto error_free_device;
+		goto error_disable_reg;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
-		goto error_free_device;
+		goto error_disable_reg;
 
-	ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
 					  st->chip_info->channel,
 					  ARRAY_SIZE(st->chip_info->channel));
 	if (ret)
@@ -198,33 +194,35 @@ static int __devinit ad7476_probe(struct spi_device *spi)
 	return 0;
 
 error_cleanup_ring:
-	ad7476_ring_cleanup(st->indio_dev);
-	iio_device_unregister(st->indio_dev);
-error_free_device:
-	iio_free_device(st->indio_dev);
+	ad7476_ring_cleanup(indio_dev);
+	iio_device_unregister(indio_dev);
 error_disable_reg:
-	if (!IS_ERR(st->reg))
+	if (!IS_ERR(reg))
 		regulator_disable(st->reg);
 error_put_reg:
-	if (!IS_ERR(st->reg))
-		regulator_put(st->reg);
-	kfree(st);
+	if (!IS_ERR(reg))
+		regulator_put(reg);
+	if (!reg_done)
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int ad7476_remove(struct spi_device *spi)
 {
-	struct ad7476_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad7476_state *st = iio_priv(indio_dev);
+	/* copy needed as st will have been freed */
+	struct regulator *reg = st->reg;
+
 	iio_ring_buffer_unregister(indio_dev->ring);
 	ad7476_ring_cleanup(indio_dev);
 	iio_device_unregister(indio_dev);
-	if (!IS_ERR(st->reg)) {
-		regulator_disable(st->reg);
-		regulator_put(st->reg);
+	if (!IS_ERR(reg)) {
+		regulator_disable(reg);
+		regulator_put(reg);
 	}
-	kfree(st);
+
 	return 0;
 }
 
diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c
index b1b2ee2..a92fc5a 100644
--- a/drivers/staging/iio/adc/ad7476_ring.c
+++ b/drivers/staging/iio/adc/ad7476_ring.c
@@ -22,9 +22,9 @@
 
 #include "ad7476.h"
 
-int ad7476_scan_from_ring(struct ad7476_state *st)
+int ad7476_scan_from_ring(struct iio_dev *indio_dev)
 {
-	struct iio_ring_buffer *ring = st->indio_dev->ring;
+	struct iio_ring_buffer *ring = indio_dev->ring;
 	int ret;
 	u8 *ring_data;
 
@@ -55,7 +55,7 @@ error_ret:
  **/
 static int ad7476_ring_preenable(struct iio_dev *indio_dev)
 {
-	struct ad7476_state *st = indio_dev->dev_data;
+	struct ad7476_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 
 	st->d_size = ring->scan_count *
@@ -79,7 +79,7 @@ static irqreturn_t ad7476_trigger_handler(int irq, void  *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct ad7476_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad7476_state *st = iio_priv(indio_dev);
 	s64 time_ns;
 	__u8 *rxbuf;
 	int b_sent;
@@ -115,7 +115,7 @@ static const struct iio_ring_setup_ops ad7476_ring_setup_ops = {
 
 int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 {
-	struct ad7476_state *st = indio_dev->dev_data;
+	struct ad7476_state *st = iio_priv(indio_dev);
 	int ret = 0;
 
 	indio_dev->ring = iio_sw_rb_allocate(indio_dev);
diff --git a/drivers/staging/iio/adc/ad7745.c b/drivers/staging/iio/adc/ad7745.c
index 1944223..4c13f26 100644
--- a/drivers/staging/iio/adc/ad7745.c
+++ b/drivers/staging/iio/adc/ad7745.c
@@ -54,7 +54,6 @@
 
 struct ad774x_chip_info {
 	struct i2c_client *client;
-	struct iio_dev *indio_dev;
 	bool inter;
 	u16 cap_offs;                   /* Capacitive offset */
 	u16 cap_gain;                   /* Capacitive gain calibration */
@@ -169,7 +168,7 @@ static ssize_t ad774x_show_conversion_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%s\n", chip->conversion_mode);
 }
@@ -180,7 +179,7 @@ static ssize_t ad774x_store_conversion_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	u8 cfg;
 	int i;
 
@@ -210,7 +209,7 @@ static ssize_t ad774x_show_dac_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	u8 data;
 
@@ -225,7 +224,7 @@ static ssize_t ad774x_store_dac_value(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	unsigned long data;
 	int ret;
@@ -256,7 +255,7 @@ static ssize_t ad774x_show_cap_setup(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->cap_setup);
 }
@@ -267,7 +266,7 @@ static ssize_t ad774x_store_cap_setup(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -291,7 +290,7 @@ static ssize_t ad774x_show_vt_setup(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->vt_setup);
 }
@@ -302,7 +301,7 @@ static ssize_t ad774x_store_vt_setup(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -326,7 +325,7 @@ static ssize_t ad774x_show_exec_setup(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%02x\n", chip->exec_setup);
 }
@@ -337,7 +336,7 @@ static ssize_t ad774x_store_exec_setup(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -361,7 +360,7 @@ static ssize_t ad774x_show_volt_gain(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->volt_gain);
 }
@@ -372,7 +371,7 @@ static ssize_t ad774x_store_volt_gain(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -397,7 +396,7 @@ static ssize_t ad774x_show_cap_data(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	char tmp[3];
 
@@ -414,7 +413,7 @@ static ssize_t ad774x_show_vt_data(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	char tmp[3];
 
@@ -431,7 +430,7 @@ static ssize_t ad774x_show_cap_offs(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->cap_offs);
 }
@@ -442,7 +441,7 @@ static ssize_t ad774x_store_cap_offs(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -467,7 +466,7 @@ static ssize_t ad774x_show_cap_gain(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->cap_gain);
 }
@@ -478,7 +477,7 @@ static ssize_t ad774x_store_cap_gain(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad774x_chip_info *chip = dev_info->dev_data;
+	struct ad774x_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -534,7 +533,7 @@ static const struct attribute_group ad774x_attribute_group = {
 static irqreturn_t ad774x_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
-	struct ad774x_chip_info *chip = iio_dev_get_devdata(indio_dev);
+	struct ad774x_chip_info *chip = iio_priv(indio_dev);
 	u8 int_status;
 
 	ad774x_i2c_read(chip, AD774X_STATUS, &int_status, 1);
@@ -579,31 +578,27 @@ static int __devinit ad774x_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	int ret = 0, regdone = 0;
-	struct ad774x_chip_info *chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (chip == NULL) {
+	struct ad774x_chip_info *chip;
+	struct iio_dev *indio_dev;
+
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
-	i2c_set_clientdata(client, chip);
+	i2c_set_clientdata(client, indio_dev);
 
 	chip->client = client;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
-
 	/* Establish that the iio_dev is a child of the i2c device */
-	chip->indio_dev->name = id->name;
-	chip->indio_dev->dev.parent = &client->dev;
-	chip->indio_dev->info = &ad774x_info;
-	chip->indio_dev->dev_data = (void *)(chip);
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &ad774x_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	regdone = 1;
@@ -614,7 +609,7 @@ static int __devinit ad774x_probe(struct i2c_client *client,
 					   &ad774x_event_handler,
 					   IRQF_TRIGGER_FALLING,
 					   "ad774x",
-					   chip->indio_dev);
+					   indio_dev);
 		if (ret)
 			goto error_free_dev;
 	}
@@ -625,24 +620,20 @@ static int __devinit ad774x_probe(struct i2c_client *client,
 
 error_free_dev:
 	if (regdone)
-		free_irq(client->irq, chip->indio_dev);
+		free_irq(client->irq, indio_dev);
 	else
-		iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
 
 static int __devexit ad774x_remove(struct i2c_client *client)
 {
-	struct ad774x_chip_info *chip = i2c_get_clientdata(client);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 
 	if (client->irq)
 		free_irq(client->irq, indio_dev);
 	iio_device_unregister(indio_dev);
-	kfree(chip);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/ad7793.c b/drivers/staging/iio/adc/ad7793.c
new file mode 100644
index 0000000..90f6c03
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7793.c
@@ -0,0 +1,987 @@
+/*
+ * AD7792/AD7793 SPI ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+#include "../ring_generic.h"
+#include "../ring_sw.h"
+#include "../trigger.h"
+#include "adc.h"
+
+#include "ad7793.h"
+
+/* NOTE:
+ * The AD7792/AD7793 features a dual use data out ready DOUT/RDY output.
+ * In order to avoid contentions on the SPI bus, it's therefore necessary
+ * to use spi bus locking.
+ *
+ * The DOUT/RDY output must also be wired to an interrupt capable GPIO.
+ */
+
+struct ad7793_chip_info {
+	struct iio_chan_spec		channel[7];
+};
+
+struct ad7793_state {
+	struct spi_device		*spi;
+	struct iio_trigger		*trig;
+	const struct ad7793_chip_info	*chip_info;
+	struct regulator		*reg;
+	struct ad7793_platform_data	*pdata;
+	wait_queue_head_t		wq_data_avail;
+	bool				done;
+	bool				irq_dis;
+	u16				int_vref_mv;
+	u16				mode;
+	u16				conf;
+	u32				scale_avail[8][2];
+	u32				available_scan_masks[7];
+	/*
+	 * DMA (thus cache coherency maintenance) requires the
+	 * transfer buffers to live in their own cache lines.
+	 */
+	u8				data[4] ____cacheline_aligned;
+};
+
+enum ad7793_supported_device_ids {
+	ID_AD7792,
+	ID_AD7793,
+};
+
+static int __ad7793_write_reg(struct ad7793_state *st, bool locked,
+			      bool cs_change, unsigned char reg,
+			      unsigned size, unsigned val)
+{
+	u8 *data = st->data;
+	struct spi_transfer t = {
+		.tx_buf		= data,
+		.len		= size + 1,
+		.cs_change	= cs_change,
+	};
+	struct spi_message m;
+
+	data[0] = AD7793_COMM_WRITE | AD7793_COMM_ADDR(reg);
+
+	switch (size) {
+	case 3:
+		data[1] = val >> 16;
+		data[2] = val >> 8;
+		data[3] = val;
+		break;
+	case 2:
+		data[1] = val >> 8;
+		data[2] = val;
+		break;
+	case 1:
+		data[1] = val;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t, &m);
+
+	if (locked)
+		return spi_sync_locked(st->spi, &m);
+	else
+		return spi_sync(st->spi, &m);
+}
+
+static int ad7793_write_reg(struct ad7793_state *st,
+			    unsigned reg, unsigned size, unsigned val)
+{
+	return __ad7793_write_reg(st, false, false, reg, size, val);
+}
+
+static int __ad7793_read_reg(struct ad7793_state *st, bool locked,
+			     bool cs_change, unsigned char reg,
+			     int *val, unsigned size)
+{
+	u8 *data = st->data;
+	int ret;
+	struct spi_transfer t[] = {
+		{
+			.tx_buf = data,
+			.len = 1,
+		}, {
+			.rx_buf = data,
+			.len = size,
+			.cs_change = cs_change,
+		},
+	};
+	struct spi_message m;
+
+	data[0] = AD7793_COMM_READ | AD7793_COMM_ADDR(reg);
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t[0], &m);
+	spi_message_add_tail(&t[1], &m);
+
+	if (locked)
+		ret = spi_sync_locked(st->spi, &m);
+	else
+		ret = spi_sync(st->spi, &m);
+
+	if (ret < 0)
+		return ret;
+
+	switch (size) {
+	case 3:
+		*val = data[0] << 16 | data[1] << 8 | data[2];
+		break;
+	case 2:
+		*val = data[0] << 8 | data[1];
+		break;
+	case 1:
+		*val = data[0];
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ad7793_read_reg(struct ad7793_state *st,
+			   unsigned reg, int *val, unsigned size)
+{
+	return __ad7793_read_reg(st, 0, 0, reg, val, size);
+}
+
+static int ad7793_read(struct ad7793_state *st, unsigned ch,
+		       unsigned len, int *val)
+{
+	int ret;
+	st->conf = (st->conf & ~AD7793_CONF_CHAN(-1)) | AD7793_CONF_CHAN(ch);
+	st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) |
+		AD7793_MODE_SEL(AD7793_MODE_SINGLE);
+
+	ad7793_write_reg(st, AD7793_REG_CONF, sizeof(st->conf), st->conf);
+
+	spi_bus_lock(st->spi->master);
+	st->done = false;
+
+	ret = __ad7793_write_reg(st, 1, 1, AD7793_REG_MODE,
+				 sizeof(st->mode), st->mode);
+	if (ret < 0)
+		goto out;
+
+	st->irq_dis = false;
+	enable_irq(st->spi->irq);
+	wait_event_interruptible(st->wq_data_avail, st->done);
+
+	ret = __ad7793_read_reg(st, 1, 0, AD7793_REG_DATA, val, len);
+out:
+	spi_bus_unlock(st->spi->master);
+
+	return ret;
+}
+
+static int ad7793_calibrate(struct ad7793_state *st, unsigned mode, unsigned ch)
+{
+	int ret;
+
+	st->conf = (st->conf & ~AD7793_CONF_CHAN(-1)) | AD7793_CONF_CHAN(ch);
+	st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) | AD7793_MODE_SEL(mode);
+
+	ad7793_write_reg(st, AD7793_REG_CONF, sizeof(st->conf), st->conf);
+
+	spi_bus_lock(st->spi->master);
+	st->done = false;
+
+	ret = __ad7793_write_reg(st, 1, 1, AD7793_REG_MODE,
+				 sizeof(st->mode), st->mode);
+	if (ret < 0)
+		goto out;
+
+	st->irq_dis = false;
+	enable_irq(st->spi->irq);
+	wait_event_interruptible(st->wq_data_avail, st->done);
+
+	st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) |
+		AD7793_MODE_SEL(AD7793_MODE_IDLE);
+
+	ret = __ad7793_write_reg(st, 1, 0, AD7793_REG_MODE,
+				 sizeof(st->mode), st->mode);
+out:
+	spi_bus_unlock(st->spi->master);
+
+	return ret;
+}
+
+static const u8 ad7793_calib_arr[6][2] = {
+	{AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN1P_AIN1M},
+	{AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN1P_AIN1M},
+	{AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN2P_AIN2M},
+	{AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN2P_AIN2M},
+	{AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN3P_AIN3M},
+	{AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN3P_AIN3M}
+};
+
+static int ad7793_calibrate_all(struct ad7793_state *st)
+{
+	int i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(ad7793_calib_arr); i++) {
+		ret = ad7793_calibrate(st, ad7793_calib_arr[i][0],
+				       ad7793_calib_arr[i][1]);
+		if (ret)
+			goto out;
+	}
+
+	return 0;
+out:
+	dev_err(&st->spi->dev, "Calibration failed\n");
+	return ret;
+}
+
+static int ad7793_setup(struct ad7793_state *st)
+{
+	int i, ret = -1;
+	unsigned long long scale_uv;
+	u32 id;
+
+	/* reset the serial interface */
+	ret = spi_write(st->spi, (u8 *)&ret, sizeof(ret));
+	if (ret < 0)
+		goto out;
+	msleep(1); /* Wait for at least 500us */
+
+	/* write/read test for device presence */
+	ret = ad7793_read_reg(st, AD7793_REG_ID, &id, 1);
+	if (ret)
+		goto out;
+
+	id &= AD7793_ID_MASK;
+
+	if (!((id == AD7792_ID) || (id == AD7793_ID))) {
+		dev_err(&st->spi->dev, "device ID query failed\n");
+		goto out;
+	}
+
+	st->mode  = (st->pdata->mode & ~AD7793_MODE_SEL(-1)) |
+			AD7793_MODE_SEL(AD7793_MODE_IDLE);
+	st->conf  = st->pdata->conf & ~AD7793_CONF_CHAN(-1);
+
+	ret = ad7793_write_reg(st, AD7793_REG_MODE, sizeof(st->mode), st->mode);
+	if (ret)
+		goto out;
+
+	ret = ad7793_write_reg(st, AD7793_REG_CONF, sizeof(st->conf), st->conf);
+	if (ret)
+		goto out;
+
+	ret = ad7793_write_reg(st, AD7793_REG_IO,
+			       sizeof(st->pdata->io), st->pdata->io);
+	if (ret)
+		goto out;
+
+	ret = ad7793_calibrate_all(st);
+	if (ret)
+		goto out;
+
+	/* Populate available ADC input ranges */
+	for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) {
+		scale_uv = ((u64)st->int_vref_mv * 100000000)
+			>> (st->chip_info->channel[0].scan_type.realbits -
+			(!!(st->conf & AD7793_CONF_UNIPOLAR) ? 0 : 1));
+		scale_uv >>= i;
+
+		st->scale_avail[i][1] = do_div(scale_uv, 100000000) * 10;
+		st->scale_avail[i][0] = scale_uv;
+	}
+
+	return 0;
+out:
+	dev_err(&st->spi->dev, "setup failed\n");
+	return ret;
+}
+
+static int ad7793_scan_from_ring(struct ad7793_state *st, unsigned ch, int *val)
+{
+	struct iio_ring_buffer *ring = iio_priv_to_dev(st)->ring;
+	int ret;
+	s64 dat64[2];
+	u32 *dat32 = (u32 *)dat64;
+
+	if (!(ring->scan_mask & (1 << ch)))
+		return  -EBUSY;
+
+	ret = ring->access->read_last(ring, (u8 *) &dat64);
+	if (ret)
+		return ret;
+
+	*val = *dat32;
+
+	return 0;
+}
+
+static int ad7793_ring_preenable(struct iio_dev *indio_dev)
+{
+	struct ad7793_state *st = iio_priv(indio_dev);
+	struct iio_ring_buffer *ring = indio_dev->ring;
+	size_t d_size;
+	unsigned channel;
+
+	if (!ring->scan_count)
+		return -EINVAL;
+
+	channel = __ffs(ring->scan_mask);
+
+	d_size = ring->scan_count *
+		 indio_dev->channels[0].scan_type.storagebits / 8;
+
+	if (ring->scan_timestamp) {
+		d_size += sizeof(s64);
+
+		if (d_size % sizeof(s64))
+			d_size += sizeof(s64) - (d_size % sizeof(s64));
+	}
+
+	if (indio_dev->ring->access->set_bytes_per_datum)
+		indio_dev->ring->access->set_bytes_per_datum(indio_dev->ring,
+							     d_size);
+
+	st->mode  = (st->mode & ~AD7793_MODE_SEL(-1)) |
+		    AD7793_MODE_SEL(AD7793_MODE_CONT);
+	st->conf  = (st->conf & ~AD7793_CONF_CHAN(-1)) |
+		    AD7793_CONF_CHAN(indio_dev->channels[channel].address);
+
+	ad7793_write_reg(st, AD7793_REG_CONF, sizeof(st->conf), st->conf);
+
+	spi_bus_lock(st->spi->master);
+	__ad7793_write_reg(st, 1, 1, AD7793_REG_MODE,
+			   sizeof(st->mode), st->mode);
+
+	st->irq_dis = false;
+	enable_irq(st->spi->irq);
+
+	return 0;
+}
+
+static int ad7793_ring_postdisable(struct iio_dev *indio_dev)
+{
+	struct ad7793_state *st = iio_priv(indio_dev);
+
+	st->mode  = (st->mode & ~AD7793_MODE_SEL(-1)) |
+		    AD7793_MODE_SEL(AD7793_MODE_IDLE);
+
+	st->done = false;
+	wait_event_interruptible(st->wq_data_avail, st->done);
+
+	if (!st->irq_dis)
+		disable_irq_nosync(st->spi->irq);
+
+	__ad7793_write_reg(st, 1, 0, AD7793_REG_MODE,
+			   sizeof(st->mode), st->mode);
+
+	return spi_bus_unlock(st->spi->master);
+}
+
+/**
+ * ad7793_trigger_handler() bh of trigger launched polling to ring buffer
+ **/
+
+static irqreturn_t ad7793_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->private_data;
+	struct iio_ring_buffer *ring = indio_dev->ring;
+	struct ad7793_state *st = iio_priv(indio_dev);
+	s64 dat64[2];
+	s32 *dat32 = (s32 *)dat64;
+
+	if (ring->scan_count)
+		__ad7793_read_reg(st, 1, 1, AD7793_REG_DATA,
+				  dat32,
+				  indio_dev->channels[0].scan_type.realbits/8);
+
+	/* Guaranteed to be aligned with 8 byte boundary */
+	if (ring->scan_timestamp)
+		dat64[1] = pf->timestamp;
+
+	ring->access->store_to(ring, (u8 *)dat64, pf->timestamp);
+
+	iio_trigger_notify_done(indio_dev->trig);
+	st->irq_dis = false;
+	enable_irq(st->spi->irq);
+
+	return IRQ_HANDLED;
+}
+
+static const struct iio_ring_setup_ops ad7793_ring_setup_ops = {
+	.preenable = &ad7793_ring_preenable,
+	.postenable = &iio_triggered_ring_postenable,
+	.predisable = &iio_triggered_ring_predisable,
+	.postdisable = &ad7793_ring_postdisable,
+};
+
+static int ad7793_register_ring_funcs_and_init(struct iio_dev *indio_dev)
+{
+	int ret;
+
+	indio_dev->ring = iio_sw_rb_allocate(indio_dev);
+	if (!indio_dev->ring) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	/* Effectively select the ring buffer implementation */
+	indio_dev->ring->access = &ring_sw_access_funcs;
+	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
+						 &ad7793_trigger_handler,
+						 IRQF_ONESHOT,
+						 indio_dev,
+						 "ad7793_consumer%d",
+						 indio_dev->id);
+	if (indio_dev->pollfunc == NULL) {
+		ret = -ENOMEM;
+		goto error_deallocate_sw_rb;
+	}
+
+	/* Ring buffer functions - here trigger setup related */
+	indio_dev->ring->setup_ops = &ad7793_ring_setup_ops;
+
+	/* Flag that polled ring buffering is possible */
+	indio_dev->modes |= INDIO_RING_TRIGGERED;
+	return 0;
+
+error_deallocate_sw_rb:
+	iio_sw_rb_free(indio_dev->ring);
+error_ret:
+	return ret;
+}
+
+static void ad7793_ring_cleanup(struct iio_dev *indio_dev)
+{
+	/* ensure that the trigger has been detached */
+	if (indio_dev->trig) {
+		iio_put_trigger(indio_dev->trig);
+		iio_trigger_dettach_poll_func(indio_dev->trig,
+					      indio_dev->pollfunc);
+	}
+	iio_dealloc_pollfunc(indio_dev->pollfunc);
+	iio_sw_rb_free(indio_dev->ring);
+}
+
+/**
+ * ad7793_data_rdy_trig_poll() the event handler for the data rdy trig
+ **/
+static irqreturn_t ad7793_data_rdy_trig_poll(int irq, void *private)
+{
+	struct ad7793_state *st = iio_priv(private);
+
+	st->done = true;
+	wake_up_interruptible(&st->wq_data_avail);
+	disable_irq_nosync(irq);
+	st->irq_dis = true;
+	iio_trigger_poll(st->trig, iio_get_time_ns());
+
+	return IRQ_HANDLED;
+}
+
+static int ad7793_probe_trigger(struct iio_dev *indio_dev)
+{
+	struct ad7793_state *st = iio_priv(indio_dev);
+	int ret;
+
+	st->trig = iio_allocate_trigger("%s-dev%d",
+					spi_get_device_id(st->spi)->name,
+					indio_dev->id);
+	if (st->trig == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+
+	ret = request_irq(st->spi->irq,
+			  ad7793_data_rdy_trig_poll,
+			  IRQF_TRIGGER_LOW,
+			  spi_get_device_id(st->spi)->name,
+			  indio_dev);
+	if (ret)
+		goto error_free_trig;
+
+	disable_irq_nosync(st->spi->irq);
+	st->irq_dis = true;
+	st->trig->dev.parent = &st->spi->dev;
+	st->trig->owner = THIS_MODULE;
+	st->trig->private_data = indio_dev;
+
+	ret = iio_trigger_register(st->trig);
+
+	/* select default trigger */
+	indio_dev->trig = st->trig;
+	if (ret)
+		goto error_free_irq;
+
+	return 0;
+
+error_free_irq:
+	free_irq(st->spi->irq, indio_dev);
+error_free_trig:
+	iio_free_trigger(st->trig);
+error_ret:
+	return ret;
+}
+
+static void ad7793_remove_trigger(struct iio_dev *indio_dev)
+{
+	struct ad7793_state *st = iio_priv(indio_dev);
+
+	iio_trigger_unregister(st->trig);
+	free_irq(st->spi->irq, indio_dev);
+	iio_free_trigger(st->trig);
+}
+
+static const u16 sample_freq_avail[16] = {0, 470, 242, 123, 62, 50, 39, 33, 19,
+					  17, 16, 12, 10, 8, 6, 4};
+
+static ssize_t ad7793_read_frequency(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad7793_state *st = iio_priv(indio_dev);
+
+	return sprintf(buf, "%d\n",
+		       sample_freq_avail[AD7793_MODE_RATE(st->mode)]);
+}
+
+static ssize_t ad7793_write_frequency(struct device *dev,
+		struct device_attribute *attr,
+		const char *buf,
+		size_t len)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad7793_state *st = iio_priv(indio_dev);
+	long lval;
+	int i, ret;
+
+	mutex_lock(&indio_dev->mlock);
+	if (iio_ring_enabled(indio_dev)) {
+		mutex_unlock(&indio_dev->mlock);
+		return -EBUSY;
+	}
+	mutex_unlock(&indio_dev->mlock);
+
+	ret = strict_strtol(buf, 10, &lval);
+	if (ret)
+		return ret;
+
+	ret = -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(sample_freq_avail); i++)
+		if (lval == sample_freq_avail[i]) {
+			mutex_lock(&indio_dev->mlock);
+			st->mode &= ~AD7793_MODE_RATE(-1);
+			st->mode |= AD7793_MODE_RATE(i);
+			ad7793_write_reg(st, AD7793_REG_MODE,
+					 sizeof(st->mode), st->mode);
+			mutex_unlock(&indio_dev->mlock);
+			ret = 0;
+		}
+
+	return ret ? ret : len;
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
+		ad7793_read_frequency,
+		ad7793_write_frequency);
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+	"470 242 123 62 50 39 33 19 17 16 12 10 8 6 4");
+
+static ssize_t ad7793_show_scale_available(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad7793_state *st = iio_priv(indio_dev);
+	int i, len = 0;
+
+	for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++)
+		len += sprintf(buf + len, "%d.%09u ", st->scale_avail[i][0],
+			       st->scale_avail[i][1]);
+
+	len += sprintf(buf + len, "\n");
+
+	return len;
+}
+
+static IIO_DEVICE_ATTR_NAMED(in_m_in_scale_available, in-in_scale_available,
+			     S_IRUGO, ad7793_show_scale_available, NULL, 0);
+
+static struct attribute *ad7793_attributes[] = {
+	&iio_dev_attr_sampling_frequency.dev_attr.attr,
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	&iio_dev_attr_in_m_in_scale_available.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group ad7793_attribute_group = {
+	.attrs = ad7793_attributes,
+};
+
+static int ad7793_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val,
+			   int *val2,
+			   long m)
+{
+	struct ad7793_state *st = iio_priv(indio_dev);
+	int ret, smpl = 0;
+	unsigned long long scale_uv;
+	bool unipolar = !!(st->conf & AD7793_CONF_UNIPOLAR);
+
+	switch (m) {
+	case 0:
+		mutex_lock(&indio_dev->mlock);
+		if (iio_ring_enabled(indio_dev))
+			ret = ad7793_scan_from_ring(st,
+					chan->scan_index, &smpl);
+		else
+			ret = ad7793_read(st, chan->address,
+					chan->scan_type.realbits / 8, &smpl);
+		mutex_unlock(&indio_dev->mlock);
+
+		if (ret < 0)
+			return ret;
+
+		*val = (smpl >> chan->scan_type.shift) &
+			((1 << (chan->scan_type.realbits)) - 1);
+
+		if (!unipolar)
+			*val -= (1 << (chan->scan_type.realbits - 1));
+
+		return IIO_VAL_INT;
+
+	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+		*val = st->scale_avail[(st->conf >> 8) & 0x7][0];
+		*val2 = st->scale_avail[(st->conf >> 8) & 0x7][1];
+
+		return IIO_VAL_INT_PLUS_NANO;
+
+	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+		switch (chan->type) {
+		case IIO_IN:
+			/* 1170mV / 2^23 * 6 */
+			scale_uv = (1170ULL * 100000000ULL * 6ULL)
+				>> (chan->scan_type.realbits -
+				(unipolar ? 0 : 1));
+			break;
+		case IIO_TEMP:
+			/* Always uses unity gain and internal ref */
+			scale_uv = (2500ULL * 100000000ULL)
+				>> (chan->scan_type.realbits -
+				(unipolar ? 0 : 1));
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		*val2 = do_div(scale_uv, 100000000) * 10;
+		*val =  scale_uv;
+
+		return IIO_VAL_INT_PLUS_NANO;
+	}
+	return -EINVAL;
+}
+
+static int ad7793_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct ad7793_state *st = iio_priv(indio_dev);
+	int ret, i;
+	unsigned int tmp;
+
+	mutex_lock(&indio_dev->mlock);
+	if (iio_ring_enabled(indio_dev)) {
+		mutex_unlock(&indio_dev->mlock);
+		return -EBUSY;
+	}
+
+	switch (mask) {
+	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+		ret = -EINVAL;
+		for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++)
+			if (val2 == st->scale_avail[i][1]) {
+				tmp = st->conf;
+				st->conf &= ~AD7793_CONF_GAIN(-1);
+				st->conf |= AD7793_CONF_GAIN(i);
+
+				if (tmp != st->conf) {
+					ad7793_write_reg(st, AD7793_REG_CONF,
+							 sizeof(st->conf),
+							 st->conf);
+					ad7793_calibrate_all(st);
+				}
+				ret = 0;
+			}
+
+	default:
+		ret = -EINVAL;
+	}
+
+	mutex_unlock(&indio_dev->mlock);
+	return ret;
+}
+
+static int ad7793_validate_trigger(struct iio_dev *indio_dev,
+				   struct iio_trigger *trig)
+{
+	if (indio_dev->trig != trig)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int ad7793_write_raw_get_fmt(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       long mask)
+{
+	return IIO_VAL_INT_PLUS_NANO;
+}
+
+static const struct iio_info ad7793_info = {
+	.read_raw = &ad7793_read_raw,
+	.write_raw = &ad7793_write_raw,
+	.write_raw_get_fmt = &ad7793_write_raw_get_fmt,
+	.attrs = &ad7793_attribute_group,
+	.validate_trigger = ad7793_validate_trigger,
+	.driver_module = THIS_MODULE,
+};
+
+static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
+	[ID_AD7793] = {
+		.channel[0] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD7793_CH_AIN1P_AIN1M,
+				    0, IIO_ST('s', 24, 32, 0), 0),
+		.channel[1] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 1, 1,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD7793_CH_AIN2P_AIN2M,
+				    1, IIO_ST('s', 24, 32, 0), 0),
+		.channel[2] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 2, 2,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD7793_CH_AIN3P_AIN3M,
+				    2, IIO_ST('s', 24, 32, 0), 0),
+		.channel[3] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, "shorted", 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD7793_CH_AIN1M_AIN1M,
+				    3, IIO_ST('s', 24, 32, 0), 0),
+		.channel[4] = IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+				    AD7793_CH_TEMP,
+				    4, IIO_ST('s', 24, 32, 0), 0),
+		.channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, "supply", 4, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+				    AD7793_CH_AVDD_MONITOR,
+				    5, IIO_ST('s', 24, 32, 0), 0),
+		.channel[6] = IIO_CHAN_SOFT_TIMESTAMP(6),
+	},
+	[ID_AD7792] = {
+		.channel[0] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD7793_CH_AIN1P_AIN1M,
+				    0, IIO_ST('s', 16, 32, 0), 0),
+		.channel[1] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 1, 1,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD7793_CH_AIN2P_AIN2M,
+				    1, IIO_ST('s', 16, 32, 0), 0),
+		.channel[2] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, NULL, 2, 2,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD7793_CH_AIN3P_AIN3M,
+				    2, IIO_ST('s', 16, 32, 0), 0),
+		.channel[3] = IIO_CHAN(IIO_IN_DIFF, 0, 1, 0, "shorted", 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD7793_CH_AIN1M_AIN1M,
+				    3, IIO_ST('s', 16, 32, 0), 0),
+		.channel[4] = IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+				    AD7793_CH_TEMP,
+				    4, IIO_ST('s', 16, 32, 0), 0),
+		.channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, "supply", 4, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+				    AD7793_CH_AVDD_MONITOR,
+				    5, IIO_ST('s', 16, 32, 0), 0),
+		.channel[6] = IIO_CHAN_SOFT_TIMESTAMP(6),
+	},
+};
+
+static int __devinit ad7793_probe(struct spi_device *spi)
+{
+	struct ad7793_platform_data *pdata = spi->dev.platform_data;
+	struct ad7793_state *st;
+	struct iio_dev *indio_dev;
+	int ret, i, voltage_uv = 0, regdone = 0;
+
+	if (!pdata) {
+		dev_err(&spi->dev, "no platform data?\n");
+		return -ENODEV;
+	}
+
+	if (!spi->irq) {
+		dev_err(&spi->dev, "no IRQ?\n");
+		return -ENODEV;
+	}
+
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+
+	st->reg = regulator_get(&spi->dev, "vcc");
+	if (!IS_ERR(st->reg)) {
+		ret = regulator_enable(st->reg);
+		if (ret)
+			goto error_put_reg;
+
+		voltage_uv = regulator_get_voltage(st->reg);
+	}
+
+	st->chip_info =
+		&ad7793_chip_info_tbl[spi_get_device_id(spi)->driver_data];
+
+	st->pdata = pdata;
+
+	if (pdata && pdata->vref_mv)
+		st->int_vref_mv = pdata->vref_mv;
+	else if (voltage_uv)
+		st->int_vref_mv = voltage_uv / 1000;
+	else
+		st->int_vref_mv = 2500; /* Build-in ref */
+
+	spi_set_drvdata(spi, indio_dev);
+	st->spi = spi;
+
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = st->chip_info->channel;
+	indio_dev->available_scan_masks = st->available_scan_masks;
+	indio_dev->num_channels = 7;
+	indio_dev->info = &ad7793_info;
+
+	for (i = 0; i < indio_dev->num_channels; i++)
+		st->available_scan_masks[i] = (1 << i) | (1 <<
+			indio_dev->channels[indio_dev->num_channels - 1].
+			scan_index);
+
+	init_waitqueue_head(&st->wq_data_avail);
+
+	ret = ad7793_register_ring_funcs_and_init(indio_dev);
+	if (ret)
+		goto error_disable_reg;
+
+	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto error_unreg_ring;
+	regdone = 1;
+
+	ret = ad7793_probe_trigger(indio_dev);
+	if (ret)
+		goto error_unreg_ring;
+
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
+					  indio_dev->channels,
+					  indio_dev->num_channels);
+	if (ret)
+		goto error_remove_trigger;
+
+	ret = ad7793_setup(st);
+	if (ret)
+		goto error_uninitialize_ring;
+
+	return 0;
+
+error_uninitialize_ring:
+	iio_ring_buffer_unregister(indio_dev->ring);
+error_remove_trigger:
+	ad7793_remove_trigger(indio_dev);
+error_unreg_ring:
+	ad7793_ring_cleanup(indio_dev);
+error_disable_reg:
+	if (!IS_ERR(st->reg))
+		regulator_disable(st->reg);
+error_put_reg:
+	if (!IS_ERR(st->reg))
+		regulator_put(st->reg);
+
+	if (regdone)
+		iio_device_unregister(indio_dev);
+	else
+		iio_free_device(indio_dev);
+
+	return ret;
+}
+
+static int ad7793_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad7793_state *st = iio_priv(indio_dev);
+
+	iio_ring_buffer_unregister(indio_dev->ring);
+	ad7793_remove_trigger(indio_dev);
+	ad7793_ring_cleanup(indio_dev);
+
+	if (!IS_ERR(st->reg)) {
+		regulator_disable(st->reg);
+		regulator_put(st->reg);
+	}
+
+	iio_device_unregister(indio_dev);
+
+	return 0;
+}
+
+static const struct spi_device_id ad7793_id[] = {
+	{"ad7792", ID_AD7792},
+	{"ad7793", ID_AD7793},
+	{}
+};
+
+static struct spi_driver ad7793_driver = {
+	.driver = {
+		.name	= "ad7793",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= ad7793_probe,
+	.remove		= __devexit_p(ad7793_remove),
+	.id_table	= ad7793_id,
+};
+
+static int __init ad7793_init(void)
+{
+	return spi_register_driver(&ad7793_driver);
+}
+module_init(ad7793_init);
+
+static void __exit ad7793_exit(void)
+{
+	spi_unregister_driver(&ad7793_driver);
+}
+module_exit(ad7793_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("Analog Devices AD7792/3 ADC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/adc/ad7793.h b/drivers/staging/iio/adc/ad7793.h
new file mode 100644
index 0000000..64f7d41
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7793.h
@@ -0,0 +1,107 @@
+/*
+ * AD7792/AD7793 SPI ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+#ifndef IIO_ADC_AD7793_H_
+#define IIO_ADC_AD7793_H_
+
+/*
+ * TODO: struct ad7793_platform_data needs to go into include/linux/iio
+ */
+
+/* Registers */
+#define AD7793_REG_COMM		0 /* Communications Register (WO, 8-bit) */
+#define AD7793_REG_STAT		0 /* Status Register	     (RO, 8-bit) */
+#define AD7793_REG_MODE		1 /* Mode Register	     (RW, 16-bit */
+#define AD7793_REG_CONF		2 /* Configuration Register  (RW, 16-bit) */
+#define AD7793_REG_DATA		3 /* Data Register	     (RO, 16-/24-bit) */
+#define AD7793_REG_ID		4 /* ID Register	     (RO, 8-bit) */
+#define AD7793_REG_IO		5 /* IO Register	     (RO, 8-bit) */
+#define AD7793_REG_OFFSET	6 /* Offset Register	     (RW, 16-bit
+				   * (AD7792)/24-bit (AD7793)) */
+#define AD7793_REG_FULLSALE	7 /* Full-Scale Register
+				   * (RW, 16-bit (AD7792)/24-bit (AD7793)) */
+
+/* Communications Register Bit Designations (AD7793_REG_COMM) */
+#define AD7793_COMM_WEN		(1 << 7) /* Write Enable */
+#define AD7793_COMM_WRITE	(0 << 6) /* Write Operation */
+#define AD7793_COMM_READ	(1 << 6) /* Read Operation */
+#define AD7793_COMM_ADDR(x)	(((x) & 0x7) << 3) /* Register Address */
+#define AD7793_COMM_CREAD	(1 << 2) /* Continuous Read of Data Register */
+
+/* Status Register Bit Designations (AD7793_REG_STAT) */
+#define AD7793_STAT_RDY		(1 << 7) /* Ready */
+#define AD7793_STAT_ERR		(1 << 6) /* Error (Overrange, Underrange) */
+#define AD7793_STAT_CH3		(1 << 2) /* Channel 3 */
+#define AD7793_STAT_CH2		(1 << 1) /* Channel 2 */
+#define AD7793_STAT_CH1		(1 << 0) /* Channel 1 */
+
+/* Mode Register Bit Designations (AD7793_REG_MODE) */
+#define AD7793_MODE_SEL(x)	(((x) & 0x7) << 13) /* Operation Mode Select */
+#define AD7793_MODE_CLKSRC(x)	(((x) & 0x3) << 6) /* ADC Clock Source Select */
+#define AD7793_MODE_RATE(x)	((x) & 0xF) /* Filter Update Rate Select */
+
+#define AD7793_MODE_CONT		0 /* Continuous Conversion Mode */
+#define AD7793_MODE_SINGLE		1 /* Single Conversion Mode */
+#define AD7793_MODE_IDLE		2 /* Idle Mode */
+#define AD7793_MODE_PWRDN		3 /* Power-Down Mode */
+#define AD7793_MODE_CAL_INT_ZERO	4 /* Internal Zero-Scale Calibration */
+#define AD7793_MODE_CAL_INT_FULL	5 /* Internal Full-Scale Calibration */
+#define AD7793_MODE_CAL_SYS_ZERO	6 /* System Zero-Scale Calibration */
+#define AD7793_MODE_CAL_SYS_FULL	7 /* System Full-Scale Calibration */
+
+#define AD7793_CLK_INT		0 /* Internal 64 kHz Clock not
+				   * available at the CLK pin */
+#define AD7793_CLK_INT_CO	1 /* Internal 64 kHz Clock available
+				   * at the CLK pin */
+#define AD7793_CLK_EXT		2 /* External 64 kHz Clock */
+#define AD7793_CLK_EXT_DIV2	3 /* External Clock divided by 2 */
+
+/* Configuration Register Bit Designations (AD7793_REG_CONF) */
+#define AD7793_CONF_VBIAS(x)	(((x) & 0x3) << 14) /* Bias Voltage
+						     * Generator Enable */
+#define AD7793_CONF_BO_EN	(1 << 13) /* Burnout Current Enable */
+#define AD7793_CONF_UNIPOLAR	(1 << 12) /* Unipolar/Bipolar Enable */
+#define AD7793_CONF_BOOST	(1 << 11) /* Boost Enable */
+#define AD7793_CONF_GAIN(x)	(((x) & 0x7) << 8) /* Gain Select */
+#define AD7793_CONF_REFSEL	(1 << 7) /* INT/EXT Reference Select */
+#define AD7793_CONF_BUF		(1 << 4) /* Buffered Mode Enable */
+#define AD7793_CONF_CHAN(x)	((x) & 0x7) /* Channel select */
+
+#define AD7793_CH_AIN1P_AIN1M	0 /* AIN1(+) - AIN1(-) */
+#define AD7793_CH_AIN2P_AIN2M	1 /* AIN2(+) - AIN2(-) */
+#define AD7793_CH_AIN3P_AIN3M	2 /* AIN3(+) - AIN3(-) */
+#define AD7793_CH_AIN1M_AIN1M	3 /* AIN1(-) - AIN1(-) */
+#define AD7793_CH_TEMP		6 /* Temp Sensor */
+#define AD7793_CH_AVDD_MONITOR	7 /* AVDD Monitor */
+
+/* ID Register Bit Designations (AD7793_REG_ID) */
+#define AD7792_ID		0xA
+#define AD7793_ID		0xB
+#define AD7793_ID_MASK		0xF
+
+/* IO (Excitation Current Sources) Register Bit Designations (AD7793_REG_IO) */
+#define AD7793_IO_IEXC1_IOUT1_IEXC2_IOUT2	0 /* IEXC1 connect to IOUT1,
+						   * IEXC2 connect to IOUT2 */
+#define AD7793_IO_IEXC1_IOUT2_IEXC2_IOUT1	1 /* IEXC1 connect to IOUT2,
+						   * IEXC2 connect to IOUT1 */
+#define AD7793_IO_IEXC1_IEXC2_IOUT1		2 /* Both current sources
+						   * IEXC1,2 connect to IOUT1 */
+#define AD7793_IO_IEXC1_IEXC2_IOUT2		3 /* Both current sources
+						   * IEXC1,2 connect to IOUT2 */
+
+#define AD7793_IO_IXCEN_10uA	(1 << 0) /* Excitation Current 10uA */
+#define AD7793_IO_IXCEN_210uA	(2 << 0) /* Excitation Current 210uA */
+#define AD7793_IO_IXCEN_1mA	(3 << 0) /* Excitation Current 1mA */
+
+struct ad7793_platform_data {
+	u16			vref_mv;
+	u16			mode;
+	u16			conf;
+	u8			io;
+};
+
+#endif /* IIO_ADC_AD7793_H_ */
diff --git a/drivers/staging/iio/adc/ad7816.c b/drivers/staging/iio/adc/ad7816.c
index 11379e4..0c84217 100644
--- a/drivers/staging/iio/adc/ad7816.c
+++ b/drivers/staging/iio/adc/ad7816.c
@@ -43,7 +43,6 @@
 
