Merge tag 'iio-for-3.8a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

First round of new IIO drivers and cleanups for the 3.8 cycle.

Here we have

* New driver ad5449 with the introduction of a new IIO return type
  to simplify power of 2 dividers (extremely common case).
* Some coccinelle warning fixing patches (dull but worthwhile as
  make for easier automated testing and cut down on false positives).
* Some trivial bits of formatting cleanup and spelling corrections.
* Use kcalloc in a few places for semantic reasons.
* Stop lis3l02dq driver (soon to be dropped I hope) using now non
  existent irq_to_gpio.
* Some dead code/unused variable removal
* Convert a few drivers to generic core provided functions instead
  of their own versions.

So all in all a nice new driver and a lot of worthy but dull cleanup.

38 files changed, 486 insertions, 96 deletions

diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index b2510c4..fe4bcd7 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -8,7 +8,7 @@ config HID_SENSOR_ACCEL_3D
 	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER
 	select HID_SENSOR_IIO_COMMON
-	tristate "HID Acelerometers 3D"
+	tristate "HID Accelerometers 3D"
 	help
 	  Say yes here to build support for the HID SENSOR
 	  accelerometers 3D.
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 3ed94bf..a917672 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -46,7 +46,6 @@ struct at91_adc_state {
 	struct clk		*clk;
 	bool			done;
 	int			irq;
-	bool			irq_enabled;
 	u16			last_value;
 	struct mutex		lock;
 	u8			num_channels;
@@ -82,10 +81,9 @@ static irqreturn_t at91_adc_trigger_handler(int irq, void *p)
 		*timestamp = pf->timestamp;
 	}
 
-	buffer->access->store_to(buffer, (u8 *)st->buffer);
+	iio_push_to_buffer(buffer, st->buffer);
 
 	iio_trigger_notify_done(idev->trig);
-	st->irq_enabled = true;
 
 	/* Needed to ACK the DRDY interruption */
 	at91_adc_readl(st, AT91_ADC_LCDR);
@@ -106,7 +104,6 @@ static irqreturn_t at91_adc_eoc_trigger(int irq, void *private)
 
 	if (iio_buffer_enabled(idev)) {
 		disable_irq_nosync(irq);
-		st->irq_enabled = false;
 		iio_trigger_poll(idev->trig, iio_get_time_ns());
 	} else {
 		st->last_value = at91_adc_readl(st, AT91_ADC_LCDR);
@@ -126,10 +123,8 @@ static int at91_adc_channel_init(struct iio_dev *idev)
 	idev->num_channels = bitmap_weight(&st->channels_mask,
 					   st->num_channels) + 1;
 
-	chan_array = devm_kzalloc(&idev->dev,
-				  ((idev->num_channels + 1) *
-					sizeof(struct iio_chan_spec)),
-				  GFP_KERNEL);
+	chan_array = devm_kcalloc(&idev->dev, idev->num_channels + 1,
+					sizeof(*chan_array), GFP_KERNEL);
 
 	if (!chan_array)
 		return -ENOMEM;
@@ -273,9 +268,8 @@ static int at91_adc_trigger_init(struct iio_dev *idev)
 	struct at91_adc_state *st = iio_priv(idev);
 	int i, ret;
 
-	st->trig = devm_kzalloc(&idev->dev,
-				st->trigger_number * sizeof(st->trig),
-				GFP_KERNEL);
+	st->trig = devm_kcalloc(&idev->dev, st->trigger_number,
+				sizeof(*st->trig), GFP_KERNEL);
 
 	if (st->trig == NULL) {
 		ret = -ENOMEM;
@@ -457,9 +451,8 @@ static int at91_adc_probe_dt(struct at91_adc_state *st,
 	st->registers->trigger_register = prop;
 
 	st->trigger_number = of_get_child_count(node);
-	st->trigger_list = devm_kzalloc(&idev->dev, st->trigger_number *
-					sizeof(struct at91_adc_trigger),
-					GFP_KERNEL);
+	st->trigger_list = devm_kcalloc(&idev->dev, st->trigger_number,
+					sizeof(*st->trigger_list), GFP_KERNEL);
 	if (!st->trigger_list) {
 		dev_err(&idev->dev, "Could not allocate trigger list memory.\n");
 		ret = -ENOMEM;
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index b1c0ee5..f68756e 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -67,6 +67,16 @@ config AD5446
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad5446.
 