 struct ad7816_chip_info {
 	struct spi_device *spi_dev;
-	struct iio_dev *indio_dev;
 	u16 rdwr_pin;
 	u16 convert_pin;
 	u16 busy_pin;
@@ -113,7 +112,7 @@ static ssize_t ad7816_show_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7816_chip_info *chip = dev_info->dev_data;
+	struct ad7816_chip_info *chip = iio_priv(dev_info);
 
 	if (chip->mode)
 		return sprintf(buf, "power-save\n");
@@ -127,7 +126,7 @@ static ssize_t ad7816_store_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7816_chip_info *chip = dev_info->dev_data;
+	struct ad7816_chip_info *chip = iio_priv(dev_info);
 
 	if (strcmp(buf, "full")) {
 		gpio_set_value(chip->rdwr_pin, 1);
@@ -159,7 +158,7 @@ static ssize_t ad7816_show_channel(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7816_chip_info *chip = dev_info->dev_data;
+	struct ad7816_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", chip->channel_id);
 }
@@ -170,7 +169,7 @@ static ssize_t ad7816_store_channel(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7816_chip_info *chip = dev_info->dev_data;
+	struct ad7816_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 
@@ -208,7 +207,7 @@ static ssize_t ad7816_show_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7816_chip_info *chip = dev_info->dev_data;
+	struct ad7816_chip_info *chip = iio_priv(dev_info);
 	u16 data;
 	s8 value;
 	int ret;
@@ -265,7 +264,7 @@ static ssize_t ad7816_show_oti(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7816_chip_info *chip = dev_info->dev_data;
+	struct ad7816_chip_info *chip = iio_priv(dev_info);
 	int value;
 
 	if (chip->channel_id > AD7816_CS_MAX) {
@@ -286,7 +285,7 @@ static inline ssize_t ad7816_set_oti(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7816_chip_info *chip = dev_info->dev_data;
+	struct ad7816_chip_info *chip = iio_priv(dev_info);
 	long value;
 	u8 data;
 	int ret;
@@ -345,6 +344,7 @@ static const struct iio_info ad7816_info = {
 static int __devinit ad7816_probe(struct spi_device *spi_dev)
 {
 	struct ad7816_chip_info *chip;
+	struct iio_dev *indio_dev;
 	unsigned short *pins = spi_dev->dev.platform_data;
 	int ret = 0;
 	int i;
@@ -354,13 +354,14 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev)
 		return -EINVAL;
 	}
 
-	chip = kzalloc(sizeof(struct ad7816_chip_info), GFP_KERNEL);
-
-	if (chip == NULL)
-		return -ENOMEM;
-
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
-	dev_set_drvdata(&spi_dev->dev, chip);
+	dev_set_drvdata(&spi_dev->dev, indio_dev);
 
 	chip->spi_dev = spi_dev;
 	for (i = 0; i <= AD7816_CS_MAX; i++)
@@ -373,7 +374,7 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev)
 	if (ret) {
 		dev_err(&spi_dev->dev, "Fail to request rdwr gpio PIN %d.\n",
 			chip->rdwr_pin);
-		goto error_free_chip;
+		goto error_free_device;
 	}
 	gpio_direction_input(chip->rdwr_pin);
 	ret = gpio_request(chip->convert_pin, spi_get_device_id(spi_dev)->name);
@@ -391,20 +392,14 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev)
 	}
 	gpio_direction_input(chip->busy_pin);
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_gpio;
-	}
-	chip->indio_dev->name = spi_get_device_id(spi_dev)->name;
-	chip->indio_dev->dev.parent = &spi_dev->dev;
-	chip->indio_dev->info = &ad7816_info;
-	chip->indio_dev->dev_data = (void *)chip;
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi_get_device_id(spi_dev)->name;
+	indio_dev->dev.parent = &spi_dev->dev;
+	indio_dev->info = &ad7816_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
-		goto error_free_dev;
+		goto error_free_gpio;
 
 	if (spi_dev->irq) {
 		/* Only low trigger is supported in ad7816/7/8 */
@@ -412,47 +407,44 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev)
 					   NULL,
 					   &ad7816_event_handler,
 					   IRQF_TRIGGER_LOW,
-					   chip->indio_dev->name,
-					   chip->indio_dev);
+					   indio_dev->name,
+					   indio_dev);
 		if (ret)
 			goto error_unreg_dev;
 	}
 
 	dev_info(&spi_dev->dev, "%s temperature sensor and ADC registered.\n",
-			 chip->indio_dev->name);
+			 indio_dev->name);
 
 	return 0;
 
 error_unreg_dev:
-	iio_device_unregister(chip->indio_dev);
-error_free_dev:
-	iio_free_device(chip->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_gpio:
 	gpio_free(chip->busy_pin);
 error_free_gpio_convert:
 	gpio_free(chip->convert_pin);
 error_free_gpio_rdwr:
 	gpio_free(chip->rdwr_pin);
-error_free_chip:
-	kfree(chip);
-
+error_free_device:
+	iio_free_device(indio_dev);
+error_ret:
 	return ret;
 }
 
 static int __devexit ad7816_remove(struct spi_device *spi_dev)
 {
-	struct ad7816_chip_info *chip = dev_get_drvdata(&spi_dev->dev);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev);
+	struct ad7816_chip_info *chip = iio_priv(indio_dev);
 
 	dev_set_drvdata(&spi_dev->dev, NULL);
 	if (spi_dev->irq)
 		free_irq(spi_dev->irq, indio_dev);
-	iio_device_unregister(indio_dev);
-	iio_free_device(chip->indio_dev);
 	gpio_free(chip->busy_pin);
 	gpio_free(chip->convert_pin);
 	gpio_free(chip->rdwr_pin);
-	kfree(chip);
+	iio_device_unregister(indio_dev);
+	iio_free_device(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/ad7887_core.c b/drivers/staging/iio/adc/ad7887_core.c
index de14b17..3d9121e 100644
--- a/drivers/staging/iio/adc/ad7887_core.c
+++ b/drivers/staging/iio/adc/ad7887_core.c
@@ -37,7 +37,7 @@ static int ad7887_read_raw(struct iio_dev *dev_info,
 			   long m)
 {
 	int ret;
-	struct ad7887_state *st = dev_info->dev_data;
+	struct ad7887_state *st = iio_priv(dev_info);
 	unsigned int scale_uv;
 
 	switch (m) {
@@ -118,7 +118,6 @@ static int __devinit ad7887_probe(struct spi_device *spi)
 	/* Estabilish that the iio_dev is a child of the spi device */
 	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev_data = (void *)(st);
 	indio_dev->info = &ad7887_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
diff --git a/drivers/staging/iio/adc/ad7887_ring.c b/drivers/staging/iio/adc/ad7887_ring.c
index 0e4a5f4..0ac7c0b 100644
--- a/drivers/staging/iio/adc/ad7887_ring.c
+++ b/drivers/staging/iio/adc/ad7887_ring.c
@@ -64,7 +64,7 @@ error_ret:
  **/
 static int ad7887_ring_preenable(struct iio_dev *indio_dev)
 {
-	struct ad7887_state *st = indio_dev->dev_data;
+	struct ad7887_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 
 	st->d_size = ring->scan_count *
@@ -100,7 +100,7 @@ static int ad7887_ring_preenable(struct iio_dev *indio_dev)
 
 static int ad7887_ring_postdisable(struct iio_dev *indio_dev)
 {
-	struct ad7887_state *st = indio_dev->dev_data;
+	struct ad7887_state *st = iio_priv(indio_dev);
 
 	/* dummy read: restore default CH0 settin */
 	return spi_sync(st->spi, &st->msg[AD7887_CH0]);
@@ -116,7 +116,7 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct ad7887_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad7887_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 	s64 time_ns;
 	__u8 *buf;
diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c
index 29bfbcf..92cfe2e 100644
--- a/drivers/staging/iio/adc/ad799x_core.c
+++ b/drivers/staging/iio/adc/ad799x_core.c
@@ -143,7 +143,7 @@ static int ad799x_read_raw(struct iio_dev *dev_info,
 			   long m)
 {
 	int ret;
-	struct ad799x_state *st = dev_info->dev_data;
+	struct ad799x_state *st = iio_priv(dev_info);
 	unsigned int scale_uv;
 
 	switch (m) {
@@ -176,7 +176,7 @@ static ssize_t ad799x_read_frequency(struct device *dev,
 					char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad799x_state *st = iio_dev_get_devdata(dev_info);
+	struct ad799x_state *st = iio_priv(dev_info);
 
 	int ret, len = 0;
 	u8 val;
@@ -221,7 +221,7 @@ static ssize_t ad799x_write_frequency(struct device *dev,
 					 size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad799x_state *st = iio_dev_get_devdata(dev_info);
+	struct ad799x_state *st = iio_priv(dev_info);
 
 	long val;
 	int ret;
@@ -281,7 +281,7 @@ static ssize_t ad799x_read_channel_config(struct device *dev,
 					char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad799x_state *st = iio_dev_get_devdata(dev_info);
+	struct ad799x_state *st = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	int ret;
@@ -299,7 +299,7 @@ static ssize_t ad799x_write_channel_config(struct device *dev,
 					 size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad799x_state *st = iio_dev_get_devdata(dev_info);
+	struct ad799x_state *st = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	long val;
@@ -319,7 +319,7 @@ static ssize_t ad799x_write_channel_config(struct device *dev,
 static irqreturn_t ad799x_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
-	struct ad799x_state *st = iio_dev_get_devdata(private);
+	struct ad799x_state *st = iio_priv(private);
 	u8 status;
 	int i, ret;
 
@@ -686,7 +686,6 @@ static int __devinit ad799x_probe(struct i2c_client *client,
 	indio_dev->name = id->name;
 	indio_dev->info = st->chip_info->info;
 	indio_dev->name = id->name;
-	indio_dev->dev_data = (void *)(st);
 
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = st->chip_info->channel;
diff --git a/drivers/staging/iio/adc/ad799x_ring.c b/drivers/staging/iio/adc/ad799x_ring.c
index 1ae8857..0376a82 100644
--- a/drivers/staging/iio/adc/ad799x_ring.c
+++ b/drivers/staging/iio/adc/ad799x_ring.c
@@ -72,7 +72,7 @@ error_ret:
 static int ad799x_ring_preenable(struct iio_dev *indio_dev)
 {
 	struct iio_ring_buffer *ring = indio_dev->ring;
-	struct ad799x_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad799x_state *st = iio_priv(indio_dev);
 
 	/*
 	 * Need to figure out the current mode based upon the requested
@@ -109,7 +109,7 @@ static irqreturn_t ad799x_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct ad799x_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad799x_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 	s64 time_ns;
 	__u8 *rxbuf;
diff --git a/drivers/staging/iio/adc/adt7310.c b/drivers/staging/iio/adc/adt7310.c
index 68eca0b..1a41b80 100644
--- a/drivers/staging/iio/adc/adt7310.c
+++ b/drivers/staging/iio/adc/adt7310.c
@@ -80,7 +80,6 @@
 
 struct adt7310_chip_info {
 	struct spi_device *spi_dev;
-	struct iio_dev *indio_dev;
 	u8  config;
 };
 
@@ -176,7 +175,7 @@ static ssize_t adt7310_show_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	u8 config;
 
 	config = chip->config & ADT7310_MODE_MASK;
@@ -199,7 +198,7 @@ static ssize_t adt7310_store_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	u16 config;
 	int ret;
 
@@ -243,7 +242,7 @@ static ssize_t adt7310_show_resolution(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	int ret;
 	int bits;
 
@@ -265,7 +264,7 @@ static ssize_t adt7310_store_resolution(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	u16 config;
 	int ret;
@@ -301,7 +300,7 @@ static ssize_t adt7310_show_id(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	u8 id;
 	int ret;
 
@@ -351,7 +350,7 @@ static ssize_t adt7310_show_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	u8 status;
 	u16 data;
 	int ret, i = 0;
@@ -390,7 +389,7 @@ static const struct attribute_group adt7310_attribute_group = {
 static irqreturn_t adt7310_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
-	struct adt7310_chip_info *chip = iio_dev_get_devdata(indio_dev);
+	struct adt7310_chip_info *chip = iio_priv(indio_dev);
 	s64 timestamp = iio_get_time_ns();
 	u8 status;
 	int ret;
@@ -425,7 +424,7 @@ static ssize_t adt7310_show_event_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	int ret;
 
 	ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
@@ -444,7 +443,7 @@ static ssize_t adt7310_set_event_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	u16 config;
 	int ret;
 
@@ -477,7 +476,7 @@ static ssize_t adt7310_show_fault_queue(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	int ret;
 
 	ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config);
@@ -493,7 +492,7 @@ static ssize_t adt7310_set_fault_queue(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 	u8 config;
@@ -523,7 +522,7 @@ static inline ssize_t adt7310_show_t_bound(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	u16 data;
 	int ret;
 
@@ -541,7 +540,7 @@ static inline ssize_t adt7310_set_t_bound(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	long tmp1, tmp2;
 	u16 data;
 	char *pos;
@@ -661,7 +660,7 @@ static ssize_t adt7310_show_t_hyst(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	int ret;
 	u8 t_hyst;
 
@@ -678,7 +677,7 @@ static inline ssize_t adt7310_set_t_hyst(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7310_chip_info *chip = dev_info->dev_data;
+	struct adt7310_chip_info *chip = iio_priv(dev_info);
 	int ret;
 	unsigned long data;
 	u8 t_hyst;
@@ -760,33 +759,28 @@ static const struct iio_info adt7310_info = {
 static int __devinit adt7310_probe(struct spi_device *spi_dev)
 {
 	struct adt7310_chip_info *chip;
+	struct iio_dev *indio_dev;
 	int ret = 0;
 	unsigned long *adt7310_platform_data = spi_dev->dev.platform_data;
 	unsigned long irq_flags;
 
-	chip = kzalloc(sizeof(struct adt7310_chip_info), GFP_KERNEL);
-
-	if (chip == NULL)
-		return -ENOMEM;
-
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
-	dev_set_drvdata(&spi_dev->dev, chip);
+	dev_set_drvdata(&spi_dev->dev, indio_dev);
 
 	chip->spi_dev = spi_dev;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
-
-	chip->indio_dev->dev.parent = &spi_dev->dev;
-	chip->indio_dev->name = spi_get_device_id(spi_dev)->name;
-	chip->indio_dev->info = &adt7310_info;
-	chip->indio_dev->dev_data = (void *)chip;
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->dev.parent = &spi_dev->dev;
+	indio_dev->name = spi_get_device_id(spi_dev)->name;
+	indio_dev->info = &adt7310_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -800,8 +794,8 @@ static int __devinit adt7310_probe(struct spi_device *spi_dev)
 					   NULL,
 					   &adt7310_event_handler,
 					   irq_flags,
-					   chip->indio_dev->name,
-					   chip->indio_dev);
+					   indio_dev->name,
+					   indio_dev);
 		if (ret)
 			goto error_unreg_dev;
 	}
@@ -812,8 +806,8 @@ static int __devinit adt7310_probe(struct spi_device *spi_dev)
 					   NULL,
 					   &adt7310_event_handler,
 					   adt7310_platform_data[1],
-					   chip->indio_dev->name,
-					   chip->indio_dev);
+					   indio_dev->name,
+					   indio_dev);
 		if (ret)
 			goto error_unreg_ct_irq;
 	}
@@ -841,38 +835,34 @@ static int __devinit adt7310_probe(struct spi_device *spi_dev)
 	}
 
 	dev_info(&spi_dev->dev, "%s temperature sensor registered.\n",
-			chip->indio_dev->name);
+			indio_dev->name);
 
 	return 0;
 
 error_unreg_int_irq:
-	free_irq(adt7310_platform_data[0], chip->indio_dev);
+	free_irq(adt7310_platform_data[0], indio_dev);
 error_unreg_ct_irq:
-	free_irq(spi_dev->irq, chip->indio_dev);
+	free_irq(spi_dev->irq, indio_dev);
 error_unreg_dev:
-	iio_device_unregister(chip->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_dev:
-	iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
-
+	iio_free_device(indio_dev);
+error_ret:
 	return ret;
 }
 
 static int __devexit adt7310_remove(struct spi_device *spi_dev)
 {
-	struct adt7310_chip_info *chip = dev_get_drvdata(&spi_dev->dev);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev);
 	unsigned long *adt7310_platform_data = spi_dev->dev.platform_data;
 
 	dev_set_drvdata(&spi_dev->dev, NULL);
 	if (adt7310_platform_data[0])
-		free_irq(adt7310_platform_data[0], chip->indio_dev);
+		free_irq(adt7310_platform_data[0], indio_dev);
 	if (spi_dev->irq)
-		free_irq(spi_dev->irq, chip->indio_dev);
+		free_irq(spi_dev->irq, indio_dev);
 	iio_device_unregister(indio_dev);
-	iio_free_device(chip->indio_dev);
-	kfree(chip);
+	iio_free_device(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/adt7410.c b/drivers/staging/iio/adc/adt7410.c
index c40a84f..76aa063 100644
--- a/drivers/staging/iio/adc/adt7410.c
+++ b/drivers/staging/iio/adc/adt7410.c
@@ -75,7 +75,6 @@
 
 struct adt7410_chip_info {
 	struct i2c_client *client;
-	struct iio_dev *indio_dev;
 	u8  config;
 };
 
@@ -144,7 +143,7 @@ static ssize_t adt7410_show_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	u8 config;
 
 	config = chip->config & ADT7410_MODE_MASK;
@@ -167,7 +166,7 @@ static ssize_t adt7410_store_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	u16 config;
 	int ret;
 
@@ -211,7 +210,7 @@ static ssize_t adt7410_show_resolution(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	int ret;
 	int bits;
 
@@ -233,7 +232,7 @@ static ssize_t adt7410_store_resolution(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	u16 config;
 	int ret;
@@ -269,7 +268,7 @@ static ssize_t adt7410_show_id(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	u8 id;
 	int ret;
 
@@ -319,7 +318,7 @@ static ssize_t adt7410_show_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	u8 status;
 	u16 data;
 	int ret, i = 0;
@@ -358,7 +357,7 @@ static const struct attribute_group adt7410_attribute_group = {
 static irqreturn_t adt7410_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
-	struct adt7410_chip_info *chip = iio_dev_get_devdata(indio_dev);
+	struct adt7410_chip_info *chip = iio_priv(indio_dev);
 	s64 timestamp = iio_get_time_ns();
 	u8 status;
 
@@ -392,7 +391,7 @@ static ssize_t adt7410_show_event_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	int ret;
 
 	ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
@@ -411,7 +410,7 @@ static ssize_t adt7410_set_event_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	u16 config;
 	int ret;
 
@@ -444,7 +443,7 @@ static ssize_t adt7410_show_fault_queue(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	int ret;
 
 	ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
@@ -460,7 +459,7 @@ static ssize_t adt7410_set_fault_queue(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 	u8 config;
@@ -490,7 +489,7 @@ static inline ssize_t adt7410_show_t_bound(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	u16 data;
 	int ret;
 
@@ -508,7 +507,7 @@ static inline ssize_t adt7410_set_t_bound(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	long tmp1, tmp2;
 	u16 data;
 	char *pos;
@@ -628,7 +627,7 @@ static ssize_t adt7410_show_t_hyst(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	int ret;
 	u8 t_hyst;
 
@@ -645,7 +644,7 @@ static inline ssize_t adt7410_set_t_hyst(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7410_chip_info *chip = dev_info->dev_data;
+	struct adt7410_chip_info *chip = iio_priv(dev_info);
 	int ret;
 	unsigned long data;
 	u8 t_hyst;
@@ -728,31 +727,27 @@ static int __devinit adt7410_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	struct adt7410_chip_info *chip;
+	struct iio_dev *indio_dev;
 	int ret = 0;
 	unsigned long *adt7410_platform_data = client->dev.platform_data;
 
-	chip = kzalloc(sizeof(struct adt7410_chip_info), GFP_KERNEL);
-
-	if (chip == NULL)
-		return -ENOMEM;
-
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
-	i2c_set_clientdata(client, chip);
+	i2c_set_clientdata(client, indio_dev);
 
 	chip->client = client;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
-	chip->indio_dev->name = id->name;
-	chip->indio_dev->dev.parent = &client->dev;
-	chip->indio_dev->info = &adt7410_info;
-	chip->indio_dev->dev_data = (void *)chip;
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &adt7410_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -763,7 +758,7 @@ static int __devinit adt7410_probe(struct i2c_client *client,
 					   &adt7410_event_handler,
 					   IRQF_TRIGGER_LOW,
 					   id->name,
-					   chip->indio_dev);
+					   indio_dev);
 		if (ret)
 			goto error_unreg_dev;
 	}
@@ -775,7 +770,7 @@ static int __devinit adt7410_probe(struct i2c_client *client,
 					   &adt7410_event_handler,
 					   adt7410_platform_data[1],
 					   id->name,
-					   chip->indio_dev);
+					   indio_dev);
 		if (ret)
 			goto error_unreg_ct_irq;
 	}
@@ -809,32 +804,27 @@ static int __devinit adt7410_probe(struct i2c_client *client,
 	return 0;
 
 error_unreg_int_irq:
-	free_irq(adt7410_platform_data[0], chip->indio_dev);
+	free_irq(adt7410_platform_data[0], indio_dev);
 error_unreg_ct_irq:
-	free_irq(client->irq, chip->indio_dev);
+	free_irq(client->irq, indio_dev);
 error_unreg_dev:
-	iio_device_unregister(chip->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_dev:
-	iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
-
+	iio_free_device(indio_dev);
+error_ret:
 	return ret;
 }
 
 static int __devexit adt7410_remove(struct i2c_client *client)
 {
-	struct adt7410_chip_info *chip = i2c_get_clientdata(client);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 	unsigned long *adt7410_platform_data = client->dev.platform_data;
 
 	if (adt7410_platform_data[0])
-		free_irq(adt7410_platform_data[0], chip->indio_dev);
+		free_irq(adt7410_platform_data[0], indio_dev);
 	if (client->irq)
-		free_irq(client->irq, chip->indio_dev);
+		free_irq(client->irq, indio_dev);
 	iio_device_unregister(indio_dev);
-	iio_free_device(chip->indio_dev);
-	kfree(chip);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/adt75.c b/drivers/staging/iio/adc/adt75.c
index 1171fb9..38f141d 100644
--- a/drivers/staging/iio/adc/adt75.c
+++ b/drivers/staging/iio/adc/adt75.c
@@ -51,7 +51,6 @@
 
 struct adt75_chip_info {
 	struct i2c_client *client;
-	struct iio_dev *indio_dev;
 	u8  config;
 };
 
@@ -59,8 +58,9 @@ struct adt75_chip_info {
  * adt75 register access by I2C
  */
 
-static int adt75_i2c_read(struct adt75_chip_info *chip, u8 reg, u8 *data)
+static int adt75_i2c_read(struct iio_dev *dev_info, u8 reg, u8 *data)
 {
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	struct i2c_client *client = chip->client;
 	int ret = 0, len;
 
@@ -84,8 +84,9 @@ static int adt75_i2c_read(struct adt75_chip_info *chip, u8 reg, u8 *data)
 	return ret;
 }
 
-static int adt75_i2c_write(struct adt75_chip_info *chip, u8 reg, u8 data)
+static int adt75_i2c_write(struct iio_dev *dev_info, u8 reg, u8 data)
 {
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	struct i2c_client *client = chip->client;
 	int ret = 0;
 
@@ -104,8 +105,7 @@ static ssize_t adt75_show_mode(struct device *dev,
 		struct device_attribute *attr,
 		char *buf)
 {
-	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_get_drvdata(dev));
 
 	if (chip->config & ADT75_PD)
 		return sprintf(buf, "power-save\n");
@@ -119,11 +119,11 @@ static ssize_t adt75_store_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	int ret;
 	u8 config;
 
-	ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
 	if (ret)
 		return -EIO;
 
@@ -131,7 +131,7 @@ static ssize_t adt75_store_mode(struct device *dev,
 	if (!strcmp(buf, "full"))
 		config |= ADT75_PD;
 
-	ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
 	if (ret)
 		return -EIO;
 
@@ -158,8 +158,7 @@ static ssize_t adt75_show_oneshot(struct device *dev,
 		struct device_attribute *attr,
 		char *buf)
 {
-	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_get_drvdata(dev));
 
 	return sprintf(buf, "%d\n", !!(chip->config & ADT75_ONESHOT));
 }
@@ -170,7 +169,7 @@ static ssize_t adt75_store_oneshot(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	unsigned long data = 0;
 	int ret;
 	u8 config;
@@ -180,7 +179,7 @@ static ssize_t adt75_store_oneshot(struct device *dev,
 		return -EINVAL;
 
 
-	ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
 	if (ret)
 		return -EIO;
 
@@ -188,7 +187,7 @@ static ssize_t adt75_store_oneshot(struct device *dev,
 	if (data)
 		config |= ADT75_ONESHOT;
 
-	ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
 	if (ret)
 		return -EIO;
 
@@ -207,7 +206,7 @@ static ssize_t adt75_show_value(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	u16 data;
 	char sign = ' ';
 	int ret;
@@ -224,7 +223,7 @@ static ssize_t adt75_show_value(struct device *dev,
 			return -EIO;
 	}
 
-	ret = adt75_i2c_read(chip, ADT75_TEMPERATURE, (u8 *)&data);
+	ret = adt75_i2c_read(dev_info, ADT75_TEMPERATURE, (u8 *)&data);
 	if (ret)
 		return -EIO;
 
@@ -277,11 +276,11 @@ static ssize_t adt75_show_oti_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	int ret;
 
 	/* retrive ALART status */
-	ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
 	if (ret)
 		return -EIO;
 
@@ -297,12 +296,12 @@ static ssize_t adt75_set_oti_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	int ret;
 	u8 config;
 
 	/* retrive ALART status */
-	ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
 	if (ret)
 		return -EIO;
 
@@ -310,7 +309,7 @@ static ssize_t adt75_set_oti_mode(struct device *dev,
 	if (strcmp(buf, "comparator") != 0)
 		config |= ADT75_OS_INT;
 
-	ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
 	if (ret)
 		return -EIO;
 
@@ -331,11 +330,11 @@ static ssize_t adt75_show_smbus_alart(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	int ret;
 
 	/* retrive ALART status */
-	ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
 	if (ret)
 		return -EIO;
 
@@ -348,7 +347,7 @@ static ssize_t adt75_set_smbus_alart(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	unsigned long data = 0;
 	int ret;
 	u8 config;
@@ -358,7 +357,7 @@ static ssize_t adt75_set_smbus_alart(struct device *dev,
 		return -EINVAL;
 
 	/* retrive ALART status */
-	ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
 	if (ret)
 		return -EIO;
 
@@ -366,7 +365,7 @@ static ssize_t adt75_set_smbus_alart(struct device *dev,
 	if (data)
 		config |= ADT75_SMBUS_ALART;
 
-	ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
 	if (ret)
 		return -EIO;
 
@@ -380,11 +379,11 @@ static ssize_t adt75_show_fault_queue(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	int ret;
 
 	/* retrive ALART status */
-	ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
 	if (ret)
 		return -EIO;
 
@@ -398,7 +397,7 @@ static ssize_t adt75_set_fault_queue(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
+	struct adt75_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 	u8 config;
@@ -408,13 +407,13 @@ static ssize_t adt75_set_fault_queue(struct device *dev,
 		return -EINVAL;
 
 	/* retrive ALART status */
-	ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
 	if (ret)
 		return -EIO;
 
 	config = chip->config & ~ADT75_FAULT_QUEUE_MASK;
 	config |= (data << ADT75_FAULT_QUEUE_OFFSET);
-	ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
 	if (ret)
 		return -EIO;
 
@@ -428,12 +427,11 @@ static inline ssize_t adt75_show_t_bound(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
 	u16 data;
 	char sign = ' ';
 	int ret;
 
-	ret = adt75_i2c_read(chip, this_attr->address, (u8 *)&data);
+	ret = adt75_i2c_read(dev_info, this_attr->address, (u8 *)&data);
 	if (ret)
 		return -EIO;
 
@@ -456,7 +454,6 @@ static inline ssize_t adt75_set_t_bound(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt75_chip_info *chip = dev_info->dev_data;
 	long tmp1, tmp2;
 	u16 data;
 	char *pos;
@@ -491,7 +488,7 @@ static inline ssize_t adt75_set_t_bound(struct device *dev,
 	data <<= ADT75_VALUE_OFFSET;
 	data = swab16(data);
 
-	ret = adt75_i2c_write(chip, this_attr->address, (u8)data);
+	ret = adt75_i2c_write(dev_info, this_attr->address, (u8)data);
 	if (ret)
 		return -EIO;
 
@@ -549,31 +546,27 @@ static int __devinit adt75_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	struct adt75_chip_info *chip;
+	struct iio_dev *indio_dev;
 	int ret = 0;
 
-	chip = kzalloc(sizeof(struct adt75_chip_info), GFP_KERNEL);
-
-	if (chip == NULL)
-		return -ENOMEM;
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	chip = iio_priv(indio_dev);
 
 	/* this is only used for device removal purposes */
-	i2c_set_clientdata(client, chip);
+	i2c_set_clientdata(client, indio_dev);
 
 	chip->client = client;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
-
-	chip->indio_dev->name = id->name;
-	chip->indio_dev->dev.parent = &client->dev;
-	chip->indio_dev->info = &adt75_info;
-	chip->indio_dev->dev_data = (void *)chip;
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &adt75_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -582,12 +575,12 @@ static int __devinit adt75_probe(struct i2c_client *client,
 					   NULL,
 					   &adt75_event_handler,
 					   IRQF_TRIGGER_LOW,
-					   chip->indio_dev->name,
-					   chip->indio_dev);
+					   indio_dev->name,
+					   indio_dev);
 		if (ret)
 			goto error_unreg_dev;
 
-		ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+		ret = adt75_i2c_read(indio_dev, ADT75_CONFIG, &chip->config);
 		if (ret) {
 			ret = -EIO;
 			goto error_unreg_irq;
@@ -596,7 +589,7 @@ static int __devinit adt75_probe(struct i2c_client *client,
 		/* set irq polarity low level */
 		chip->config &= ~ADT75_OS_POLARITY;
 
-		ret = adt75_i2c_write(chip, ADT75_CONFIG, chip->config);
+		ret = adt75_i2c_write(indio_dev, ADT75_CONFIG, chip->config);
 		if (ret) {
 			ret = -EIO;
 			goto error_unreg_irq;
@@ -604,31 +597,27 @@ static int __devinit adt75_probe(struct i2c_client *client,
 	}
 
 	dev_info(&client->dev, "%s temperature sensor registered.\n",
-			 chip->indio_dev->name);
+			 indio_dev->name);
 
 	return 0;
 error_unreg_irq:
-	free_irq(client->irq, chip->indio_dev);
+	free_irq(client->irq, indio_dev);
 error_unreg_dev:
-	iio_device_unregister(chip->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_dev:
-	iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
-
+	iio_free_device(indio_dev);
+error_ret:
 	return ret;
 }
 
 static int __devexit adt75_remove(struct i2c_client *client)
 {
-	struct adt75_chip_info *chip = i2c_get_clientdata(client);
-	struct iio_dev *indio_dev = chip->indio_dev;
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 
 	if (client->irq)
-		free_irq(client->irq, chip->indio_dev);
+		free_irq(client->irq, indio_dev);
 	iio_device_unregister(indio_dev);
-	iio_free_device(chip->indio_dev);
-	kfree(chip);
+	iio_free_device(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/adc/max1363_core.c b/drivers/staging/iio/adc/max1363_core.c
index 98cebd2..72b0917 100644
--- a/drivers/staging/iio/adc/max1363_core.c
+++ b/drivers/staging/iio/adc/max1363_core.c
@@ -1255,12 +1255,15 @@ static int __devinit max1363_probe(struct i2c_client *client,
 	struct regulator *reg;
 
 	reg = regulator_get(&client->dev, "vcc");
-	if (!IS_ERR(reg)) {
-		ret = regulator_enable(reg);
-		if (ret)
-			goto error_put_reg;
+	if (IS_ERR(reg)) {
+		ret = PTR_ERR(reg);
+		goto error_out;
 	}
 
+	ret = regulator_enable(reg);
+	if (ret)
+		goto error_put_reg;
+
 	indio_dev = iio_allocate_device(sizeof(struct max1363_state));
 	if (indio_dev == NULL) {
 		ret = -ENOMEM;
@@ -1323,6 +1326,7 @@ static int __devinit max1363_probe(struct i2c_client *client,
 	}
 
 	return 0;
+
 error_uninit_ring:
 	iio_ring_buffer_unregister(indio_dev->ring);
 error_cleanup_ring:
@@ -1335,12 +1339,10 @@ error_free_device:
 	else
 		iio_device_unregister(indio_dev);
 error_disable_reg:
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
+	regulator_disable(reg);
 error_put_reg:
-	if (!IS_ERR(st->reg))
-		regulator_put(st->reg);
-
+	regulator_put(reg);
+error_out:
 	return ret;
 }
 
diff --git a/drivers/staging/iio/addac/adt7316.c b/drivers/staging/iio/addac/adt7316.c
index 7097deb..637316f 100644
--- a/drivers/staging/iio/addac/adt7316.c
+++ b/drivers/staging/iio/addac/adt7316.c
@@ -174,7 +174,6 @@
  */
 
 struct adt7316_chip_info {
-	struct iio_dev		*indio_dev;
 	struct adt7316_bus	bus;
 	u16			ldac_pin;
 	u16			int_mask;	/* 0x2f */
@@ -220,7 +219,7 @@ static ssize_t adt7316_show_enabled(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", !!(chip->config1 & ADT7316_EN));
 }
@@ -252,7 +251,7 @@ static ssize_t adt7316_store_enabled(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	int enable;
 
 	if (!memcmp(buf, "1", 1))
@@ -276,7 +275,7 @@ static ssize_t adt7316_show_select_ex_temp(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
 		return -EPERM;
@@ -290,7 +289,7 @@ static ssize_t adt7316_store_select_ex_temp(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config1;
 	int ret;
 
@@ -320,7 +319,7 @@ static ssize_t adt7316_show_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if (chip->config2 & ADT7316_AD_SINGLE_CH_MODE)
 		return sprintf(buf, "single_channel\n");
@@ -334,7 +333,7 @@ static ssize_t adt7316_store_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config2;
 	int ret;
 
@@ -370,7 +369,7 @@ static ssize_t adt7316_show_ad_channel(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if (!(chip->config2 & ADT7316_AD_SINGLE_CH_MODE))
 		return -EPERM;
@@ -409,7 +408,7 @@ static ssize_t adt7316_store_ad_channel(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config2;
 	unsigned long data = 0;
 	int ret;
@@ -455,7 +454,7 @@ static ssize_t adt7316_show_all_ad_channels(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if (!(chip->config2 & ADT7316_AD_SINGLE_CH_MODE))
 		return -EPERM;
@@ -477,7 +476,7 @@ static ssize_t adt7316_show_disable_averaging(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n",
 		!!(chip->config2 & ADT7316_DISABLE_AVERAGING));
@@ -489,7 +488,7 @@ static ssize_t adt7316_store_disable_averaging(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config2;
 	int ret;
 
@@ -516,7 +515,7 @@ static ssize_t adt7316_show_enable_smbus_timeout(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n",
 		!!(chip->config2 & ADT7316_EN_SMBUS_TIMEOUT));
@@ -528,7 +527,7 @@ static ssize_t adt7316_store_enable_smbus_timeout(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config2;
 	int ret;
 
@@ -557,7 +556,7 @@ static ssize_t adt7316_store_reset(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config2;
 	int ret;
 
@@ -580,7 +579,7 @@ static ssize_t adt7316_show_powerdown(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", !!(chip->config1 & ADT7316_PD));
 }
@@ -591,7 +590,7 @@ static ssize_t adt7316_store_powerdown(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config1;
 	int ret;
 
@@ -618,7 +617,7 @@ static ssize_t adt7316_show_fast_ad_clock(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", !!(chip->config3 & ADT7316_ADCLK_22_5));
 }
@@ -629,7 +628,7 @@ static ssize_t adt7316_store_fast_ad_clock(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config3;
 	int ret;
 
@@ -656,7 +655,7 @@ static ssize_t adt7316_show_da_high_resolution(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if (chip->config3 & ADT7316_DA_HIGH_RESOLUTION) {
 		if (chip->id == ID_ADT7316 || chip->id == ID_ADT7516)
@@ -674,7 +673,7 @@ static ssize_t adt7316_store_da_high_resolution(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config3;
 	int ret;
 
@@ -708,7 +707,7 @@ static ssize_t adt7316_show_AIN_internal_Vref(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
 		return -EPERM;
@@ -723,7 +722,7 @@ static ssize_t adt7316_store_AIN_internal_Vref(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config3;
 	int ret;
 
@@ -755,7 +754,7 @@ static ssize_t adt7316_show_enable_prop_DACA(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n",
 		!!(chip->config3 & ADT7316_EN_IN_TEMP_PROP_DACA));
@@ -767,7 +766,7 @@ static ssize_t adt7316_store_enable_prop_DACA(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config3;
 	int ret;
 
@@ -794,7 +793,7 @@ static ssize_t adt7316_show_enable_prop_DACB(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n",
 		!!(chip->config3 & ADT7316_EN_EX_TEMP_PROP_DACB));
@@ -806,7 +805,7 @@ static ssize_t adt7316_store_enable_prop_DACB(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config3;
 	int ret;
 
@@ -833,7 +832,7 @@ static ssize_t adt7316_show_DAC_2Vref_ch_mask(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%x\n",
 		chip->dac_config & ADT7316_DA_2VREF_CH_MASK);
@@ -845,7 +844,7 @@ static ssize_t adt7316_store_DAC_2Vref_ch_mask(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 dac_config;
 	unsigned long data = 0;
 	int ret;
@@ -876,7 +875,7 @@ static ssize_t adt7316_show_DAC_update_mode(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if (!(chip->config3 & ADT7316_DA_EN_VIA_DAC_LDCA))
 		return sprintf(buf, "manual\n");
@@ -900,7 +899,7 @@ static ssize_t adt7316_store_DAC_update_mode(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 dac_config;
 	unsigned long data;
 	int ret;
@@ -934,7 +933,7 @@ static ssize_t adt7316_show_all_DAC_update_modes(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if (chip->config3 & ADT7316_DA_EN_VIA_DAC_LDCA)
 		return sprintf(buf, "0 - auto at any MSB DAC writing\n"
@@ -955,7 +954,7 @@ static ssize_t adt7316_store_update_DAC(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 ldac_config;
 	unsigned long data;
 	int ret;
@@ -994,7 +993,7 @@ static ssize_t adt7316_show_DA_AB_Vref_bypass(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
 		return -EPERM;
@@ -1009,7 +1008,7 @@ static ssize_t adt7316_store_DA_AB_Vref_bypass(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 dac_config;
 	int ret;
 
@@ -1039,7 +1038,7 @@ static ssize_t adt7316_show_DA_CD_Vref_bypass(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
 		return -EPERM;
@@ -1054,7 +1053,7 @@ static ssize_t adt7316_store_DA_CD_Vref_bypass(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 dac_config;
 	int ret;
 
@@ -1084,7 +1083,7 @@ static ssize_t adt7316_show_DAC_internal_Vref(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
 		return sprintf(buf, "0x%x\n",
@@ -1101,7 +1100,7 @@ static ssize_t adt7316_store_DAC_internal_Vref(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 ldac_config;
 	unsigned long data;
 	int ret;
@@ -1220,7 +1219,7 @@ static ssize_t adt7316_show_VDD(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_ad(chip, ADT7316_AD_SINGLE_CH_VDD, buf);
 }
@@ -1231,7 +1230,7 @@ static ssize_t adt7316_show_in_temp(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_ad(chip, ADT7316_AD_SINGLE_CH_IN, buf);
 }
@@ -1243,7 +1242,7 @@ static ssize_t adt7316_show_ex_temp_AIN1(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_ad(chip, ADT7316_AD_SINGLE_CH_EX, buf);
 }
@@ -1256,7 +1255,7 @@ static ssize_t adt7316_show_AIN2(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_ad(chip, ADT7516_AD_SINGLE_CH_AIN2, buf);
 }
@@ -1267,7 +1266,7 @@ static ssize_t adt7316_show_AIN3(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_ad(chip, ADT7516_AD_SINGLE_CH_AIN3, buf);
 }
@@ -1278,7 +1277,7 @@ static ssize_t adt7316_show_AIN4(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_ad(chip, ADT7516_AD_SINGLE_CH_AIN4, buf);
 }
@@ -1330,7 +1329,7 @@ static ssize_t adt7316_show_in_temp_offset(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_temp_offset(chip, ADT7316_IN_TEMP_OFFSET, buf);
 }
@@ -1341,7 +1340,7 @@ static ssize_t adt7316_store_in_temp_offset(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_store_temp_offset(chip, ADT7316_IN_TEMP_OFFSET, buf, len);
 }
@@ -1355,7 +1354,7 @@ static ssize_t adt7316_show_ex_temp_offset(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_temp_offset(chip, ADT7316_EX_TEMP_OFFSET, buf);
 }
@@ -1366,7 +1365,7 @@ static ssize_t adt7316_store_ex_temp_offset(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_store_temp_offset(chip, ADT7316_EX_TEMP_OFFSET, buf, len);
 }
@@ -1380,7 +1379,7 @@ static ssize_t adt7316_show_in_analog_temp_offset(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_temp_offset(chip,
 			ADT7316_IN_ANALOG_TEMP_OFFSET, buf);
@@ -1392,7 +1391,7 @@ static ssize_t adt7316_store_in_analog_temp_offset(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_store_temp_offset(chip,
 			ADT7316_IN_ANALOG_TEMP_OFFSET, buf, len);
@@ -1407,7 +1406,7 @@ static ssize_t adt7316_show_ex_analog_temp_offset(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_temp_offset(chip,
 			ADT7316_EX_ANALOG_TEMP_OFFSET, buf);
@@ -1419,7 +1418,7 @@ static ssize_t adt7316_store_ex_analog_temp_offset(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_store_temp_offset(chip,
 			ADT7316_EX_ANALOG_TEMP_OFFSET, buf, len);
@@ -1504,7 +1503,7 @@ static ssize_t adt7316_show_DAC_A(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_DAC(chip, 0, buf);
 }
@@ -1515,7 +1514,7 @@ static ssize_t adt7316_store_DAC_A(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_store_DAC(chip, 0, buf, len);
 }
@@ -1528,7 +1527,7 @@ static ssize_t adt7316_show_DAC_B(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_DAC(chip, 1, buf);
 }
@@ -1539,7 +1538,7 @@ static ssize_t adt7316_store_DAC_B(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_store_DAC(chip, 1, buf, len);
 }
@@ -1552,7 +1551,7 @@ static ssize_t adt7316_show_DAC_C(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_DAC(chip, 2, buf);
 }
@@ -1563,7 +1562,7 @@ static ssize_t adt7316_store_DAC_C(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_store_DAC(chip, 2, buf, len);
 }
@@ -1576,7 +1575,7 @@ static ssize_t adt7316_show_DAC_D(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_show_DAC(chip, 3, buf);
 }
@@ -1587,7 +1586,7 @@ static ssize_t adt7316_store_DAC_D(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return adt7316_store_DAC(chip, 3, buf, len);
 }
@@ -1600,7 +1599,7 @@ static ssize_t adt7316_show_device_id(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 id;
 	int ret;
 
@@ -1618,7 +1617,7 @@ static ssize_t adt7316_show_manufactorer_id(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 id;
 	int ret;
 
@@ -1637,7 +1636,7 @@ static ssize_t adt7316_show_device_rev(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 rev;
 	int ret;
 
@@ -1655,7 +1654,7 @@ static ssize_t adt7316_show_bus_type(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 stat;
 	int ret;
 
@@ -1765,7 +1764,7 @@ static const struct attribute_group adt7516_attribute_group = {
 static irqreturn_t adt7316_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
-	struct adt7316_chip_info *chip = iio_dev_get_devdata(indio_dev);
+	struct adt7316_chip_info *chip = iio_priv(indio_dev);
 	u8 stat1, stat2;
 	int ret;
 	s64 time;
@@ -1777,43 +1776,43 @@ static irqreturn_t adt7316_event_handler(int irq, void *private)
 
 		time = iio_get_time_ns();
 		if (stat1 & (1 << 0))
-			iio_push_event(chip->indio_dev, 0,
+			iio_push_event(indio_dev, 0,
 				       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_RISING),
 				       time);
 		if (stat1 & (1 << 1))
-			iio_push_event(chip->indio_dev, 0,
+			iio_push_event(indio_dev, 0,
 				       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_FALLING),
 				       time);
 		if (stat1 & (1 << 2))
-			iio_push_event(chip->indio_dev, 0,
+			iio_push_event(indio_dev, 0,
 				       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 1,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_RISING),
 				       time);
 		if (stat1 & (1 << 3))
-			iio_push_event(chip->indio_dev, 0,
+			iio_push_event(indio_dev, 0,
 				       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 1,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_FALLING),
 				       time);
 		if (stat1 & (1 << 5))
-			iio_push_event(chip->indio_dev, 0,
+			iio_push_event(indio_dev, 0,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN, 1,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_EITHER),
 				       time);
 		if (stat1 & (1 << 6))
-			iio_push_event(chip->indio_dev, 0,
+			iio_push_event(indio_dev, 0,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN, 2,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_EITHER),
 				       time);
 		if (stat1 & (1 << 7))
-			iio_push_event(chip->indio_dev, 0,
+			iio_push_event(indio_dev, 0,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN, 3,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_EITHER),
@@ -1822,7 +1821,7 @@ static irqreturn_t adt7316_event_handler(int irq, void *private)
 	ret = chip->bus.read(chip->bus.client, ADT7316_INT_STAT2, &stat2);
 	if (!ret) {
 		if (stat2 & ADT7316_INT_MASK2_VDD)
-			iio_push_event(chip->indio_dev, 0,
+			iio_push_event(indio_dev, 0,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN,
 							    0,
 							    IIO_EV_TYPE_THRESH,
@@ -1841,7 +1840,7 @@ static ssize_t adt7316_show_int_mask(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "0x%x\n", chip->int_mask);
 }
@@ -1855,7 +1854,7 @@ static ssize_t adt7316_set_int_mask(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	unsigned long data;
 	int ret;
 	u8 mask;
@@ -1895,7 +1894,7 @@ static inline ssize_t adt7316_show_ad_bound(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 val;
 	int data;
 	int ret;
@@ -1926,7 +1925,7 @@ static inline ssize_t adt7316_set_ad_bound(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	long data;
 	u8 val;
 	int ret;
@@ -1965,7 +1964,7 @@ static ssize_t adt7316_show_int_enabled(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", !!(chip->config1 & ADT7316_INT_EN));
 }
@@ -1976,7 +1975,7 @@ static ssize_t adt7316_set_int_enabled(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 	u8 config1;
 	int ret;
 
@@ -2090,7 +2089,7 @@ static struct attribute_group adt7516_event_attribute_group = {
 int adt7316_disable(struct device *dev)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return _adt7316_store_enabled(chip, 0);
 }
@@ -2099,7 +2098,7 @@ EXPORT_SYMBOL(adt7316_disable);
 int adt7316_enable(struct device *dev)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct adt7316_chip_info *chip = iio_priv(dev_info);
 
 	return _adt7316_store_enabled(chip, 1);
 }
@@ -2127,16 +2126,18 @@ int __devinit adt7316_probe(struct device *dev, struct adt7316_bus *bus,
 		const char *name)
 {
 	struct adt7316_chip_info *chip;
+	struct iio_dev *indio_dev;
 	unsigned short *adt7316_platform_data = dev->platform_data;
 	int ret = 0;
 
-	chip = kzalloc(sizeof(struct adt7316_chip_info), GFP_KERNEL);
-
-	if (chip == NULL)
-		return -ENOMEM;
-
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
-	dev_set_drvdata(dev, chip);
+	dev_set_drvdata(dev, indio_dev);
 
 	chip->bus = *bus;
 
@@ -2157,22 +2158,15 @@ int __devinit adt7316_probe(struct device *dev, struct adt7316_bus *bus,
 	if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
 		chip->int_mask |= ADT7516_AIN_INT_MASK;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (chip->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_chip;
-	}
-
-	chip->indio_dev->dev.parent = dev;
+	indio_dev->dev.parent = dev;
 	if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
-		chip->indio_dev->info = &adt7516_info;
+		indio_dev->info = &adt7516_info;
 	else
-		chip->indio_dev->info = &adt7316_info;
-	chip->indio_dev->name = name;
-	chip->indio_dev->dev_data = (void *)chip;
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
+		indio_dev->info = &adt7316_info;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(chip->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -2184,8 +2178,8 @@ int __devinit adt7316_probe(struct device *dev, struct adt7316_bus *bus,
 					   NULL,
 					   &adt7316_event_handler,
 					   chip->bus.irq_flags | IRQF_ONESHOT,
-					   chip->indio_dev->name,
-					   chip->indio_dev);
+					   indio_dev->name,
+					   indio_dev);
 		if (ret)
 			goto error_unreg_dev;
 
@@ -2206,35 +2200,31 @@ int __devinit adt7316_probe(struct device *dev, struct adt7316_bus *bus,
 	}
 
 	dev_info(dev, "%s temperature sensor, ADC and DAC registered.\n",
-			chip->indio_dev->name);
+			indio_dev->name);
 
 	return 0;
 
 error_unreg_irq:
-	free_irq(chip->bus.irq, chip->indio_dev);
+	free_irq(chip->bus.irq, indio_dev);
 error_unreg_dev:
-	iio_device_unregister(chip->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_dev:
-	iio_free_device(chip->indio_dev);
-error_free_chip:
-	kfree(chip);
-
+	iio_free_device(indio_dev);
+error_ret:
 	return ret;
 }
 EXPORT_SYMBOL(adt7316_probe);
 
 int __devexit adt7316_remove(struct device *dev)
 {
-
-	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct adt7316_chip_info *chip = dev_info->dev_data;
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct adt7316_chip_info *chip = iio_priv(indio_dev);
 
 	dev_set_drvdata(dev, NULL);
 	if (chip->bus.irq)
-		free_irq(chip->bus.irq, chip->indio_dev);
-	iio_device_unregister(chip->indio_dev);
-	iio_free_device(chip->indio_dev);
-	kfree(chip);
+		free_irq(chip->bus.irq, indio_dev);
+	iio_device_unregister(indio_dev);
+	iio_free_device(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/dac/Kconfig b/drivers/staging/iio/dac/Kconfig
index d5a5556..7ddae35 100644
--- a/drivers/staging/iio/dac/Kconfig
+++ b/drivers/staging/iio/dac/Kconfig
@@ -42,6 +42,17 @@ config AD5791
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad5791.
 
+config AD5686
+	tristate "Analog Devices AD5686R/AD5685R/AD5684R DAC SPI driver"
+	depends on SPI
+	help
+	  Say yes here to build support for Analog Devices AD5686R, AD5685R,
+	  AD5684R, AD5791 Voltage Output Digital to
+	  Analog Converter.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad5686.
+
 config MAX517
 	tristate "Maxim MAX517/518/519 DAC driver"
 	depends on I2C && EXPERIMENTAL
diff --git a/drivers/staging/iio/dac/Makefile b/drivers/staging/iio/dac/Makefile
index 83196de..7f4f2ed 100644
--- a/drivers/staging/iio/dac/Makefile
+++ b/drivers/staging/iio/dac/Makefile
@@ -6,4 +6,5 @@ obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o
 obj-$(CONFIG_AD5504) += ad5504.o
 obj-$(CONFIG_AD5446) += ad5446.o
 obj-$(CONFIG_AD5791) += ad5791.o
+obj-$(CONFIG_AD5686) += ad5686.o
 obj-$(CONFIG_MAX517) += max517.o
diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c
index 86cb08c..e8a9d0b 100644
--- a/drivers/staging/iio/dac/ad5446.c
+++ b/drivers/staging/iio/dac/ad5446.c
@@ -68,7 +68,7 @@ static ssize_t ad5446_write(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad5446_state *st = dev_info->dev_data;
+	struct ad5446_state *st = iio_priv(dev_info);
 	int ret;
 	long val;
 
@@ -98,7 +98,7 @@ static ssize_t ad5446_show_scale(struct device *dev,
 				char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad5446_state *st = iio_dev_get_devdata(dev_info);
+	struct ad5446_state *st = iio_priv(dev_info);
 	/* Corresponds to Vref / 2^(bits) */
 	unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
 
@@ -111,7 +111,7 @@ static ssize_t ad5446_write_powerdown_mode(struct device *dev,
 				       const char *buf, size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad5446_state *st = dev_info->dev_data;
+	struct ad5446_state *st = iio_priv(dev_info);
 
 	if (sysfs_streq(buf, "1kohm_to_gnd"))
 		st->pwr_down_mode = MODE_PWRDWN_1k;
@@ -129,7 +129,7 @@ static ssize_t ad5446_read_powerdown_mode(struct device *dev,
 				      struct device_attribute *attr, char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad5446_state *st = dev_info->dev_data;
+	struct ad5446_state *st = iio_priv(dev_info);
 
 	char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
 
@@ -141,7 +141,7 @@ static ssize_t ad5446_read_dac_powerdown(struct device *dev,
 					   char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad5446_state *st = dev_info->dev_data;
+	struct ad5446_state *st = iio_priv(dev_info);
 
 	return sprintf(buf, "%d\n", st->pwr_down);
 }
@@ -151,7 +151,7 @@ static ssize_t ad5446_write_dac_powerdown(struct device *dev,
 					    const char *buf, size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad5446_state *st = dev_info->dev_data;
+	struct ad5446_state *st = iio_priv(dev_info);
 	unsigned long readin;
 	int ret;
 
@@ -201,7 +201,7 @@ static mode_t ad5446_attr_is_visible(struct kobject *kobj,
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad5446_state *st = iio_dev_get_devdata(dev_info);
+	struct ad5446_state *st = iio_priv(dev_info);
 
 	mode_t mode = attr->mode;
 
@@ -342,42 +342,37 @@ static const struct iio_info ad5446_info = {
 static int __devinit ad5446_probe(struct spi_device *spi)
 {
 	struct ad5446_state *st;
+	struct iio_dev *indio_dev;
+	struct regulator *reg;
 	int ret, voltage_uv = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-
-	st->reg = regulator_get(&spi->dev, "vcc");
-	if (!IS_ERR(st->reg)) {
-		ret = regulator_enable(st->reg);
+	reg = regulator_get(&spi->dev, "vcc");
+	if (!IS_ERR(reg)) {
+		ret = regulator_enable(reg);
 		if (ret)
 			goto error_put_reg;
 
-		voltage_uv = regulator_get_voltage(st->reg);
+		voltage_uv = regulator_get_voltage(reg);
 	}
 
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_disable_reg;
+	}
+	st = iio_priv(indio_dev);
 	st->chip_info =
 		&ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data];
 
-	spi_set_drvdata(spi, st);
-
+	spi_set_drvdata(spi, indio_dev);
+	st->reg = reg;
 	st->spi = spi;
 
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_disable_reg;
-	}
-
 	/* Estabilish that the iio_dev is a child of the spi device */
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->name = spi_get_device_id(spi)->name;
-	st->indio_dev->info = &ad5446_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->info = &ad5446_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	/* Setup default message */
 
@@ -404,36 +399,35 @@ static int __devinit ad5446_probe(struct spi_device *spi)
 				 "reference voltage unspecified\n");
 	}
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_device;
 
 	return 0;
 
 error_free_device:
-	iio_free_device(st->indio_dev);
+	iio_free_device(indio_dev);
 error_disable_reg:
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
+	if (!IS_ERR(reg))
+		regulator_disable(reg);
 error_put_reg:
-	if (!IS_ERR(st->reg))
-		regulator_put(st->reg);
-	kfree(st);
-error_ret:
+	if (!IS_ERR(reg))
+		regulator_put(reg);
+
 	return ret;
 }
 
 static int ad5446_remove(struct spi_device *spi)
 {
-	struct ad5446_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad5446_state *st = iio_priv(indio_dev);
+	struct regulator *reg = st->reg;
 
 	iio_device_unregister(indio_dev);
-	if (!IS_ERR(st->reg)) {
-		regulator_disable(st->reg);
-		regulator_put(st->reg);
+	if (!IS_ERR(reg)) {
+		regulator_disable(reg);
+		regulator_put(reg);
 	}
-	kfree(st);
 	return 0;
 }
 
diff --git a/drivers/staging/iio/dac/ad5446.h b/drivers/staging/iio/dac/ad5446.h
index e6ffd2b..7118d65 100644
--- a/drivers/staging/iio/dac/ad5446.h
+++ b/drivers/staging/iio/dac/ad5446.h
@@ -33,7 +33,6 @@
 
 /**
  * struct ad5446_state - driver instance specific data
- * @indio_dev:		the industrial I/O device
  * @spi:		spi_device
  * @chip_info:		chip model specific constants, available modes etc
  * @reg:		supply regulator
@@ -45,7 +44,6 @@
  */
 
 struct ad5446_state {
-	struct iio_dev			*indio_dev;
 	struct spi_device		*spi;
 	const struct ad5446_chip_info	*chip_info;
 	struct regulator		*reg;
diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c
index ed029cd..1915f45 100644
--- a/drivers/staging/iio/dac/ad5504.c
+++ b/drivers/staging/iio/dac/ad5504.c
@@ -55,7 +55,7 @@ static ssize_t ad5504_write_dac(struct device *dev,
 				 const char *buf, size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5504_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5504_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	long readin;
 	int ret;
@@ -73,7 +73,7 @@ static ssize_t ad5504_read_dac(struct device *dev,
 					   char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5504_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5504_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int ret;
 	u16 val;
@@ -89,7 +89,7 @@ static ssize_t ad5504_read_powerdown_mode(struct device *dev,
 				      struct device_attribute *attr, char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5504_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5504_state *st = iio_priv(indio_dev);
 
 	const char mode[][14] = {"20kohm_to_gnd", "three_state"};
 
@@ -101,7 +101,7 @@ static ssize_t ad5504_write_powerdown_mode(struct device *dev,
 				       const char *buf, size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5504_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5504_state *st = iio_priv(indio_dev);
 	int ret;
 
 	if (sysfs_streq(buf, "20kohm_to_gnd"))
@@ -119,7 +119,7 @@ static ssize_t ad5504_read_dac_powerdown(struct device *dev,
 					   char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5504_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5504_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	return sprintf(buf, "%d\n",
@@ -133,7 +133,7 @@ static ssize_t ad5504_write_dac_powerdown(struct device *dev,
 	long readin;
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5504_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5504_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	ret = strict_strtol(buf, 10, &readin);
@@ -162,7 +162,7 @@ static ssize_t ad5504_show_scale(struct device *dev,
 				char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5504_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5504_state *st = iio_priv(indio_dev);
 	/* Corresponds to Vref / 2^(bits) */
 	unsigned int scale_uv = (st->vref_mv * 1000) >> AD5505_BITS;
 
@@ -277,26 +277,27 @@ static const struct iio_info ad5501_info = {
 static int __devinit ad5504_probe(struct spi_device *spi)
 {
 	struct ad5504_platform_data *pdata = spi->dev.platform_data;
+	struct iio_dev *indio_dev;
 	struct ad5504_state *st;
+	struct regulator *reg;
 	int ret, voltage_uv = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-
-	spi_set_drvdata(spi, st);
-
-	st->reg = regulator_get(&spi->dev, "vcc");
-	if (!IS_ERR(st->reg)) {
-		ret = regulator_enable(st->reg);
+	reg = regulator_get(&spi->dev, "vcc");
+	if (!IS_ERR(reg)) {
+		ret = regulator_enable(reg);
 		if (ret)
 			goto error_put_reg;
 
-		voltage_uv = regulator_get_voltage(st->reg);
+		voltage_uv = regulator_get_voltage(reg);
 	}
 
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_disable_reg;
+	}
+	spi_set_drvdata(spi, indio_dev);
+	st = iio_priv(indio_dev);
 	if (voltage_uv)
 		st->vref_mv = voltage_uv / 1000;
 	else if (pdata)
@@ -304,22 +305,17 @@ static int __devinit ad5504_probe(struct spi_device *spi)
 	else
 		dev_warn(&spi->dev, "reference voltage unspecified\n");
 
+	st->reg = reg;
 	st->spi = spi;
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_disable_reg;
-	}
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->name = spi_get_device_id(st->spi)->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(st->spi)->name;
 	if (spi_get_device_id(st->spi)->driver_data == ID_AD5501)
-		st->indio_dev->info = &ad5501_info;
+		indio_dev->info = &ad5501_info;
 	else
-		st->indio_dev->info = &ad5504_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+		indio_dev->info = &ad5504_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -329,7 +325,7 @@ static int __devinit ad5504_probe(struct spi_device *spi)
 					   &ad5504_event_handler,
 					   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 					   spi_get_device_id(st->spi)->name,
-					   st->indio_dev);
+					   indio_dev);
 		if (ret)
 			goto error_unreg_iio_device;
 	}
@@ -337,37 +333,34 @@ static int __devinit ad5504_probe(struct spi_device *spi)
 	return 0;
 
 error_unreg_iio_device:
-	iio_device_unregister(st->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_dev:
-	iio_free_device(st->indio_dev);
+	iio_free_device(indio_dev);
 error_disable_reg:
-	if (!IS_ERR(st->reg))
+	if (!IS_ERR(reg))
 		regulator_disable(st->reg);
 error_put_reg:
-	if (!IS_ERR(st->reg))
-		regulator_put(st->reg);
+	if (!IS_ERR(reg))
+		regulator_put(reg);
 
-	kfree(st);
-error_ret:
 	return ret;
 }
 
 static int __devexit ad5504_remove(struct spi_device *spi)
 {
-	struct ad5504_state *st = spi_get_drvdata(spi);
-
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad5504_state *st = iio_priv(indio_dev);
+	struct regulator *reg = st->reg;
 	if (spi->irq)
-		free_irq(spi->irq, st->indio_dev);
+		free_irq(spi->irq, indio_dev);
 
-	iio_device_unregister(st->indio_dev);
+	iio_device_unregister(indio_dev);
 
-	if (!IS_ERR(st->reg)) {
-		regulator_disable(st->reg);
-		regulator_put(st->reg);
+	if (!IS_ERR(reg)) {
+		regulator_disable(reg);
+		regulator_put(reg);
 	}
 
-	kfree(st);
-
 	return 0;
 }
 
diff --git a/drivers/staging/iio/dac/ad5504.h b/drivers/staging/iio/dac/ad5504.h
index 13ef353..85beb1d 100644
--- a/drivers/staging/iio/dac/ad5504.h
+++ b/drivers/staging/iio/dac/ad5504.h
@@ -41,7 +41,6 @@ struct ad5504_platform_data {
 
 /**
  * struct ad5446_state - driver instance specific data
- * @indio_dev:		the industrial I/O device
  * @us:			spi_device
  * @reg:		supply regulator
  * @vref_mv:		actual reference voltage used
@@ -50,7 +49,6 @@ struct ad5504_platform_data {
  */
 
 struct ad5504_state {
-	struct iio_dev			*indio_dev;
 	struct spi_device		*spi;
 	struct regulator		*reg;
 	unsigned short			vref_mv;
diff --git a/drivers/staging/iio/dac/ad5624r.h b/drivers/staging/iio/dac/ad5624r.h
index c16df4e..b71c6a0 100644
--- a/drivers/staging/iio/dac/ad5624r.h
+++ b/drivers/staging/iio/dac/ad5624r.h
@@ -53,7 +53,6 @@ struct ad5624r_chip_info {
  */
 
 struct ad5624r_state {
-	struct iio_dev			*indio_dev;
 	struct spi_device		*us;
 	const struct ad5624r_chip_info	*chip_info;
 	struct regulator		*reg;
diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c
index c679981..a5b3776 100644
--- a/drivers/staging/iio/dac/ad5624r_spi.c
+++ b/drivers/staging/iio/dac/ad5624r_spi.c
@@ -77,7 +77,7 @@ static ssize_t ad5624r_write_dac(struct device *dev,
 	long readin;
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5624r_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	ret = strict_strtol(buf, 10, &readin);
@@ -94,7 +94,7 @@ static ssize_t ad5624r_read_powerdown_mode(struct device *dev,
 				      struct device_attribute *attr, char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5624r_state *st = iio_priv(indio_dev);
 
 	char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
 
@@ -106,7 +106,7 @@ static ssize_t ad5624r_write_powerdown_mode(struct device *dev,
 				       const char *buf, size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5624r_state *st = iio_priv(indio_dev);
 	int ret;
 
 	if (sysfs_streq(buf, "1kohm_to_gnd"))
@@ -126,7 +126,7 @@ static ssize_t ad5624r_read_dac_powerdown(struct device *dev,
 					   char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5624r_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	return sprintf(buf, "%d\n",
@@ -140,7 +140,7 @@ static ssize_t ad5624r_write_dac_powerdown(struct device *dev,
 	long readin;
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5624r_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	ret = strict_strtol(buf, 10, &readin);
@@ -166,7 +166,7 @@ static ssize_t ad5624r_show_scale(struct device *dev,
 				char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5624r_state *st = iio_priv(indio_dev);
 	/* Corresponds to Vref / 2^(bits) */
 	unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
 
@@ -226,24 +226,26 @@ static const struct iio_info ad5624r_info = {
 static int __devinit ad5624r_probe(struct spi_device *spi)
 {
 	struct ad5624r_state *st;
+	struct iio_dev *indio_dev;
+	struct regulator *reg;
 	int ret, voltage_uv = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	spi_set_drvdata(spi, st);
-
-	st->reg = regulator_get(&spi->dev, "vcc");
-	if (!IS_ERR(st->reg)) {
-		ret = regulator_enable(st->reg);
+	reg = regulator_get(&spi->dev, "vcc");
+	if (!IS_ERR(reg)) {
+		ret = regulator_enable(reg);
 		if (ret)
 			goto error_put_reg;
 
-		voltage_uv = regulator_get_voltage(st->reg);
+		voltage_uv = regulator_get_voltage(reg);
 	}
-
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_disable_reg;
+	}
+	st = iio_priv(indio_dev);
+	st->reg = reg;
+	spi_set_drvdata(spi, indio_dev);
 	st->chip_info =
 		&ad5624r_chip_info_tbl[spi_get_device_id(spi)->driver_data];
 
@@ -253,18 +255,13 @@ static int __devinit ad5624r_probe(struct spi_device *spi)
 		st->vref_mv = st->chip_info->int_vref_mv;
 
 	st->us = spi;
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_disable_reg;
-	}
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->name = spi_get_device_id(spi)->name;
-	st->indio_dev->info = &ad5624r_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->info = &ad5624r_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -276,32 +273,29 @@ static int __devinit ad5624r_probe(struct spi_device *spi)
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->indio_dev);
+	iio_free_device(indio_dev);
 error_disable_reg:
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
+	if (!IS_ERR(reg))
+		regulator_disable(reg);
 error_put_reg:
-	if (!IS_ERR(st->reg))
-		regulator_put(st->reg);
+	if (!IS_ERR(reg))
+		regulator_put(reg);
 
-	kfree(st);
-error_ret:
 	return ret;
 }
 
 static int __devexit ad5624r_remove(struct spi_device *spi)
 {
-	struct ad5624r_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->indio_dev);
-
-	if (!IS_ERR(st->reg)) {
-		regulator_disable(st->reg);
-		regulator_put(st->reg);
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad5624r_state *st = iio_priv(indio_dev);
+	struct regulator *reg = st->reg;
+
+	iio_device_unregister(indio_dev);
+	if (!IS_ERR(reg)) {
+		regulator_disable(reg);
+		regulator_put(reg);
 	}
 