+config AD5449
+	tristate "Analog Device AD5449 and similar DACs driver"
+	depends on SPI_MASTER
+	help
+	  Say yes here to build support for Analog Devices AD5415, AD5426, AD5429,
+	  AD5432, AD5439, AD5443, AD5449 Digital to Analog Converters.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad5449.
+
 config AD5504
 	tristate "Analog Devices AD5504/AD5501 DAC SPI driver"
 	depends on SPI
diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile
index c0d333b..5b528eb 100644
--- a/drivers/iio/dac/Makefile
+++ b/drivers/iio/dac/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o
 obj-$(CONFIG_AD5064) += ad5064.o
 obj-$(CONFIG_AD5504) += ad5504.o
 obj-$(CONFIG_AD5446) += ad5446.o
+obj-$(CONFIG_AD5449) += ad5449.o
 obj-$(CONFIG_AD5755) += ad5755.o
 obj-$(CONFIG_AD5764) += ad5764.o
 obj-$(CONFIG_AD5791) += ad5791.o
diff --git a/drivers/iio/dac/ad5449.c b/drivers/iio/dac/ad5449.c
new file mode 100644
index 0000000..5b43030
--- /dev/null
+++ b/drivers/iio/dac/ad5449.c
@@ -0,0 +1,375 @@
+/*
+ * AD5415, AD5426, AD5429, AD5432, AD5439, AD5443, AD5449 Digital to Analog
+ * Converter driver.
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *  Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/regulator/consumer.h>
+#include <asm/unaligned.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#include <linux/platform_data/ad5449.h>
+
+#define AD5449_MAX_CHANNELS		2
+#define AD5449_MAX_VREFS		2
+
+#define AD5449_CMD_NOOP			0x0
+#define AD5449_CMD_LOAD_AND_UPDATE(x)	(0x1 + (x) * 3)
+#define AD5449_CMD_READ(x)		(0x2 + (x) * 3)
+#define AD5449_CMD_LOAD(x)		(0x3 + (x) * 3)
+#define AD5449_CMD_CTRL			13
+
+#define AD5449_CTRL_SDO_OFFSET		10
+#define AD5449_CTRL_DAISY_CHAIN		BIT(9)
+#define AD5449_CTRL_HCLR_TO_MIDSCALE	BIT(8)
+#define AD5449_CTRL_SAMPLE_RISING	BIT(7)
+
+/**
+ * struct ad5449_chip_info - chip specific information
+ * @channels:		Channel specification
+ * @num_channels:	Number of channels
+ * @has_ctrl:		Chip has a control register
+ */
+struct ad5449_chip_info {
+	const struct iio_chan_spec *channels;
+	unsigned int num_channels;
+	bool has_ctrl;
+};
+
+/**
+ * struct ad5449 - driver instance specific data
+ * @spi:		the SPI device for this driver instance
+ * @chip_info:		chip model specific constants, available modes etc
+ * @vref_reg:		vref supply regulators
+ * @has_sdo:		whether the SDO line is connected
+ * @dac_cache:		Cache for the DAC values
+ * @data:		spi transfer buffers
+ */
+struct ad5449 {
+	struct spi_device		*spi;
+	const struct ad5449_chip_info	*chip_info;
+	struct regulator_bulk_data	vref_reg[AD5449_MAX_VREFS];
+
+	bool has_sdo;
+	uint16_t dac_cache[AD5449_MAX_CHANNELS];
+
+	/*
+	 * DMA (thus cache coherency maintenance) requires the
+	 * transfer buffers to live in their own cache lines.
+	 */
+	__be16 data[2] ____cacheline_aligned;
+};
+
+enum ad5449_type {
+	ID_AD5426,
+	ID_AD5429,
+	ID_AD5432,
+	ID_AD5439,
+	ID_AD5443,
+	ID_AD5449,
+};
+
+static int ad5449_write(struct iio_dev *indio_dev, unsigned int addr,
+	unsigned int val)
+{
+	struct ad5449 *st = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&indio_dev->mlock);
+	st->data[0] = cpu_to_be16((addr << 12) | val);
+	ret = spi_write(st->spi, st->data, 2);
+	mutex_unlock(&indio_dev->mlock);
+
+	return ret;
+}
+
+static int ad5449_read(struct iio_dev *indio_dev, unsigned int addr,
+	unsigned int *val)
+{
+	struct ad5449 *st = iio_priv(indio_dev);
+	int ret;
+	struct spi_message msg;
+	struct spi_transfer t[] = {
+		{
+			.tx_buf = &st->data[0],
+			.len = 2,
+			.cs_change = 1,
+		}, {
+			.tx_buf = &st->data[1],
+			.rx_buf = &st->data[1],
+			.len = 2,
+		},
+	};
+
+	spi_message_init(&msg);
+	spi_message_add_tail(&t[0], &msg);
+	spi_message_add_tail(&t[1], &msg);
+
+	mutex_lock(&indio_dev->mlock);
+	st->data[0] = cpu_to_be16(addr << 12);
+	st->data[1] = cpu_to_be16(AD5449_CMD_NOOP);
+
+	ret = spi_sync(st->spi, &msg);
+	if (ret < 0)
+		return ret;
+
+	*val = be16_to_cpu(st->data[1]);
+	mutex_unlock(&indio_dev->mlock);
+
+	return 0;
+}
+
+static int ad5449_read_raw(struct iio_dev *indio_dev,
+	struct iio_chan_spec const *chan, int *val, int *val2, long info)
+{
+	struct ad5449 *st = iio_priv(indio_dev);
+	struct regulator_bulk_data *reg;
+	int scale_uv;
+	int ret;
+
+	switch (info) {
+	case IIO_CHAN_INFO_RAW:
+		if (st->has_sdo) {
+			ret = ad5449_read(indio_dev,
+				AD5449_CMD_READ(chan->address), val);
+			if (ret)
+				return ret;
+			*val &= 0xfff;
+		} else {
+			*val = st->dac_cache[chan->address];
+		}
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		reg = &st->vref_reg[chan->channel];
+		scale_uv = regulator_get_voltage(reg->consumer);
+		if (scale_uv < 0)
+			return scale_uv;
+
+		*val = scale_uv / 1000;
+		*val2 = chan->scan_type.realbits;
+
+		return IIO_VAL_FRACTIONAL_LOG2;
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static int ad5449_write_raw(struct iio_dev *indio_dev,
+	struct iio_chan_spec const *chan, int val, int val2, long info)
+{