-	kfree(st);
-
 	return 0;
 }
 
diff --git a/drivers/staging/iio/dac/ad5686.c b/drivers/staging/iio/dac/ad5686.c
new file mode 100644
index 0000000..fd67cfa
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5686.c
@@ -0,0 +1,497 @@
+/*
+ * AD5686R, AD5685R, AD5684R Digital to analog converters  driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/fs.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/regulator/consumer.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+#include "dac.h"
+
+#define AD5686_DAC_CHANNELS			4
+
+#define AD5686_ADDR(x)				((x) << 16)
+#define AD5686_CMD(x)				((x) << 20)
+
+#define AD5686_ADDR_DAC0			0x1
+#define AD5686_ADDR_DAC1			0x2
+#define AD5686_ADDR_DAC2			0x4
+#define AD5686_ADDR_DAC3			0x8
+#define AD5686_ADDR_ALL_DAC			0xF
+
+#define AD5686_CMD_NOOP				0x0
+#define AD5686_CMD_WRITE_INPUT_N		0x1
+#define AD5686_CMD_UPDATE_DAC_N			0x2
+#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N	0x3
+#define AD5686_CMD_POWERDOWN_DAC		0x4
+#define AD5686_CMD_LDAC_MASK			0x5
+#define AD5686_CMD_RESET			0x6
+#define AD5686_CMD_INTERNAL_REFER_SETUP		0x7
+#define AD5686_CMD_DAISY_CHAIN_ENABLE		0x8
+#define AD5686_CMD_READBACK_ENABLE		0x9
+
+#define AD5686_LDAC_PWRDN_NONE			0x0
+#define AD5686_LDAC_PWRDN_1K			0x1
+#define AD5686_LDAC_PWRDN_100K			0x2
+#define AD5686_LDAC_PWRDN_3STATE		0x3
+
+/**
+ * struct ad5686_chip_info - chip specific information
+ * @int_vref_mv:	AD5620/40/60: the internal reference voltage
+ * @channel:		channel specification
+*/
+
+struct ad5686_chip_info {
+	u16				int_vref_mv;
+	struct iio_chan_spec		channel[AD5686_DAC_CHANNELS];
+};
+
+/**
+ * struct ad5446_state - driver instance specific data
+ * @spi:		spi_device
+ * @chip_info:		chip model specific constants, available modes etc
+ * @reg:		supply regulator
+ * @vref_mv:		actual reference voltage used
+ * @pwr_down_mask:	power down mask
+ * @pwr_down_mode:	current power down mode
+ * @data:		spi transfer buffers
+ */
+
+struct ad5686_state {
+	struct spi_device		*spi;
+	const struct ad5686_chip_info	*chip_info;
+	struct regulator		*reg;
+	unsigned short			vref_mv;
+	unsigned			pwr_down_mask;
+	unsigned			pwr_down_mode;
+	/*
+	 * DMA (thus cache coherency maintenance) requires the
+	 * transfer buffers to live in their own cache lines.
+	 */
+
+	union {
+		u32 d32;
+		u8 d8[4];
+	} data[3] ____cacheline_aligned;
+};
+
+/**
+ * ad5686_supported_device_ids:
+ */
+
+enum ad5686_supported_device_ids {
+	ID_AD5684,
+	ID_AD5685,
+	ID_AD5686,
+};
+
+static const struct ad5686_chip_info ad5686_chip_info_tbl[] = {
+	[ID_AD5684] = {
+		.channel[0] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC0,
+				    0, IIO_ST('u', 12, 16, 4), 0),
+		.channel[1] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 1, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC1,
+				    1, IIO_ST('u', 12, 16, 4), 0),
+		.channel[2] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 2, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC2,
+				    2, IIO_ST('u', 12, 16, 4), 0),
+		.channel[3] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 3, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC3,
+				    3, IIO_ST('u', 12, 16, 4), 0),
+		.int_vref_mv = 2500,
+	},
+	[ID_AD5685] = {
+		.channel[0] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC0,
+				    0, IIO_ST('u', 14, 16, 2), 0),
+		.channel[1] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 1, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC1,
+				    1, IIO_ST('u', 14, 16, 2), 0),
+		.channel[2] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 2, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC2,
+				    2, IIO_ST('u', 14, 16, 2), 0),
+		.channel[3] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 3, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC3,
+				    3, IIO_ST('u', 14, 16, 2), 0),
+		.int_vref_mv = 2500,
+	},
+	[ID_AD5686] = {
+		.channel[0] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 0, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC0,
+				    0, IIO_ST('u', 16, 16, 0), 0),
+		.channel[1] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 1, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC1,
+				    1, IIO_ST('u', 16, 16, 0), 0),
+		.channel[2] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 2, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC2,
+				    2, IIO_ST('u', 16, 16, 0), 0),
+		.channel[3] = IIO_CHAN(IIO_OUT, 0, 1, 0, NULL, 3, 0,
+				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    AD5686_ADDR_DAC3,
+				    3, IIO_ST('u', 16, 16, 0), 0),
+		.int_vref_mv = 2500,
+	},
+};
+
+static int ad5686_spi_write(struct ad5686_state *st,
+			     u8 cmd, u8 addr, u16 val, u8 shift)
+{
+	val <<= shift;
+
+	st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
+			      AD5686_ADDR(addr) |
+			      val);
+
+	return spi_write(st->spi, &st->data[0].d8[1], 3);
+}
+
+static int ad5686_spi_read(struct ad5686_state *st, u8 addr)
+{
+	struct spi_transfer t[] = {
+		{
+			.tx_buf = &st->data[0].d8[1],
+			.len = 3,
+			.cs_change = 1,
+		}, {
+			.tx_buf = &st->data[1].d8[1],
+			.rx_buf = &st->data[2].d8[1],
+			.len = 3,
+		},
+	};
+	struct spi_message m;
+	int ret;
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t[0], &m);
+	spi_message_add_tail(&t[1], &m);
+
+	st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) |
+			      AD5686_ADDR(addr));
+	st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));
+
+	ret = spi_sync(st->spi, &m);
+	if (ret < 0)
+		return ret;
+
+	return be32_to_cpu(st->data[2].d32);
+}
+
+static ssize_t ad5686_read_powerdown_mode(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5686_state *st = iio_priv(indio_dev);
+	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+
+	char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
+
+	return sprintf(buf, "%s\n", mode[(st->pwr_down_mode >>
+					 (this_attr->address * 2)) & 0x3]);
+}
+
+static ssize_t ad5686_write_powerdown_mode(struct device *dev,
+				       struct device_attribute *attr,
+				       const char *buf, size_t len)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5686_state *st = iio_priv(indio_dev);
+	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+	unsigned mode;
+
+	if (sysfs_streq(buf, "1kohm_to_gnd"))
+		mode = AD5686_LDAC_PWRDN_1K;
+	else if (sysfs_streq(buf, "100kohm_to_gnd"))
+		mode = AD5686_LDAC_PWRDN_100K;
+	else if (sysfs_streq(buf, "three_state"))
+		mode = AD5686_LDAC_PWRDN_3STATE;
+	else
+		return  -EINVAL;
+
+	st->pwr_down_mode &= ~(0x3 << (this_attr->address * 2));
+	st->pwr_down_mode |= (mode << (this_attr->address * 2));
+
+	return len;
+}
+
+static ssize_t ad5686_read_dac_powerdown(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5686_state *st = iio_priv(indio_dev);
+	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+
+	return sprintf(buf, "%d\n", !!(st->pwr_down_mask &
+			(0x3 << (this_attr->address * 2))));
+}
+
+static ssize_t ad5686_write_dac_powerdown(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t len)
+{
+	bool readin;
+	int ret;
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5686_state *st = iio_priv(indio_dev);
+	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+
+	ret = strtobool(buf, &readin);
+	if (ret)
+		return ret;
+
+	if (readin == true)
+		st->pwr_down_mask |= (0x3 << (this_attr->address * 2));
+	else
+		st->pwr_down_mask &= ~(0x3 << (this_attr->address * 2));
+
+	ret = ad5686_spi_write(st, AD5686_CMD_POWERDOWN_DAC, 0,
+			       st->pwr_down_mask & st->pwr_down_mode, 0);
+
+	return ret ? ret : len;
+}
+
+static IIO_CONST_ATTR(out_powerdown_mode_available,
+			"1kohm_to_gnd 100kohm_to_gnd three_state");
+
+#define IIO_DEV_ATTR_DAC_POWERDOWN_MODE(_num) \
+	IIO_DEVICE_ATTR(out##_num##_powerdown_mode, S_IRUGO | S_IWUSR,	\
+			ad5686_read_powerdown_mode,			\
+			ad5686_write_powerdown_mode, _num)
+
+static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(0);
+static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(1);
+static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(2);
+static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(3);
+
+#define IIO_DEV_ATTR_DAC_POWERDOWN(_num)	\
+	IIO_DEVICE_ATTR(out##_num##_powerdown, S_IRUGO | S_IWUSR,	\
+			ad5686_read_dac_powerdown,			\
+			ad5686_write_dac_powerdown, _num)
+
+static IIO_DEV_ATTR_DAC_POWERDOWN(0);
+static IIO_DEV_ATTR_DAC_POWERDOWN(1);
+static IIO_DEV_ATTR_DAC_POWERDOWN(2);
+static IIO_DEV_ATTR_DAC_POWERDOWN(3);
+
+static struct attribute *ad5686_attributes[] = {
+	&iio_dev_attr_out0_powerdown.dev_attr.attr,
+	&iio_dev_attr_out1_powerdown.dev_attr.attr,
+	&iio_dev_attr_out2_powerdown.dev_attr.attr,
+	&iio_dev_attr_out3_powerdown.dev_attr.attr,
+	&iio_dev_attr_out0_powerdown_mode.dev_attr.attr,
+	&iio_dev_attr_out1_powerdown_mode.dev_attr.attr,
+	&iio_dev_attr_out2_powerdown_mode.dev_attr.attr,
+	&iio_dev_attr_out3_powerdown_mode.dev_attr.attr,
+	&iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group ad5686_attribute_group = {
+	.attrs = ad5686_attributes,
+};
+
+static int ad5686_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val,
+			   int *val2,
+			   long m)
+{
+	struct ad5686_state *st = iio_priv(indio_dev);
+	unsigned long scale_uv;
+	int ret;
+
+	switch (m) {
+	case 0:
+		mutex_lock(&indio_dev->mlock);
+		ret = ad5686_spi_read(st, chan->address);
+		mutex_unlock(&indio_dev->mlock);
+		if (ret < 0)
+			return ret;
+		*val = ret;
+		return IIO_VAL_INT;
+		break;
+	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+		scale_uv = (st->vref_mv * 100000)
+			>> (chan->scan_type.realbits);
+		*val =  scale_uv / 100000;
+		*val2 = (scale_uv % 100000) * 10;
+		return IIO_VAL_INT_PLUS_MICRO;
+
+	}
+	return -EINVAL;
+}
+
+static int ad5686_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct ad5686_state *st = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case 0:
+		if (val > (1 << chan->scan_type.realbits))
+			return -EINVAL;
+
+		mutex_lock(&indio_dev->mlock);
+		ret = ad5686_spi_write(st,
+				 AD5686_CMD_WRITE_INPUT_N_UPDATE_N,
+				 chan->address,
+				 val,
+				 chan->scan_type.shift);
+		mutex_unlock(&indio_dev->mlock);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct iio_info ad5686_info = {
+	.read_raw = ad5686_read_raw,
+	.write_raw = ad5686_write_raw,
+	.attrs = &ad5686_attribute_group,
+	.driver_module = THIS_MODULE,
+};
+
+static int __devinit ad5686_probe(struct spi_device *spi)
+{
+	struct ad5686_state *st;
+	struct iio_dev *indio_dev;
+	int ret, regdone = 0, voltage_uv = 0;
+
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL)
+		return  -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
+
+	st->reg = regulator_get(&spi->dev, "vcc");
+	if (!IS_ERR(st->reg)) {
+		ret = regulator_enable(st->reg);
+		if (ret)
+			goto error_put_reg;
+
+		voltage_uv = regulator_get_voltage(st->reg);
+	}
+
+	st->chip_info =
+		&ad5686_chip_info_tbl[spi_get_device_id(spi)->driver_data];
+
+	if (voltage_uv)
+		st->vref_mv = voltage_uv / 1000;
+	else
+		st->vref_mv = st->chip_info->int_vref_mv;
+
+	st->spi = spi;
+
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->info = &ad5686_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = st->chip_info->channel;
+	indio_dev->num_channels = AD5686_DAC_CHANNELS;
+
+	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto error_disable_reg;
+
+	regdone = 1;
+	ret = ad5686_spi_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0,
+				!!voltage_uv, 0);
+	if (ret)
+		goto error_disable_reg;
+
+	return 0;
+
+error_disable_reg:
+	if (!IS_ERR(st->reg))
+		regulator_disable(st->reg);
+error_put_reg:
+	if (!IS_ERR(st->reg))
+		regulator_put(st->reg);
+
+	if (regdone)
+		iio_device_unregister(indio_dev);
+	else
+		iio_free_device(indio_dev);
+
+	return ret;
+}
+
+static int __devexit ad5686_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad5686_state *st = iio_priv(indio_dev);
+	struct regulator *reg = st->reg;
+
+	if (!IS_ERR(reg)) {
+		regulator_disable(reg);
+		regulator_put(reg);
+	}
+
+	iio_device_unregister(indio_dev);
+
+	return 0;
+}
+
+static const struct spi_device_id ad5686_id[] = {
+	{"ad5684", ID_AD5684},
+	{"ad5685", ID_AD5685},
+	{"ad5686", ID_AD5686},
+	{}
+};
+
+static struct spi_driver ad5686_driver = {
+	.driver = {
+		   .name = "ad5686",
+		   .owner = THIS_MODULE,
+		   },
+	.probe = ad5686_probe,
+	.remove = __devexit_p(ad5686_remove),
+	.id_table = ad5686_id,
+};
+
+static __init int ad5686_spi_init(void)
+{
+	return spi_register_driver(&ad5686_driver);
+}
+module_init(ad5686_spi_init);
+
+static __exit void ad5686_spi_exit(void)
+{
+	spi_unregister_driver(&ad5686_driver);
+}
+module_exit(ad5686_spi_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c
index 4eda25c..64770d2 100644
--- a/drivers/staging/iio/dac/ad5791.c
+++ b/drivers/staging/iio/dac/ad5791.c
@@ -76,7 +76,7 @@ static ssize_t ad5791_write_dac(struct device *dev,
 				 const char *buf, size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5791_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	long readin;
 	int ret;
@@ -98,7 +98,7 @@ static ssize_t ad5791_read_dac(struct device *dev,
 					   char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5791_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int ret;
 	int val;
@@ -118,7 +118,7 @@ static ssize_t ad5791_read_powerdown_mode(struct device *dev,
 				      struct device_attribute *attr, char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5791_state *st = iio_priv(indio_dev);
 
 	const char mode[][14] = {"6kohm_to_gnd", "three_state"};
 
@@ -130,7 +130,7 @@ static ssize_t ad5791_write_powerdown_mode(struct device *dev,
 				       const char *buf, size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5791_state *st = iio_priv(indio_dev);
 	int ret;
 
 	if (sysfs_streq(buf, "6kohm_to_gnd"))
@@ -148,7 +148,7 @@ static ssize_t ad5791_read_dac_powerdown(struct device *dev,
 					   char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5791_state *st = iio_priv(indio_dev);
 
 	return sprintf(buf, "%d\n", st->pwr_down);
 }
@@ -160,7 +160,7 @@ static ssize_t ad5791_write_dac_powerdown(struct device *dev,
 	long readin;
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5791_state *st = iio_priv(indio_dev);
 
 	ret = strict_strtol(buf, 10, &readin);
 	if (ret)
@@ -188,7 +188,7 @@ static ssize_t ad5791_show_scale(struct device *dev,
 				char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5791_state *st = iio_priv(indio_dev);
 	/* Corresponds to Vref / 2^(bits) */
 	unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
 
@@ -201,7 +201,7 @@ static ssize_t ad5791_show_name(struct device *dev,
 				 char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
+	struct ad5791_state *st = iio_priv(indio_dev);
 
 	return sprintf(buf, "%s\n", spi_get_device_id(st->spi)->name);
 }
@@ -295,36 +295,39 @@ static const struct iio_info ad5791_info = {
 static int __devinit ad5791_probe(struct spi_device *spi)
 {
 	struct ad5791_platform_data *pdata = spi->dev.platform_data;
+	struct iio_dev *indio_dev;
+	struct regulator *reg_vdd, *reg_vss;
 	struct ad5791_state *st;
 	int ret, pos_voltage_uv = 0, neg_voltage_uv = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-
-	spi_set_drvdata(spi, st);
-
-	st->reg_vdd = regulator_get(&spi->dev, "vdd");
-	if (!IS_ERR(st->reg_vdd)) {
-		ret = regulator_enable(st->reg_vdd);
+	reg_vdd = regulator_get(&spi->dev, "vdd");
+	if (!IS_ERR(reg_vdd)) {
+		ret = regulator_enable(reg_vdd);
 		if (ret)
 			goto error_put_reg_pos;
 
-		pos_voltage_uv = regulator_get_voltage(st->reg_vdd);
+		pos_voltage_uv = regulator_get_voltage(reg_vdd);
 	}
 
-	st->reg_vss = regulator_get(&spi->dev, "vss");
-	if (!IS_ERR(st->reg_vss)) {
-		ret = regulator_enable(st->reg_vss);
+	reg_vss = regulator_get(&spi->dev, "vss");
+	if (!IS_ERR(reg_vss)) {
+		ret = regulator_enable(reg_vss);
 		if (ret)
 			goto error_put_reg_neg;
 
-		neg_voltage_uv = regulator_get_voltage(st->reg_vss);
+		neg_voltage_uv = regulator_get_voltage(reg_vss);
 	}
 
-	if (!IS_ERR(st->reg_vss) && !IS_ERR(st->reg_vdd))
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		goto error_disable_reg_neg;
+	}
+	st = iio_priv(indio_dev);
+	st->pwr_down = true;
+	st->spi = spi;
+
+	if (!IS_ERR(reg_vss) && !IS_ERR(reg_vdd))
 		st->vref_mv = (pos_voltage_uv - neg_voltage_uv) / 1000;
 	else if (pdata)
 		st->vref_mv = pdata->vref_pos_mv - pdata->vref_neg_mv;
@@ -333,7 +336,7 @@ static int __devinit ad5791_probe(struct spi_device *spi)
 
 	ret = ad5791_spi_write(spi, AD5791_ADDR_SW_CTRL, AD5791_SWCTRL_RESET);
 	if (ret)
-		goto error_disable_reg_neg;
+		goto error_free_dev;
 
 	st->chip_info =
 		&ad5791_chip_info_tbl[spi_get_device_id(spi)->driver_data];
@@ -346,66 +349,61 @@ static int __devinit ad5791_probe(struct spi_device *spi)
 	ret = ad5791_spi_write(spi, AD5791_ADDR_CTRL, st->ctrl |
 		AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI);
 	if (ret)
-		goto error_disable_reg_neg;
+		goto error_free_dev;
 
-	st->pwr_down = true;
+	st->reg_vdd = reg_vdd;
+	st->reg_vss = reg_vss;
 
-	st->spi = spi;
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_disable_reg_neg;
-	}
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->info = &ad5791_info;
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	spi_set_drvdata(spi, indio_dev);
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &ad5791_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->indio_dev);
+	iio_free_device(indio_dev);
 
 error_disable_reg_neg:
-	if (!IS_ERR(st->reg_vss))
-		regulator_disable(st->reg_vss);
+	if (!IS_ERR(reg_vss))
+		regulator_disable(reg_vss);
 error_put_reg_neg:
-	if (!IS_ERR(st->reg_vss))
-		regulator_put(st->reg_vss);
+	if (!IS_ERR(reg_vss))
+		regulator_put(reg_vss);
 
-	if (!IS_ERR(st->reg_vdd))
-		regulator_disable(st->reg_vdd);
+	if (!IS_ERR(reg_vdd))
+		regulator_disable(reg_vdd);
 error_put_reg_pos:
-	if (!IS_ERR(st->reg_vdd))
-		regulator_put(st->reg_vdd);
+	if (!IS_ERR(reg_vdd))
+		regulator_put(reg_vdd);
 
-	kfree(st);
 error_ret:
 	return ret;
 }
 
 static int __devexit ad5791_remove(struct spi_device *spi)
 {
-	struct ad5791_state *st = spi_get_drvdata(spi);
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad5791_state *st = iio_priv(indio_dev);
+	struct regulator *reg_vdd = st->reg_vdd;
+	struct regulator *reg_vss = st->reg_vss;
 
-	iio_device_unregister(st->indio_dev);
+	iio_device_unregister(indio_dev);
 
 	if (!IS_ERR(st->reg_vdd)) {
-		regulator_disable(st->reg_vdd);
-		regulator_put(st->reg_vdd);
+		regulator_disable(reg_vdd);
+		regulator_put(reg_vdd);
 	}
 
 	if (!IS_ERR(st->reg_vss)) {
-		regulator_disable(st->reg_vss);
-		regulator_put(st->reg_vss);
+		regulator_disable(reg_vss);
+		regulator_put(reg_vss);
 	}
 
-	kfree(st);
-
 	return 0;
 }
 
diff --git a/drivers/staging/iio/dac/ad5791.h b/drivers/staging/iio/dac/ad5791.h
index f09ad9a..c807f26 100644
--- a/drivers/staging/iio/dac/ad5791.h
+++ b/drivers/staging/iio/dac/ad5791.h
@@ -81,7 +81,6 @@ struct ad5791_chip_info {
 
 /**
  * struct ad5791_state - driver instance specific data
- * @indio_dev:		the industrial I/O device
  * @us:			spi_device
  * @reg_vdd:		positive supply regulator
  * @reg_vss:		negative supply regulator
@@ -91,7 +90,6 @@ struct ad5791_chip_info {
  */
 
 struct ad5791_state {
-	struct iio_dev			*indio_dev;
 	struct spi_device		*spi;
 	struct regulator		*reg_vdd;
 	struct regulator		*reg_vss;
diff --git a/drivers/staging/iio/dac/max517.c b/drivers/staging/iio/dac/max517.c
index 2fe34d2..ed5d351 100644
--- a/drivers/staging/iio/dac/max517.c
+++ b/drivers/staging/iio/dac/max517.c
@@ -59,7 +59,7 @@ static ssize_t max517_set_value(struct device *dev,
 				 const char *buf, size_t count, int channel)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct max517_data *data = iio_dev_get_devdata(dev_info);
+	struct max517_data *data = iio_priv(dev_info);
 	struct i2c_client *client = data->client;
 	u8 outbuf[4]; /* 1x or 2x command + value */
 	int outbuf_size = 0;
@@ -127,7 +127,7 @@ static ssize_t max517_show_scale(struct device *dev,
 				char *buf, int channel)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct max517_data *data = iio_dev_get_devdata(dev_info);
+	struct max517_data *data = iio_priv(dev_info);
 	/* Corresponds to Vref / 2^(bits) */
 	unsigned int scale_uv = (data->vref_mv[channel - 1] * 1000) >> 8;
 
@@ -203,35 +203,28 @@ static int max517_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	struct max517_data *data;
+	struct iio_dev *indio_dev;
 	struct max517_platform_data *platform_data = client->dev.platform_data;
 	int err;
 
-	data = kzalloc(sizeof(struct max517_data), GFP_KERNEL);
-	if (!data) {
+	indio_dev = iio_allocate_device(sizeof(*data));
+	if (indio_dev == NULL) {
 		err = -ENOMEM;
 		goto exit;
 	}
-
-	i2c_set_clientdata(client, data);
-
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
 	data->client = client;
 
-	data->indio_dev = iio_allocate_device(0);
-	if (data->indio_dev == NULL) {
-		err = -ENOMEM;
-		goto exit_free_data;
-	}
-
 	/* establish that the iio_dev is a child of the i2c device */
-	data->indio_dev->dev.parent = &client->dev;
+	indio_dev->dev.parent = &client->dev;
 
 	/* reduced attribute set for MAX517 */
 	if (id->driver_data == ID_MAX517)
-		data->indio_dev->info = &max517_info;
+		indio_dev->info = &max517_info;
 	else
-		data->indio_dev->info = &max518_info;
-	data->indio_dev->dev_data = (void *)(data);
-	data->indio_dev->modes = INDIO_DIRECT_MODE;
+		indio_dev->info = &max518_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	/*
 	 * Reference voltage on MAX518 and default is 5V, else take vref_mv
@@ -244,7 +237,7 @@ static int max517_probe(struct i2c_client *client,
 		data->vref_mv[1] = platform_data->vref_mv[1];
 	}
 
-	err = iio_device_register(data->indio_dev);
+	err = iio_device_register(indio_dev);
 	if (err)
 		goto exit_free_device;
 
@@ -253,19 +246,14 @@ static int max517_probe(struct i2c_client *client,
 	return 0;
 
 exit_free_device:
-	iio_free_device(data->indio_dev);
-exit_free_data:
-	kfree(data);
+	iio_free_device(indio_dev);
 exit:
 	return err;
 }
 
 static int max517_remove(struct i2c_client *client)
 {
-	struct max517_data *data = i2c_get_clientdata(client);
-
-	iio_free_device(data->indio_dev);
-	kfree(data);
+	iio_free_device(i2c_get_clientdata(client));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/dds/ad5930.c b/drivers/staging/iio/dds/ad5930.c
index 490c363..0b2aa4c 100644
--- a/drivers/staging/iio/dds/ad5930.c
+++ b/drivers/staging/iio/dds/ad5930.c
@@ -35,7 +35,6 @@ struct ad5903_config {
 
 struct ad5930_state {
 	struct mutex lock;
-	struct iio_dev *idev;
 	struct spi_device *sdev;
 };
 
@@ -49,7 +48,7 @@ static ssize_t ad5930_set_parameter(struct device *dev,
 	int ret;
 	struct ad5903_config *config = (struct ad5903_config *)buf;
 	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad5930_state *st = idev->dev_data;
+	struct ad5930_state *st = iio_priv(idev);
 
 	config->control = (config->control & ~value_mask);
 	config->incnum = (config->control & ~value_mask) | (1 << addr_shift);
@@ -83,42 +82,35 @@ static struct attribute *ad5930_attributes[] = {
 };
 
 static const struct attribute_group ad5930_attribute_group = {
-	.name = DRV_NAME,
 	.attrs = ad5930_attributes,
 };
 
 static const struct iio_info ad5930_info = {
 	.attrs = &ad5930_attribute_group,
-
 	.driver_module = THIS_MODULE,
 };
 
 static int __devinit ad5930_probe(struct spi_device *spi)
 {
 	struct ad5930_state *st;
+	struct iio_dev *idev;
 	int ret = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	idev = iio_allocate_device(sizeof(*st));
+	if (idev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, idev);
+	st = iio_priv(idev);
 
 	mutex_init(&st->lock);
 	st->sdev = spi;
+	idev->dev.parent = &spi->dev;
+	idev->info = &ad5930_info;
+	idev->modes = INDIO_DIRECT_MODE;
 
-	st->idev = iio_allocate_device(0);
-	if (st->idev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->idev->dev.parent = &spi->dev;
-	st->idev->dev_data = (void *)(st);
-	st->idev->info = &ad5930_info;
-	st->idev->modes = INDIO_DIRECT_MODE;
-
-	ret = iio_device_register(st->idev);
+	ret = iio_device_register(idev);
 	if (ret)
 		goto error_free_dev;
 	spi->max_speed_hz = 2000000;
@@ -129,19 +121,14 @@ static int __devinit ad5930_probe(struct spi_device *spi)
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->idev);
-error_free_st:
-	kfree(st);
+	iio_free_device(idev);
 error_ret:
 	return ret;
 }
 
 static int __devexit ad5930_remove(struct spi_device *spi)
 {
-	struct ad5930_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->idev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/dds/ad9832.c b/drivers/staging/iio/dds/ad9832.c
index e8fe142..e3e61a4 100644
--- a/drivers/staging/iio/dds/ad9832.c
+++ b/drivers/staging/iio/dds/ad9832.c
@@ -77,7 +77,7 @@ static ssize_t ad9832_write(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad9832_state *st = dev_info->dev_data;
+	struct ad9832_state *st = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int ret;
 	long val;
@@ -203,7 +203,9 @@ static const struct iio_info ad9832_info = {
 static int __devinit ad9832_probe(struct spi_device *spi)
 {
 	struct ad9832_platform_data *pdata = spi->dev.platform_data;
+	struct iio_dev *indio_dev;
 	struct ad9832_state *st;
+	struct regulator *reg;
 	int ret;
 
 	if (!pdata) {
@@ -211,35 +213,28 @@ static int __devinit ad9832_probe(struct spi_device *spi)
 		return -ENODEV;
 	}
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-
-	st->reg = regulator_get(&spi->dev, "vcc");
-	if (!IS_ERR(st->reg)) {
-		ret = regulator_enable(st->reg);
+	reg = regulator_get(&spi->dev, "vcc");
+	if (!IS_ERR(reg)) {
+		ret = regulator_enable(reg);
 		if (ret)
 			goto error_put_reg;
 	}
 
-	st->mclk = pdata->mclk;
-
-	spi_set_drvdata(spi, st);
-	st->spi = spi;
-
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_disable_reg;
 	}
+	spi_set_drvdata(spi, indio_dev);
+	st = iio_priv(indio_dev);
+	st->reg = reg;
+	st->mclk = pdata->mclk;
+	st->spi = spi;
 
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->name = spi_get_device_id(spi)->name;
-	st->indio_dev->info = &ad9832_info;
-	st->indio_dev->dev_data = (void *) st;
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->info = &ad9832_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	/* Setup default messages */
 
@@ -310,35 +305,35 @@ static int __devinit ad9832_probe(struct spi_device *spi)
 	if (ret)
 		goto error_free_device;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_device;
 
 	return 0;
 
 error_free_device:
-	iio_free_device(st->indio_dev);
+	iio_free_device(indio_dev);
 error_disable_reg:
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
+	if (!IS_ERR(reg))
+		regulator_disable(reg);
 error_put_reg:
-	if (!IS_ERR(st->reg))
-		regulator_put(st->reg);
-	kfree(st);
-error_ret:
+	if (!IS_ERR(reg))
+		regulator_put(reg);
+
 	return ret;
 }
 
 static int __devexit ad9832_remove(struct spi_device *spi)
 {
-	struct ad9832_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->indio_dev);
-	if (!IS_ERR(st->reg)) {
-		regulator_disable(st->reg);
-		regulator_put(st->reg);
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad9832_state *st = iio_priv(indio_dev);
+	struct regulator *reg = st->reg;
+
+	iio_device_unregister(indio_dev);
+	if (!IS_ERR(reg)) {
+		regulator_disable(reg);
+		regulator_put(reg);
 	}
-	kfree(st);
 	return 0;
 }
 
diff --git a/drivers/staging/iio/dds/ad9832.h b/drivers/staging/iio/dds/ad9832.h
index 5d47454..c5b701f 100644
--- a/drivers/staging/iio/dds/ad9832.h
+++ b/drivers/staging/iio/dds/ad9832.h
@@ -57,7 +57,6 @@
 
 /**
  * struct ad9832_state - driver instance specific data
- * @indio_dev:		the industrial I/O device
  * @spi:		spi_device
  * @reg:		supply regulator
  * @mclk:		external master clock
@@ -76,7 +75,6 @@
  */
 
 struct ad9832_state {
-	struct iio_dev			*indio_dev;
 	struct spi_device		*spi;
 	struct regulator		*reg;
 	unsigned long			mclk;
diff --git a/drivers/staging/iio/dds/ad9834.c b/drivers/staging/iio/dds/ad9834.c
index 0ebe8d5..e6454d5 100644
--- a/drivers/staging/iio/dds/ad9834.c
+++ b/drivers/staging/iio/dds/ad9834.c
@@ -66,7 +66,7 @@ static ssize_t ad9834_write(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad9834_state *st = dev_info->dev_data;
+	struct ad9834_state *st = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int ret;
 	long val;
@@ -145,7 +145,7 @@ static ssize_t ad9834_store_wavetype(struct device *dev,
 				 size_t len)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad9834_state *st = dev_info->dev_data;
+	struct ad9834_state *st = iio_priv(dev_info);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int ret = 0;
 	bool is_ad9833_7 = (st->devid == ID_AD9833) || (st->devid == ID_AD9837);
@@ -203,7 +203,7 @@ static ssize_t ad9834_show_out0_wavetype_available(struct device *dev,
 						char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad9834_state *st = iio_dev_get_devdata(dev_info);
+	struct ad9834_state *st = iio_priv(dev_info);
 	char *str;
 
 	if ((st->devid == ID_AD9833) || (st->devid == ID_AD9837))
@@ -225,7 +225,7 @@ static ssize_t ad9834_show_out1_wavetype_available(struct device *dev,
 						char *buf)
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad9834_state *st = iio_dev_get_devdata(dev_info);
+	struct ad9834_state *st = iio_priv(dev_info);
 	char *str;
 
 	if (st->control & AD9834_MODE)
@@ -285,7 +285,7 @@ static mode_t ad9834_attr_is_visible(struct kobject *kobj,
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad9834_state *st = iio_dev_get_devdata(dev_info);
+	struct ad9834_state *st = iio_priv(dev_info);
 
 	mode_t mode = attr->mode;
 
@@ -314,6 +314,8 @@ static int __devinit ad9834_probe(struct spi_device *spi)
 {
 	struct ad9834_platform_data *pdata = spi->dev.platform_data;
 	struct ad9834_state *st;
+	struct iio_dev *indio_dev;
+	struct regulator *reg;
 	int ret;
 
 	if (!pdata) {
@@ -321,37 +323,28 @@ static int __devinit ad9834_probe(struct spi_device *spi)
 		return -ENODEV;
 	}
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-
-	st->reg = regulator_get(&spi->dev, "vcc");
-	if (!IS_ERR(st->reg)) {
-		ret = regulator_enable(st->reg);
+	reg = regulator_get(&spi->dev, "vcc");
+	if (!IS_ERR(reg)) {
+		ret = regulator_enable(reg);
 		if (ret)
 			goto error_put_reg;
 	}
 
-	st->mclk = pdata->mclk;
-
-	spi_set_drvdata(spi, st);
-
-	st->spi = spi;
-	st->devid = spi_get_device_id(spi)->driver_data;
-
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_disable_reg;
 	}
-
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->name = spi_get_device_id(spi)->name;
-	st->indio_dev->info = &ad9834_info;
-	st->indio_dev->dev_data = (void *) st;
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	spi_set_drvdata(spi, indio_dev);
+	st = iio_priv(indio_dev);
+	st->mclk = pdata->mclk;
+	st->spi = spi;
+	st->devid = spi_get_device_id(spi)->driver_data;
+	st->reg = reg;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->info = &ad9834_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	/* Setup default messages */
 
@@ -402,35 +395,35 @@ static int __devinit ad9834_probe(struct spi_device *spi)
 	if (ret)
 		goto error_free_device;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_device;
 
 	return 0;
 
 error_free_device:
-	iio_free_device(st->indio_dev);
+	iio_free_device(indio_dev);
 error_disable_reg:
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
+	if (!IS_ERR(reg))
+		regulator_disable(reg);
 error_put_reg:
-	if (!IS_ERR(st->reg))
-		regulator_put(st->reg);
-	kfree(st);
-error_ret:
+	if (!IS_ERR(reg))
+		regulator_put(reg);
 	return ret;
 }
 
 static int __devexit ad9834_remove(struct spi_device *spi)
 {
-	struct ad9834_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->indio_dev);
-	if (!IS_ERR(st->reg)) {
-		regulator_disable(st->reg);
-		regulator_put(st->reg);
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad9834_state *st = iio_priv(indio_dev);
+	struct regulator *reg = st->reg;
+
+	iio_device_unregister(indio_dev);
+	if (!IS_ERR(reg)) {
+		regulator_disable(reg);
+		regulator_put(reg);
 	}
-	kfree(st);
+
 	return 0;
 }
 
diff --git a/drivers/staging/iio/dds/ad9834.h b/drivers/staging/iio/dds/ad9834.h
index 2abd635..ed5ed8d 100644
--- a/drivers/staging/iio/dds/ad9834.h
+++ b/drivers/staging/iio/dds/ad9834.h
@@ -38,7 +38,6 @@
 
 /**
  * struct ad9834_state - driver instance specific data
- * @indio_dev:		the industrial I/O device
  * @spi:		spi_device
  * @reg:		supply regulator
  * @mclk:		external master clock
@@ -52,7 +51,6 @@
  */
 
 struct ad9834_state {
-	struct iio_dev			*indio_dev;
 	struct spi_device		*spi;
 	struct regulator		*reg;
 	unsigned int			mclk;
diff --git a/drivers/staging/iio/dds/ad9850.c b/drivers/staging/iio/dds/ad9850.c
index b580d85..d7c9d05 100644
--- a/drivers/staging/iio/dds/ad9850.c
+++ b/drivers/staging/iio/dds/ad9850.c
@@ -30,7 +30,6 @@ struct ad9850_config {
 
 struct ad9850_state {
 	struct mutex lock;
-	struct iio_dev *idev;
 	struct spi_device *sdev;
 };
 
@@ -44,7 +43,7 @@ static ssize_t ad9850_set_parameter(struct device *dev,
 	int ret;
 	struct ad9850_config *config = (struct ad9850_config *)buf;
 	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad9850_state *st = idev->dev_data;
+	struct ad9850_state *st = iio_priv(idev);
 
 	xfer.len = len;
 	xfer.tx_buf = config;
@@ -69,7 +68,6 @@ static struct attribute *ad9850_attributes[] = {
 };
 
 static const struct attribute_group ad9850_attribute_group = {
-	.name = DRV_NAME,
 	.attrs = ad9850_attributes,
 };
 
@@ -81,30 +79,24 @@ static const struct iio_info ad9850_info = {
 static int __devinit ad9850_probe(struct spi_device *spi)
 {
 	struct ad9850_state *st;
+	struct iio_dev *idev;
 	int ret = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	idev = iio_allocate_device(sizeof(*st));
+	if (idev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
-
+	spi_set_drvdata(spi, idev);
+	st = iio_priv(idev);
 	mutex_init(&st->lock);
 	st->sdev = spi;
 
-	st->idev = iio_allocate_device(0);
-	if (st->idev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->idev->dev.parent = &spi->dev;
-
-	st->idev->info = &ad9850_info;
-	st->idev->dev_data = (void *)(st);
-	st->idev->modes = INDIO_DIRECT_MODE;
+	idev->dev.parent = &spi->dev;
+	idev->info = &ad9850_info;
+	idev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->idev);
+	ret = iio_device_register(idev);
 	if (ret)
 		goto error_free_dev;
 	spi->max_speed_hz = 2000000;
@@ -115,19 +107,14 @@ static int __devinit ad9850_probe(struct spi_device *spi)
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->idev);
-error_free_st:
-	kfree(st);
+	iio_free_device(idev);
 error_ret:
 	return ret;
 }
 
 static int __devexit ad9850_remove(struct spi_device *spi)
 {
-	struct ad9850_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->idev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/dds/ad9852.c b/drivers/staging/iio/dds/ad9852.c
index 08020f9..0184585 100644
--- a/drivers/staging/iio/dds/ad9852.c
+++ b/drivers/staging/iio/dds/ad9852.c
@@ -58,7 +58,6 @@ struct ad9852_config {
 
 struct ad9852_state {
 	struct mutex lock;
-	struct iio_dev *idev;
 	struct spi_device *sdev;
 };
 
@@ -72,7 +71,7 @@ static ssize_t ad9852_set_parameter(struct device *dev,
 	int ret;
 	struct ad9852_config *config = (struct ad9852_config *)buf;
 	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad9852_state *st = idev->dev_data;
+	struct ad9852_state *st = iio_priv(idev);
 
 	xfer.len = 3;
 	xfer.tx_buf = &config->phajst0[0];
@@ -230,30 +229,24 @@ static const struct iio_info ad9852_info = {
 static int __devinit ad9852_probe(struct spi_device *spi)
 {
 	struct ad9852_state *st;
+	struct iio_dev *idev;
 	int ret = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	idev = iio_allocate_device(sizeof(*st));
+	if (idev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
-
+	st = iio_priv(idev);
+	spi_set_drvdata(spi, idev);
 	mutex_init(&st->lock);
 	st->sdev = spi;
 
-	st->idev = iio_allocate_device(0);
-	if (st->idev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->idev->dev.parent = &spi->dev;
+	idev->dev.parent = &spi->dev;
+	idev->info = &ad9852_info;
+	idev->modes = INDIO_DIRECT_MODE;
 
-	st->idev->info = &ad9852_info;
-	st->idev->dev_data = (void *)(st);
-	st->idev->modes = INDIO_DIRECT_MODE;
-
-	ret = iio_device_register(st->idev);
+	ret = iio_device_register(idev);
 	if (ret)
 		goto error_free_dev;
 	spi->max_speed_hz = 2000000;
@@ -261,22 +254,19 @@ static int __devinit ad9852_probe(struct spi_device *spi)
 	spi->bits_per_word = 8;
 	spi_setup(spi);
 	ad9852_init(st);
+
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->idev);
-error_free_st:
-	kfree(st);
+	iio_free_device(idev);
+
 error_ret:
 	return ret;
 }
 
 static int __devexit ad9852_remove(struct spi_device *spi)
 {
-	struct ad9852_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->idev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/dds/ad9910.c b/drivers/staging/iio/dds/ad9910.c
index 97d75d7..0fa217f 100644
--- a/drivers/staging/iio/dds/ad9910.c
+++ b/drivers/staging/iio/dds/ad9910.c
@@ -110,7 +110,6 @@ struct ad9910_config {
 
 struct ad9910_state {
 	struct mutex lock;
-	struct iio_dev *idev;
 	struct spi_device *sdev;
 };
 
@@ -124,7 +123,7 @@ static ssize_t ad9910_set_parameter(struct device *dev,
 	int ret;
 	struct ad9910_config *config = (struct ad9910_config *)buf;
 	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad9910_state *st = idev->dev_data;
+	struct ad9910_state *st = iio_priv(idev);
 
 	xfer.len = 5;
 	xfer.tx_buf = &config->auxdac[0];
@@ -365,30 +364,24 @@ static const struct iio_info ad9910_info = {
 static int __devinit ad9910_probe(struct spi_device *spi)
 {
 	struct ad9910_state *st;
+	struct iio_dev *idev;
 	int ret = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	idev = iio_allocate_device(sizeof(*st));
+	if (idev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
-
+	spi_set_drvdata(spi, idev);
+	st = iio_priv(idev);
 	mutex_init(&st->lock);
 	st->sdev = spi;
 
-	st->idev = iio_allocate_device(0);
-	if (st->idev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->idev->dev.parent = &spi->dev;
-
-	st->idev->info = &ad9910_info;
-	st->idev->dev_data = (void *)(st);
-	st->idev->modes = INDIO_DIRECT_MODE;
+	idev->dev.parent = &spi->dev;
+	idev->info = &ad9910_info;
+	idev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->idev);
+	ret = iio_device_register(idev);
 	if (ret)
 		goto error_free_dev;
 	spi->max_speed_hz = 2000000;
@@ -399,19 +392,14 @@ static int __devinit ad9910_probe(struct spi_device *spi)
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->idev);
-error_free_st:
-	kfree(st);
+	iio_free_device(idev);
 error_ret:
 	return ret;
 }
 
 static int __devexit ad9910_remove(struct spi_device *spi)
 {
-	struct ad9910_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->idev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/dds/ad9951.c b/drivers/staging/iio/dds/ad9951.c
index d4dfcd4..d361d1f 100644
--- a/drivers/staging/iio/dds/ad9951.c
+++ b/drivers/staging/iio/dds/ad9951.c
@@ -51,7 +51,6 @@ struct ad9951_config {
 
 struct ad9951_state {
 	struct mutex lock;
-	struct iio_dev *idev;
 	struct spi_device *sdev;
 };
 