+	struct ad5449 *st = iio_priv(indio_dev);
+	int ret;
+
+	switch (info) {
+	case IIO_CHAN_INFO_RAW:
+		if (val < 0 || val >= (1 << chan->scan_type.realbits))
+			return -EINVAL;
+
+		ret = ad5449_write(indio_dev,
+			AD5449_CMD_LOAD_AND_UPDATE(chan->address),
+			val << chan->scan_type.shift);
+		if (ret == 0)
+			st->dac_cache[chan->address] = val;
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct iio_info ad5449_info = {
+	.read_raw = ad5449_read_raw,
+	.write_raw = ad5449_write_raw,
+	.driver_module = THIS_MODULE,
+};
+
+#define AD5449_CHANNEL(chan, bits) {				\
+	.type = IIO_VOLTAGE,					\
+	.indexed = 1,						\
+	.output = 1,						\
+	.channel = (chan),					\
+	.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |		\
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,		\
+	.address = (chan),					\
+	.scan_type = IIO_ST('u', (bits), 16, 12 - (bits)),	\
+}
+
+#define DECLARE_AD5449_CHANNELS(name, bits) \
+const struct iio_chan_spec name[] = { \
+	AD5449_CHANNEL(0, bits), \
+	AD5449_CHANNEL(1, bits), \
+}
+
+static DECLARE_AD5449_CHANNELS(ad5429_channels, 8);
+static DECLARE_AD5449_CHANNELS(ad5439_channels, 10);
+static DECLARE_AD5449_CHANNELS(ad5449_channels, 12);
+
+static const struct ad5449_chip_info ad5449_chip_info[] = {
+	[ID_AD5426] = {
+		.channels = ad5429_channels,
+		.num_channels = 1,
+		.has_ctrl = false,
+	},
+	[ID_AD5429] = {
+		.channels = ad5429_channels,
+		.num_channels = 2,
+		.has_ctrl = true,
+	},
+	[ID_AD5432] = {
+		.channels = ad5439_channels,
+		.num_channels = 1,
+		.has_ctrl = false,
+	},
+	[ID_AD5439] = {
+		.channels = ad5439_channels,
+		.num_channels = 2,
+		.has_ctrl = true,
+	},
+	[ID_AD5443] = {
+		.channels = ad5449_channels,
+		.num_channels = 1,
+		.has_ctrl = false,
+	},
+	[ID_AD5449] = {
+		.channels = ad5449_channels,
+		.num_channels = 2,
+		.has_ctrl = true,
+	},
+};
+
+static const char *ad5449_vref_name(struct ad5449 *st, int n)
+{
+	if (st->chip_info->num_channels == 1)
+		return "VREF";
+
+	if (n == 0)
+		return "VREFA";
+	else
+		return "VREFB";
+}
+
+static int __devinit ad5449_spi_probe(struct spi_device *spi)
+{
+	struct ad5449_platform_data *pdata = spi->dev.platform_data;
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct iio_dev *indio_dev;
+	struct ad5449 *st;
+	unsigned int i;
+	int ret;
+
+	indio_dev = iio_device_alloc(sizeof(*st));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
+
+	st->chip_info = &ad5449_chip_info[id->driver_data];
+	st->spi = spi;
+
+	for (i = 0; i < st->chip_info->num_channels; ++i)
+		st->vref_reg[i].supply = ad5449_vref_name(st, i);
+
+	ret = regulator_bulk_get(&spi->dev, st->chip_info->num_channels,
+				st->vref_reg);
+	if (ret)
+		goto error_free;
+
+	ret = regulator_bulk_enable(st->chip_info->num_channels, st->vref_reg);
+	if (ret)
+		goto error_free_reg;
+
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = id->name;
+	indio_dev->info = &ad5449_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = st->chip_info->channels;
+	indio_dev->num_channels = st->chip_info->num_channels;
+
+	if (st->chip_info->has_ctrl) {
+		unsigned int ctrl = 0x00;
+		if (pdata) {
+			if (pdata->hardware_clear_to_midscale)
+				ctrl |= AD5449_CTRL_HCLR_TO_MIDSCALE;
+			ctrl |= pdata->sdo_mode << AD5449_CTRL_SDO_OFFSET;
+			st->has_sdo = pdata->sdo_mode != AD5449_SDO_DISABLED;
+		} else {
+			st->has_sdo = true;
+		}
+		ad5449_write(indio_dev, AD5449_CMD_CTRL, ctrl);
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto error_disable_reg;
+
+	return 0;
+
+error_disable_reg:
+	regulator_bulk_disable(st->chip_info->num_channels, st->vref_reg);
+error_free_reg:
+	regulator_bulk_free(st->chip_info->num_channels, st->vref_reg);
+error_free:
+	iio_device_free(indio_dev);
+
+	return ret;
+}
+
+static int __devexit ad5449_spi_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad5449 *st = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	regulator_bulk_disable(st->chip_info->num_channels, st->vref_reg);
+	regulator_bulk_free(st->chip_info->num_channels, st->vref_reg);
+
+	iio_device_free(indio_dev);
+
+	return 0;
+}
+
+static const struct spi_device_id ad5449_spi_ids[] = {
+	{ "ad5415", ID_AD5449 },
+	{ "ad5426", ID_AD5426 },
+	{ "ad5429", ID_AD5429 },
+	{ "ad5432", ID_AD5432 },
+	{ "ad5439", ID_AD5439 },
+	{ "ad5443", ID_AD5443 },
+	{ "ad5449", ID_AD5449 },
+	{}
+};
+MODULE_DEVICE_TABLE(spi, ad5449_spi_ids);
+
+static struct spi_driver ad5449_spi_driver = {
+	.driver = {
+		.name = "ad5449",
+		.owner = THIS_MODULE,
+	},
+	.probe = ad5449_spi_probe,
+	.remove = __devexit_p(ad5449_spi_remove),
+	.id_table = ad5449_spi_ids,
+};
+module_spi_driver(ad5449_spi_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices AD5449 and similar DACs");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c
index 6948d75..bc92ff9 100644
--- a/drivers/iio/dac/ad5686.c
+++ b/drivers/iio/dac/ad5686.c
@@ -188,7 +188,7 @@ static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev,
 	if (ret)
 		return ret;
 