@@ -65,7 +64,7 @@ static ssize_t ad9951_set_parameter(struct device *dev,
 	int ret;
 	struct ad9951_config *config = (struct ad9951_config *)buf;
 	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad9951_state *st = idev->dev_data;
+	struct ad9951_state *st = iio_priv(idev);
 
 	xfer.len = 3;
 	xfer.tx_buf = &config->asf[0];
@@ -174,30 +173,25 @@ static const struct iio_info ad9951_info = {
 static int __devinit ad9951_probe(struct spi_device *spi)
 {
 	struct ad9951_state *st;
+	struct iio_dev *idev;
 	int ret = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	idev = iio_allocate_device(sizeof(*st));
+	if (idev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
-
+	spi_set_drvdata(spi, idev);
+	st = iio_priv(idev);
 	mutex_init(&st->lock);
 	st->sdev = spi;
 
-	st->idev = iio_allocate_device(0);
-	if (st->idev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->idev->dev.parent = &spi->dev;
+	idev->dev.parent = &spi->dev;
 
-	st->idev->info = &ad9951_info;
-	st->idev->dev_data = (void *)(st);
-	st->idev->modes = INDIO_DIRECT_MODE;
+	idev->info = &ad9951_info;
+	idev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->idev);
+	ret = iio_device_register(idev);
 	if (ret)
 		goto error_free_dev;
 	spi->max_speed_hz = 2000000;
@@ -208,19 +202,15 @@ static int __devinit ad9951_probe(struct spi_device *spi)
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->idev);
-error_free_st:
-	kfree(st);
+	iio_free_device(idev);
+
 error_ret:
 	return ret;
 }
 
 static int __devexit ad9951_remove(struct spi_device *spi)
 {
-	struct ad9951_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->idev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/gyro/adis16060_core.c b/drivers/staging/iio/gyro/adis16060_core.c
index edf9e3b..afa52d1 100644
--- a/drivers/staging/iio/gyro/adis16060_core.c
+++ b/drivers/staging/iio/gyro/adis16060_core.c
@@ -29,27 +29,25 @@
  * struct adis16060_state - device instance specific data
  * @us_w:		actual spi_device to write config
  * @us_r:		actual spi_device to read back data
- * @indio_dev:		industrial I/O device structure
  * @buf:		transmit or receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct adis16060_state {
 	struct spi_device		*us_w;
 	struct spi_device		*us_r;
-	struct iio_dev			*indio_dev;
 	struct mutex			buf_lock;
 
 	u8 buf[3] ____cacheline_aligned;
 };
 
-static struct adis16060_state *adis16060_st;
+static struct iio_dev *adis16060_iio_dev;
 
 static int adis16060_spi_write(struct device *dev,
 		u8 val)
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16060_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16060_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->buf[2] = val; /* The last 8 bits clocked in are latched */
@@ -64,7 +62,7 @@ static int adis16060_spi_read(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16060_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16060_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 
@@ -141,43 +139,38 @@ static const struct iio_info adis16060_info = {
 static int __devinit adis16060_r_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adis16060_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct adis16060_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
-
+	spi_set_drvdata(spi, indio_dev);
+	st = iio_priv(indio_dev);
 	st->us_r = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
 
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16060_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16060_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	regdone = 1;
 
-	adis16060_st = st;
+	adis16060_iio_dev = indio_dev;
 	return 0;
 
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
@@ -185,11 +178,7 @@ error_ret:
 /* fixme, confirm ordering in this function */
 static int adis16060_r_remove(struct spi_device *spi)
 {
-	struct adis16060_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
-
-	iio_device_unregister(indio_dev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
@@ -197,12 +186,14 @@ static int adis16060_r_remove(struct spi_device *spi)
 static int __devinit adis16060_w_probe(struct spi_device *spi)
 {
 	int ret;
-	struct adis16060_state *st = adis16060_st;
-	if (!st) {
+	struct iio_dev *indio_dev = adis16060_iio_dev;
+	struct adis16060_state *st;
+	if (!indio_dev) {
 		ret =  -ENODEV;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
 	st->us_w = spi;
 	return 0;
 
diff --git a/drivers/staging/iio/gyro/adis16080_core.c b/drivers/staging/iio/gyro/adis16080_core.c
index d42690b..ad2db4d 100644
--- a/drivers/staging/iio/gyro/adis16080_core.c
+++ b/drivers/staging/iio/gyro/adis16080_core.c
@@ -34,13 +34,11 @@
 /**
  * struct adis16080_state - device instance specific data
  * @us:			actual spi_device to write data
- * @indio_dev:		industrial I/O device structure
  * @buf:		transmit or receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct adis16080_state {
 	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
 	struct mutex			buf_lock;
 
 	u8 buf[2] ____cacheline_aligned;
@@ -51,7 +49,7 @@ static int adis16080_spi_write(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16080_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16080_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->buf[0] = val >> 8;
@@ -68,7 +66,7 @@ static int adis16080_spi_read(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16080_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16080_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 
@@ -131,31 +129,29 @@ static const struct iio_info adis16080_info = {
 static int __devinit adis16080_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adis16080_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct adis16080_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
 	/* Allocate the comms buffers */
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
 
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16080_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16080_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	regdone = 1;
@@ -164,11 +160,9 @@ static int __devinit adis16080_probe(struct spi_device *spi)
 
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
@@ -176,11 +170,7 @@ error_ret:
 /* fixme, confirm ordering in this function */
 static int adis16080_remove(struct spi_device *spi)
 {
-	struct adis16080_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
-
-	iio_device_unregister(indio_dev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/gyro/adis16130_core.c b/drivers/staging/iio/gyro/adis16130_core.c
index 14d5a34..c80e908 100644
--- a/drivers/staging/iio/gyro/adis16130_core.c
+++ b/drivers/staging/iio/gyro/adis16130_core.c
@@ -41,14 +41,12 @@
 /**
  * struct adis16130_state - device instance specific data
  * @us:			actual spi_device to write data
- * @indio_dev:		industrial I/O device structure
  * @mode:		24 bits (1) or 16 bits (0)
  * @buf_lock:		mutex to protect tx and rx
  * @buf:		unified tx/rx buffer
  **/
 struct adis16130_state {
 	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
 	u32                             mode;
 	struct mutex			buf_lock;
 	u8				buf[4] ____cacheline_aligned;
@@ -59,7 +57,7 @@ static int adis16130_spi_write(struct device *dev, u8 reg_addr,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16130_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16130_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->buf[0] = reg_addr;
@@ -76,7 +74,7 @@ static int adis16130_spi_read(struct device *dev, u8 reg_addr,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16130_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16130_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 
@@ -125,7 +123,7 @@ static ssize_t adis16130_bitsmode_read(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16130_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16130_state *st = iio_priv(indio_dev);
 
 	if (st->mode == 1)
 		return sprintf(buf, "s24\n");
@@ -183,39 +181,35 @@ static const struct iio_info adis16130_info = {
 static int __devinit adis16130_probe(struct spi_device *spi)
 {
 	int ret;
-	struct adis16130_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct adis16130_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16130_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16130_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 	st->mode = 1;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->indio_dev);
-error_free_st:
-	kfree(st);
+	iio_free_device(indio_dev);
+
 error_ret:
 	return ret;
 }
@@ -223,11 +217,7 @@ error_ret:
 /* fixme, confirm ordering in this function */
 static int adis16130_remove(struct spi_device *spi)
 {
-	struct adis16130_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
-
-	iio_device_unregister(indio_dev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/gyro/adis16260.h b/drivers/staging/iio/gyro/adis16260.h
index 24bf70e..969b624 100644
--- a/drivers/staging/iio/gyro/adis16260.h
+++ b/drivers/staging/iio/gyro/adis16260.h
@@ -85,21 +85,19 @@
 /**
  * struct adis16260_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
  * @trig:		data ready trigger registered with iio
- * @tx:			transmit buffer
- * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
  * @negate:		negate the scale parameter
+ * @tx:			transmit buffer
+ * @rx:			receive buffer
  **/
 struct adis16260_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	struct iio_trigger		*trig;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
-	unsigned			negate:1;
+	struct spi_device	*us;
+	struct iio_trigger	*trig;
+	struct mutex		buf_lock;
+	unsigned		negate:1;
+	u8			tx[ADIS16260_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADIS16260_MAX_RX];
 };
 
 int adis16260_set_irq(struct iio_dev *indio_dev, bool enable);
diff --git a/drivers/staging/iio/gyro/adis16260_core.c b/drivers/staging/iio/gyro/adis16260_core.c
index 3dc9a27..05797f4 100644
--- a/drivers/staging/iio/gyro/adis16260_core.c
+++ b/drivers/staging/iio/gyro/adis16260_core.c
@@ -41,7 +41,7 @@ static int adis16260_spi_write_reg_8(struct iio_dev *indio_dev,
 		u8 val)
 {
 	int ret;
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADIS16260_WRITE_REG(reg_address);
@@ -66,7 +66,7 @@ static int adis16260_spi_write_reg_16(struct iio_dev *indio_dev,
 {
 	int ret;
 	struct spi_message msg;
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[] = {
 		{
 			.tx_buf = st->tx,
@@ -109,7 +109,7 @@ static int adis16260_spi_read_reg_16(struct iio_dev *indio_dev,
 		u16 *val)
 {
 	struct spi_message msg;
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -152,7 +152,7 @@ static ssize_t adis16260_read_frequency_available(struct device *dev,
 						  char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 	if (spi_get_device_id(st->us)->driver_data)
 		return sprintf(buf, "%s\n", "0.129 ~ 256");
 	else
@@ -164,7 +164,7 @@ static ssize_t adis16260_read_frequency(struct device *dev,
 		char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 	int ret, len = 0;
 	u16 t;
 	int sps;
@@ -189,7 +189,7 @@ static ssize_t adis16260_write_frequency(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 	long val;
 	int ret;
 	u8 t;
@@ -435,7 +435,7 @@ static int adis16260_read_raw(struct iio_dev *indio_dev,
 			      int *val, int *val2,
 			      long mask)
 {
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 	int ret;
 	int bits;
 	u8 addr;
@@ -576,71 +576,58 @@ static int __devinit adis16260_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
 	struct adis16260_platform_data *pd = spi->dev.platform_data;
-	struct adis16260_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct adis16260_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
 	if (pd)
 		st->negate = pd->negate;
 	/* this is only used for removal purposes */
 	spi_set_drvdata(spi, st);
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADIS16260_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADIS16260_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
 
-	st->indio_dev->name = spi_get_device_id(st->us)->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adis16260_info;
-	st->indio_dev->num_channels
+	indio_dev->name = spi_get_device_id(st->us)->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adis16260_info;
+	indio_dev->num_channels
 		= ARRAY_SIZE(adis16260_channels_x);
 	if (pd && pd->direction)
 		switch (pd->direction) {
 		case 'x':
-			st->indio_dev->channels = adis16260_channels_x;
+			indio_dev->channels = adis16260_channels_x;
 			break;
 		case 'y':
-			st->indio_dev->channels = adis16260_channels_y;
+			indio_dev->channels = adis16260_channels_y;
 			break;
 		case 'z':
-			st->indio_dev->channels = adis16260_channels_z;
+			indio_dev->channels = adis16260_channels_z;
 			break;
 		default:
 			return -EINVAL;
 		}
 	else
-		st->indio_dev->channels = adis16260_channels_x;
-
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+		indio_dev->channels = adis16260_channels_x;
+	indio_dev->num_channels = ARRAY_SIZE(adis16260_channels_x);
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = adis16260_configure_ring(st->indio_dev);
+	ret = adis16260_configure_ring(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
-	ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
-					  st->indio_dev->channels,
+	ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
+					  indio_dev->channels,
 					  ARRAY_SIZE(adis16260_channels_x));
 	if (ret) {
 		printk(KERN_ERR "failed to initialize the ring\n");
@@ -648,34 +635,28 @@ static int __devinit adis16260_probe(struct spi_device *spi)
 	}
 
 	if (spi->irq) {
-		ret = adis16260_probe_trigger(st->indio_dev);
+		ret = adis16260_probe_trigger(indio_dev);
 		if (ret)
 			goto error_uninitialize_ring;
 	}
 
 	/* Get the device into a sane initial state */
-	ret = adis16260_initial_setup(st->indio_dev);
+	ret = adis16260_initial_setup(indio_dev);
 	if (ret)
 		goto error_remove_trigger;
 	return 0;
 
 error_remove_trigger:
-	adis16260_remove_trigger(st->indio_dev);
+	adis16260_remove_trigger(indio_dev);
 error_uninitialize_ring:
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 error_unreg_ring_funcs:
-	adis16260_unconfigure_ring(st->indio_dev);
+	adis16260_unconfigure_ring(indio_dev);
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
@@ -683,8 +664,7 @@ error_ret:
 static int adis16260_remove(struct spi_device *spi)
 {
 	int ret;
-	struct adis16260_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	ret = adis16260_stop_device(indio_dev);
 	if (ret)
@@ -693,13 +673,9 @@ static int adis16260_remove(struct spi_device *spi)
 	flush_scheduled_work();
 
 	adis16260_remove_trigger(indio_dev);
-
-	iio_ring_buffer_unregister(st->indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16260_unconfigure_ring(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
 
 err_ret:
 	return ret;
diff --git a/drivers/staging/iio/gyro/adis16260_ring.c b/drivers/staging/iio/gyro/adis16260_ring.c
index a092504..a4df8b3 100644
--- a/drivers/staging/iio/gyro/adis16260_ring.c
+++ b/drivers/staging/iio/gyro/adis16260_ring.c
@@ -17,7 +17,6 @@
 #include "../trigger.h"
 #include "adis16260.h"
 
-
 /**
  * adis16260_read_ring_data() read data registers which will be placed into ring
  * @dev: device associated with child of actual device (iio_dev or iio_trig)
@@ -27,7 +26,7 @@ static int adis16260_read_ring_data(struct device *dev, u8 *rx)
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfers[ADIS16260_OUTPUTS + 1];
 	int ret;
 	int i;
@@ -70,7 +69,7 @@ static irqreturn_t adis16260_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->private_data;
-	struct adis16260_state *st = iio_dev_get_devdata(indio_dev);
+	struct adis16260_state *st = iio_priv(indio_dev);
 	struct iio_ring_buffer *ring = indio_dev->ring;
 	int i = 0;
 	s16 *data;
@@ -83,7 +82,7 @@ static irqreturn_t adis16260_trigger_handler(int irq, void *p)
 	}
 
 	if (ring->scan_count &&
-	    adis16260_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
+	    adis16260_read_ring_data(&indio_dev->dev, st->rx) >= 0)
 		for (; i < ring->scan_count; i++)
 			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
@@ -93,7 +92,7 @@ static irqreturn_t adis16260_trigger_handler(int irq, void *p)
 
 	ring->access->store_to(ring, (u8 *)data, pf->timestamp);
 
-	iio_trigger_notify_done(st->indio_dev->trig);
+	iio_trigger_notify_done(indio_dev->trig);
 	kfree(data);
 
 	return IRQ_HANDLED;
diff --git a/drivers/staging/iio/gyro/adis16260_trigger.c b/drivers/staging/iio/gyro/adis16260_trigger.c
index 4f10fb5..01094d0 100644
--- a/drivers/staging/iio/gyro/adis16260_trigger.c
+++ b/drivers/staging/iio/gyro/adis16260_trigger.c
@@ -18,8 +18,7 @@
 static int adis16260_data_rdy_trigger_set_state(struct iio_trigger *trig,
 						bool state)
 {
-	struct adis16260_state *st = trig->private_data;
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = trig->private_data;
 
 	dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
 	return adis16260_set_irq(indio_dev, state);
@@ -28,7 +27,7 @@ static int adis16260_data_rdy_trigger_set_state(struct iio_trigger *trig,
 int adis16260_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct adis16260_state *st = indio_dev->dev_data;
+	struct adis16260_state *st = iio_priv(indio_dev);
 
 	st->trig = iio_allocate_trigger("%s-dev%d",
 					spi_get_device_id(st->us)->name,
@@ -48,7 +47,7 @@ int adis16260_probe_trigger(struct iio_dev *indio_dev)
 
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->owner = THIS_MODULE;
-	st->trig->private_data = st;
+	st->trig->private_data = indio_dev;
 	st->trig->set_trigger_state = &adis16260_data_rdy_trigger_set_state;
 	ret = iio_trigger_register(st->trig);
 
@@ -69,9 +68,9 @@ error_ret:
 
 void adis16260_remove_trigger(struct iio_dev *indio_dev)
 {
-	struct adis16260_state *state = indio_dev->dev_data;
+	struct adis16260_state *st = iio_priv(indio_dev);
 
-	iio_trigger_unregister(state->trig);
-	free_irq(state->us->irq, state->trig);
-	iio_free_trigger(state->trig);
+	iio_trigger_unregister(st->trig);
+	free_irq(st->us->irq, st->trig);
+	iio_free_trigger(st->trig);
 }
diff --git a/drivers/staging/iio/gyro/adxrs450.h b/drivers/staging/iio/gyro/adxrs450.h
index c92f694..b6b6828 100644
--- a/drivers/staging/iio/gyro/adxrs450.h
+++ b/drivers/staging/iio/gyro/adxrs450.h
@@ -42,17 +42,16 @@
 /**
  * struct adxrs450_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
+ * @buf_lock:		mutex to protect tx and rx
  * @tx:			transmit buffer
  * @rx:			recieve buffer
- * @buf_lock:		mutex to protect tx and rx
  **/
 struct adxrs450_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct mutex		buf_lock;
+	u8			tx[ADXRS450_MAX_RX] ____cacheline_aligned;
+	u8			rx[ADXRS450_MAX_TX];
+
 };
 
 #endif /* SPI_ADXRS450_H_ */
diff --git a/drivers/staging/iio/gyro/adxrs450_core.c b/drivers/staging/iio/gyro/adxrs450_core.c
index 3714e4a..7502a26 100644
--- a/drivers/staging/iio/gyro/adxrs450_core.c
+++ b/drivers/staging/iio/gyro/adxrs450_core.c
@@ -38,7 +38,7 @@ static int adxrs450_spi_read_reg_16(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adxrs450_state *st = iio_dev_get_devdata(indio_dev);
+	struct adxrs450_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -92,7 +92,7 @@ static int adxrs450_spi_write_reg_16(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adxrs450_state *st = iio_dev_get_devdata(indio_dev);
+	struct adxrs450_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers = {
 		.tx_buf = st->tx,
@@ -130,7 +130,7 @@ static int adxrs450_spi_sensor_data(struct device *dev, s16 *val)
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adxrs450_state *st = iio_dev_get_devdata(indio_dev);
+	struct adxrs450_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -267,12 +267,13 @@ static ssize_t adxrs450_read_sensor_data(struct device *dev,
 }
 
 /* Recommended Startup Sequence by spec */
-static int adxrs450_initial_setup(struct adxrs450_state *st)
+static int adxrs450_initial_setup(struct iio_dev *indio_dev)
 {
 	u32 t;
 	u16 data;
 	int ret;
-	struct device *dev = &st->indio_dev->dev;
+	struct device *dev = &indio_dev->dev;
+	struct adxrs450_state *st = iio_priv(indio_dev);
 
 	msleep(ADXRS450_STARTUP_DELAY*2);
 	ret = adxrs450_spi_initial(st, &t, 1);
@@ -357,46 +358,32 @@ static const struct iio_info adxrs450_info = {
 static int __devinit adxrs450_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct adxrs450_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
-		goto error_ret;
-	}
-	/* This is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	struct adxrs450_state *st;
+	struct iio_dev *indio_dev;
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADXRS450_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADXRS450_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
-		goto error_free_rx;
+		goto error_ret;
 	}
+	st = iio_priv(indio_dev);
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
+	/* This is only used for removal purposes */
+	spi_set_drvdata(spi, indio_dev);
 
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &adxrs450_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &adxrs450_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	regdone = 1;
 
 	/* Get the device into a sane initial state */
-	ret = adxrs450_initial_setup(st);
+	ret = adxrs450_initial_setup(indio_dev);
 	if (ret)
 		goto error_initial;
 	return 0;
@@ -404,27 +391,17 @@ static int __devinit adxrs450_probe(struct spi_device *spi)
 error_initial:
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
+
 error_ret:
 	return ret;
 }
 
 static int adxrs450_remove(struct spi_device *spi)
 {
-	struct adxrs450_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
index 38f1425..7a6ce4d 100644
--- a/drivers/staging/iio/iio.h
+++ b/drivers/staging/iio/iio.h
@@ -30,6 +30,7 @@
 enum iio_chan_type {
 	/* real channel types */
 	IIO_IN,
+	IIO_OUT,
 	IIO_CURRENT,
 	IIO_POWER,
 	IIO_ACCEL,
@@ -202,6 +203,9 @@ static inline s64 iio_get_time_ns(void)
  * call to iio_device_register. */
 #define IIO_VAL_INT 1
 #define IIO_VAL_INT_PLUS_MICRO 2
+#define IIO_VAL_INT_PLUS_NANO 3
+
+struct iio_trigger; /* forward declaration */
 
 /**
  * struct iio_info - constant information about device
@@ -217,12 +221,17 @@ static inline s64 iio_get_time_ns(void)
  *			contain the elements making up the returned value.
  * @write_raw:		function to write a value to the device.
  *			Parameters are the same as for read_raw.
+ * @write_raw_get_fmt:	callback function to query the expected
+ *			format/precision. If not set by the driver, write_raw
+ *			returns IIO_VAL_INT_PLUS_MICRO.
  * @read_event_config:	find out if the event is enabled.
  * @write_event_config:	set if the event is enabled.
  * @read_event_value:	read a value associated with the event. Meaning
  *			is event dependant. event_code specifies which event.
  * @write_event_value:	write the value associate with the event.
  *			Meaning is event dependent.
+ * @validate_trigger:	function to validate the trigger when the
+ *			current trigger gets changed.
  **/
 struct iio_info {
 	struct module			*driver_module;
@@ -242,6 +251,10 @@ struct iio_info {
 			 int val2,
 			 long mask);
 
+	int (*write_raw_get_fmt)(struct iio_dev *indio_dev,
+			 struct iio_chan_spec const *chan,
+			 long mask);
+
 	int (*read_event_config)(struct iio_dev *indio_dev,
 				 int event_code);
 
@@ -255,6 +268,9 @@ struct iio_info {
 	int (*write_event_value)(struct iio_dev *indio_dev,
 				 int event_code,
 				 int val);
+	int (*validate_trigger)(struct iio_dev *indio_dev,
+				struct iio_trigger *trig);
+
 };
 
 /**
diff --git a/drivers/staging/iio/imu/adis16400.h b/drivers/staging/iio/imu/adis16400.h
index e87715b9..1f8f0c6 100644
--- a/drivers/staging/iio/imu/adis16400.h
+++ b/drivers/staging/iio/imu/adis16400.h
@@ -41,6 +41,9 @@
 #define ADIS16350_YTEMP_OUT 0x12 /* Y-axis gyroscope temperature measurement */
 #define ADIS16350_ZTEMP_OUT 0x14 /* Z-axis gyroscope temperature measurement */
 
+#define ADIS16300_PITCH_OUT 0x12 /* X axis inclinometer output measurement */
+#define ADIS16300_ROLL_OUT  0x12 /* Y axis inclinometer output measurement */
+
 /* Calibration parameters */
 #define ADIS16400_XGYRO_OFF 0x1A /* X-axis gyroscope bias offset factor */
 #define ADIS16400_YGYRO_OFF 0x1C /* Y-axis gyroscope bias offset factor */
diff --git a/drivers/staging/iio/imu/adis16400_core.c b/drivers/staging/iio/imu/adis16400_core.c
index fe89802..a2c3b67 100644
--- a/drivers/staging/iio/imu/adis16400_core.c
+++ b/drivers/staging/iio/imu/adis16400_core.c
@@ -441,10 +441,12 @@ enum adis16400_chan {
 	magn_z,
 	temp,
 	temp0, temp1, temp2,
-	in1
+	in1,
+	incli_x,
+	incli_y,
 };
 
-static u8 adis16400_addresses[16][2] = {
+static u8 adis16400_addresses[17][2] = {
 	[in_supply] = { ADIS16400_SUPPLY_OUT, 0 },
 	[gyro_x] = { ADIS16400_XGYRO_OUT, ADIS16400_XGYRO_OFF },
 	[gyro_y] = { ADIS16400_YGYRO_OUT, ADIS16400_YGYRO_OFF },
@@ -459,7 +461,9 @@ static u8 adis16400_addresses[16][2] = {
 	[temp0] = { ADIS16350_XTEMP_OUT },
 	[temp1] = { ADIS16350_YTEMP_OUT },
 	[temp2] = { ADIS16350_ZTEMP_OUT },
-	[in1] = { ADIS16400_AUX_ADC , 0 },
+	[in1] = { ADIS16400_AUX_ADC, 0 },
+	[incli_x] = { ADIS16300_PITCH_OUT, 0 },
+	[incli_y] = { ADIS16300_ROLL_OUT, 0 }
 };
 
 static int adis16400_write_raw(struct iio_dev *indio_dev,
@@ -612,82 +616,82 @@ static struct iio_chan_spec adis16400_channels[] = {
 static struct iio_chan_spec adis16350_channels[] = {
 	IIO_CHAN(IIO_IN, 0, 1, 0, "supply", 0, 0,
 		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
-		 0, ADIS16400_SCAN_SUPPLY, IIO_ST('u', 12, 16, 0), 0),
+		 in_supply, ADIS16400_SCAN_SUPPLY, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_GYRO, 1, 0, 0, NULL, 0, IIO_MOD_X,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 1, ADIS16400_SCAN_GYRO_X, IIO_ST('s', 14, 16, 0), 0),
+		 gyro_x, ADIS16400_SCAN_GYRO_X, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_GYRO, 1, 0, 0, NULL, 0, IIO_MOD_Y,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 2, ADIS16400_SCAN_GYRO_Y, IIO_ST('s', 14, 16, 0), 0),
+		 gyro_y, ADIS16400_SCAN_GYRO_Y, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_GYRO, 1, 0, 0, NULL, 0, IIO_MOD_Z,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 3, ADIS16400_SCAN_GYRO_Z, IIO_ST('s', 14, 16, 0), 0),
+		 gyro_z, ADIS16400_SCAN_GYRO_Z, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 4, ADIS16400_SCAN_ACC_X, IIO_ST('s', 14, 16, 0), 0),
+		 accel_x, ADIS16400_SCAN_ACC_X, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 0, ADIS16400_SCAN_ACC_Y, IIO_ST('s', 14, 16, 0), 0),
+		 accel_y, ADIS16400_SCAN_ACC_Y, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Z,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 0, ADIS16400_SCAN_ACC_Z, IIO_ST('s', 14, 16, 0), 0),
+		 accel_z, ADIS16400_SCAN_ACC_Z, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, "x", 0, 0,
 		 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
-		 0, ADIS16350_SCAN_TEMP_X, IIO_ST('s', 12, 16, 0), 0),
+		 temp0, ADIS16350_SCAN_TEMP_X, IIO_ST('s', 12, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, "y", 1, 0,
 		 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
-		 0, ADIS16350_SCAN_TEMP_Y, IIO_ST('s', 12, 16, 0), 0),
+		 temp1, ADIS16350_SCAN_TEMP_Y, IIO_ST('s', 12, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, "z", 2, 0,
 		 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
-		 0, ADIS16350_SCAN_TEMP_Z, IIO_ST('s', 12, 16, 0), 0),
+		 temp2, ADIS16350_SCAN_TEMP_Z, IIO_ST('s', 12, 16, 0), 0),
 	IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
 		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
-		 0, ADIS16350_SCAN_ADC_0, IIO_ST('s', 12, 16, 0), 0),
+		 in1, ADIS16350_SCAN_ADC_0, IIO_ST('s', 12, 16, 0), 0),
 	IIO_CHAN_SOFT_TIMESTAMP(11)
 };
 
 static struct iio_chan_spec adis16300_channels[] = {
 	IIO_CHAN(IIO_IN, 0, 1, 0, "supply", 0, 0,
 		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
-		 0, ADIS16400_SCAN_SUPPLY, IIO_ST('u', 12, 16, 0), 0),
+		 in_supply, ADIS16400_SCAN_SUPPLY, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_GYRO, 1, 0, 0, NULL, 0, IIO_MOD_X,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 1, ADIS16400_SCAN_GYRO_X, IIO_ST('s', 14, 16, 0), 0),
+		 gyro_x, ADIS16400_SCAN_GYRO_X, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 4, ADIS16400_SCAN_ACC_X, IIO_ST('s', 14, 16, 0), 0),
+		 accel_x, ADIS16400_SCAN_ACC_X, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 0, ADIS16400_SCAN_ACC_Y, IIO_ST('s', 14, 16, 0), 0),
+		 accel_y, ADIS16400_SCAN_ACC_Y, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Z,
 		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 0, ADIS16400_SCAN_ACC_Z, IIO_ST('s', 14, 16, 0), 0),
+		 accel_z, ADIS16400_SCAN_ACC_Z, IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
 		 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
 		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
-		 0, ADIS16400_SCAN_TEMP, IIO_ST('s', 12, 16, 0), 0),
+		 temp, ADIS16400_SCAN_TEMP, IIO_ST('s', 12, 16, 0), 0),
 	IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
 		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
-		 0, ADIS16350_SCAN_ADC_0, IIO_ST('s', 12, 16, 0), 0),
+		 in1, ADIS16350_SCAN_ADC_0, IIO_ST('s', 12, 16, 0), 0),
 	IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_X,
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 0, ADIS16300_SCAN_INCLI_X, IIO_ST('s', 13, 16, 0), 0),
+		 incli_x, ADIS16300_SCAN_INCLI_X, IIO_ST('s', 13, 16, 0), 0),
 	IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_Y,
 		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
-		 0, ADIS16300_SCAN_INCLI_Y, IIO_ST('s', 13, 16, 0), 0),
+		 incli_y, ADIS16300_SCAN_INCLI_Y, IIO_ST('s', 13, 16, 0), 0),
 	IIO_CHAN_SOFT_TIMESTAMP(14)
 };
 
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index 94d3bfa..19819e7 100644
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -44,20 +44,22 @@ struct bus_type iio_bus_type = {
 EXPORT_SYMBOL(iio_bus_type);
 
 static const char * const iio_chan_type_name_spec_shared[] = {
-	[IIO_TIMESTAMP] = "timestamp",
-	[IIO_ACCEL] = "accel",
 	[IIO_IN] = "in",
+	[IIO_OUT] = "out",
 	[IIO_CURRENT] = "current",
 	[IIO_POWER] = "power",
+	[IIO_ACCEL] = "accel",
 	[IIO_IN_DIFF] = "in-in",
 	[IIO_GYRO] = "gyro",
-	[IIO_TEMP] = "temp",
 	[IIO_MAGN] = "magn",
+	[IIO_LIGHT] = "illuminance",
+	[IIO_INTENSITY] = "intensity",
+	[IIO_PROXIMITY] = "proximity",
+	[IIO_TEMP] = "temp",
 	[IIO_INCLI] = "incli",
 	[IIO_ROT] = "rot",
-	[IIO_INTENSITY] = "intensity",
-	[IIO_LIGHT] = "illuminance",
 	[IIO_ANGL] = "angl",
+	[IIO_TIMESTAMP] = "timestamp",
 };
 
 static const char * const iio_chan_type_name_spec_complex[] = {
@@ -396,6 +398,11 @@ static ssize_t iio_read_channel_info(struct device *dev,
 			return sprintf(buf, "-%d.%06u\n", val, -val2);
 		else
 			return sprintf(buf, "%d.%06u\n", val, val2);
+	} else if (ret == IIO_VAL_INT_PLUS_NANO) {
+		if (val2 < 0)
+			return sprintf(buf, "-%d.%09u\n", val, -val2);
+		else
+			return sprintf(buf, "%d.%09u\n", val, val2);
 	} else
 		return 0;
 }
@@ -407,25 +414,40 @@ static ssize_t iio_write_channel_info(struct device *dev,
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-	int ret, integer = 0, micro = 0, micro_mult = 100000;
+	int ret, integer = 0, fract = 0, fract_mult = 100000;
 	bool integer_part = true, negative = false;
 
 	/* Assumes decimal - precision based on number of digits */
 	if (!indio_dev->info->write_raw)
 		return -EINVAL;
+
+	if (indio_dev->info->write_raw_get_fmt)
+		switch (indio_dev->info->write_raw_get_fmt(indio_dev,
+			this_attr->c, this_attr->address)) {
+		case IIO_VAL_INT_PLUS_MICRO:
+			fract_mult = 100000;
+			break;
+		case IIO_VAL_INT_PLUS_NANO:
+			fract_mult = 100000000;
+			break;
+		default:
+			return -EINVAL;
+		}
+
 	if (buf[0] == '-') {
 		negative = true;
 		buf++;
 	}
+
 	while (*buf) {
 		if ('0' <= *buf && *buf <= '9') {
 			if (integer_part)
 				integer = integer*10 + *buf - '0';
 			else {
-				micro += micro_mult*(*buf - '0');
-				if (micro_mult == 1)
+				fract += fract_mult*(*buf - '0');
+				if (fract_mult == 1)
 					break;
-				micro_mult /= 10;
+				fract_mult /= 10;
 			}
 		} else if (*buf == '\n') {
 			if (*(buf + 1) == '\0')
@@ -443,11 +465,11 @@ static ssize_t iio_write_channel_info(struct device *dev,
 		if (integer)
 			integer = -integer;
 		else
-			micro = -micro;
+			fract = -fract;
 	}
 
 	ret = indio_dev->info->write_raw(indio_dev, this_attr->c,
-					 integer, micro, this_attr->address);
+					 integer, fract, this_attr->address);
 	if (ret)
 		return ret;
 
@@ -655,7 +677,8 @@ static int iio_device_add_channel_sysfs(struct iio_dev *dev_info,
 	else
 		ret = __iio_add_chan_devattr("raw", NULL, chan,
 					     &iio_read_channel_info,
-					     NULL,
+					     (chan->type == IIO_OUT ?
+					     &iio_write_channel_info : NULL),
 					     0,
 					     0,
 					     &dev_info->dev,
diff --git a/drivers/staging/iio/industrialio-trigger.c b/drivers/staging/iio/industrialio-trigger.c
index d504aa2..90ca2df 100644
--- a/drivers/staging/iio/industrialio-trigger.c
+++ b/drivers/staging/iio/industrialio-trigger.c
@@ -340,6 +340,9 @@ static ssize_t iio_trigger_write_current(struct device *dev,
 {
 	struct iio_dev *dev_info = dev_get_drvdata(dev);
 	struct iio_trigger *oldtrig = dev_info->trig;
+	struct iio_trigger *trig;
+	int ret;
+
 	mutex_lock(&dev_info->mlock);
 	if (dev_info->currentmode == INDIO_RING_TRIGGERED) {
 		mutex_unlock(&dev_info->mlock);
@@ -347,7 +350,22 @@ static ssize_t iio_trigger_write_current(struct device *dev,
 	}
 	mutex_unlock(&dev_info->mlock);
 
-	dev_info->trig = iio_trigger_find_by_name(buf, len);
+	trig = iio_trigger_find_by_name(buf, len);
+
+	if (trig && dev_info->info->validate_trigger) {
+		ret = dev_info->info->validate_trigger(dev_info, trig);
+		if (ret)
+			return ret;
+	}
+
+	if (trig && trig->validate_device) {
+		ret = trig->validate_device(trig, dev_info);
+		if (ret)
+			return ret;
+	}
+
+	dev_info->trig = trig;
+
 	if (oldtrig && dev_info->trig != oldtrig)
 		iio_put_trigger(oldtrig);
 	if (dev_info->trig)
diff --git a/drivers/staging/iio/kfifo_buf.c b/drivers/staging/iio/kfifo_buf.c
index cc14b96..6002368 100644
--- a/drivers/staging/iio/kfifo_buf.c
+++ b/drivers/staging/iio/kfifo_buf.c
@@ -110,9 +110,7 @@ struct iio_ring_buffer *iio_kfifo_allocate(struct iio_dev *indio_dev)
 	iio_ring_buffer_init(&kf->ring, indio_dev);
 	__iio_init_kfifo(kf);
 	kf->ring.dev.type = &iio_kfifo_type;
-	device_initialize(&kf->ring.dev);
 	kf->ring.dev.parent = &indio_dev->dev;
-	kf->ring.dev.bus = &iio_bus_type;
 	dev_set_drvdata(&kf->ring.dev, (void *)&(kf->ring));
 
 	return &kf->ring;
diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig
index 46d62d1..1ad2d56 100644
--- a/drivers/staging/iio/light/Kconfig
+++ b/drivers/staging/iio/light/Kconfig
@@ -1,4 +1,4 @@
-\#
+#
 # Light sensors
 #
 comment "Light sensors"
diff --git a/drivers/staging/iio/light/isl29018.c b/drivers/staging/iio/light/isl29018.c
index 4794ffd..426b6af 100644
--- a/drivers/staging/iio/light/isl29018.c
+++ b/drivers/staging/iio/light/isl29018.c
@@ -54,9 +54,9 @@
 #define ISL29018_MAX_REGS		ISL29018_REG_ADD_DATA_MSB
 
 struct isl29018_chip {
-	struct iio_dev		*indio_dev;
 	struct i2c_client	*client;
 	struct mutex		lock;
+	unsigned int		lux_scale;
 	unsigned int		range;
 	unsigned int		adc_bit;
 	int			prox_scheme;
@@ -68,7 +68,7 @@ static int isl29018_write_data(struct i2c_client *client, u8 reg,
 {
 	u8 regval;
 	int ret = 0;
-	struct isl29018_chip *chip = i2c_get_clientdata(client);
+	struct isl29018_chip *chip = iio_priv(i2c_get_clientdata(client));
 
 	regval = chip->reg_cache[reg];
 	regval &= ~mask;
@@ -158,7 +158,7 @@ static int isl29018_read_sensor_input(struct i2c_client *client, int mode)
 static int isl29018_read_lux(struct i2c_client *client, int *lux)
 {
 	int lux_data;
-	struct isl29018_chip *chip = i2c_get_clientdata(client);
+	struct isl29018_chip *chip = iio_priv(i2c_get_clientdata(client));
 
 	lux_data = isl29018_read_sensor_input(client,
 				COMMMAND1_OPMODE_ALS_ONCE);
@@ -166,7 +166,7 @@ static int isl29018_read_lux(struct i2c_client *client, int *lux)
 	if (lux_data < 0)
 		return lux_data;
 
-	*lux = (lux_data * chip->range) >> chip->adc_bit;
+	*lux = (lux_data * chip->range * chip->lux_scale) >> chip->adc_bit;
 
 	return 0;
 }
@@ -224,52 +224,13 @@ static int isl29018_read_proximity_ir(struct i2c_client *client, int scheme,
 	return 0;
 }
 
-static ssize_t get_sensor_data(struct device *dev, char *buf, int mode)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct isl29018_chip *chip = indio_dev->dev_data;
-	struct i2c_client *client = chip->client;
-	int value = 0;
-	int status;
-
-	mutex_lock(&chip->lock);
-	switch (mode) {
-	case COMMMAND1_OPMODE_PROX_ONCE:
-		status = isl29018_read_proximity_ir(client,
-				chip->prox_scheme, &value);
-		break;
-
-	case COMMMAND1_OPMODE_ALS_ONCE:
-		status = isl29018_read_lux(client, &value);
-		break;
-
-	case COMMMAND1_OPMODE_IR_ONCE:
-		status = isl29018_read_ir(client, &value);
-		break;
-
-	default:
-		dev_err(&client->dev, "Mode %d is not supported\n", mode);
-		mutex_unlock(&chip->lock);
-		return -EBUSY;
-	}
-	if (status < 0) {
-		dev_err(&client->dev, "Error in Reading data");
-		mutex_unlock(&chip->lock);
-		return status;
-	}
-
-	mutex_unlock(&chip->lock);
-
-	return sprintf(buf, "%d\n", value);
-}
-
 /* Sysfs interface */
 /* range */
 static ssize_t show_range(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct isl29018_chip *chip = indio_dev->dev_data;
+	struct isl29018_chip *chip = iio_priv(indio_dev);
 
 	return sprintf(buf, "%u\n", chip->range);
 }
@@ -278,7 +239,7 @@ static ssize_t store_range(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct isl29018_chip *chip = indio_dev->dev_data;
+	struct isl29018_chip *chip = iio_priv(indio_dev);
 	struct i2c_client *client = chip->client;
 	int status;
 	unsigned long lval;
@@ -311,7 +272,7 @@ static ssize_t show_resolution(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct isl29018_chip *chip = indio_dev->dev_data;
+	struct isl29018_chip *chip = iio_priv(indio_dev);
 
 	return sprintf(buf, "%u\n", chip->adc_bit);
 }
@@ -320,7 +281,7 @@ static ssize_t store_resolution(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct isl29018_chip *chip = indio_dev->dev_data;
+	struct isl29018_chip *chip = iio_priv(indio_dev);
 	struct i2c_client *client = chip->client;
 	int status;
 	unsigned long lval;
@@ -351,7 +312,7 @@ static ssize_t show_prox_infrared_supression(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct isl29018_chip *chip = indio_dev->dev_data;
+	struct isl29018_chip *chip = iio_priv(indio_dev);
 
 	/* return the "proximity scheme" i.e. if the chip does on chip
 	infrared supression (1 means perform on chip supression) */
@@ -362,7 +323,7 @@ static ssize_t store_prox_infrared_supression(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct isl29018_chip *chip = indio_dev->dev_data;
+	struct isl29018_chip *chip = iio_priv(indio_dev);
 	unsigned long lval;
 
 	if (strict_strtoul(buf, 10, &lval))
@@ -381,27 +342,87 @@ static ssize_t store_prox_infrared_supression(struct device *dev,
 	return count;
 }
 
-/* Read lux */
-static ssize_t show_lux(struct device *dev,
-		struct device_attribute *devattr, char *buf)
+/* Channel IO */
+static int isl29018_write_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int val,
+			      int val2,
+			      long mask)
 {
-	return get_sensor_data(dev, buf, COMMMAND1_OPMODE_ALS_ONCE);
-}
+	struct isl29018_chip *chip = iio_priv(indio_dev);
+	int ret = -EINVAL;
 
-/* Read ir */
-static ssize_t show_ir(struct device *dev,
-		struct device_attribute *devattr, char *buf)
-{
-	return get_sensor_data(dev, buf, COMMMAND1_OPMODE_IR_ONCE);
+	mutex_lock(&chip->lock);
+	if (mask == (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) &&
+	    chan->type == IIO_LIGHT) {
+		chip->lux_scale = val;
+		ret = 0;
+	}
+	mutex_unlock(&chip->lock);
+
+	return 0;
 }
 
-/* Read nearest ir */
-static ssize_t show_proxim_ir(struct device *dev,
-		struct device_attribute *devattr, char *buf)
+static int isl29018_read_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int *val,
+			     int *val2,
+			     long mask)
 {
-	return get_sensor_data(dev, buf, COMMMAND1_OPMODE_PROX_ONCE);
+	int ret = -EINVAL;
+	struct isl29018_chip *chip = iio_priv(indio_dev);
+	struct i2c_client *client = chip->client;
+
+	mutex_lock(&chip->lock);
+	switch (mask) {
+	case 0:
+		switch (chan->type) {
+		case IIO_LIGHT:
+			ret = isl29018_read_lux(client, val);
+			break;
+		case IIO_INTENSITY:
+			ret = isl29018_read_ir(client, val);
+			break;
+		case IIO_PROXIMITY:
+			ret = isl29018_read_proximity_ir(client,
+					chip->prox_scheme, val);
+			break;
+		default:
+			break;
+		}
+		if (!ret)
+			ret = IIO_VAL_INT;
+		break;
+	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+		if (chan->type == IIO_LIGHT) {
+			*val = chip->lux_scale;
+			ret = IIO_VAL_INT;
+		}
+		break;
+	default:
+		break;
+	}
+	mutex_unlock(&chip->lock);
+	return ret;
 }
 
+static const struct iio_chan_spec isl29018_channels[] = {
+	{
+		.type = IIO_LIGHT,
+		.indexed = 1,
+		.channel = 0,
+		.processed_val = 1,
+		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE),
+	}, {
+		.type = IIO_INTENSITY,
+		.modified = 1,
+		.channel2 = IIO_MOD_LIGHT_IR,
+	}, {
+		/* Unindexed in current ABI.  But perhaps it should be. */
+		.type = IIO_PROXIMITY,
+	}
+};
+
 static IIO_DEVICE_ATTR(range, S_IRUGO | S_IWUSR, show_range, store_range, 0);
 static IIO_CONST_ATTR(range_available, "1000 4000 16000 64000");
 static IIO_CONST_ATTR(adc_resolution_available, "4 8 12 16");
@@ -411,9 +432,6 @@ static IIO_DEVICE_ATTR(proximity_on_chip_ambient_infrared_supression,
 					S_IRUGO | S_IWUSR,
 					show_prox_infrared_supression,
 					store_prox_infrared_supression, 0);
-static IIO_DEVICE_ATTR(illuminance0_input, S_IRUGO, show_lux, NULL, 0);
-static IIO_DEVICE_ATTR(intensity_infrared_raw, S_IRUGO, show_ir, NULL, 0);
-static IIO_DEVICE_ATTR(proximity_raw, S_IRUGO, show_proxim_ir, NULL, 0);
 
 #define ISL29018_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr)
 #define ISL29018_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr)
@@ -423,9 +441,6 @@ static struct attribute *isl29018_attributes[] = {
 	ISL29018_DEV_ATTR(adc_resolution),
 	ISL29018_CONST_ATTR(adc_resolution_available),
 	ISL29018_DEV_ATTR(proximity_on_chip_ambient_infrared_supression),
-	ISL29018_DEV_ATTR(illuminance0_input),
-	ISL29018_DEV_ATTR(intensity_infrared_raw),
-	ISL29018_DEV_ATTR(proximity_raw),
 	NULL
 };
 
@@ -435,7 +450,7 @@ static const struct attribute_group isl29108_group = {
 
 static int isl29018_chip_init(struct i2c_client *client)
 {
-	struct isl29018_chip *chip = i2c_get_clientdata(client);
+	struct isl29018_chip *chip = iio_priv(i2c_get_clientdata(client));
 	int status;
 	int new_adc_bit;
 	unsigned int new_range;
@@ -458,44 +473,45 @@ static int isl29018_chip_init(struct i2c_client *client)
 static const struct iio_info isl29108_info = {
 	.attrs = &isl29108_group,
 	.driver_module = THIS_MODULE,
+	.read_raw = &isl29018_read_raw,
+	.write_raw = &isl29018_write_raw,
 };
 
 static int __devinit isl29018_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
 	struct isl29018_chip *chip;
+	struct iio_dev *indio_dev;
 	int err;
 
-	chip = kzalloc(sizeof(struct isl29018_chip), GFP_KERNEL);
-	if (!chip) {
-		dev_err(&client->dev, "Memory allocation fails\n");
+	indio_dev = iio_allocate_device(sizeof(*chip));
+	if (indio_dev == NULL) {
+		dev_err(&client->dev, "iio allocation fails\n");
 		err = -ENOMEM;
 		goto exit;
 	}
+	chip = iio_priv(indio_dev);
 
-	i2c_set_clientdata(client, chip);
+	i2c_set_clientdata(client, indio_dev);
 	chip->client = client;
 
 	mutex_init(&chip->lock);
 
+	chip->lux_scale = 1;
 	chip->range = 1000;
 	chip->adc_bit = 16;
 
 	err = isl29018_chip_init(client);
 	if (err)
-		goto exit_free;
+		goto exit_iio_free;
 
-	chip->indio_dev = iio_allocate_device(0);
-	if (!chip->indio_dev) {
-		dev_err(&client->dev, "iio allocation fails\n");
-		goto exit_free;
-	}
-	chip->indio_dev->info = &isl29108_info;
-	chip->indio_dev->name = id->name;
-	chip->indio_dev->dev.parent = &client->dev;
-	chip->indio_dev->dev_data = (void *)(chip);
-	chip->indio_dev->modes = INDIO_DIRECT_MODE;
-	err = iio_device_register(chip->indio_dev);
+	indio_dev->info = &isl29108_info;
+	indio_dev->channels = isl29018_channels;
+	indio_dev->num_channels = ARRAY_SIZE(isl29018_channels);
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	err = iio_device_register(indio_dev);
 	if (err) {
 		dev_err(&client->dev, "iio registration fails\n");
 		goto exit_iio_free;
@@ -503,20 +519,17 @@ static int __devinit isl29018_probe(struct i2c_client *client,
 
 	return 0;
 exit_iio_free:
-	iio_free_device(chip->indio_dev);
-exit_free:
-	kfree(chip);
+	iio_free_device(indio_dev);
 exit:
 	return err;
 }
 
 static int __devexit isl29018_remove(struct i2c_client *client)
 {
-	struct isl29018_chip *chip = i2c_get_clientdata(client);
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 
 	dev_dbg(&client->dev, "%s()\n", __func__);
-	iio_device_unregister(chip->indio_dev);
-	kfree(chip);
+	iio_device_unregister(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/light/tsl2563.c b/drivers/staging/iio/light/tsl2563.c
index 9cffa2e..f25243b 100644
--- a/drivers/staging/iio/light/tsl2563.c
+++ b/drivers/staging/iio/light/tsl2563.c
@@ -137,37 +137,14 @@ struct tsl2563_chip {
 	u32			data1;
 };
 
-static int tsl2563_write(struct i2c_client *client, u8 reg, u8 value)
-{
-	int ret;
-	u8 buf[2];
-
-	buf[0] = TSL2563_CMD | reg;
-	buf[1] = value;
-
-	ret = i2c_master_send(client, buf, sizeof(buf));
-	return (ret == sizeof(buf)) ? 0 : ret;
-}
-
-static int tsl2563_read(struct i2c_client *client, u8 reg, void *buf, int len)
-{
-	int ret;
-	u8 cmd = TSL2563_CMD | reg;
-
-	ret = i2c_master_send(client, &cmd, sizeof(cmd));
-	if (ret != sizeof(cmd))
-		return ret;
-
-	return i2c_master_recv(client, buf, len);
-}
-
 static int tsl2563_set_power(struct tsl2563_chip *chip, int on)
 {
 	struct i2c_client *client = chip->client;
 	u8 cmd;
 
 	cmd = on ? TSL2563_CMD_POWER_ON : TSL2563_CMD_POWER_OFF;
-	return tsl2563_write(client, TSL2563_REG_CTRL, cmd);
+	return i2c_smbus_write_byte_data(client,
+					 TSL2563_CMD | TSL2563_REG_CTRL, cmd);
 }
 
 /*
@@ -178,36 +155,40 @@ static int tsl2563_get_power(struct tsl2563_chip *chip)
 {
 	struct i2c_client *client = chip->client;
 	int ret;
-	u8 val;
 
-	ret = tsl2563_read(client, TSL2563_REG_CTRL, &val, sizeof(val));
-	if (ret != sizeof(val))
+	ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_CTRL);
+	if (ret < 0)
 		return ret;
 
-	return (val & TSL2563_CTRL_POWER_MASK) == TSL2563_CMD_POWER_ON;
+	return (ret & TSL2563_CTRL_POWER_MASK) == TSL2563_CMD_POWER_ON;
 }
 
 static int tsl2563_configure(struct tsl2563_chip *chip)
 {
 	int ret;
 
-	ret = tsl2563_write(chip->client, TSL2563_REG_TIMING,
+	ret = i2c_smbus_write_byte_data(chip->client,
+			TSL2563_CMD | TSL2563_REG_TIMING,
 			chip->gainlevel->gaintime);
 	if (ret)
 		goto error_ret;
-	ret = tsl2563_write(chip->client, TSL2563_REG_HIGHLOW,
+	ret = i2c_smbus_write_byte_data(chip->client,
+			TSL2563_CMD | TSL2563_REG_HIGHLOW,
 			chip->high_thres & 0xFF);
 	if (ret)
 		goto error_ret;
-	ret = tsl2563_write(chip->client, TSL2563_REG_HIGHHIGH,
+	ret = i2c_smbus_write_byte_data(chip->client,
+			TSL2563_CMD | TSL2563_REG_HIGHHIGH,
 			(chip->high_thres >> 8) & 0xFF);
 	if (ret)
 		goto error_ret;
-	ret = tsl2563_write(chip->client, TSL2563_REG_LOWLOW,
+	ret = i2c_smbus_write_byte_data(chip->client,
+			TSL2563_CMD | TSL2563_REG_LOWLOW,
 			chip->low_thres & 0xFF);
 	if (ret)
 		goto error_ret;
-	ret = tsl2563_write(chip->client, TSL2563_REG_LOWHIGH,
+	ret = i2c_smbus_write_byte_data(chip->client,
+			TSL2563_CMD | TSL2563_REG_LOWHIGH,
 			(chip->low_thres >> 8) & 0xFF);
 /* Interrupt register is automatically written anyway if it is relevant
    so is not here */
@@ -242,8 +223,8 @@ static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id)
 	struct i2c_client *client = chip->client;
 	int ret;
 
-	ret = tsl2563_read(client, TSL2563_REG_ID, id, sizeof(*id));
-	if (ret != sizeof(*id))
+	ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_ID);
+	if (ret < 0)
 		return ret;
 
 	return 0;
@@ -313,8 +294,9 @@ static int tsl2563_adjust_gainlevel(struct tsl2563_chip *chip, u16 adc)
 		(adc > chip->gainlevel->max) ?
 			chip->gainlevel++ : chip->gainlevel--;
 
-		tsl2563_write(client, TSL2563_REG_TIMING,
-			      chip->gainlevel->gaintime);
+		i2c_smbus_write_byte_data(client,
+					  TSL2563_CMD | TSL2563_REG_TIMING,
+					  chip->gainlevel->gaintime);
 
 		tsl2563_wait_adc(chip);
 		tsl2563_wait_adc(chip);
@@ -327,7 +309,6 @@ static int tsl2563_adjust_gainlevel(struct tsl2563_chip *chip, u16 adc)
 static int tsl2563_get_adc(struct tsl2563_chip *chip)
 {
 	struct i2c_client *client = chip->client;
-	u8 buf0[2], buf1[2];
 	u16 adc0, adc1;
 	int retry = 1;
 	int ret = 0;
@@ -350,19 +331,17 @@ static int tsl2563_get_adc(struct tsl2563_chip *chip)
 	}
 
 	while (retry) {
-		ret = tsl2563_read(client,
-				   TSL2563_REG_DATA0LOW,
-				   buf0, sizeof(buf0));
-		if (ret != sizeof(buf0))
+		ret = i2c_smbus_read_word_data(client,
+				TSL2563_CMD | TSL2563_REG_DATA0LOW);
+		if (ret < 0)
 			goto out;
+		adc0 = ret;
 
-		ret = tsl2563_read(client, TSL2563_REG_DATA1LOW,
-				   buf1, sizeof(buf1));
-		if (ret != sizeof(buf1))
+		ret = i2c_smbus_read_word_data(client,
+				TSL2563_CMD | TSL2563_REG_DATA1LOW);
+		if (ret < 0)
 			goto out;
-
-		adc0 = (buf0[1] << 8) + buf0[0];
-		adc1 = (buf1[1] << 8) + buf1[0];
+		adc1 = ret;
 
 		retry = tsl2563_adjust_gainlevel(chip, adc0);
 	}
@@ -548,15 +527,16 @@ error_ret:
 	return ret;
 }
 
+#define INFO_MASK (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE)
+#define EVENT_MASK (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \
+		    IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING))
+#define IIO_CHAN_2563(type, mod, proc, chan, imask, emask) \
+	IIO_CHAN(type, mod, 1, proc, NULL, chan, 0, imask, 0, 0, {}, emask)
+
 static const struct iio_chan_spec tsl2563_channels[] = {
-	IIO_CHAN(IIO_LIGHT, 0, 1, 1, NULL, 0, 0, 0, 0, 0, {}, 0),
-	IIO_CHAN(IIO_INTENSITY, 1, 1, 0, "both", 0,
-		 (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE), 0, 0, 0, {},
-		 IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) |
-		 IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)),
-	IIO_CHAN(IIO_INTENSITY, 1, 1, 0, "ir", 1,
-		 (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE), 0, 0, 0, {},
-		 0)
+	IIO_CHAN_2563(IIO_LIGHT,     0, 1, 0, 0, 0),
+	IIO_CHAN_2563(IIO_INTENSITY, 1, 0, 0, INFO_MASK, EVENT_MASK),
+	IIO_CHAN_2563(IIO_INTENSITY, 1, 0, 1, INFO_MASK, 0),
 };
 
 static int tsl2563_read_thresh(struct iio_dev *indio_dev,
@@ -592,11 +572,13 @@ static ssize_t tsl2563_write_thresh(struct iio_dev *indio_dev,
 	else
 		address = TSL2563_REG_LOWLOW;
 	mutex_lock(&chip->lock);
-	ret = tsl2563_write(chip->client, address, val & 0xFF);
+	ret = i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | address,
+					val & 0xFF);
 	if (ret)
 		goto error_ret;
-	ret = tsl2563_write(chip->client, address + 1,
-			(val >> 8) & 0xFF);
+	ret = i2c_smbus_write_byte_data(chip->client,
+					TSL2563_CMD | (address + 1),
+					(val >> 8) & 0xFF);
 	if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING)
 		chip->high_thres = val;
 	else
@@ -612,7 +594,6 @@ static irqreturn_t tsl2563_event_handler(int irq, void *private)
 {
 	struct iio_dev *dev_info = private;
 	struct tsl2563_chip *chip = iio_priv(dev_info);
-	u8 cmd = TSL2563_CMD | TSL2563_CLEARINT;
 
 	iio_push_event(dev_info, 0,
 		       IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_LIGHT,
@@ -622,7 +603,7 @@ static irqreturn_t tsl2563_event_handler(int irq, void *private)
 		       iio_get_time_ns());
 
 	/* clear the interrupt and push the event */
-	i2c_master_send(chip->client, &cmd, sizeof(cmd));
+	i2c_smbus_write_byte(chip->client, TSL2563_CMD | TSL2563_CLEARINT);
 	return IRQ_HANDLED;
 }
 
@@ -647,13 +628,17 @@ static int tsl2563_write_interrupt_config(struct iio_dev *indio_dev,
 			if (ret)
 				goto out;
 		}
-		ret = tsl2563_write(chip->client, TSL2563_REG_INT, chip->intr);
+		ret = i2c_smbus_write_byte_data(chip->client,
+						TSL2563_CMD | TSL2563_REG_INT,
+						chip->intr);
 		chip->int_enabled = true;
 	}
 
 	if (!state && (chip->intr & 0x30)) {
 		chip->intr |= ~0x30;
-		ret = tsl2563_write(chip->client, TSL2563_REG_INT, chip->intr);
+		ret = i2c_smbus_write_byte_data(chip->client,
+						TSL2563_CMD | TSL2563_REG_INT,
+						chip->intr);
 		chip->int_enabled = false;
 		/* now the interrupt is not enabled, we can go to sleep */
 		schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
@@ -668,16 +653,15 @@ static int tsl2563_read_interrupt_config(struct iio_dev *indio_dev,
 					   int event_code)
 {
 	struct tsl2563_chip *chip = iio_priv(indio_dev);
-	u8 rxbuf;
 	int ret;
 
 	mutex_lock(&chip->lock);
-	ret = tsl2563_read(chip->client, TSL2563_REG_INT,
-			   &rxbuf, sizeof(rxbuf));
+	ret = i2c_smbus_read_byte_data(chip->client,
+				       TSL2563_CMD | TSL2563_REG_INT);
 	mutex_unlock(&chip->lock);
 	if (ret < 0)
 		goto error_ret;
-	ret = !!(rxbuf & 0x30);
+	ret = !!(ret & 0x30);
 error_ret:
 
 	return ret;
@@ -690,6 +674,8 @@ static struct i2c_driver tsl2563_i2c_driver;
 
 static const struct iio_info tsl2563_info_no_irq = {
 	.driver_module = THIS_MODULE,
+	.read_raw = &tsl2563_read_raw,
+	.write_raw = &tsl2563_write_raw,
 };
 
 static const struct iio_info tsl2563_info = {
@@ -797,7 +783,8 @@ static int tsl2563_remove(struct i2c_client *client)
 		cancel_delayed_work(&chip->poweroff_work);
 	/* Ensure that interrupts are disabled - then flush any bottom halves */
 	chip->intr |= ~0x30;
-	tsl2563_write(chip->client, TSL2563_REG_INT, chip->intr);
+	i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | TSL2563_REG_INT,
+				  chip->intr);
 	flush_scheduled_work();
 	tsl2563_set_power(chip, 0);
 	if (client->irq)
diff --git a/drivers/staging/iio/magnetometer/ak8975.c b/drivers/staging/iio/magnetometer/ak8975.c
index 700f96c..33919e8 100644
--- a/drivers/staging/iio/magnetometer/ak8975.c
+++ b/drivers/staging/iio/magnetometer/ak8975.c
@@ -89,7 +89,6 @@
  */
 struct ak8975_data {
 	struct i2c_client	*client;
-	struct iio_dev		*indio_dev;
 	struct attribute_group	attrs;
 	struct mutex		lock;
 	u8			asa[3];
@@ -221,7 +220,7 @@ static ssize_t show_mode(struct device *dev, struct device_attribute *devattr,
 			 char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ak8975_data *data = indio_dev->dev_data;
+	struct ak8975_data *data = iio_priv(indio_dev);
 
 	return sprintf(buf, "%lu\n", data->mode);
 }
@@ -234,7 +233,7 @@ static ssize_t store_mode(struct device *dev, struct device_attribute *devattr,
 			  const char *buf, size_t count)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ak8975_data *data = indio_dev->dev_data;
+	struct ak8975_data *data = iio_priv(indio_dev);
 	struct i2c_client *client = data->client;
 	unsigned long oval;
 	int ret;
@@ -310,7 +309,7 @@ static ssize_t show_scale(struct device *dev, struct device_attribute *devattr,
 			  char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ak8975_data *data = indio_dev->dev_data;
+	struct ak8975_data *data = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(devattr);
 
 	return sprintf(buf, "%ld\n", data->raw_to_gauss[this_attr->address]);
@@ -376,7 +375,7 @@ static ssize_t show_raw(struct device *dev, struct device_attribute *devattr,
 			char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ak8975_data *data = indio_dev->dev_data;
+	struct ak8975_data *data = iio_priv(indio_dev);
 	struct i2c_client *client = data->client;
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(devattr);
 	u16 meas_reg;
@@ -483,46 +482,41 @@ static int ak8975_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	struct ak8975_data *data;
+	struct iio_dev *indio_dev;
+	int eoc_gpio;
 	int err;
 
-	/* Allocate our device context. */
-	data = kzalloc(sizeof(struct ak8975_data), GFP_KERNEL);
-	if (!data) {
-		dev_err(&client->dev, "Memory allocation fails\n");
-		err = -ENOMEM;
-		goto exit;
-	}
-
-	i2c_set_clientdata(client, data);
-	data->client = client;
-
-	mutex_init(&data->lock);
-
 	/* Grab and set up the supplied GPIO. */
-	data->eoc_irq = client->irq;
-	data->eoc_gpio = irq_to_gpio(client->irq);
+	eoc_gpio = irq_to_gpio(client->irq);
 
 	/* We may not have a GPIO based IRQ to scan, that is fine, we will
 	   poll if so */
-	if (data->eoc_gpio > 0) {
-		err = gpio_request(data->eoc_gpio, "ak_8975");
+	if (eoc_gpio > 0) {
+		err = gpio_request(eoc_gpio, "ak_8975");
 		if (err < 0) {
 			dev_err(&client->dev,
 				"failed to request GPIO %d, error %d\n",
-							data->eoc_gpio, err);
-			goto exit_free;
+							eoc_gpio, err);
+			goto exit;
 		}
 
-		err = gpio_direction_input(data->eoc_gpio);
+		err = gpio_direction_input(eoc_gpio);
 		if (err < 0) {
 			dev_err(&client->dev,
 				"Failed to configure input direction for GPIO %d, error %d\n",
-						data->eoc_gpio, err);
+						eoc_gpio, err);
 			goto exit_gpio;
 		}
 	} else
-		data->eoc_gpio = 0;	/* No GPIO available */
+		eoc_gpio = 0;	/* No GPIO available */
 
+	/* Register with IIO */
+	indio_dev = iio_allocate_device(sizeof(*data));
+	if (indio_dev == NULL) {
+		err = -ENOMEM;
+		goto exit_gpio;
+	}
+	data = iio_priv(indio_dev);
 	/* Perform some basic start-of-day setup of the device. */
 	err = ak8975_setup(client);
 	if (err < 0) {
@@ -530,46 +524,41 @@ static int ak8975_probe(struct i2c_client *client,
 		goto exit_gpio;
 	}
 
-	/* Register with IIO */
-	data->indio_dev = iio_allocate_device(0);
-	if (data->indio_dev == NULL) {
-		err = -ENOMEM;
-		goto exit_gpio;
-	}
-
-	data->indio_dev->dev.parent = &client->dev;
-	data->indio_dev->info = &ak8975_info;
-	data->indio_dev->dev_data = (void *)(data);
-	data->indio_dev->modes = INDIO_DIRECT_MODE;
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+	mutex_init(&data->lock);
+	data->eoc_irq = client->irq;
+	data->eoc_gpio = eoc_gpio;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &ak8975_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	err = iio_device_register(data->indio_dev);
+	err = iio_device_register(indio_dev);
 	if (err < 0)
 		goto exit_free_iio;
 
 	return 0;
 
 exit_free_iio:
-	iio_free_device(data->indio_dev);
+	iio_free_device(indio_dev);
 exit_gpio:
-	if (data->eoc_gpio)
-		gpio_free(data->eoc_gpio);
-exit_free:
-	kfree(data);
+	if (eoc_gpio)
+		gpio_free(eoc_gpio);
 exit:
 	return err;
 }
 
 static int ak8975_remove(struct i2c_client *client)
 {
-	struct ak8975_data *data = i2c_get_clientdata(client);
-
-	iio_device_unregister(data->indio_dev);
-	iio_free_device(data->indio_dev);
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct ak8975_data *data = iio_priv(indio_dev);
+	int eoc_gpio = data->eoc_gpio;
 
-	if (data->eoc_gpio)
-		gpio_free(data->eoc_gpio);
+	iio_device_unregister(indio_dev);
+	iio_free_device(indio_dev);
 
-	kfree(data);
+	if (eoc_gpio)
+		gpio_free(eoc_gpio);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c
index dd9a3bb..b44c273a 100644
--- a/drivers/staging/iio/magnetometer/hmc5843.c
+++ b/drivers/staging/iio/magnetometer/hmc5843.c
@@ -131,7 +131,6 @@ static const unsigned short normal_i2c[] = { HMC5843_I2C_ADDRESS,
 
 /* Each client has this additional data */
 struct hmc5843_data {
-	struct iio_dev	*indio_dev;
 	struct mutex lock;
 	u8		rate;
 	u8		meas_conf;
@@ -159,7 +158,7 @@ static ssize_t hmc5843_read_measurement(struct device *dev,
 	struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
 	s16 coordinate_val;
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-	struct hmc5843_data *data = indio_dev->dev_data;
+	struct hmc5843_data *data = iio_priv(indio_dev);
 	s32 result;
 
 	mutex_lock(&data->lock);
@@ -202,7 +201,7 @@ static ssize_t hmc5843_show_operating_mode(struct device *dev,
 					char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct hmc5843_data *data = indio_dev->dev_data;
+	struct hmc5843_data *data = iio_priv(indio_dev);
 	return sprintf(buf, "%d\n", data->operating_mode);
 }
 
@@ -213,7 +212,7 @@ static ssize_t hmc5843_set_operating_mode(struct device *dev,
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
-	struct hmc5843_data *data = indio_dev->dev_data;
+	struct hmc5843_data *data = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	unsigned long operating_mode = 0;
 	s32 status;
@@ -278,7 +277,7 @@ static ssize_t hmc5843_show_measurement_configuration(struct device *dev,
 						char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct hmc5843_data *data = indio_dev->dev_data;
+	struct hmc5843_data *data = iio_priv(indio_dev);
 	return sprintf(buf, "%d\n", data->meas_conf);
 }
 
@@ -350,7 +349,7 @@ static ssize_t set_sampling_frequency(struct device *dev,
 
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
-	struct hmc5843_data *data = indio_dev->dev_data;
+	struct hmc5843_data *data = iio_priv(indio_dev);
 	unsigned long rate = 0;
 
 	if (strncmp(buf, "0.5" , 3) == 0)
@@ -422,7 +421,7 @@ static ssize_t show_range(struct device *dev,
 {
 	u8 range;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct hmc5843_data *data = indio_dev->dev_data;
+	struct hmc5843_data *data = iio_priv(indio_dev);
 
 	range = data->range;
 	return sprintf(buf, "%d\n", regval_to_input_field_mg[range]);
@@ -436,7 +435,7 @@ static ssize_t set_range(struct device *dev,
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-	struct hmc5843_data *data = indio_dev->dev_data;
+	struct hmc5843_data *data = iio_priv(indio_dev);
 	unsigned long range = 0;
 	int error;
 	mutex_lock(&data->lock);
@@ -473,7 +472,7 @@ static ssize_t show_scale(struct device *dev,
 			char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct hmc5843_data *data = indio_dev->dev_data;
+	struct hmc5843_data *data = iio_priv(indio_dev);
 	return strlen(strcpy(buf, regval_to_scale[data->range]));
 }
 static IIO_DEVICE_ATTR(magn_scale,
@@ -538,53 +537,46 @@ static int hmc5843_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
 	struct hmc5843_data *data;
+	struct iio_dev *indio_dev;
 	int err = 0;
 
-	data = kzalloc(sizeof(struct hmc5843_data), GFP_KERNEL);
-	if (!data) {
+	indio_dev = iio_allocate_device(sizeof(*data));
+	if (indio_dev == NULL) {
 		err = -ENOMEM;
 		goto exit;
 	}
-
+	data = iio_priv(indio_dev);
 	/* default settings at probe */
 
 	data->meas_conf = CONF_NORMAL;
 	data->range = RANGE_1_0;
 	data->operating_mode = MODE_CONVERSION_CONTINUOUS;
 
-	i2c_set_clientdata(client, data);
+	i2c_set_clientdata(client, indio_dev);
 
 	/* Initialize the HMC5843 chip */
 	hmc5843_init_client(client);
 
-	data->indio_dev = iio_allocate_device(0);
-	if (!data->indio_dev) {
-		err = -ENOMEM;
-		goto exit_free1;
-	}
-	data->indio_dev->info = &hmc5843_info;
-	data->indio_dev->dev.parent = &client->dev;
-	data->indio_dev->dev_data = (void *)(data);
-	data->indio_dev->modes = INDIO_DIRECT_MODE;
-	err = iio_device_register(data->indio_dev);
+	indio_dev->info = &hmc5843_info;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	err = iio_device_register(indio_dev);
 	if (err)
 		goto exit_free2;
 	return 0;
 exit_free2:
-	iio_free_device(data->indio_dev);
-exit_free1:
-	kfree(data);
+	iio_free_device(indio_dev);
 exit:
 	return err;
 }
 
 static int hmc5843_remove(struct i2c_client *client)
 {
-	struct hmc5843_data *data = i2c_get_clientdata(client);
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 	 /*  sleep mode to save power */
 	hmc5843_configure(client, MODE_SLEEP);
-	iio_device_unregister(data->indio_dev);
-	kfree(i2c_get_clientdata(client));
+	iio_device_unregister(indio_dev);
+
 	return 0;
 }
 
diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c
index 6c9c23f..4d1bd42 100644
--- a/drivers/staging/iio/meter/ade7753.c
+++ b/drivers/staging/iio/meter/ade7753.c
@@ -29,7 +29,7 @@ static int ade7753_spi_write_reg_8(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7753_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADE7753_WRITE_REG(reg_address);
@@ -47,7 +47,7 @@ static int ade7753_spi_write_reg_16(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7753_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADE7753_WRITE_REG(reg_address);
@@ -64,7 +64,7 @@ static int ade7753_spi_read_reg_8(struct device *dev,
 		u8 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7753_state *st = iio_priv(indio_dev);
 	ssize_t ret;
 
 	ret = spi_w8r8(st->us, ADE7753_READ_REG(reg_address));
@@ -83,7 +83,7 @@ static int ade7753_spi_read_reg_16(struct device *dev,
 		u16 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7753_state *st = iio_priv(indio_dev);
 	ssize_t ret;
 
 	ret = spi_w8r16(st->us, ADE7753_READ_REG(reg_address));
@@ -105,7 +105,7 @@ static int ade7753_spi_read_reg_24(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7753_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -369,10 +369,11 @@ static int ade7753_stop_device(struct device *dev)
 	return ade7753_spi_write_reg_16(dev, ADE7753_MODE, val);
 }
 
-static int ade7753_initial_setup(struct ade7753_state *st)
+static int ade7753_initial_setup(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct device *dev = &st->indio_dev->dev;
+	struct device *dev = &indio_dev->dev;
+	struct ade7753_state *st = iio_priv(indio_dev);
 
 	/* use low spi speed for init */
 	st->us->mode = SPI_MODE_3;
@@ -397,9 +398,9 @@ static ssize_t ade7753_read_frequency(struct device *dev,
 		char *buf)
 {
 	int ret, len = 0;
-	u8 t;
+	u16 t;
 	int sps;
-	ret = ade7753_spi_read_reg_8(dev, ADE7753_MODE,	&t);
+	ret = ade7753_spi_read_reg_16(dev, ADE7753_MODE, &t);
 	if (ret)
 		return ret;
 
@@ -416,7 +417,7 @@ static ssize_t ade7753_write_frequency(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7753_state *st = iio_priv(indio_dev);
 	unsigned long val;
 	int ret;
 	u16 reg, t;
@@ -512,62 +513,44 @@ static const struct iio_info ade7753_info = {
 static int __devinit ade7753_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct ade7753_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct ade7753_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADE7753_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADE7753_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
+	st = iio_priv(indio_dev);
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
 
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &ade7753_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &ade7753_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	regdone = 1;
 
 	/* Get the device into a sane initial state */
-	ret = ade7753_initial_setup(st);
+	ret = ade7753_initial_setup(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	return 0;
 
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
+
 error_ret:
 	return ret;
 }
@@ -576,19 +559,13 @@ error_ret:
 static int ade7753_remove(struct spi_device *spi)
 {
 	int ret;
-	struct ade7753_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	ret = ade7753_stop_device(&(indio_dev->dev));
 	if (ret)
 		goto err_ret;
 
 	iio_device_unregister(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
-
-	return 0;
 
 err_ret:
 	return ret;
diff --git a/drivers/staging/iio/meter/ade7753.h b/drivers/staging/iio/meter/ade7753.h
index 3b9c7f6..3f059d3 100644
--- a/drivers/staging/iio/meter/ade7753.h
+++ b/drivers/staging/iio/meter/ade7753.h
@@ -60,17 +60,15 @@
 /**
  * struct ade7753_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
  * @tx:			transmit buffer
  * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
  **/
 struct ade7753_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct mutex		buf_lock;
+	u8			tx[ADE7753_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADE7753_MAX_RX];
 };
 
 #endif
diff --git a/drivers/staging/iio/meter/ade7754.c b/drivers/staging/iio/meter/ade7754.c
index 378f2c8..f4f85fd 100644
--- a/drivers/staging/iio/meter/ade7754.c
+++ b/drivers/staging/iio/meter/ade7754.c
@@ -29,7 +29,7 @@ static int ade7754_spi_write_reg_8(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7754_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADE7754_WRITE_REG(reg_address);
@@ -47,7 +47,7 @@ static int ade7754_spi_write_reg_16(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7754_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADE7754_WRITE_REG(reg_address);
@@ -64,7 +64,7 @@ static int ade7754_spi_read_reg_8(struct device *dev,
 		u8 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7754_state *st = iio_priv(indio_dev);
 	int ret;
 
 	ret = spi_w8r8(st->us, ADE7754_READ_REG(reg_address));
@@ -83,7 +83,7 @@ static int ade7754_spi_read_reg_16(struct device *dev,
 		u16 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7754_state *st = iio_priv(indio_dev);
 	int ret;
 
 	ret = spi_w8r16(st->us, ADE7754_READ_REG(reg_address));
@@ -105,7 +105,7 @@ static int ade7754_spi_read_reg_24(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7754_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -388,10 +388,11 @@ static int ade7754_stop_device(struct device *dev)
 	return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val);
 }
 
-static int ade7754_initial_setup(struct ade7754_state *st)
+static int ade7754_initial_setup(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct device *dev = &st->indio_dev->dev;
+	struct ade7754_state *st = iio_priv(indio_dev);
+	struct device *dev = &indio_dev->dev;
 
 	/* use low spi speed for init */
 	st->us->mode = SPI_MODE_3;
@@ -436,7 +437,7 @@ static ssize_t ade7754_write_frequency(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7754_state *st = iio_priv(indio_dev);
 	unsigned long val;
 	int ret;
 	u8 reg, t;
@@ -535,62 +536,44 @@ static const struct iio_info ade7754_info = {
 static int __devinit ade7754_probe(struct spi_device *spi)
 {
 	int ret, regdone = 0;
-	struct ade7754_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct ade7754_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADE7754_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADE7754_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
+	st = iio_priv(indio_dev);
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
 