-	if (readin == true)
+	if (readin)
 		st->pwr_down_mask |= (0x3 << (chan->channel * 2));
 	else
 		st->pwr_down_mask &= ~(0x3 << (chan->channel * 2));
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index d4ad374..722a83f 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -371,12 +371,12 @@ ssize_t iio_buffer_write_length(struct device *dev,
 				const char *buf,
 				size_t len)
 {
-	int ret;
-	ulong val;
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct iio_buffer *buffer = indio_dev->buffer;
+	unsigned int val;
+	int ret;
 
-	ret = strict_strtoul(buf, 10, &val);
+	ret = kstrtouint(buf, 10, &val);
 	if (ret)
 		return ret;
 
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 6eb24db..37650a7 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -397,6 +397,11 @@ static ssize_t iio_read_channel_info(struct device *dev,
 		val2 = do_div(tmp, 1000000000LL);
 		val = tmp;
 		return sprintf(buf, "%d.%09u\n", val, val2);
+	case IIO_VAL_FRACTIONAL_LOG2:
+		tmp = (s64)val * 1000000000LL >> val2;
+		val2 = do_div(tmp, 1000000000LL);
+		val = tmp;
+		return sprintf(buf, "%d.%09u\n", val, val2);
 	default:
 		return 0;
 	}
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index fa6543b..857e630 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -239,13 +239,13 @@ static ssize_t iio_ev_value_store(struct device *dev,
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-	unsigned long val;
+	int val;
 	int ret;
 
 	if (!indio_dev->info->write_event_value)
 		return -EINVAL;
 
-	ret = strict_strtoul(buf, 10, &val);
+	ret = kstrtoint(buf, 10, &val);
 	if (ret)
 		return ret;
 
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index f2b78d4..b394621 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -78,7 +78,7 @@ int iio_map_array_unregister(struct iio_dev *indio_dev,
 				found_it = true;
 				break;
 			}
-		if (found_it == false) {
+		if (!found_it) {
 			ret = -ENODEV;
 			goto error_ret;
 		}
@@ -314,6 +314,9 @@ static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan,
 		*processed = div_s64(raw64 * (s64)scale_val * scale,
 				     scale_val2);
 		break;
+	case IIO_VAL_FRACTIONAL_LOG2:
+		*processed = (raw64 * (s64)scale_val * scale) >> scale_val2;
+		break;
 	default:
 		return -EINVAL;
 	}
diff --git a/drivers/staging/iio/accel/adis16201_core.c b/drivers/staging/iio/accel/adis16201_core.c
index 8e37d6e..5d2ae5d 100644
--- a/drivers/staging/iio/accel/adis16201_core.c
+++ b/drivers/staging/iio/accel/adis16201_core.c
@@ -345,7 +345,7 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
 			break;
 		default:
 			return -EINVAL;
-		};
+		}
 		mutex_lock(&indio_dev->mlock);
 		addr = adis16201_addresses[chan->address][1];
 		ret = adis16201_spi_read_reg_16(indio_dev, addr, &val16);
@@ -382,7 +382,7 @@ static int adis16201_write_raw(struct iio_dev *indio_dev,
 			break;
 		default:
 			return -EINVAL;
-		};
+		}
 		val16 = val & ((1 << bits) - 1);
 		addr = adis16201_addresses[chan->address][1];
 		return adis16201_spi_write_reg_16(indio_dev, addr, val16);
diff --git a/drivers/staging/iio/accel/adis16203_core.c b/drivers/staging/iio/accel/adis16203_core.c
index 002fa9d..2064710 100644
--- a/drivers/staging/iio/accel/adis16203_core.c
+++ b/drivers/staging/iio/accel/adis16203_core.c
@@ -21,8 +21,6 @@
 
 #include "adis16203.h"
 
-#define DRIVER_NAME		"adis16203"
-
 /**
  * adis16203_spi_write_reg_8() - write single byte to a register
  * @indio_dev: iio device associated with child of actual device
diff --git a/drivers/staging/iio/accel/adis16204_core.c b/drivers/staging/iio/accel/adis16204_core.c
index 05bdb7c..d0828d9 100644
--- a/drivers/staging/iio/accel/adis16204_core.c
+++ b/drivers/staging/iio/accel/adis16204_core.c
@@ -24,8 +24,6 @@
 
 #include "adis16204.h"
 
-#define DRIVER_NAME		"adis16204"
-
 /**
  * adis16204_spi_write_reg_8() - write single byte to a register
  * @dev: device associated with child of actual device (iio_dev or iio_trig)
@@ -389,7 +387,7 @@ static int adis16204_write_raw(struct iio_dev *indio_dev,
 			break;
 		default:
 			return -EINVAL;
-		};
+		}
 		val16 = val & ((1 << bits) - 1);
 		addr = adis16204_addresses[chan->address][1];
 		return adis16204_spi_write_reg_16(indio_dev, addr, val16);
diff --git a/drivers/staging/iio/accel/adis16209_core.c b/drivers/staging/iio/accel/adis16209_core.c
index b7333bf..420256e2 100644
--- a/drivers/staging/iio/accel/adis16209_core.c
+++ b/drivers/staging/iio/accel/adis16209_core.c
@@ -22,8 +22,6 @@
 
 #include "adis16209.h"
 
-#define DRIVER_NAME		"adis16209"
-
 /**
  * adis16209_spi_write_reg_8() - write single byte to a register
  * @indio_dev: iio device associated with actual device
@@ -295,7 +293,7 @@ static int adis16209_write_raw(struct iio_dev *indio_dev,
 			break;
 		default:
 			return -EINVAL;
-		};
+		}
 		val16 = val & ((1 << bits) - 1);
 		addr = adis16209_addresses[chan->address][1];
 		return adis16209_spi_write_reg_16(indio_dev, addr, val16);
@@ -373,7 +371,7 @@ static int adis16209_read_raw(struct iio_dev *indio_dev,
 			break;
 		default:
 			return -EINVAL;
-		};
+		}
 		mutex_lock(&indio_dev->mlock);
 		addr = adis16209_addresses[chan->address][1];
 		ret = adis16209_spi_read_reg_16(indio_dev, addr, &val16);
diff --git a/drivers/staging/iio/accel/adis16209_trigger.c b/drivers/staging/iio/accel/adis16209_trigger.c
index 2ad93dc..1122803 100644
--- a/drivers/staging/iio/accel/adis16209_trigger.c
+++ b/drivers/staging/iio/accel/adis16209_trigger.c
@@ -8,15 +8,6 @@
 #include "adis16209.h"
 
 /**
- * adis16209_data_rdy_trig_poll() the event handler for the data rdy trig
- **/
-static irqreturn_t adis16209_data_rdy_trig_poll(int irq, void *trig)
-{
-	iio_trigger_poll(trig, iio_get_time_ns());
-	return IRQ_HANDLED;
-}
-
-/**
  * adis16209_data_rdy_trigger_set_state() set datardy interrupt state
  **/
 static int adis16209_data_rdy_trigger_set_state(struct iio_trigger *trig,
@@ -45,7 +36,7 @@ int adis16209_probe_trigger(struct iio_dev *indio_dev)
 	}
 
 	ret = request_irq(st->us->irq,
-			  adis16209_data_rdy_trig_poll,
+			  iio_trigger_generic_data_rdy_poll,
 			  IRQF_TRIGGER_RISING,
 			  "adis16209",
 			  st->trig);
diff --git a/drivers/staging/iio/accel/adis16220_core.c b/drivers/staging/iio/accel/adis16220_core.c
index c755089..adf70b7 100644
--- a/drivers/staging/iio/accel/adis16220_core.c
+++ b/drivers/staging/iio/accel/adis16220_core.c
@@ -20,8 +20,6 @@
 
 #include "adis16220.h"
 
-#define DRIVER_NAME		"adis16220"
-
 /**
  * adis16220_spi_write_reg_8() - write single byte to a register
  * @indio_dev: iio device associated with child of actual device
diff --git a/drivers/staging/iio/accel/adis16240_core.c b/drivers/staging/iio/accel/adis16240_core.c
index 0fc26a49..9f48611 100644
--- a/drivers/staging/iio/accel/adis16240_core.c
+++ b/drivers/staging/iio/accel/adis16240_core.c
@@ -25,8 +25,6 @@
 
 #include "adis16240.h"
 
-#define DRIVER_NAME		"adis16240"
-
 static int adis16240_check_status(struct iio_dev *indio_dev);
 
 /**
diff --git a/drivers/staging/iio/accel/adis16240_trigger.c b/drivers/staging/iio/accel/adis16240_trigger.c
index fa90a22..f3caf09 100644
--- a/drivers/staging/iio/accel/adis16240_trigger.c
+++ b/drivers/staging/iio/accel/adis16240_trigger.c
@@ -8,15 +8,6 @@
 #include "adis16240.h"
 
 /**
- * adis16240_data_rdy_trig_poll() the event handler for the data rdy trig
- **/
-static irqreturn_t adis16240_data_rdy_trig_poll(int irq, void *trig)
-{
-	iio_trigger_poll(trig, iio_get_time_ns());
-	return IRQ_HANDLED;
-}
-
-/**
  * adis16240_data_rdy_trigger_set_state() set datardy interrupt state
  **/
 static int adis16240_data_rdy_trigger_set_state(struct iio_trigger *trig,
@@ -45,7 +36,7 @@ int adis16240_probe_trigger(struct iio_dev *indio_dev)
 	}
 
 	ret = request_irq(st->us->irq,
-			  adis16240_data_rdy_trig_poll,
+			  iio_trigger_generic_data_rdy_poll,
 			  IRQF_TRIGGER_RISING,
 			  "adis16240",
 			  st->trig);
diff --git a/drivers/staging/iio/accel/kxsd9.c b/drivers/staging/iio/accel/kxsd9.c
index fdd5fbd..e8e6e3f 100644
--- a/drivers/staging/iio/accel/kxsd9.c
+++ b/drivers/staging/iio/accel/kxsd9.c
@@ -171,7 +171,7 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev,
 		*val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK];
 		ret = IIO_VAL_INT_PLUS_MICRO;
 		break;
-	};
+	}
 
 error_ret:
 	return ret;
diff --git a/drivers/staging/iio/accel/lis3l02dq.h b/drivers/staging/iio/accel/lis3l02dq.h
index f9bcd41..2bac722 100644
--- a/drivers/staging/iio/accel/lis3l02dq.h
+++ b/drivers/staging/iio/accel/lis3l02dq.h
@@ -158,6 +158,7 @@ struct lis3l02dq_state {
 	struct spi_device		*us;
 	struct iio_trigger		*trig;
 	struct mutex			buf_lock;
+	int				gpio;
 	bool				trigger_on;
 
 	u8	tx[LIS3L02DQ_MAX_RX] ____cacheline_aligned;
diff --git a/drivers/staging/iio/accel/lis3l02dq_core.c b/drivers/staging/iio/accel/lis3l02dq_core.c
index 21b0469..d13c7e9 100644
--- a/drivers/staging/iio/accel/lis3l02dq_core.c
+++ b/drivers/staging/iio/accel/lis3l02dq_core.c
@@ -15,6 +15,7 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/gpio.h>
+#include <linux/of_gpio.h>
 #include <linux/mutex.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
@@ -690,6 +691,7 @@ static int __devinit lis3l02dq_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, indio_dev);
 
 	st->us = spi;
+	st->gpio = of_get_gpio(spi->dev.of_node, 0);
 	mutex_init(&st->buf_lock);
 	indio_dev->name = spi->dev.driver->name;
 	indio_dev->dev.parent = &spi->dev;
@@ -711,7 +713,7 @@ static int __devinit lis3l02dq_probe(struct spi_device *spi)
 		goto error_unreg_buffer_funcs;
 	}
 
-	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) {
+	if (spi->irq) {
 		ret = request_threaded_irq(st->us->irq,
 					   &lis3l02dq_th,
 					   &lis3l02dq_event_handler,
@@ -738,10 +740,10 @@ static int __devinit lis3l02dq_probe(struct spi_device *spi)
 	return 0;
 
 error_remove_trigger:
-	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)))
+	if (spi->irq)
 		lis3l02dq_remove_trigger(indio_dev);
 error_free_interrupt:
-	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
+	if (spi->irq)
 		free_irq(st->us->irq, indio_dev);
 error_uninitialize_buffer:
 	iio_buffer_unregister(indio_dev);
@@ -790,7 +792,7 @@ static int __devexit lis3l02dq_remove(struct spi_device *spi)
 	lis3l02dq_disable_all_events(indio_dev);
 	lis3l02dq_stop_device(indio_dev);
 
-	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
+	if (spi->irq)
 		free_irq(st->us->irq, indio_dev);
 
 	lis3l02dq_remove_trigger(indio_dev);
diff --git a/drivers/staging/iio/accel/lis3l02dq_ring.c b/drivers/staging/iio/accel/lis3l02dq_ring.c
index fa4190d..2463527 100644
--- a/drivers/staging/iio/accel/lis3l02dq_ring.c
+++ b/drivers/staging/iio/accel/lis3l02dq_ring.c
@@ -237,7 +237,7 @@ static int lis3l02dq_data_rdy_trigger_set_state(struct iio_trigger *trig,
 	u8 t;
 
 	__lis3l02dq_write_data_ready_config(indio_dev, state);
-	if (state == false) {
+	if (!state) {
 		/*
 		 * A possible quirk with the handler is currently worked around
 		 * by ensuring outstanding read events are cleared.
@@ -263,7 +263,7 @@ static int lis3l02dq_trig_try_reen(struct iio_trigger *trig)
 	/* If gpio still high (or high again)
 	 * In theory possible we will need to do this several times */
 	for (i = 0; i < 5; i++)
-		if (gpio_get_value(irq_to_gpio(st->us->irq)))
+		if (gpio_get_value(st->gpio))
 			lis3l02dq_read_all(indio_dev, NULL);
 		else
 			break;
diff --git a/drivers/staging/iio/adc/lpc32xx_adc.c b/drivers/staging/iio/adc/lpc32xx_adc.c
index 7e9bd00..10c5962 100644
--- a/drivers/staging/iio/adc/lpc32xx_adc.c
+++ b/drivers/staging/iio/adc/lpc32xx_adc.c
@@ -150,7 +150,7 @@ static int __devinit lpc32xx_adc_probe(struct platform_device *pdev)
 
 	info = iio_priv(iodev);
 
-	info->adc_base = ioremap(res->start, res->end - res->start + 1);
+	info->adc_base = ioremap(res->start, resource_size(res));
 	if (!info->adc_base) {
 		dev_err(&pdev->dev, "failed mapping memory\n");
 		retval = -EBUSY;
diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
index ca7c1fa..df5bba2 100644
--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -351,7 +351,7 @@ static int mxs_lradc_buffer_preenable(struct iio_dev *iio)
 		writel(chan_value, lradc->base + LRADC_CH(ofs));
 		enable |= 1 << ofs;
 		ofs++;
-	};
+	}
 
 	writel(LRADC_DELAY_TRIGGER_LRADCS_MASK | LRADC_DELAY_KICK,
 		lradc->base + LRADC_DELAY(0) + STMP_OFFSET_REG_CLR);
diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/staging/iio/cdc/ad7150.c
index 6a40414..c72a6c0 100644
--- a/drivers/staging/iio/cdc/ad7150.c
+++ b/drivers/staging/iio/cdc/ad7150.c
@@ -156,7 +156,7 @@ static int ad7150_read_event_config(struct iio_dev *indio_dev, u64 event_code)
 			return !adaptive && (threshtype == 0x1);
 		else
 			return !adaptive && (threshtype == 0x0);
-	};
+	}
 	return -EINVAL;
 }
 
@@ -194,7 +194,7 @@ static int ad7150_write_event_params(struct iio_dev *indio_dev, u64 event_code)
 		break;
 	default:
 		return -EINVAL;
-	};
+	}
 	ret = i2c_smbus_write_byte_data(chip->client,
 					ad7150_addresses[chan][4],
 					sens);
@@ -257,7 +257,7 @@ static int ad7150_write_event_config(struct iio_dev *indio_dev,
 	default:
 		ret = -EINVAL;
 		goto error_ret;
-	};
+	}
 
 	cfg |= (!adaptive << 7) | (thresh_type << 5);
 
@@ -327,7 +327,7 @@ static int ad7150_write_event_value(struct iio_dev *indio_dev,
 	default:
 		ret = -EINVAL;
 		goto error_ret;
-	};
+	}
 
 	/* write back if active */
 	ret = ad7150_write_event_params(indio_dev, event_code);
@@ -360,7 +360,7 @@ static ssize_t ad7150_show_timeout(struct device *dev,
 		break;
 	default:
 		return -EINVAL;
-	};
+	}
 
 	return sprintf(buf, "%d\n", value);
 }
@@ -394,7 +394,7 @@ static ssize_t ad7150_store_timeout(struct device *dev,
 	default:
 		ret = -EINVAL;
 		goto error_ret;
-	};
+	}
 
 	ret = ad7150_write_event_params(indio_dev, this_attr->address);
 error_ret:
diff --git a/drivers/staging/iio/cdc/ad7152.c b/drivers/staging/iio/cdc/ad7152.c
index 98c3015..288b33e 100644
--- a/drivers/staging/iio/cdc/ad7152.c
+++ b/drivers/staging/iio/cdc/ad7152.c
@@ -405,7 +405,7 @@ static int ad7152_read_raw(struct iio_dev *indio_dev,
 		break;
 	default:
 		ret = -EINVAL;
-	};
+	}
 out:
 	mutex_unlock(&indio_dev->mlock);
 	return ret;
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
index 754e11e..e6c11d9 100644
--- a/drivers/staging/iio/cdc/ad7746.c
+++ b/drivers/staging/iio/cdc/ad7746.c
@@ -677,7 +677,7 @@ static int ad7746_read_raw(struct iio_dev *indio_dev,
 		break;
 	default:
 		ret = -EINVAL;
-	};
+	}
 out:
 	mutex_unlock(&indio_dev->mlock);
 	return ret;
diff --git a/drivers/staging/iio/gyro/adis16260_core.c b/drivers/staging/iio/gyro/adis16260_core.c
index 9571c03..2753333 100644
--- a/drivers/staging/iio/gyro/adis16260_core.c
+++ b/drivers/staging/iio/gyro/adis16260_core.c
@@ -24,8 +24,6 @@
 
 #include "adis16260.h"
 
-#define DRIVER_NAME		"adis16260"
-
 static int adis16260_check_status(struct iio_dev *indio_dev);
 
 /**
@@ -528,7 +526,7 @@ static int adis16260_read_raw(struct iio_dev *indio_dev,
 			break;
 		default:
 			return -EINVAL;
-		};
+		}
 		mutex_lock(&indio_dev->mlock);
 		addr = adis16260_addresses[chan->address][1];
 		ret = adis16260_spi_read_reg_16(indio_dev, addr, &val16);
@@ -548,7 +546,7 @@ static int adis16260_read_raw(struct iio_dev *indio_dev,
 			break;
 		default:
 			return -EINVAL;
-		};
+		}
 		mutex_lock(&indio_dev->mlock);
 		addr = adis16260_addresses[chan->address][2];
 		ret = adis16260_spi_read_reg_16(indio_dev, addr, &val16);
diff --git a/drivers/staging/iio/iio_dummy_evgen.c b/drivers/staging/iio/iio_dummy_evgen.c
index 74e24e8..132d278 100644
--- a/drivers/staging/iio/iio_dummy_evgen.c
+++ b/drivers/staging/iio/iio_dummy_evgen.c
@@ -108,7 +108,7 @@ int iio_dummy_evgen_get_irq(void)
 
 	mutex_lock(&iio_evgen->lock);
 	for (i = 0; i < IIO_EVENTGEN_NO; i++)
-		if (iio_evgen->inuse[i] == false) {
+		if (!iio_evgen->inuse[i]) {
 			ret = iio_evgen->base + i;
 			iio_evgen->inuse[i] = true;
 			break;
diff --git a/drivers/staging/iio/imu/adis16400_core.c b/drivers/staging/iio/imu/adis16400_core.c
index b302c9b..5eab327 100644
--- a/drivers/staging/iio/imu/adis16400_core.c
+++ b/drivers/staging/iio/imu/adis16400_core.c
@@ -622,7 +622,7 @@ static const struct iio_chan_spec adis16400_channels[] = {
 		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in_supply,
 		.scan_index = ADIS16400_SCAN_SUPPLY,
-		.scan_type = IIO_ST('u', 14, 16, 0)
+		.scan_type = IIO_ST('u', 14, 16, 0),
 	}, {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
@@ -633,7 +633,7 @@ static const struct iio_chan_spec adis16400_channels[] = {
 		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_x,
 		.scan_index = ADIS16400_SCAN_GYRO_X,
-		.scan_type = IIO_ST('s', 14, 16, 0)
+		.scan_type = IIO_ST('s', 14, 16, 0),
 	}, {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
@@ -752,7 +752,7 @@ static const struct iio_chan_spec adis16350_channels[] = {
 		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in_supply,
 		.scan_index = ADIS16400_SCAN_SUPPLY,
-		.scan_type = IIO_ST('u', 12, 16, 0)
+		.scan_type = IIO_ST('u', 12, 16, 0),
 	}, {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
@@ -763,7 +763,7 @@ static const struct iio_chan_spec adis16350_channels[] = {
 		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_x,
 		.scan_index = ADIS16400_SCAN_GYRO_X,
-		.scan_type = IIO_ST('s', 14, 16, 0)
+		.scan_type = IIO_ST('s', 14, 16, 0),
 	}, {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
@@ -877,7 +877,7 @@ static const struct iio_chan_spec adis16300_channels[] = {
 		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in_supply,
 		.scan_index = ADIS16400_SCAN_SUPPLY,
-		.scan_type = IIO_ST('u', 12, 16, 0)
+		.scan_type = IIO_ST('u', 12, 16, 0),
 	}, {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c
index 10e0954..f7edf69 100644
--- a/drivers/staging/iio/magnetometer/hmc5843.c
+++ b/drivers/staging/iio/magnetometer/hmc5843.c
@@ -555,7 +555,7 @@ static int hmc5843_read_raw(struct iio_dev *indio_dev,
 		*val = 0;
 		*val2 = data->variant->regval_to_nanoscale[data->range];
 		return IIO_VAL_INT_PLUS_NANO;
-	};
+	}
 	return -EINVAL;
 }
 
diff --git a/drivers/staging/iio/meter/ade7753.h b/drivers/staging/iio/meter/ade7753.h
index 3f059d3..a9d93cc 100644
--- a/drivers/staging/iio/meter/ade7753.h
+++ b/drivers/staging/iio/meter/ade7753.h
@@ -55,8 +55,6 @@
 #define ADE7753_SPI_BURST	(u32)(1000 * 1000)
 #define ADE7753_SPI_FAST	(u32)(2000 * 1000)
 
-#define DRIVER_NAME		"ade7753"
-
 /**
  * struct ade7753_state - device instance specific data
  * @us:			actual spi_device
diff --git a/drivers/staging/iio/meter/ade7754.h b/drivers/staging/iio/meter/ade7754.h
index 6121125..e42ffc3 100644
--- a/drivers/staging/iio/meter/ade7754.h
+++ b/drivers/staging/iio/meter/ade7754.h
@@ -73,8 +73,6 @@
 #define ADE7754_SPI_BURST	(u32)(1000 * 1000)
 #define ADE7754_SPI_FAST	(u32)(2000 * 1000)
 
-#define DRIVER_NAME		"ade7754"
-
 /**
  * struct ade7754_state - device instance specific data
  * @us:			actual spi_device
diff --git a/drivers/staging/iio/meter/ade7758.h b/drivers/staging/iio/meter/ade7758.h
index 1e11ad5..0731820 100644
--- a/drivers/staging/iio/meter/ade7758.h
+++ b/drivers/staging/iio/meter/ade7758.h
@@ -105,9 +105,6 @@
 #define AD7758_APP_PWR		4
 #define AD7758_WT(p, w)		(((w) << 2) | (p))
 
-#define DRIVER_NAME		"ade7758"
-
-
 /**
  * struct ade7758_state - device instance specific data
  * @us:			actual spi_device
diff --git a/drivers/staging/iio/meter/ade7759.h b/drivers/staging/iio/meter/ade7759.h
index c81d23d..f9ff1f8 100644
--- a/drivers/staging/iio/meter/ade7759.h
+++ b/drivers/staging/iio/meter/ade7759.h
@@ -36,8 +36,6 @@
 #define ADE7759_SPI_BURST	(u32)(1000 * 1000)
 #define ADE7759_SPI_FAST	(u32)(2000 * 1000)
 
-#define DRIVER_NAME		"ade7759"
-
 /**
  * struct ade7759_state - device instance specific data
  * @us:			actual spi_device
diff --git a/drivers/staging/iio/meter/ade7854.h b/drivers/staging/iio/meter/ade7854.h
index 2c96e86..0653457 100644
--- a/drivers/staging/iio/meter/ade7854.h
+++ b/drivers/staging/iio/meter/ade7854.h
@@ -142,8 +142,6 @@
 #define ADE7854_SPI_BURST	(u32)(1000 * 1000)
 #define ADE7854_SPI_FAST	(u32)(2000 * 1000)
 
-#define DRIVER_NAME		"ade7854"
-
 /**
  * struct ade7854_state - device instance specific data
  * @spi:			actual spi_device
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 5c647ec..87b196a 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -58,5 +58,6 @@ enum iio_modifier {
 #define IIO_VAL_INT_PLUS_NANO 3
 #define IIO_VAL_INT_PLUS_MICRO_DB 4
 #define IIO_VAL_FRACTIONAL 10
+#define IIO_VAL_FRACTIONAL_LOG2 11
 
 #endif /* _IIO_TYPES_H_ */
diff --git a/include/linux/platform_data/ad5449.h b/include/linux/platform_data/ad5449.h
new file mode 100644
index 0000000..bd712bd
--- /dev/null
+++ b/include/linux/platform_data/ad5449.h
@@ -0,0 +1,40 @@
+/*
+ * AD5415, AD5426, AD5429, AD5432, AD5439, AD5443, AD5449 Digital to Analog
+ * Converter driver.
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *  Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef __LINUX_PLATFORM_DATA_AD5449_H__
+#define __LINUX_PLATFORM_DATA_AD5449_H__
+
+/**
+ * enum ad5449_sdo_mode - AD5449 SDO pin configuration
+ * @AD5449_SDO_DRIVE_FULL: Drive the SDO pin with full strength.
+ * @AD5449_SDO_DRIVE_WEAK: Drive the SDO pin with not full strength.
+ * @AD5449_SDO_OPEN_DRAIN: Operate the SDO pin in open-drain mode.
+ * @AD5449_SDO_DISABLED: Disable the SDO pin, in this mode it is not possible to
+ *			read back from the device.
+ */
+enum ad5449_sdo_mode {
+	AD5449_SDO_DRIVE_FULL = 0x0,
+	AD5449_SDO_DRIVE_WEAK = 0x1,
+	AD5449_SDO_OPEN_DRAIN = 0x2,
+	AD5449_SDO_DISABLED = 0x3,
+};
+
+/**
+ * struct ad5449_platform_data - Platform data for the ad5449 DAC driver
+ * @sdo_mode: SDO pin mode
+ * @hardware_clear_to_midscale: Whether asserting the hardware CLR pin sets the
+ *			outputs to midscale (true) or to zero scale(false).
+ */
+struct ad5449_platform_data {
+	enum ad5449_sdo_mode sdo_mode;
+	bool hardware_clear_to_midscale;
+};
+
+#endif