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->info = &ade7754_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &ade7754_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	regdone = 1;
 
 	/* Get the device into a sane initial state */
-	ret = ade7754_initial_setup(st);
+	ret = ade7754_initial_setup(indio_dev);
 	if (ret)
 		goto error_free_dev;
 	return 0;
 
 error_free_dev:
 	if (regdone)
-		iio_device_unregister(st->indio_dev);
+		iio_device_unregister(indio_dev);
 	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+		iio_free_device(indio_dev);
+
 error_ret:
 	return ret;
 }
@@ -599,22 +582,17 @@ error_ret:
 static int ade7754_remove(struct spi_device *spi)
 {
 	int ret;
-	struct ade7754_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	ret = ade7754_stop_device(&(indio_dev->dev));
 	if (ret)
 		goto err_ret;
 
 	iio_device_unregister(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
-
-	return 0;
 
 err_ret:
 	return ret;
+
 }
 
 static struct spi_driver ade7754_driver = {
diff --git a/drivers/staging/iio/meter/ade7754.h b/drivers/staging/iio/meter/ade7754.h
index 0aa0522..6121125 100644
--- a/drivers/staging/iio/meter/ade7754.h
+++ b/drivers/staging/iio/meter/ade7754.h
@@ -78,17 +78,15 @@
 /**
  * struct ade7754_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
+ * @buf_lock:		mutex to protect tx and rx
  * @tx:			transmit buffer
  * @rx:			receive buffer
- * @buf_lock:		mutex to protect tx and rx
  **/
 struct ade7754_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct mutex		buf_lock;
+	u8			tx[ADE7754_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADE7754_MAX_RX];
 };
 
 #endif
diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c
index 730f6d9..a51a64c 100644
--- a/drivers/staging/iio/meter/ade7759.c
+++ b/drivers/staging/iio/meter/ade7759.c
@@ -29,7 +29,7 @@ static int ade7759_spi_write_reg_8(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7759_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADE7759_WRITE_REG(reg_address);
@@ -47,7 +47,7 @@ static int ade7759_spi_write_reg_16(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7759_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = ADE7759_WRITE_REG(reg_address);
@@ -64,7 +64,7 @@ static int ade7759_spi_read_reg_8(struct device *dev,
 		u8 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7759_state *st = iio_priv(indio_dev);
 	int ret;
 
 	ret = spi_w8r8(st->us, ADE7759_READ_REG(reg_address));
@@ -83,7 +83,7 @@ static int ade7759_spi_read_reg_16(struct device *dev,
 		u16 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7759_state *st = iio_priv(indio_dev);
 	int ret;
 
 	ret = spi_w8r16(st->us, ADE7759_READ_REG(reg_address));
@@ -105,7 +105,7 @@ static int ade7759_spi_read_reg_40(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7759_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -328,10 +328,11 @@ static int ade7759_stop_device(struct device *dev)
 	return ade7759_spi_write_reg_16(dev, ADE7759_MODE, val);
 }
 
-static int ade7759_initial_setup(struct ade7759_state *st)
+static int ade7759_initial_setup(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct device *dev = &st->indio_dev->dev;
+	struct ade7759_state *st = iio_priv(indio_dev);
+	struct device *dev = &indio_dev->dev;
 
 	/* use low spi speed for init */
 	st->us->mode = SPI_MODE_3;
@@ -376,7 +377,7 @@ static ssize_t ade7759_write_frequency(struct device *dev,
 		size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7759_state *st = iio_priv(indio_dev);
 	unsigned long val;
 	int ret;
 	u16 reg, t;
@@ -458,62 +459,41 @@ static const struct iio_info ade7759_info = {
 static int __devinit ade7759_probe(struct spi_device *spi)
 {
 	int ret;
-	struct ade7759_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
+	struct ade7759_state *st;
+	struct iio_dev *indio_dev;
+
+	/* setup the industrialio driver allocated elements */
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
 		goto error_ret;
 	}
 	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
+	spi_set_drvdata(spi, indio_dev);
 
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADE7759_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADE7759_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
+	st = iio_priv(indio_dev);
 	st->us = spi;
 	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
-
-	st->indio_dev->name = spi->dev.driver->name;
-	st->indio_dev->dev.parent = &spi->dev;
-
-	st->indio_dev->info = &ade7759_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &ade7759_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
 	/* Get the device into a sane initial state */
-	ret = ade7759_initial_setup(st);
+	ret = ade7759_initial_setup(indio_dev);
 	if (ret)
 		goto error_unreg_dev;
 	return 0;
 
 
 error_unreg_dev:
-	iio_device_unregister(st->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_dev:
-	iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
+	iio_free_device(indio_dev);
 error_ret:
 	return ret;
 }
@@ -522,19 +502,13 @@ error_ret:
 static int ade7759_remove(struct spi_device *spi)
 {
 	int ret;
-	struct ade7759_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	ret = ade7759_stop_device(&(indio_dev->dev));
 	if (ret)
 		goto err_ret;
 
 	iio_device_unregister(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
-
-	return 0;
 
 err_ret:
 	return ret;
diff --git a/drivers/staging/iio/meter/ade7759.h b/drivers/staging/iio/meter/ade7759.h
index cc76c2c..c81d23d 100644
--- a/drivers/staging/iio/meter/ade7759.h
+++ b/drivers/staging/iio/meter/ade7759.h
@@ -41,17 +41,15 @@
 /**
  * struct ade7759_state - device instance specific data
  * @us:			actual spi_device
- * @indio_dev:		industrial I/O device structure
+ * @buf_lock:		mutex to protect tx and rx
  * @tx:			transmit buffer
  * @rx:			receive buffer
- * @buf_lock:		mutex to protect tx and rx
  **/
 struct ade7759_state {
-	struct spi_device		*us;
-	struct iio_dev			*indio_dev;
-	u8				*tx;
-	u8				*rx;
-	struct mutex			buf_lock;
+	struct spi_device	*us;
+	struct mutex		buf_lock;
+	u8			tx[ADE7759_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADE7759_MAX_RX];
 };
 
 #endif
diff --git a/drivers/staging/iio/meter/ade7854-i2c.c b/drivers/staging/iio/meter/ade7854-i2c.c
index 4578e7b..dd72343 100644
--- a/drivers/staging/iio/meter/ade7854-i2c.c
+++ b/drivers/staging/iio/meter/ade7854-i2c.c
@@ -20,7 +20,7 @@ static int ade7854_i2c_write_reg_8(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = (reg_address >> 8) & 0xFF;
@@ -39,7 +39,7 @@ static int ade7854_i2c_write_reg_16(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = (reg_address >> 8) & 0xFF;
@@ -59,7 +59,7 @@ static int ade7854_i2c_write_reg_24(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = (reg_address >> 8) & 0xFF;
@@ -80,7 +80,7 @@ static int ade7854_i2c_write_reg_32(struct device *dev,
 {
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->buf_lock);
 	st->tx[0] = (reg_address >> 8) & 0xFF;
@@ -101,7 +101,7 @@ static int ade7854_i2c_read_reg_8(struct device *dev,
 		u8 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	int ret;
 
 	mutex_lock(&st->buf_lock);
@@ -127,7 +127,7 @@ static int ade7854_i2c_read_reg_16(struct device *dev,
 		u16 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	int ret;
 
 	mutex_lock(&st->buf_lock);
@@ -153,7 +153,7 @@ static int ade7854_i2c_read_reg_24(struct device *dev,
 		u32 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	int ret;
 
 	mutex_lock(&st->buf_lock);
@@ -179,7 +179,7 @@ static int ade7854_i2c_read_reg_32(struct device *dev,
 		u32 *val)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	int ret;
 
 	mutex_lock(&st->buf_lock);
@@ -204,13 +204,14 @@ static int __devinit ade7854_i2c_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	int ret;
-	struct ade7854_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
-		return ret;
-	}
-
-	i2c_set_clientdata(client, st);
+	struct ade7854_state *st;
+	struct iio_dev *indio_dev;
+
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+	st = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
 	st->read_reg_8 = ade7854_i2c_read_reg_8;
 	st->read_reg_16 = ade7854_i2c_read_reg_16;
 	st->read_reg_24 = ade7854_i2c_read_reg_24;
@@ -222,11 +223,9 @@ static int __devinit ade7854_i2c_probe(struct i2c_client *client,
 	st->i2c = client;
 	st->irq = client->irq;
 
-	ret = ade7854_probe(st, &client->dev);
-	if (ret) {
-		kfree(st);
-		return ret;
-	}
+	ret = ade7854_probe(indio_dev, &client->dev);
+	if (ret)
+		iio_free_device(indio_dev);
 
 	return ret;
 }
diff --git a/drivers/staging/iio/meter/ade7854-spi.c b/drivers/staging/iio/meter/ade7854-spi.c
index 84da8fb..e0d1086 100644
--- a/drivers/staging/iio/meter/ade7854-spi.c
+++ b/drivers/staging/iio/meter/ade7854-spi.c
@@ -21,7 +21,7 @@ static int ade7854_spi_write_reg_8(struct device *dev,
 	int ret;
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfer = {
 		.tx_buf = st->tx,
 		.bits_per_word = 8,
@@ -49,7 +49,7 @@ static int ade7854_spi_write_reg_16(struct device *dev,
 	int ret;
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfer = {
 		.tx_buf = st->tx,
 		.bits_per_word = 8,
@@ -78,7 +78,7 @@ static int ade7854_spi_write_reg_24(struct device *dev,
 	int ret;
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfer = {
 		.tx_buf = st->tx,
 		.bits_per_word = 8,
@@ -108,7 +108,7 @@ static int ade7854_spi_write_reg_32(struct device *dev,
 	int ret;
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	struct spi_transfer xfer = {
 		.tx_buf = st->tx,
 		.bits_per_word = 8,
@@ -138,7 +138,7 @@ static int ade7854_spi_read_reg_8(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -180,7 +180,7 @@ static int ade7854_spi_read_reg_16(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -221,7 +221,7 @@ static int ade7854_spi_read_reg_24(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -263,7 +263,7 @@ static int ade7854_spi_read_reg_32(struct device *dev,
 {
 	struct spi_message msg;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
@@ -302,13 +302,14 @@ error_ret:
 static int __devinit ade7854_spi_probe(struct spi_device *spi)
 {
 	int ret;
-	struct ade7854_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
-		return ret;
-	}
-
-	spi_set_drvdata(spi, st);
+	struct ade7854_state *st;
+	struct iio_dev *indio_dev;
+
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
 	st->read_reg_8 = ade7854_spi_read_reg_8;
 	st->read_reg_16 = ade7854_spi_read_reg_16;
 	st->read_reg_24 = ade7854_spi_read_reg_24;
@@ -320,11 +321,10 @@ static int __devinit ade7854_spi_probe(struct spi_device *spi)
 	st->irq = spi->irq;
 	st->spi = spi;
 
-	ret = ade7854_probe(st, &spi->dev);
-	if (ret) {
-		kfree(st);
-		return ret;
-	}
+
+	ret = ade7854_probe(indio_dev, &spi->dev);
+	if (ret)
+		iio_free_device(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/meter/ade7854.c b/drivers/staging/iio/meter/ade7854.c
index 44cd3ec..b82659f 100644
--- a/drivers/staging/iio/meter/ade7854.c
+++ b/drivers/staging/iio/meter/ade7854.c
@@ -29,7 +29,7 @@ static ssize_t ade7854_read_8bit(struct device *dev,
 	int ret;
 	u8 val = 0;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	ret = st->read_reg_8(dev, this_attr->address, &val);
@@ -46,7 +46,7 @@ static ssize_t ade7854_read_16bit(struct device *dev,
 	int ret;
 	u16 val = 0;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	ret = st->read_reg_16(dev, this_attr->address, &val);
@@ -63,7 +63,7 @@ static ssize_t ade7854_read_24bit(struct device *dev,
 	int ret;
 	u32 val;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
 	ret = st->read_reg_24(dev, this_attr->address, &val);
@@ -81,7 +81,7 @@ static ssize_t ade7854_read_32bit(struct device *dev,
 	u32 val = 0;
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	ret = st->read_reg_32(dev, this_attr->address, &val);
 	if (ret)
@@ -97,7 +97,7 @@ static ssize_t ade7854_write_8bit(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	int ret;
 	long val;
@@ -118,7 +118,7 @@ static ssize_t ade7854_write_16bit(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	int ret;
 	long val;
@@ -139,7 +139,7 @@ static ssize_t ade7854_write_24bit(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	int ret;
 	long val;
@@ -160,7 +160,7 @@ static ssize_t ade7854_write_32bit(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	int ret;
 	long val;
@@ -177,7 +177,7 @@ error_ret:
 static int ade7854_reset(struct device *dev)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	u16 val;
 
 	st->read_reg_16(dev, ADE7854_CONFIG, &val);
@@ -426,7 +426,7 @@ static IIO_DEV_ATTR_CVAHR(ade7854_read_32bit,
 static int ade7854_set_irq(struct device *dev, bool enable)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ade7854_state *st = iio_dev_get_devdata(indio_dev);
+	struct ade7854_state *st = iio_priv(indio_dev);
 
 	int ret;
 	u32 irqen;
@@ -449,10 +449,10 @@ error_ret:
 	return ret;
 }
 
-static int ade7854_initial_setup(struct ade7854_state *st)
+static int ade7854_initial_setup(struct iio_dev *indio_dev)
 {
 	int ret;
-	struct device *dev = &st->indio_dev->dev;
+	struct device *dev = &indio_dev->dev;
 
 	/* Disable IRQ */
 	ret = ade7854_set_irq(dev, false);
@@ -556,68 +556,40 @@ static const struct iio_info ade7854_info = {
 	.driver_module = THIS_MODULE,
 };
 
-int ade7854_probe(struct ade7854_state *st, struct device *dev)
+int ade7854_probe(struct iio_dev *indio_dev, struct device *dev)
 {
 	int ret;
-
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADE7854_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADE7854_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
-	mutex_init(&st->buf_lock);
+	struct ade7854_state *st = iio_priv(indio_dev);
 	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device(0);
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
+	mutex_init(&st->buf_lock);
 
-	st->indio_dev->dev.parent = dev;
-	st->indio_dev->info = &ade7854_info;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->dev.parent = dev;
+	indio_dev->info = &ade7854_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->indio_dev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
 	/* Get the device into a sane initial state */
-	ret = ade7854_initial_setup(st);
+	ret = ade7854_initial_setup(indio_dev);
 	if (ret)
 		goto error_unreg_dev;
 
 	return 0;
 
 error_unreg_dev:
-	iio_device_unregister(st->indio_dev);
+	iio_device_unregister(indio_dev);
 error_free_dev:
-	iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
-
+	iio_free_device(indio_dev);
+error_ret:
 	return ret;
 }
 EXPORT_SYMBOL(ade7854_probe);
 
-int ade7854_remove(struct ade7854_state *st)
+int ade7854_remove(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = st->indio_dev;
-
 	iio_device_unregister(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/meter/ade7854.h b/drivers/staging/iio/meter/ade7854.h
index 79a2110..2c96e86 100644
--- a/drivers/staging/iio/meter/ade7854.h
+++ b/drivers/staging/iio/meter/ade7854.h
@@ -148,29 +148,29 @@
  * struct ade7854_state - device instance specific data
  * @spi:			actual spi_device
  * @indio_dev:		industrial I/O device structure
+ * @buf_lock:		mutex to protect tx and rx
  * @tx:			transmit buffer
  * @rx:			receive buffer
- * @buf_lock:		mutex to protect tx and rx
  **/
 struct ade7854_state {
-	struct spi_device		*spi;
-	struct i2c_client               *i2c;
-	struct iio_dev			*indio_dev;
-	u8				*tx;
-	u8				*rx;
-	int				(*read_reg_8) (struct device *, u16, u8 *);
-	int				(*read_reg_16) (struct device *, u16, u16 *);
-	int				(*read_reg_24) (struct device *, u16, u32 *);
-	int				(*read_reg_32) (struct device *, u16, u32 *);
-	int				(*write_reg_8) (struct device *, u16, u8);
-	int				(*write_reg_16) (struct device *, u16, u16);
-	int				(*write_reg_24) (struct device *, u16, u32);
-	int				(*write_reg_32) (struct device *, u16, u32);
-	int                             irq;
-	struct mutex			buf_lock;
+	struct spi_device	*spi;
+	struct i2c_client	*i2c;
+	int			(*read_reg_8) (struct device *, u16, u8 *);
+	int			(*read_reg_16) (struct device *, u16, u16 *);
+	int			(*read_reg_24) (struct device *, u16, u32 *);
+	int			(*read_reg_32) (struct device *, u16, u32 *);
+	int			(*write_reg_8) (struct device *, u16, u8);
+	int			(*write_reg_16) (struct device *, u16, u16);
+	int			(*write_reg_24) (struct device *, u16, u32);
+	int			(*write_reg_32) (struct device *, u16, u32);
+	int			irq;
+	struct mutex		buf_lock;
+	u8			tx[ADE7854_MAX_TX] ____cacheline_aligned;
+	u8			rx[ADE7854_MAX_RX];
+
 };
 
-extern int ade7854_probe(struct ade7854_state *st, struct device *dev);
-extern int ade7854_remove(struct ade7854_state *st);
+extern int ade7854_probe(struct iio_dev *indio_dev, struct device *dev);
+extern int ade7854_remove(struct iio_dev *indio_dev);
 
 #endif
diff --git a/drivers/staging/iio/resolver/Kconfig b/drivers/staging/iio/resolver/Kconfig
index a4a3634..6ecd79e 100644
--- a/drivers/staging/iio/resolver/Kconfig
+++ b/drivers/staging/iio/resolver/Kconfig
@@ -25,30 +25,3 @@ config AD2S1210
 	  Say yes here to build support for Analog Devices spi resolver
 	  to digital converters, ad2s1210, provides direct access via sysfs.
 
-choice
-	prompt "Resolution Control"
-	depends on AD2S1210
-	default AD2S1210_GPIO_NONE
-	help
-	  In normal mode, the resolution of the digital output is selected
-	  using the RES0 and RES1 input pins. In configuration mode, the
-	  resolution is selected by setting the RES0 and RES1 bits in the
-	  control regsiter. When switching between normal mode and configuration
-	  mode, there are some schemes to keep them matchs.
-
-config AD2S1210_GPIO_INPUT
-	bool "read resolution from gpio pins"
-	help
-	  GPIO pins are sampling RES0 and RES1 pins, read the resolution
-	  settings from the GPIO pins.
-
-config AD2S1210_GPIO_OUTPUT
-	bool "set gpio pins to set resolution"
-	help
-	  RES0 and RES1 pins are controlled by GPIOs, setting GPIO pins to
-	  set the resolution.
-
-config AD2S1210_GPIO_NONE
-	bool "take the responsibility by user"
-
-endchoice
diff --git a/drivers/staging/iio/resolver/ad2s120x.c b/drivers/staging/iio/resolver/ad2s120x.c
index f83e142..bed4c72 100644
--- a/drivers/staging/iio/resolver/ad2s120x.c
+++ b/drivers/staging/iio/resolver/ad2s120x.c
@@ -32,161 +32,46 @@
 
 struct ad2s120x_state {
 	struct mutex lock;
-	struct iio_dev *idev;
 	struct spi_device *sdev;
-	unsigned short sample;
-	unsigned short rdvel;
-	u8 rx[2];
-	u8 tx[2];
+	int sample;
+	int rdvel;
+	u8 rx[2] ____cacheline_aligned;
 };
 
-static ssize_t ad2s120x_show_pos_vel(struct device *dev,
+static ssize_t ad2s120x_show_val(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
-	struct spi_message msg;
-	struct spi_transfer xfer;
 	int ret = 0;
 	ssize_t len = 0;
 	u16 pos;
 	s16 vel;
 	u8 status;
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s120x_state *st = idev->dev_data;
+	struct ad2s120x_state *st = iio_priv(dev_get_drvdata(dev));
+	struct iio_dev_attr *iattr = to_iio_dev_attr(attr);
 
-	xfer.len = 1;
-	xfer.tx_buf = st->tx;
-	xfer.rx_buf = st->rx;
 	mutex_lock(&st->lock);
 
 	gpio_set_value(st->sample, 0);
 	/* delay (6 * AD2S120X_TSCLK + 20) nano seconds */
 	udelay(1);
 	gpio_set_value(st->sample, 1);
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
-	if (ret)
-		goto error_ret;
-	status = st->rx[1];
-	pos = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
-	len = sprintf(buf, "%d %c%c%c%c ", pos,
-				(status & 0x8) ? 'P' : 'V',
-				(status & 0x4) ? 'd' : '_',
-				(status & 0x2) ? 'l' : '_',
-				(status & 0x1) ? '1' : '0');
-
-	/* delay 18 ns */
-	/* ndelay(18); */
-
-	gpio_set_value(st->rdvel, 0);
-	/* ndelay(5);*/
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
-	if (ret)
+	gpio_set_value(st->rdvel, iattr->address);
+	ret = spi_read(st->sdev, st->rx, 2);
+	if (ret < 0)
 		goto error_ret;
 	status = st->rx[1];
-	vel = (st->rx[0] & 0x80) ? 0xf000 : 0;
-	vel |= (((s16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
-	len += sprintf(buf + len, "%d %c%c%c%c\n", vel,
-				(status & 0x8) ? 'P' : 'V',
-				(status & 0x4) ? 'd' : '_',
-				(status & 0x2) ? 'l' : '_',
-				(status & 0x1) ? '1' : '0');
-error_ret:
-	gpio_set_value(st->rdvel, 1);
-	/* delay (2 * AD2S120X_TSCLK + 20) ns for sample pulse */
-	udelay(1);
-	mutex_unlock(&st->lock);
-
-	return ret ? ret : len;
-}
-
-static ssize_t ad2s120x_show_pos(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	struct spi_message msg;
-	struct spi_transfer xfer;
-	int ret = 0;
-	ssize_t len = 0;
-	u16 pos;
-	u8 status;
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s120x_state *st = idev->dev_data;
-
-	xfer.len = 1;
-	xfer.tx_buf = st->tx;
-	xfer.rx_buf = st->rx;
-	mutex_lock(&st->lock);
-
-	gpio_set_value(st->sample, 0);
-	/* delay (6 * AD2S120X_TSCLK + 20) nano seconds */
-	udelay(1);
-	gpio_set_value(st->sample, 1);
-	gpio_set_value(st->rdvel, 1);
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
-	if (ret)
-		goto error_ret;
-	status = st->rx[1];
-	pos = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
-	len = sprintf(buf, "%d %c%c%c%c ", pos,
-				(status & 0x8) ? 'P' : 'V',
-				(status & 0x4) ? 'd' : '_',
-				(status & 0x2) ? 'l' : '_',
-				(status & 0x1) ? '1' : '0');
-error_ret:
-	/* delay (2 * AD2S120X_TSCLK + 20) ns for sample pulse */
-	udelay(1);
-	mutex_unlock(&st->lock);
-
-	return ret ? ret : len;
-}
-
-static ssize_t ad2s120x_show_vel(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	struct spi_message msg;
-	struct spi_transfer xfer;
-	int ret = 0;
-	ssize_t len = 0;
-	s16 vel;
-	u8 status;
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s120x_state *st = idev->dev_data;
-
-	xfer.len = 1;
-	xfer.tx_buf = st->tx;
-	xfer.rx_buf = st->rx;
-	mutex_lock(&st->lock);
-
-	gpio_set_value(st->sample, 0);
-	/* delay (6 * AD2S120X_TSCLK + 20) nano seconds */
-	udelay(1);
-	gpio_set_value(st->sample, 1);
-
-	gpio_set_value(st->rdvel, 0);
-	/* ndelay(5);*/
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
-	if (ret)
-		goto error_ret;
-	status = st->rx[1];
-	vel = (st->rx[0] & 0x80) ? 0xf000 : 0;
-	vel |= (((s16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
-	len += sprintf(buf + len, "%d %c%c%c%c\n", vel,
+	if (iattr->address)
+		pos = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
+	else {
+		vel = (st->rx[0] & 0x80) ? 0xf000 : 0;
+		vel |= (((s16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
+	}
+	len = sprintf(buf, "%d %c%c%c%c ", iattr->address ? pos : vel,
 				(status & 0x8) ? 'P' : 'V',
 				(status & 0x4) ? 'd' : '_',
 				(status & 0x2) ? 'l' : '_',
 				(status & 0x1) ? '1' : '0');
 error_ret:
-	gpio_set_value(st->rdvel, 1);
 	/* delay (2 * AD2S120X_TSCLK + 20) ns for sample pulse */
 	udelay(1);
 	mutex_unlock(&st->lock);
@@ -194,15 +79,10 @@ error_ret:
 	return ret ? ret : len;
 }
 
-static IIO_CONST_ATTR(description,
-	"12-Bit R/D Converter with Reference Oscillator");
-static IIO_DEVICE_ATTR(pos_vel, S_IRUGO, ad2s120x_show_pos_vel, NULL, 0);
-static IIO_DEVICE_ATTR(pos, S_IRUGO, ad2s120x_show_pos, NULL, 0);
-static IIO_DEVICE_ATTR(vel, S_IRUGO, ad2s120x_show_vel, NULL, 0);
+static IIO_DEVICE_ATTR(pos, S_IRUGO, ad2s120x_show_val, NULL, 1);
+static IIO_DEVICE_ATTR(vel, S_IRUGO, ad2s120x_show_val, NULL, 0);
 
 static struct attribute *ad2s120x_attributes[] = {
-	&iio_const_attr_description.dev_attr.attr,
-	&iio_dev_attr_pos_vel.dev_attr.attr,
 	&iio_dev_attr_pos.dev_attr.attr,
 	&iio_dev_attr_vel.dev_attr.attr,
 	NULL,
@@ -220,42 +100,33 @@ static const struct iio_info ad2s120x_info = {
 static int __devinit ad2s120x_probe(struct spi_device *spi)
 {
 	struct ad2s120x_state *st;
+	struct iio_dev *indio_dev;
 	int pn, ret = 0;
 	unsigned short *pins = spi->dev.platform_data;
 
-	for (pn = 0; pn < AD2S120X_PN; pn++) {
-		if (gpio_request(pins[pn], DRV_NAME)) {
+	for (pn = 0; pn < AD2S120X_PN; pn++)
+		if (gpio_request_one(pins[pn], GPIOF_DIR_OUT, DRV_NAME)) {
 			pr_err("%s: request gpio pin %d failed\n",
 						DRV_NAME, pins[pn]);
 			goto error_ret;
 		}
-		gpio_direction_output(pins[pn], 1);
-	}
-
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
-
+	spi_set_drvdata(spi, indio_dev);
+	st = iio_priv(indio_dev);
 	mutex_init(&st->lock);
 	st->sdev = spi;
 	st->sample = pins[0];
 	st->rdvel = pins[1];
 
-	st->idev = iio_allocate_device(0);
-	if (st->idev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->idev->dev.parent = &spi->dev;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &ad2s120x_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	st->idev->info = &ad2s120x_info;
-	st->idev->dev_data = (void *)(st);
-	st->idev->modes = INDIO_DIRECT_MODE;
-
-	ret = iio_device_register(st->idev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_free_dev;
 
@@ -266,9 +137,7 @@ static int __devinit ad2s120x_probe(struct spi_device *spi)
 	return 0;
 
 error_free_dev:
-	iio_free_device(st->idev);
-error_free_st:
-	kfree(st);
+	iio_free_device(indio_dev);
 error_ret:
 	for (--pn; pn >= 0; pn--)
 		gpio_free(pins[pn]);
@@ -277,10 +146,7 @@ error_ret:
 
 static int __devexit ad2s120x_remove(struct spi_device *spi)
 {
-	struct ad2s120x_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->idev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index 09f4fcf..ecaf7bb 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -19,44 +19,41 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "ad2s1210.h"
 
 #define DRV_NAME "ad2s1210"
 
-#define DEF_CONTROL		0x7E
-
-#define MSB_IS_HIGH		0x80
-#define MSB_IS_LOW		0x7F
-#define PHASE_LOCK_RANGE_44	0x20
-#define ENABLE_HYSTERESIS	0x10
-#define SET_ENRES1		0x08
-#define SET_ENRES0		0x04
-#define SET_RES1		0x02
-#define SET_RES0		0x01
-
-#define SET_ENRESOLUTION	(SET_ENRES1 | SET_ENRES0)
-#define SET_RESOLUTION		(SET_RES1 | SET_RES0)
-
-#define REG_POSITION		0x80
-#define REG_VELOCITY		0x82
-#define REG_LOS_THRD		0x88
-#define REG_DOS_OVR_THRD	0x89
-#define REG_DOS_MIS_THRD	0x8A
-#define REG_DOS_RST_MAX_THRD	0x8B
-#define REG_DOS_RST_MIN_THRD	0x8C
-#define REG_LOT_HIGH_THRD	0x8D
-#define REG_LOT_LOW_THRD	0x8E
-#define REG_EXCIT_FREQ		0x91
-#define REG_CONTROL		0x92
-#define REG_SOFT_RESET		0xF0
-#define REG_FAULT		0xFF
+#define AD2S1210_DEF_CONTROL		0x7E
+
+#define AD2S1210_MSB_IS_HIGH		0x80
+#define AD2S1210_MSB_IS_LOW		0x7F
+#define AD2S1210_PHASE_LOCK_RANGE_44	0x20
+#define AD2S1210_ENABLE_HYSTERESIS	0x10
+#define AD2S1210_SET_ENRES1		0x08
+#define AD2S1210_SET_ENRES0		0x04
+#define AD2S1210_SET_RES1		0x02
+#define AD2S1210_SET_RES0		0x01
+
+#define AD2S1210_SET_ENRESOLUTION	(AD2S1210_SET_ENRES1 |	\
+					 AD2S1210_SET_ENRES0)
+#define AD2S1210_SET_RESOLUTION		(AD2S1210_SET_RES1 | AD2S1210_SET_RES0)
+
+#define AD2S1210_REG_POSITION		0x80
+#define AD2S1210_REG_VELOCITY		0x82
+#define AD2S1210_REG_LOS_THRD		0x88
+#define AD2S1210_REG_DOS_OVR_THRD	0x89
+#define AD2S1210_REG_DOS_MIS_THRD	0x8A
+#define AD2S1210_REG_DOS_RST_MAX_THRD	0x8B
+#define AD2S1210_REG_DOS_RST_MIN_THRD	0x8C
+#define AD2S1210_REG_LOT_HIGH_THRD	0x8D
+#define AD2S1210_REG_LOT_LOW_THRD	0x8E
+#define AD2S1210_REG_EXCIT_FREQ		0x91
+#define AD2S1210_REG_CONTROL		0x92
+#define AD2S1210_REG_SOFT_RESET		0xF0
+#define AD2S1210_REG_FAULT		0xFF
 
 /* pin SAMPLE, A0, A1, RES0, RES1, is controlled by driver */
 #define AD2S1210_SAA		3
-#if defined(CONFIG_AD2S1210_GPIO_INPUT) || defined(CONFIG_AD2S1210_GPIO_OUTPUT)
-# define AD2S1210_RES		2
-#else
-# define AD2S1210_RES		0
-#endif
 #define AD2S1210_PN		(AD2S1210_SAA + AD2S1210_RES)
 
 #define AD2S1210_MIN_CLKIN	6144000
@@ -75,190 +72,153 @@
 enum ad2s1210_mode {
 	MOD_POS = 0,
 	MOD_VEL,
-	MOD_RESERVED,
 	MOD_CONFIG,
+	MOD_RESERVED,
 };
 
-enum ad2s1210_res {
-	RES_10 = 10,
-	RES_12 = 12,
-	RES_14 = 14,
-	RES_16 = 16,
-};
-
-static unsigned int resolution_value[] = {
-		RES_10, RES_12, RES_14, RES_16};
+static const unsigned int ad2s1210_resolution_value[] = { 10, 12, 14, 16 };
 
 struct ad2s1210_state {
+	const struct ad2s1210_platform_data *pdata;
 	struct mutex lock;
-	struct iio_dev *idev;
 	struct spi_device *sdev;
-	struct spi_transfer xfer;
-	unsigned int hysteresis;
-	unsigned int old_data;
-	enum ad2s1210_mode mode;
-	enum ad2s1210_res resolution;
 	unsigned int fclkin;
 	unsigned int fexcit;
-	unsigned short sample;
-	unsigned short a0;
-	unsigned short a1;
-	unsigned short res0;
-	unsigned short res1;
-	u8 rx[3];
-	u8 tx[3];
+	bool hysteresis;
+	bool old_data;
+	u8 resolution;
+	enum ad2s1210_mode mode;
+	u8 rx[2] ____cacheline_aligned;
+	u8 tx[2] ____cacheline_aligned;
 };
 
-static inline void start_sample(struct ad2s1210_state *st)
-{
-	gpio_set_value(st->sample, 0);
-}
-
-static inline void stop_sample(struct ad2s1210_state *st)
-{
-	gpio_set_value(st->sample, 1);
-}
-
-static inline void set_mode(enum ad2s1210_mode mode, struct ad2s1210_state *st)
+static const int ad2s1210_mode_vals[4][2] = {
+	[MOD_POS] = { 0, 0 },
+	[MOD_VEL] = { 0, 1 },
+	[MOD_CONFIG] = { 1, 0 },
+};
+static inline void ad2s1210_set_mode(enum ad2s1210_mode mode,
+				     struct ad2s1210_state *st)
 {
-	switch (mode) {
-	case MOD_POS:
-		gpio_set_value(st->a0, 0);
-		gpio_set_value(st->a1, 0);
-		break;
-	case MOD_VEL:
-		gpio_set_value(st->a0, 0);
-		gpio_set_value(st->a1, 1);
-		break;
-	case MOD_CONFIG:
-		gpio_set_value(st->a0, 1);
-		gpio_set_value(st->a1, 1);
-		break;
-	default:
-		/* set to reserved mode */
-		gpio_set_value(st->a0, 1);
-		gpio_set_value(st->a1, 0);
-	}
+	gpio_set_value(st->pdata->a[0], ad2s1210_mode_vals[mode][0]);
+	gpio_set_value(st->pdata->a[1], ad2s1210_mode_vals[mode][1]);
 	st->mode = mode;
 }
 
 /* write 1 bytes (address or data) to the chip */
-static int config_write(struct ad2s1210_state *st,
-					unsigned char data)
+static int ad2s1210_config_write(struct ad2s1210_state *st, u8 data)
 {
-	struct spi_message msg;
-	int ret = 0;
-
-	st->xfer.len = 1;
-	set_mode(MOD_CONFIG, st);
+	int ret;
 
-	spi_message_init(&msg);
-	spi_message_add_tail(&st->xfer, &msg);
+	ad2s1210_set_mode(MOD_CONFIG, st);
 	st->tx[0] = data;
-	ret = spi_sync(st->sdev, &msg);
-	if (ret)
+	ret = spi_write(st->sdev, st->tx, 1);
+	if (ret < 0)
 		return ret;
-	st->old_data = 1;
-	return ret;
+	st->old_data = true;
+
+	return 0;
 }
 
 /* read value from one of the registers */
-static int config_read(struct ad2s1210_state *st,
-				unsigned char address,
-					unsigned char *data)
-{
+static int ad2s1210_config_read(struct ad2s1210_state *st,
+		       unsigned char address)
+{
+	struct spi_transfer xfer = {
+		.len = 2,
+		.rx_buf = st->rx,
+		.tx_buf = st->tx,
+	};
 	struct spi_message msg;
 	int ret = 0;
 
-	st->xfer.len = 2;
-	set_mode(MOD_CONFIG, st);
-
+	ad2s1210_set_mode(MOD_CONFIG, st);
 	spi_message_init(&msg);
-	spi_message_add_tail(&st->xfer, &msg);
-	st->tx[0] = address | MSB_IS_HIGH;
-	st->tx[1] = REG_FAULT;
+	spi_message_add_tail(&xfer, &msg);
+	st->tx[0] = address | AD2S1210_MSB_IS_HIGH;
+	st->tx[1] = AD2S1210_REG_FAULT;
 	ret = spi_sync(st->sdev, &msg);
-	if (ret)
+	if (ret < 0)
 		return ret;
-	*data = st->rx[1];
-	st->old_data = 1;
-	return ret;
+	st->old_data = true;
+
+	return st->rx[1];
 }
 
-static inline void update_frequency_control_word(struct ad2s1210_state *st)
+static inline
+int ad2s1210_update_frequency_control_word(struct ad2s1210_state *st)
 {
+	int ret;
 	unsigned char fcw;
+
 	fcw = (unsigned char)(st->fexcit * (1 << 15) / st->fclkin);
-	if (fcw >= AD2S1210_MIN_FCW && fcw <= AD2S1210_MAX_FCW) {
-		config_write(st, REG_EXCIT_FREQ);
-		config_write(st, fcw);
-	} else
+	if (fcw < AD2S1210_MIN_FCW || fcw > AD2S1210_MAX_FCW) {
 		pr_err("ad2s1210: FCW out of range\n");
+		return -ERANGE;
+	}
+
+	ret = ad2s1210_config_write(st, AD2S1210_REG_EXCIT_FREQ);
+	if (ret < 0)
+		return ret;
+
+	return ad2s1210_config_write(st, fcw);
 }
 
-#if defined(CONFIG_AD2S1210_GPIO_INPUT)
-static inline unsigned char read_resolution_pin(struct ad2s1210_state *st)
+static unsigned char ad2s1210_read_resolution_pin(struct ad2s1210_state *st)
 {
-	unsigned int data;
-	data = (gpio_get_value(st->res0) << 1)  |
-			gpio_get_value(st->res1);
-	return resolution_value[data];
+	return ad2s1210_resolution_value[
+		(gpio_get_value(st->pdata->res[0]) << 1) |
+		gpio_get_value(st->pdata->res[1])];
 }
-#elif defined(CONFIG_AD2S1210_GPIO_OUTPUT)
-static inline void set_resolution_pin(struct ad2s1210_state *st)
+
+static const int ad2s1210_res_pins[4][2] = {
+	{ 0, 0 }, {0, 1}, {1, 0}, {1, 1}
+};
+
+static inline void ad2s1210_set_resolution_pin(struct ad2s1210_state *st)
 {
-	switch (st->resolution) {
-	case RES_10:
-		gpio_set_value(st->res0, 0);
-		gpio_set_value(st->res1, 0);
-		break;
-	case RES_12:
-		gpio_set_value(st->res0, 0);
-		gpio_set_value(st->res1, 1);
-		break;
-	case RES_14:
-		gpio_set_value(st->res0, 1);
-		gpio_set_value(st->res1, 0);
-		break;
-	case RES_16:
-		gpio_set_value(st->res0, 1);
-		gpio_set_value(st->res1, 1);
-		break;
-	}
+	gpio_set_value(st->pdata->res[0],
+		       ad2s1210_res_pins[(st->resolution - 10)/2][0]);
+	gpio_set_value(st->pdata->res[1],
+		       ad2s1210_res_pins[(st->resolution - 10)/2][1]);
 }
-#endif
 
-static inline void soft_reset(struct ad2s1210_state *st)
+static inline int ad2s1210_soft_reset(struct ad2s1210_state *st)
 {
-	config_write(st, REG_SOFT_RESET);
-	config_write(st, 0x0);
+	int ret;
+
+	ret = ad2s1210_config_write(st, AD2S1210_REG_SOFT_RESET);
+	if (ret < 0)
+		return ret;
+
+	return ad2s1210_config_write(st, 0x0);
 }
 
 
 /* return the OLD DATA since last spi bus write */
 static ssize_t ad2s1210_show_raw(struct device *dev,
-			struct device_attribute *attr, char *buf)
+				 struct device_attribute *attr,
+				 char *buf)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
-	int ret;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
+	int ret = 0;
 
 	mutex_lock(&st->lock);
 	if (st->old_data) {
 		ret = sprintf(buf, "0x%x\n", st->rx[0]);
-		st->old_data = 0;
-	} else
-		ret = 0;
+		st->old_data = false;
+	}
 	mutex_unlock(&st->lock);
+
 	return ret;
 }
 
 static ssize_t ad2s1210_store_raw(struct device *dev,
-		struct device_attribute *attr,
-		const char *buf, size_t len)
+				  struct device_attribute *attr,
+				  const char *buf,
+				  size_t len)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	unsigned long udata;
 	unsigned char data;
 	int ret;
@@ -266,139 +226,157 @@ static ssize_t ad2s1210_store_raw(struct device *dev,
 	ret = strict_strtoul(buf, 16, &udata);
 	if (ret)
 		return -EINVAL;
+
 	data = udata & 0xff;
 	mutex_lock(&st->lock);
-	config_write(st, data);
+	ret = ad2s1210_config_write(st, data);
 	mutex_unlock(&st->lock);
-	return 1;
+
+	return ret < 0 ? ret : len;
 }
 
 static ssize_t ad2s1210_store_softreset(struct device *dev,
-			struct device_attribute *attr,
-			const char *buf, size_t len)
+					struct device_attribute *attr,
+					const char *buf,
+					size_t len)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
+	int ret;
+
 	mutex_lock(&st->lock);
-	soft_reset(st);
+	ret = ad2s1210_soft_reset(st);
 	mutex_unlock(&st->lock);
-	return len;
+
+	return ret < 0 ? ret : len;
 }
 
 static ssize_t ad2s1210_show_fclkin(struct device *dev,
-			struct device_attribute *attr, char *buf)
+				    struct device_attribute *attr,
+				    char *buf)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	return sprintf(buf, "%d\n", st->fclkin);
 }
 
 static ssize_t ad2s1210_store_fclkin(struct device *dev,
-			struct device_attribute *attr,
-			const char *buf, size_t len)
+				     struct device_attribute *attr,
+				     const char *buf,
+				     size_t len)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	unsigned long fclkin;
 	int ret;
 
 	ret = strict_strtoul(buf, 10, &fclkin);
-	if (!ret && fclkin >= AD2S1210_MIN_CLKIN &&
-				fclkin <= AD2S1210_MAX_CLKIN) {
-		mutex_lock(&st->lock);
-		st->fclkin = fclkin;
-	} else {
+	if (ret)
+		return ret;
+	if (fclkin < AD2S1210_MIN_CLKIN || fclkin > AD2S1210_MAX_CLKIN) {
 		pr_err("ad2s1210: fclkin out of range\n");
 		return -EINVAL;
 	}
-	update_frequency_control_word(st);
-	soft_reset(st);
+
+	mutex_lock(&st->lock);
+	st->fclkin = fclkin;
+
+	ret = ad2s1210_update_frequency_control_word(st);
+	if (ret < 0)
+		goto error_ret;
+	ret = ad2s1210_soft_reset(st);
+error_ret:
 	mutex_unlock(&st->lock);
-	return len;
+
+	return ret < 0 ? ret : len;
 }
 
 static ssize_t ad2s1210_show_fexcit(struct device *dev,
-			struct device_attribute *attr, char *buf)
+				    struct device_attribute *attr,
+				    char *buf)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	return sprintf(buf, "%d\n", st->fexcit);
 }
 
 static ssize_t ad2s1210_store_fexcit(struct device *dev,
-			struct device_attribute *attr,
-			const char *buf, size_t len)
+				     struct device_attribute *attr,
+				     const char *buf, size_t len)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	unsigned long fexcit;
 	int ret;
 
 	ret = strict_strtoul(buf, 10, &fexcit);
-	if (!ret && fexcit >= AD2S1210_MIN_EXCIT &&
-				fexcit <= AD2S1210_MAX_EXCIT) {
-		mutex_lock(&st->lock);
-		st->fexcit = fexcit;
-	} else {
+	if (ret < 0)
+		return ret;
+	if (fexcit < AD2S1210_MIN_EXCIT || fexcit > AD2S1210_MAX_EXCIT) {
 		pr_err("ad2s1210: excitation frequency out of range\n");
 		return -EINVAL;
 	}
-	update_frequency_control_word(st);
-	soft_reset(st);
+	mutex_lock(&st->lock);
+	st->fexcit = fexcit;
+	ret = ad2s1210_update_frequency_control_word(st);
+	if (ret < 0)
+		goto error_ret;
+	ret = ad2s1210_soft_reset(st);
+error_ret:
 	mutex_unlock(&st->lock);
-	return len;
+
+	return ret < 0 ? ret : len;
 }
 
 static ssize_t ad2s1210_show_control(struct device *dev,
-			struct device_attribute *attr, char *buf)
+				     struct device_attribute *attr,
+				     char *buf)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
-	unsigned char data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
+	int ret;
 	mutex_lock(&st->lock);
-	config_read(st, REG_CONTROL, &data);
+	ret = ad2s1210_config_read(st, AD2S1210_REG_CONTROL);
 	mutex_unlock(&st->lock);
-	return sprintf(buf, "0x%x\n", data);
+	return ret < 0 ? ret : sprintf(buf, "0x%x\n", ret);
 }
 
 static ssize_t ad2s1210_store_control(struct device *dev,
 			struct device_attribute *attr,
 			const char *buf, size_t len)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	unsigned long udata;
 	unsigned char data;
 	int ret;
 
 	ret = strict_strtoul(buf, 16, &udata);
-	if (ret) {
-		ret = -EINVAL;
-		goto error_ret;
-	}
+	if (ret)
+		return -EINVAL;
+
 	mutex_lock(&st->lock);
-	config_write(st, REG_CONTROL);
-	data = udata & MSB_IS_LOW;
-	config_write(st, data);
-	config_read(st, REG_CONTROL, &data);
-	if (data & MSB_IS_HIGH) {
+	ret = ad2s1210_config_write(st, AD2S1210_REG_CONTROL);
+	if (ret < 0)
+		goto error_ret;
+	data = udata & AD2S1210_MSB_IS_LOW;
+	ret = ad2s1210_config_write(st, data);
+	if (ret < 0)
+		goto error_ret;
+
+	ret = ad2s1210_config_read(st, AD2S1210_REG_CONTROL);
+	if (ret < 0)
+		goto error_ret;
+	if (ret & AD2S1210_MSB_IS_HIGH) {
 		ret = -EIO;
 		pr_err("ad2s1210: write control register fail\n");
 		goto error_ret;
 	}
-	st->resolution = resolution_value[data & SET_RESOLUTION];
-#if defined(CONFIG_AD2S1210_GPIO_INPUT)
-	data = read_resolution_pin(st);
-	if (data != st->resolution)
-		pr_warning("ad2s1210: resolution settings not match\n");
-#elif defined(CONFIG_AD2S1210_GPIO_OUTPUT)
-	set_resolution_pin(st);
-#endif
+	st->resolution
+		= ad2s1210_resolution_value[data & AD2S1210_SET_RESOLUTION];
+	if (st->pdata->gpioin) {
+		data = ad2s1210_read_resolution_pin(st);
+		if (data != st->resolution)
+			pr_warning("ad2s1210: resolution settings not match\n");
+	} else
+		ad2s1210_set_resolution_pin(st);
+
 	ret = len;
-	if (data & ENABLE_HYSTERESIS)
-		st->hysteresis = 1;
-	else
-		st->hysteresis = 0;
+	st->hysteresis = !!(data & AD2S1210_ENABLE_HYSTERESIS);
+
 error_ret:
 	mutex_unlock(&st->lock);
 	return ret;
@@ -407,8 +385,7 @@ error_ret:
 static ssize_t ad2s1210_show_resolution(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	return sprintf(buf, "%d\n", st->resolution);
 }
 
@@ -416,103 +393,109 @@ static ssize_t ad2s1210_store_resolution(struct device *dev,
 			struct device_attribute *attr,
 			const char *buf, size_t len)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	unsigned char data;
 	unsigned long udata;
 	int ret;
 
 	ret = strict_strtoul(buf, 10, &udata);
-	if (ret || udata < RES_10 || udata > RES_16) {
+	if (ret || udata < 10 || udata > 16) {
 		pr_err("ad2s1210: resolution out of range\n");
 		return -EINVAL;
 	}
 	mutex_lock(&st->lock);
-	config_read(st, REG_CONTROL, &data);
-	data &= ~SET_RESOLUTION;
-	data |= (udata - RES_10) >> 1;
-	config_write(st, REG_CONTROL);
-	config_write(st, data & MSB_IS_LOW);
-	config_read(st, REG_CONTROL, &data);
-	if (data & MSB_IS_HIGH) {
+	ret = ad2s1210_config_read(st, AD2S1210_REG_CONTROL);
+	if (ret < 0)
+		goto error_ret;
+	data = ret;
+	data &= ~AD2S1210_SET_RESOLUTION;
+	data |= (udata - 10) >> 1;
+	ret = ad2s1210_config_write(st, AD2S1210_REG_CONTROL);
+	if (ret < 0)
+		goto error_ret;
+	ret = ad2s1210_config_write(st, data & AD2S1210_MSB_IS_LOW);
+	if (ret < 0)
+		goto error_ret;
+	ret = ad2s1210_config_read(st, AD2S1210_REG_CONTROL);
+	if (ret < 0)
+		goto error_ret;
+	data = ret;
+	if (data & AD2S1210_MSB_IS_HIGH) {
 		ret = -EIO;
 		pr_err("ad2s1210: setting resolution fail\n");
 		goto error_ret;
 	}
-	st->resolution = resolution_value[data & SET_RESOLUTION];
-#if defined(CONFIG_AD2S1210_GPIO_INPUT)
-	data = read_resolution_pin(st);
-	if (data != st->resolution)
-		pr_warning("ad2s1210: resolution settings not match\n");
-#elif defined(CONFIG_AD2S1210_GPIO_OUTPUT)
-	set_resolution_pin(st);
-#endif
+	st->resolution
+		= ad2s1210_resolution_value[data & AD2S1210_SET_RESOLUTION];
+	if (st->pdata->gpioin) {
+		data = ad2s1210_read_resolution_pin(st);
+		if (data != st->resolution)
+			pr_warning("ad2s1210: resolution settings not match\n");
+	} else
+		ad2s1210_set_resolution_pin(st);
 	ret = len;
 error_ret:
 	mutex_unlock(&st->lock);
 	return ret;
 }
+
 /* read the fault register since last sample */
 static ssize_t ad2s1210_show_fault(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
-	int ret = 0;
-	ssize_t len = 0;
-	unsigned char data;
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
+	int ret;
 
 	mutex_lock(&st->lock);
-	ret = config_read(st, REG_FAULT, &data);
-
-	if (ret)
-		goto error_ret;
-	len = sprintf(buf, "0x%x\n", data);
-error_ret:
+	ret = ad2s1210_config_read(st, AD2S1210_REG_FAULT);
 	mutex_unlock(&st->lock);
-	return ret ? ret : len;
+
+	return ret ? ret : sprintf(buf, "0x%x\n", ret);
 }
 
 static ssize_t ad2s1210_clear_fault(struct device *dev,
-			struct device_attribute *attr,
-			const char *buf, size_t len)
+				    struct device_attribute *attr,
+				    const char *buf,
+				    size_t len)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
-	unsigned char data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
+	int ret;
 
 	mutex_lock(&st->lock);
-	start_sample(st);
+	gpio_set_value(st->pdata->sample, 0);
 	/* delay (2 * tck + 20) nano seconds */
 	udelay(1);
-	stop_sample(st);
-	config_read(st, REG_FAULT, &data);
-	start_sample(st);
-	stop_sample(st);
+	gpio_set_value(st->pdata->sample, 1);
+	ret = ad2s1210_config_read(st, AD2S1210_REG_FAULT);
+	if (ret < 0)
+		goto error_ret;
+	gpio_set_value(st->pdata->sample, 0);
+	gpio_set_value(st->pdata->sample, 1);
+error_ret:
 	mutex_unlock(&st->lock);
 
-	return 0;
+	return ret < 0 ? ret : len;
 }
 
 static ssize_t ad2s1210_show_reg(struct device *dev,
-			struct device_attribute *attr, char *buf)
+				 struct device_attribute *attr,
+				 char *buf)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
-	unsigned char data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	struct iio_dev_attr *iattr = to_iio_dev_attr(attr);
+	int ret;
 
 	mutex_lock(&st->lock);
-	config_read(st, iattr->address, &data);
+	ret = ad2s1210_config_read(st, iattr->address);
 	mutex_unlock(&st->lock);
-	return sprintf(buf, "%d\n", data);
+
+	return ret < 0 ? ret : sprintf(buf, "%d\n", ret);
 }
 
 static ssize_t ad2s1210_store_reg(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t len)
 {
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 	unsigned long data;
 	int ret;
 	struct iio_dev_attr *iattr = to_iio_dev_attr(attr);
@@ -521,183 +504,121 @@ static ssize_t ad2s1210_store_reg(struct device *dev,
 	if (ret)
 		return -EINVAL;
 	mutex_lock(&st->lock);
-	config_write(st, iattr->address);
-	config_write(st, data & MSB_IS_LOW);
+	ret = ad2s1210_config_write(st, iattr->address);
+	if (ret < 0)
+		goto error_ret;
+	ret = ad2s1210_config_write(st, data & AD2S1210_MSB_IS_LOW);
+error_ret:
 	mutex_unlock(&st->lock);
-	return len;
+	return ret < 0 ? ret : len;
 }
 
 static ssize_t ad2s1210_show_pos(struct device *dev,
-			struct device_attribute *attr, char *buf)
+				 struct device_attribute *attr,
+				 char *buf)
 {
-	struct spi_message msg;
 	int ret = 0;
 	ssize_t len = 0;
 	u16 pos;
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 
-	st->xfer.len = 2;
 	mutex_lock(&st->lock);
-	start_sample(st);
+	gpio_set_value(st->pdata->sample, 0);
 	/* delay (6 * tck + 20) nano seconds */
 	udelay(1);
 
-	set_mode(MOD_POS, st);
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&st->xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
+	ad2s1210_set_mode(MOD_POS, st);
+	ret = spi_read(st->sdev, st->rx, 2);
 	if (ret)
 		goto error_ret;
-	pos = ((((u16)(st->rx[0])) << 8) | (st->rx[1]));
+	pos = be16_to_cpup((u16 *)st->rx);
 	if (st->hysteresis)
 		pos >>= 16 - st->resolution;
 	len = sprintf(buf, "%d\n", pos);
 error_ret:
-	stop_sample(st);
+	gpio_set_value(st->pdata->sample, 1);
 	/* delay (2 * tck + 20) nano seconds */
 	udelay(1);
 	mutex_unlock(&st->lock);
 
-	return ret ? ret : len;
+	return ret < 0 ? ret : len;
 }
 
 static ssize_t ad2s1210_show_vel(struct device *dev,
-			struct device_attribute *attr, char *buf)
+				 struct device_attribute *attr,
+				 char *buf)
 {
-	struct spi_message msg;
 	unsigned short negative;
 	int ret = 0;
 	ssize_t len = 0;
 	s16 vel;
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
+	struct ad2s1210_state *st = iio_priv(dev_get_drvdata(dev));
 
-	st->xfer.len = 2;
 	mutex_lock(&st->lock);
-	start_sample(st);
+	gpio_set_value(st->pdata->sample, 0);
 	/* delay (6 * tck + 20) nano seconds */
 	udelay(1);
 
-	set_mode(MOD_VEL, st);
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&st->xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
+	ad2s1210_set_mode(MOD_VEL, st);
+	ret = spi_read(st->sdev, st->rx, 2);
 	if (ret)
 		goto error_ret;
 	negative = st->rx[0] & 0x80;
-	vel = ((((s16)(st->rx[0])) << 8) | (st->rx[1]));
+	vel = be16_to_cpup((s16 *)st->rx);
 	vel >>= 16 - st->resolution;
-	if (negative) {
+	if (vel & 0x8000) {
 		negative = (0xffff >> st->resolution) << st->resolution;
 		vel |= negative;
 	}
 	len = sprintf(buf, "%d\n", vel);
 error_ret:
-	stop_sample(st);
+	gpio_set_value(st->pdata->sample, 1);
 	/* delay (2 * tck + 20) nano seconds */
 	udelay(1);
 	mutex_unlock(&st->lock);
 
-	return ret ? ret : len;
+	return ret < 0 ? ret : len;
 }
 
-static ssize_t ad2s1210_show_pos_vel(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	struct spi_message msg;
-	unsigned short negative;
-	int ret = 0;
-	ssize_t len = 0;
-	u16 pos;
-	s16 vel;
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s1210_state *st = idev->dev_data;
-
-	st->xfer.len = 2;
-	mutex_lock(&st->lock);
-	start_sample(st);
-	/* delay (6 * tck + 20) nano seconds */
-	udelay(1);
-
-	set_mode(MOD_POS, st);
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&st->xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
-	if (ret)
-		goto error_ret;
-	pos = ((((u16)(st->rx[0])) << 8) | (st->rx[1]));
-	if (st->hysteresis)
-		pos >>= 16 - st->resolution;
-	len = sprintf(buf, "%d ", pos);
-
-	st->xfer.len = 2;
-	set_mode(MOD_VEL, st);
-	spi_message_init(&msg);
-	spi_message_add_tail(&st->xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
-	if (ret)
-		goto error_ret;
-	negative = st->rx[0] & 0x80;
-	vel = ((((s16)(st->rx[0])) << 8) | (st->rx[1]));
-	vel >>= 16 - st->resolution;
-	if (negative) {
-		negative = (0xffff >> st->resolution) << st->resolution;
-		vel |= negative;
-	}
-	len += sprintf(buf + len, "%d\n", vel);
-error_ret:
-	stop_sample(st);
-	/* delay (2 * tck + 20) nano seconds */
-	udelay(1);
-	mutex_unlock(&st->lock);
-
-	return ret ? ret : len;
-}
-
-static IIO_CONST_ATTR(description,
-	"Variable Resolution, 10-Bit to 16Bit R/D\n\
-Converter with Reference Oscillator");
 static IIO_DEVICE_ATTR(raw_io, S_IRUGO | S_IWUSR,
-		ad2s1210_show_raw, ad2s1210_store_raw, 0);
+		       ad2s1210_show_raw, ad2s1210_store_raw, 0);
 static IIO_DEVICE_ATTR(reset, S_IWUSR,
-		NULL, ad2s1210_store_softreset, 0);
+		       NULL, ad2s1210_store_softreset, 0);
 static IIO_DEVICE_ATTR(fclkin, S_IRUGO | S_IWUSR,
-		ad2s1210_show_fclkin, ad2s1210_store_fclkin, 0);
+		       ad2s1210_show_fclkin, ad2s1210_store_fclkin, 0);
 static IIO_DEVICE_ATTR(fexcit, S_IRUGO | S_IWUSR,
-		ad2s1210_show_fexcit,	ad2s1210_store_fexcit, 0);
+		       ad2s1210_show_fexcit,	ad2s1210_store_fexcit, 0);
 static IIO_DEVICE_ATTR(control, S_IRUGO | S_IWUSR,
-		ad2s1210_show_control, ad2s1210_store_control, 0);
+		       ad2s1210_show_control, ad2s1210_store_control, 0);
 static IIO_DEVICE_ATTR(bits, S_IRUGO | S_IWUSR,
-		ad2s1210_show_resolution, ad2s1210_store_resolution, 0);
+		       ad2s1210_show_resolution, ad2s1210_store_resolution, 0);
 static IIO_DEVICE_ATTR(fault, S_IRUGO | S_IWUSR,
-		ad2s1210_show_fault, ad2s1210_clear_fault, 0);
-static IIO_DEVICE_ATTR(pos, S_IRUGO,
-		ad2s1210_show_pos, NULL, 0);
-static IIO_DEVICE_ATTR(vel, S_IRUGO,
-		ad2s1210_show_vel, NULL, 0);
-static IIO_DEVICE_ATTR(pos_vel, S_IRUGO,
-		ad2s1210_show_pos_vel, NULL, 0);
+		       ad2s1210_show_fault, ad2s1210_clear_fault, 0);
+static IIO_DEVICE_ATTR(pos, S_IRUGO, ad2s1210_show_pos, NULL, 0);
+static IIO_DEVICE_ATTR(vel, S_IRUGO,  ad2s1210_show_vel, NULL, 0);
 static IIO_DEVICE_ATTR(los_thrd, S_IRUGO | S_IWUSR,
-		ad2s1210_show_reg, ad2s1210_store_reg, REG_LOS_THRD);
+		       ad2s1210_show_reg, ad2s1210_store_reg,
+		       AD2S1210_REG_LOS_THRD);
 static IIO_DEVICE_ATTR(dos_ovr_thrd, S_IRUGO | S_IWUSR,
-		ad2s1210_show_reg, ad2s1210_store_reg, REG_DOS_OVR_THRD);
+		       ad2s1210_show_reg, ad2s1210_store_reg,
+		       AD2S1210_REG_DOS_OVR_THRD);
 static IIO_DEVICE_ATTR(dos_mis_thrd, S_IRUGO | S_IWUSR,
-		ad2s1210_show_reg, ad2s1210_store_reg, REG_DOS_MIS_THRD);
+		       ad2s1210_show_reg, ad2s1210_store_reg,
+		       AD2S1210_REG_DOS_MIS_THRD);
 static IIO_DEVICE_ATTR(dos_rst_max_thrd, S_IRUGO | S_IWUSR,
-		ad2s1210_show_reg, ad2s1210_store_reg, REG_DOS_RST_MAX_THRD);
+		       ad2s1210_show_reg, ad2s1210_store_reg,
+		       AD2S1210_REG_DOS_RST_MAX_THRD);
 static IIO_DEVICE_ATTR(dos_rst_min_thrd, S_IRUGO | S_IWUSR,
-		ad2s1210_show_reg, ad2s1210_store_reg, REG_DOS_RST_MIN_THRD);
+		       ad2s1210_show_reg, ad2s1210_store_reg,
+		       AD2S1210_REG_DOS_RST_MIN_THRD);
 static IIO_DEVICE_ATTR(lot_high_thrd, S_IRUGO | S_IWUSR,
-		ad2s1210_show_reg, ad2s1210_store_reg, REG_LOT_HIGH_THRD);
+		       ad2s1210_show_reg, ad2s1210_store_reg,
+		       AD2S1210_REG_LOT_HIGH_THRD);
 static IIO_DEVICE_ATTR(lot_low_thrd, S_IRUGO | S_IWUSR,
-		ad2s1210_show_reg, ad2s1210_store_reg, REG_LOT_LOW_THRD);
+		       ad2s1210_show_reg, ad2s1210_store_reg,
+		       AD2S1210_REG_LOT_LOW_THRD);
 
 static struct attribute *ad2s1210_attributes[] = {
-	&iio_const_attr_description.dev_attr.attr,
 	&iio_dev_attr_raw_io.dev_attr.attr,
 	&iio_dev_attr_reset.dev_attr.attr,
 	&iio_dev_attr_fclkin.dev_attr.attr,
@@ -707,7 +628,6 @@ static struct attribute *ad2s1210_attributes[] = {
 	&iio_dev_attr_fault.dev_attr.attr,
 	&iio_dev_attr_pos.dev_attr.attr,
 	&iio_dev_attr_vel.dev_attr.attr,
-	&iio_dev_attr_pos_vel.dev_attr.attr,
 	&iio_dev_attr_los_thrd.dev_attr.attr,
 	&iio_dev_attr_dos_ovr_thrd.dev_attr.attr,
 	&iio_dev_attr_dos_mis_thrd.dev_attr.attr,
@@ -729,27 +649,32 @@ static int __devinit ad2s1210_initial(struct ad2s1210_state *st)
 	int ret;
 
 	mutex_lock(&st->lock);
-#if defined(CONFIG_AD2S1210_GPIO_INPUT)
-	st->resolution = read_resolution_pin(st);
-#elif defined(CONFIG_AD2S1210_GPIO_OUTPUT)
-	set_resolution_pin(st);
-#endif
-
-	config_write(st, REG_CONTROL);
-	data = DEF_CONTROL & ~(SET_RESOLUTION);
-	data |= (st->resolution - RES_10) >> 1;
-	config_write(st, data);
-	ret = config_read(st, REG_CONTROL, &data);
-	if (ret)
+	if (st->pdata->gpioin)
+		st->resolution = ad2s1210_read_resolution_pin(st);
+	else
+		ad2s1210_set_resolution_pin(st);
+
+	ret = ad2s1210_config_write(st, AD2S1210_REG_CONTROL);
+	if (ret < 0)
+		goto error_ret;
+	data = AD2S1210_DEF_CONTROL & ~(AD2S1210_SET_RESOLUTION);
+	data |= (st->resolution - 10) >> 1;
+	ret = ad2s1210_config_write(st, data);
+	if (ret < 0)
+		goto error_ret;
+	ret = ad2s1210_config_read(st, AD2S1210_REG_CONTROL);
+	if (ret < 0)
 		goto error_ret;
 
-	if (data & MSB_IS_HIGH) {
+	if (ret & AD2S1210_MSB_IS_HIGH) {
 		ret = -EIO;
 		goto error_ret;
 	}
 
-	update_frequency_control_word(st);
-	soft_reset(st);
+	ret = ad2s1210_update_frequency_control_word(st);
+	if (ret < 0)
+		goto error_ret;
+	ret = ad2s1210_soft_reset(st);
 error_ret:
 	mutex_unlock(&st->lock);
 	return ret;
@@ -760,90 +685,107 @@ static const struct iio_info ad2s1210_info = {
 	.driver_module = THIS_MODULE,
 };
 
+static int ad2s1210_setup_gpios(struct ad2s1210_state *st)
+{
+	int ret;
+	unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
+
+	ret = gpio_request_one(st->pdata->sample, GPIOF_DIR_IN, "sample");
+	if (ret < 0)
+		goto error_ret;
+	ret = gpio_request_one(st->pdata->a[0], flags, "a0");
+	if (ret < 0)
+		goto error_free_sample;
+	ret = gpio_request_one(st->pdata->a[1], flags, "a1");
+	if (ret < 0)
+		goto error_free_a0;
+	ret = gpio_request_one(st->pdata->res[1], flags, "res0");
+	if (ret < 0)
+		goto error_free_a1;
+	ret = gpio_request_one(st->pdata->res[1], flags, "res1");
+	if (ret < 0)
+		goto error_free_res0;
+
+	return 0;
+error_free_res0:
+	gpio_free(st->pdata->res[0]);
+error_free_a1:
+	gpio_free(st->pdata->a[1]);
+error_free_a0:
+	gpio_free(st->pdata->a[0]);
+error_free_sample:
+	gpio_free(st->pdata->sample);
+error_ret:
+	return ret;
+}
+
+static void ad2s1210_free_gpios(struct ad2s1210_state *st)
+{
+	gpio_free(st->pdata->res[1]);
+	gpio_free(st->pdata->res[0]);
+	gpio_free(st->pdata->a[1]);
+	gpio_free(st->pdata->a[0]);
+	gpio_free(st->pdata->sample);
+}
+
 static int __devinit ad2s1210_probe(struct spi_device *spi)
 {
+	struct iio_dev *indio_dev;
 	struct ad2s1210_state *st;
-	int pn, ret = 0;
-	unsigned short *pins = spi->dev.platform_data;
-
-	for (pn = 0; pn < AD2S1210_PN; pn++) {
-		if (gpio_request(pins[pn], DRV_NAME)) {
-			pr_err("%s: request gpio pin %d failed\n",
-						DRV_NAME, pins[pn]);
-			goto error_ret;
-		}
-		if (pn < AD2S1210_SAA)
-			gpio_direction_output(pins[pn], 1);
-		else {
-#if defined(CONFIG_AD2S1210_GPIO_INPUT)
-			gpio_direction_input(pins[pn]);
-#elif defined(CONFIG_AD2S1210_GPIO_OUTPUT)
-			gpio_direction_output(pins[pn], 1);
-#endif
-		}
-	}
+	int ret;
+
+	if (spi->dev.platform_data == NULL)
+		return -EINVAL;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
+	st = iio_priv(indio_dev);
+	st->pdata = spi->dev.platform_data;
+	ret = ad2s1210_setup_gpios(st);
+	if (ret < 0)
+		goto error_free_dev;
+
+	spi_set_drvdata(spi, indio_dev);
 
 	mutex_init(&st->lock);
 	st->sdev = spi;
-	st->xfer.tx_buf = st->tx;
-	st->xfer.rx_buf = st->rx;
-	st->hysteresis = 1;
+	st->hysteresis = true;
 	st->mode = MOD_CONFIG;
-	st->resolution = RES_12;
-	st->fclkin = AD2S1210_DEF_CLKIN;
+	st->resolution = 12;
 	st->fexcit = AD2S1210_DEF_EXCIT;
-	st->sample = pins[0];
-	st->a0 = pins[1];
-	st->a1 = pins[2];
-	st->res0 = pins[3];
-	st->res1 = pins[4];
-
-	st->idev = iio_allocate_device(0);
-	if (st->idev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->idev->dev.parent = &spi->dev;
 
-	st->idev->info = &ad2s1210_info;
-	st->idev->dev_data = (void *)(st);
-	st->idev->modes = INDIO_DIRECT_MODE;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &ad2s1210_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = iio_device_register(st->idev);
+	ret = iio_device_register(indio_dev);
 	if (ret)
-		goto error_free_dev;
+		goto error_free_gpios;
 
-	if (spi->max_speed_hz != AD2S1210_DEF_CLKIN)
-		st->fclkin = spi->max_speed_hz;
+	st->fclkin = spi->max_speed_hz;
 	spi->mode = SPI_MODE_3;
 	spi_setup(spi);
-
 	ad2s1210_initial(st);
+
 	return 0;
 
+error_free_gpios:
+	ad2s1210_free_gpios(st);
 error_free_dev:
-	iio_free_device(st->idev);
-error_free_st:
-	kfree(st);
+	iio_free_device(indio_dev);
 error_ret:
-	for (--pn; pn >= 0; pn--)
-		gpio_free(pins[pn]);
 	return ret;
 }
 
 static int __devexit ad2s1210_remove(struct spi_device *spi)
 {
-	struct ad2s1210_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->idev);
-	kfree(st);
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad2s1210_state *st = iio_priv(indio_dev);
+	iio_device_unregister(indio_dev);
+	ad2s1210_free_gpios(st);
 
 	return 0;
 }
diff --git a/drivers/staging/iio/resolver/ad2s1210.h b/drivers/staging/iio/resolver/ad2s1210.h
new file mode 100644
index 0000000..aec0bdca
--- /dev/null
+++ b/drivers/staging/iio/resolver/ad2s1210.h
@@ -0,0 +1,17 @@
+/*
+ * ad2s1210.h plaform data for the ADI Resolver to Digital Converters:
+ * AD2S1210
+ *
+ * Copyright (c) 2010-2010 Analog Devices Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+struct ad2s1210_platform_data {
+	unsigned sample;
+	unsigned a[2];
+	unsigned res[2];
+	bool gpioin;
+};
diff --git a/drivers/staging/iio/resolver/ad2s90.c b/drivers/staging/iio/resolver/ad2s90.c
index 9b72a95..166e241 100644
--- a/drivers/staging/iio/resolver/ad2s90.c
+++ b/drivers/staging/iio/resolver/ad2s90.c
@@ -24,29 +24,19 @@ struct ad2s90_state {
 	struct mutex lock;
 	struct iio_dev *idev;
 	struct spi_device *sdev;
-	u8 rx[2];
-	u8 tx[2];
+	u8 rx[2] ____cacheline_aligned;
 };
 
 static ssize_t ad2s90_show_angular(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
-	struct spi_message msg;
-	struct spi_transfer xfer;
 	int ret;
 	ssize_t len = 0;
 	u16 val;
-	struct iio_dev *idev = dev_get_drvdata(dev);
-	struct ad2s90_state *st = idev->dev_data;
+	struct ad2s90_state *st = iio_priv(dev_get_drvdata(dev));
 
-	xfer.len = 1;
-	xfer.tx_buf = st->tx;
-	xfer.rx_buf = st->rx;
 	mutex_lock(&st->lock);
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfer, &msg);
-	ret = spi_sync(st->sdev, &msg);
+	ret = spi_read(st->sdev, st->rx, 2);
 	if (ret)
 		goto error_ret;
 	val = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
@@ -60,12 +50,9 @@ error_ret:
 #define IIO_DEV_ATTR_SIMPLE_RESOLVER(_show) \
 	IIO_DEVICE_ATTR(angular, S_IRUGO, _show, NULL, 0)
 
-static IIO_CONST_ATTR(description,
-	"Low Cost, Complete 12-Bit Resolver-to-Digital Converter");
 static IIO_DEV_ATTR_SIMPLE_RESOLVER(ad2s90_show_angular);
 
 static struct attribute *ad2s90_attributes[] = {
-	&iio_const_attr_description.dev_attr.attr,
 	&iio_dev_attr_angular.dev_attr.attr,
 	NULL,
 };
@@ -82,29 +69,23 @@ static const struct iio_info ad2s90_info = {
 
 static int __devinit ad2s90_probe(struct spi_device *spi)
 {
+	struct iio_dev *indio_dev;
 	struct ad2s90_state *st;
 	int ret = 0;
 
-	st = kzalloc(sizeof(*st), GFP_KERNEL);
-	if (st == NULL) {
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-	spi_set_drvdata(spi, st);
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
 
 	mutex_init(&st->lock);
 	st->sdev = spi;
-
-	st->idev = iio_allocate_device(0);
-	if (st->idev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->idev->dev.parent = &spi->dev;
-
-	st->idev->info = &ad2s90_info;
-	st->idev->dev_data = (void *)(st);
-	st->idev->modes = INDIO_DIRECT_MODE;
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &ad2s90_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	ret = iio_device_register(st->idev);
 	if (ret)
@@ -119,18 +100,13 @@ static int __devinit ad2s90_probe(struct spi_device *spi)
 
 error_free_dev:
 	iio_free_device(st->idev);
-error_free_st:
-	kfree(st);
 error_ret:
 	return ret;
 }
 
 static int __devexit ad2s90_remove(struct spi_device *spi)
 {
-	struct ad2s90_state *st = spi_get_drvdata(spi);
-
-	iio_device_unregister(st->idev);
-	kfree(st);
+	iio_device_unregister(spi_get_drvdata(spi));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/trigger.h b/drivers/staging/iio/trigger.h
index f329fe1..e0b58ed 100644
--- a/drivers/staging/iio/trigger.h
+++ b/drivers/staging/iio/trigger.h
@@ -29,6 +29,8 @@ struct iio_subirq {
  * @set_trigger_state:	[DRIVER] switch on/off the trigger on demand
  * @try_reenable:	function to reenable the trigger when the
  *			use count is zero (may be NULL)
+ * @validate_device:	function to validate the device when the
+ *			current trigger gets changed.
  * @subirq_chip:	[INTERN] associate 'virtual' irq chip.
  * @subirq_base:	[INTERN] base number for irqs provided by trigger.
  * @subirqs:		[INTERN] information about the 'child' irqs.
@@ -48,6 +50,8 @@ struct iio_trigger {
 
 	int (*set_trigger_state)(struct iio_trigger *trig, bool state);
 	int (*try_reenable)(struct iio_trigger *trig);
+	int (*validate_device)(struct iio_trigger *trig,
+			       struct iio_dev *indio_dev);
 
 	struct irq_chip			subirq_chip;
 	int				subirq_base;
@@ -57,6 +61,30 @@ struct iio_trigger {
 	struct mutex			pool_lock;
 };
 
+/**
+ * struct iio_poll_func - poll function pair
+ *
+ * @private_data:		data specific to device (passed into poll func)
+ * @h:				the function that is actually run on trigger
+ * @thread:			threaded interrupt part
+ * @type:			the type of interrupt (basically if oneshot)
+ * @name:			name used to identify the trigger consumer.
+ * @irq:			the corresponding irq as allocated from the
+ *				trigger pool
+ * @timestamp:			some devices need a timestamp grabbed as soon
+ *				as possible after the trigger - hence handler
+ *				passes it via here.
+ **/
+struct iio_poll_func {
+	void				*private_data;
+	irqreturn_t (*h)(int irq, void *p);
+	irqreturn_t (*thread)(int irq, void *p);
+	int type;
+	char *name;
+	int irq;
+	s64 timestamp;
+};
+
 static inline struct iio_trigger *to_iio_trigger(struct device *d)
 {
 	return container_of(d, struct iio_trigger, dev);
@@ -136,30 +164,6 @@ static inline void iio_trigger_put_irq(struct iio_trigger *trig, int irq)
 	mutex_unlock(&trig->pool_lock);
 };
 
-/**
- * struct iio_poll_func - poll function pair
- *
- * @private_data:		data specific to device (passed into poll func)
- * @h:				the function that is actually run on trigger
- * @thread:			threaded interrupt part
- * @type:			the type of interrupt (basically if oneshot)
- * @name:			name used to identify the trigger consumer.
- * @irq:			the corresponding irq as allocated from the
- *				trigger pool
- * @timestamp:			some devices need a timestamp grabbed as soon
- *				as possible after the trigger - hence handler
- *				passes it via here.
- **/
-struct iio_poll_func {
-	void				*private_data;
-	irqreturn_t (*h)(int irq, void *p);
-	irqreturn_t (*thread)(int irq, void *p);
-	int type;
-	char *name;
-	int irq;
-	s64 timestamp;
-};
-
 struct iio_poll_func
 *iio_alloc_pollfunc(irqreturn_t (*h)(int irq, void *p),
 		    irqreturn_t (*thread)(int irq, void *p),
diff --git a/drivers/staging/iio/trigger/iio-trig-gpio.c b/drivers/staging/iio/trigger/iio-trig-gpio.c
index b188635..f1fb795 100644
--- a/drivers/staging/iio/trigger/iio-trig-gpio.c
+++ b/drivers/staging/iio/trigger/iio-trig-gpio.c
@@ -7,7 +7,7 @@
  * under the terms of the GNU General Public License version 2 as published by
  * the Free Software Foundation.
  *
- * Currently this is more of a functioning proof of concept that a fully
+ * Currently this is more of a functioning proof of concept than a full
  * fledged trigger driver.
  *
  * TODO: