Merge tag 'iio-for-4.6c' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Third set of IIO new device support, features and cleanups for the 4.6 cycle.

Good to see several new contributors in this set - and more generally a
number of new 'faces' over this whole cycle.

Staging movements
* hmc5843
  - out of staging.
* periodic RTC trigger
  - driver dropped.  This is an ancient driver (brings back some memories ;)
  that was always somewhat of a bodge. Originally there was a driver that
  never went into mainline that supported large numbers of periodict timers
  on the PXA270 via this route. Discussions to have a generic periodic
  timer subsystem never went anywhere.  At the time RTC periodic
  interrupts were real - now they are emulated using high resolution
  timers so with the HRT driver this has become pointless.

New device support
* mpu6050 driver
  - Add support for the mpu6500.
* TI tpl0102 potentiometer
  - new driver.
* Vybrid SoC DAC
  - new driver.  The ADC on this SoC has been supported for a while, this
    adds a separate driver for the DAC.

New Features
* hmc5844
  - Attributes to configure the bias current (typically part of a self test)
    This could be done before via a somewhat obscure custom interface.
    This at least makes it easy to tell what is going on.
  - Document all custom attributes.
* mpu6050
  - Add support for calibration offset control and readback.
* ms5611
  - power regulator support.  This is always one that gets added the
    first time someone has a board that needs it.  Here it was needed,
    hence it was added.

Cleanups / minor fixes
* tree wide
  - clean up all the myriad different return values in response to a
    failure of i2c_check_functionality.  After discussions everyone seemed
    happy wiht -EOPNOTSUPP which seems to describe the situation well.
    I encouraged a tree wide cleanup to set a good example in future for
    this.
* core
  - Typos in the iio_event_spec documentation in iio.h
* afe4403
  - select REGMAP_SPI to avoid dependency issues
  - mark suspend/resume as __maybe_unused to avoid warnings
* afe4404
  - mark suspend/resume as __maybe_unused to avoid warnings
* atlas-ph-sensor
  - switch the regmap cache type from linear to rbtree to gain reading of
    registers on initial startup.  It's not immediately obvious, but
    regmap flat is meant for high performances cases so doesn't read these
    registers.
  - use regmap_bulk_read in one case where it was using
    i2c_smbus_read_i2c_block_data directly (unlike everything else that was
    through regmap).
* ina2xx
  - stype cleanups (lots of them!)
* isl29018
  - Get the struct device back from regmap rather than storing another
    copy of it in the private data.  This cleanup makes sense in a number
    of other drivers so patches may well follow.
* mpu6050
  - style cleanups (lots of them!)
  - improved return value handling
  - use usleep_range to avoid the usual issues with very short msleeps.
  - add some missing documentation.
* ms5611
  - use the probed device name for the device rather than the driver name.
  - select IIO_BUFFER to avoid dependency issues
* palmas
  - drop IRQF_EARLY_RESUME as no longer needed after genirq changes.

13 files changed, 15 insertions, 1211 deletions

diff --git a/drivers/staging/iio/Kconfig b/drivers/staging/iio/Kconfig
index 0e044cb..8abc1ab 100644
--- a/drivers/staging/iio/Kconfig
+++ b/drivers/staging/iio/Kconfig
@@ -12,7 +12,6 @@ source "drivers/staging/iio/frequency/Kconfig"
 source "drivers/staging/iio/gyro/Kconfig"
 source "drivers/staging/iio/impedance-analyzer/Kconfig"
 source "drivers/staging/iio/light/Kconfig"
-source "drivers/staging/iio/magnetometer/Kconfig"
 source "drivers/staging/iio/meter/Kconfig"
 source "drivers/staging/iio/resolver/Kconfig"
 source "drivers/staging/iio/trigger/Kconfig"
diff --git a/drivers/staging/iio/Makefile b/drivers/staging/iio/Makefile
index 3e616b4..0cfd05d 100644
--- a/drivers/staging/iio/Makefile
+++ b/drivers/staging/iio/Makefile
@@ -10,7 +10,6 @@ obj-y += frequency/
 obj-y += gyro/
 obj-y += impedance-analyzer/
 obj-y += light/
-obj-y += magnetometer/
 obj-y += meter/
 obj-y += resolver/
 obj-y += trigger/
diff --git a/drivers/staging/iio/TODO b/drivers/staging/iio/TODO
index c22a0ed..93a8968 100644
--- a/drivers/staging/iio/TODO
+++ b/drivers/staging/iio/TODO
@@ -58,14 +58,6 @@ different requirements.  This one suits mid range
 frequencies (100Hz - 4kHz).
 2) Lots of testing
 
-Periodic Timer trigger
-1) Move to a more general hardware periodic timer request
-subsystem. Current approach is abusing purpose of RTC.
-Initial discussions have taken place, but no actual code
-is in place as yet. This topic will be reopened on lkml
-shortly. I don't really envision this patch being merged
-in anything like its current form.
-
 GPIO trigger
 1) Add control over the type of interrupt etc.  This will
 necessitate a header that is also visible from arch board
diff --git a/drivers/staging/iio/light/isl29018.c b/drivers/staging/iio/light/isl29018.c
index 03dbfb6..76d9f74 100644
--- a/drivers/staging/iio/light/isl29018.c
+++ b/drivers/staging/iio/light/isl29018.c
@@ -100,7 +100,6 @@ static const struct isl29018_scale {
 };
 
 struct isl29018_chip {
-	struct device		*dev;
 	struct regmap		*regmap;
 	struct mutex		lock;
 	int			type;
@@ -180,30 +179,31 @@ static int isl29018_read_sensor_input(struct isl29018_chip *chip, int mode)
 	int status;
 	unsigned int lsb;
 	unsigned int msb;
+	struct device *dev = regmap_get_device(chip->regmap);
 
 	/* Set mode */
 	status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1,
 			      mode << COMMMAND1_OPMODE_SHIFT);
 	if (status) {
-		dev_err(chip->dev,
+		dev_err(dev,
 			"Error in setting operating mode err %d\n", status);
 		return status;
 	}
 	msleep(CONVERSION_TIME_MS);
 	status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_LSB, &lsb);
 	if (status < 0) {
-		dev_err(chip->dev,
+		dev_err(dev,
 			"Error in reading LSB DATA with err %d\n", status);
 		return status;
 	}
 
 	status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_MSB, &msb);
 	if (status < 0) {
-		dev_err(chip->dev,
+		dev_err(dev,
 			"Error in reading MSB DATA with error %d\n", status);
 		return status;
 	}
-	dev_vdbg(chip->dev, "MSB 0x%x and LSB 0x%x\n", msb, lsb);
+	dev_vdbg(dev, "MSB 0x%x and LSB 0x%x\n", msb, lsb);
 
 	return (msb << 8) | lsb;
 }
@@ -246,13 +246,14 @@ static int isl29018_read_proximity_ir(struct isl29018_chip *chip, int scheme,
 	int status;
 	int prox_data = -1;
 	int ir_data = -1;
+	struct device *dev = regmap_get_device(chip->regmap);
 
 	/* Do proximity sensing with required scheme */
 	status = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMANDII,
 				    COMMANDII_SCHEME_MASK,
 				    scheme << COMMANDII_SCHEME_SHIFT);
 	if (status) {
-		dev_err(chip->dev, "Error in setting operating mode\n");
+		dev_err(dev, "Error in setting operating mode\n");
 		return status;
 	}
 
@@ -525,10 +526,11 @@ static int isl29035_detect(struct isl29018_chip *chip)
 {
 	int status;
 	unsigned int id;
+	struct device *dev = regmap_get_device(chip->regmap);
 
 	status = regmap_read(chip->regmap, ISL29035_REG_DEVICE_ID, &id);
 	if (status < 0) {
-		dev_err(chip->dev,
+		dev_err(dev,
 			"Error reading ID register with error %d\n",
 			status);
 		return status;
@@ -553,6 +555,7 @@ enum {
 static int isl29018_chip_init(struct isl29018_chip *chip)
 {
 	int status;
+	struct device *dev = regmap_get_device(chip->regmap);
 
 	if (chip->type == isl29035) {
 		status = isl29035_detect(chip);
@@ -582,7 +585,7 @@ static int isl29018_chip_init(struct isl29018_chip *chip)
 	 */
 	status = regmap_write(chip->regmap, ISL29018_REG_TEST, 0x0);
 	if (status < 0) {
-		dev_err(chip->dev, "Failed to clear isl29018 TEST reg.(%d)\n",
+		dev_err(dev, "Failed to clear isl29018 TEST reg.(%d)\n",
 			status);
 		return status;
 	}
@@ -593,7 +596,7 @@ static int isl29018_chip_init(struct isl29018_chip *chip)
 	 */
 	status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1, 0);
 	if (status < 0) {
-		dev_err(chip->dev, "Failed to clear isl29018 CMD1 reg.(%d)\n",
+		dev_err(dev, "Failed to clear isl29018 CMD1 reg.(%d)\n",
 			status);
 		return status;
 	}
@@ -604,14 +607,14 @@ static int isl29018_chip_init(struct isl29018_chip *chip)
 	status = isl29018_set_scale(chip, chip->scale.scale,
 				    chip->scale.uscale);
 	if (status < 0) {
-		dev_err(chip->dev, "Init of isl29018 fails\n");
+		dev_err(dev, "Init of isl29018 fails\n");
 		return status;
 	}
 
 	status = isl29018_set_integration_time(chip,
 			isl29018_int_utimes[chip->type][chip->int_time]);
 	if (status < 0) {
-		dev_err(chip->dev, "Init of isl29018 fails\n");
+		dev_err(dev, "Init of isl29018 fails\n");
 		return status;
 	}
 
@@ -728,7 +731,6 @@ static int isl29018_probe(struct i2c_client *client,
 	chip = iio_priv(indio_dev);
 
 	i2c_set_clientdata(client, indio_dev);
-	chip->dev = &client->dev;
 
 	if (id) {
 		name = id->name;
@@ -751,7 +753,7 @@ static int isl29018_probe(struct i2c_client *client,
 				chip_info_tbl[dev_id].regmap_cfg);
 	if (IS_ERR(chip->regmap)) {
 		err = PTR_ERR(chip->regmap);
-		dev_err(chip->dev, "regmap initialization failed: %d\n", err);
+		dev_err(&client->dev, "regmap initialization fails: %d\n", err);
 		return err;
 	}
 
diff --git a/drivers/staging/iio/magnetometer/Kconfig b/drivers/staging/iio/magnetometer/Kconfig
deleted file mode 100644
index dec814a..0000000
--- a/drivers/staging/iio/magnetometer/Kconfig
+++ /dev/null
@@ -1,40 +0,0 @@
-#
-# Magnetometer sensors
-#
-menu "Magnetometer sensors"
-
-config SENSORS_HMC5843
-	tristate
-	select IIO_BUFFER
-	select IIO_TRIGGERED_BUFFER
-
-config SENSORS_HMC5843_I2C
-	tristate "Honeywell HMC5843/5883/5883L 3-Axis Magnetometer (I2C)"
-	depends on I2C
-	select SENSORS_HMC5843
-	select REGMAP_I2C
-	help
-	  Say Y here to add support for the Honeywell HMC5843, HMC5883 and
-	  HMC5883L 3-Axis Magnetometer (digital compass).
-
-	  This driver can also be compiled as a set of modules.
-	  If so, these modules will be created:
-	  - hmc5843_core (core functions)
-	  - hmc5843_i2c (support for HMC5843, HMC5883, HMC5883L and HMC5983)
-
-config SENSORS_HMC5843_SPI
-	tristate "Honeywell HMC5983 3-Axis Magnetometer (SPI)"
-	depends on SPI_MASTER
-	select SENSORS_HMC5843
-	select REGMAP_SPI
-	help
-	  Say Y here to add support for the Honeywell HMC5983 3-Axis Magnetometer
-	  (digital compass).
-
-	  This driver can also be compiled as a set of modules.
-	  If so, these modules will be created:
-	  - hmc5843_core (core functions)
-	  - hmc5843_spi (support for HMC5983)
-
-
-endmenu
diff --git a/drivers/staging/iio/magnetometer/Makefile b/drivers/staging/iio/magnetometer/Makefile
deleted file mode 100644
index 33761a1..0000000
--- a/drivers/staging/iio/magnetometer/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# Makefile for industrial I/O Magnetometer sensors
-#
-
-obj-$(CONFIG_SENSORS_HMC5843)		+= hmc5843_core.o
-obj-$(CONFIG_SENSORS_HMC5843_I2C)	+= hmc5843_i2c.o
-obj-$(CONFIG_SENSORS_HMC5843_SPI)	+= hmc5843_spi.o
diff --git a/drivers/staging/iio/magnetometer/hmc5843.h b/drivers/staging/iio/magnetometer/hmc5843.h
deleted file mode 100644
index 76a5d74..0000000
--- a/drivers/staging/iio/magnetometer/hmc5843.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Header file for hmc5843 driver
- *
- * Split from hmc5843.c
- * Copyright (C) Josef Gajdusek <atx@atx.name>
- *
- * 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.
- */
-
-#ifndef HMC5843_CORE_H
-#define HMC5843_CORE_H
-
-#include <linux/regmap.h>
-#include <linux/iio/iio.h>
-
-#define HMC5843_CONFIG_REG_A			0x00
-#define HMC5843_CONFIG_REG_B			0x01
-#define HMC5843_MODE_REG			0x02
-#define HMC5843_DATA_OUT_MSB_REGS		0x03
-#define HMC5843_STATUS_REG			0x09
-#define HMC5843_ID_REG				0x0a
-#define HMC5843_ID_END				0x0c
-
-enum hmc5843_ids {
-	HMC5843_ID,
-	HMC5883_ID,
-	HMC5883L_ID,
-	HMC5983_ID,
-};
-
-/**
- * struct hcm5843_data	- device specific data
- * @dev:		actual device
- * @lock:		update and read regmap data
- * @regmap:		hardware access register maps
- * @variant:		describe chip variants
- * @buffer:		3x 16-bit channels + padding + 64-bit timestamp
- */
-struct hmc5843_data {
-	struct device *dev;
-	struct mutex lock;
-	struct regmap *regmap;
-	const struct hmc5843_chip_info *variant;
-	__be16 buffer[8];
-};
-
-int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
-			 enum hmc5843_ids id, const char *name);
-int hmc5843_common_remove(struct device *dev);
-
-int hmc5843_common_suspend(struct device *dev);
-int hmc5843_common_resume(struct device *dev);
-
-#ifdef CONFIG_PM_SLEEP
-static SIMPLE_DEV_PM_OPS(hmc5843_pm_ops,
-		hmc5843_common_suspend,
-		hmc5843_common_resume);
-#define HMC5843_PM_OPS (&hmc5843_pm_ops)
-#else
-#define HMC5843_PM_OPS NULL
-#endif
-
-#endif /* HMC5843_CORE_H */
diff --git a/drivers/staging/iio/magnetometer/hmc5843_core.c b/drivers/staging/iio/magnetometer/hmc5843_core.c
deleted file mode 100644
index 9ee9a42..0000000
--- a/drivers/staging/iio/magnetometer/hmc5843_core.c
+++ /dev/null
@@ -1,646 +0,0 @@
-/*
- * Device driver for the the HMC5843 multi-chip module designed
- * for low field magnetic sensing.
- *
- * Copyright (C) 2010 Texas Instruments
- *
- * Author: Shubhrajyoti Datta <shubhrajyoti@ti.com>
- * Acknowledgment: Jonathan Cameron <jic23@kernel.org> for valuable inputs.
- * Support for HMC5883 and HMC5883L by Peter Meerwald <pmeerw@pmeerw.net>.
- * Split to multiple files by Josef Gajdusek <atx@atx.name> - 2014
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/module.h>
-#include <linux/regmap.h>
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include <linux/iio/trigger_consumer.h>
-#include <linux/iio/buffer.h>
-#include <linux/iio/triggered_buffer.h>
-#include <linux/delay.h>
-
-#include "hmc5843.h"
-
-/*
- * Range gain settings in (+-)Ga
- * Beware: HMC5843 and HMC5883 have different recommended sensor field
- * ranges; default corresponds to +-1.0 Ga and +-1.3 Ga, respectively
- */
-#define HMC5843_RANGE_GAIN_OFFSET		0x05
-#define HMC5843_RANGE_GAIN_DEFAULT		0x01
-#define HMC5843_RANGE_GAIN_MASK		0xe0
-
-/* Device status */
-#define HMC5843_DATA_READY			0x01
-#define HMC5843_DATA_OUTPUT_LOCK		0x02
-
-/* Mode register configuration */
-#define HMC5843_MODE_CONVERSION_CONTINUOUS	0x00
-#define HMC5843_MODE_CONVERSION_SINGLE		0x01
-#define HMC5843_MODE_IDLE			0x02
-#define HMC5843_MODE_SLEEP			0x03
-#define HMC5843_MODE_MASK			0x03
-
-/*
- * HMC5843: Minimum data output rate
- * HMC5883: Typical data output rate
- */
-#define HMC5843_RATE_OFFSET			0x02
-#define HMC5843_RATE_DEFAULT			0x04
-#define HMC5843_RATE_MASK		0x1c
-
-/* Device measurement configuration */
-#define HMC5843_MEAS_CONF_NORMAL		0x00
-#define HMC5843_MEAS_CONF_POSITIVE_BIAS		0x01
-#define HMC5843_MEAS_CONF_NEGATIVE_BIAS		0x02
-#define HMC5843_MEAS_CONF_MASK			0x03
-
-/* Scaling factors: 10000000/Gain */
-static const int hmc5843_regval_to_nanoscale[] = {
-	6173, 7692, 10309, 12821, 18868, 21739, 25641, 35714
-};
-
-static const int hmc5883_regval_to_nanoscale[] = {
-	7812, 9766, 13021, 16287, 24096, 27701, 32573, 45662
-};
-
-static const int hmc5883l_regval_to_nanoscale[] = {
-	7299, 9174, 12195, 15152, 22727, 25641, 30303, 43478
-};
-
-/*
- * From the datasheet:
- * Value	| HMC5843		| HMC5883/HMC5883L
- *		| Data output rate (Hz)	| Data output rate (Hz)
- * 0		| 0.5			| 0.75
- * 1		| 1			| 1.5
- * 2		| 2			| 3
- * 3		| 5			| 7.5
- * 4		| 10 (default)		| 15
- * 5		| 20			| 30
- * 6		| 50			| 75
- * 7		| Not used		| Not used
- */
-static const int hmc5843_regval_to_samp_freq[][2] = {
-	{0, 500000}, {1, 0}, {2, 0}, {5, 0}, {10, 0}, {20, 0}, {50, 0}
-};
-
-static const int hmc5883_regval_to_samp_freq[][2] = {
-	{0, 750000}, {1, 500000}, {3, 0}, {7, 500000}, {15, 0}, {30, 0},
-	{75, 0}
-};
-
-static const int hmc5983_regval_to_samp_freq[][2] = {
-	{0, 750000}, {1, 500000}, {3, 0}, {7, 500000}, {15, 0}, {30, 0},
-	{75, 0}, {220, 0}
-};
-
-/* Describe chip variants */
-struct hmc5843_chip_info {
-	const struct iio_chan_spec *channels;
-	const int (*regval_to_samp_freq)[2];
-	const int n_regval_to_samp_freq;
-	const int *regval_to_nanoscale;
-	const int n_regval_to_nanoscale;
-};
-
-/* The lower two bits contain the current conversion mode */
-static s32 hmc5843_set_mode(struct hmc5843_data *data, u8 operating_mode)
-{
-	int ret;
-
-	mutex_lock(&data->lock);
-	ret = regmap_update_bits(data->regmap, HMC5843_MODE_REG,
-				 HMC5843_MODE_MASK, operating_mode);
-	mutex_unlock(&data->lock);
-
-	return ret;
-}
-
-static int hmc5843_wait_measurement(struct hmc5843_data *data)
-{
-	int tries = 150;
-	unsigned int val;
-	int ret;
-
-	while (tries-- > 0) {
-		ret = regmap_read(data->regmap, HMC5843_STATUS_REG, &val);
-		if (ret < 0)
-			return ret;
-		if (val & HMC5843_DATA_READY)
-			break;
-		msleep(20);
-	}
-
-	if (tries < 0) {
-		dev_err(data->dev, "data not ready\n");
-		return -EIO;
-	}
-
-	return 0;
-}
-
-/* Return the measurement value from the specified channel */
-static int hmc5843_read_measurement(struct hmc5843_data *data,
-				    int idx, int *val)
-{
-	__be16 values[3];
-	int ret;
-
-	mutex_lock(&data->lock);
-	ret = hmc5843_wait_measurement(data);
-	if (ret < 0) {
-		mutex_unlock(&data->lock);
-		return ret;
-	}
-	ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS,
-			       values, sizeof(values));
-	mutex_unlock(&data->lock);
-	if (ret < 0)
-		return ret;
-
-	*val = sign_extend32(be16_to_cpu(values[idx]), 15);
-	return IIO_VAL_INT;
-}
-
-/*
- * API for setting the measurement configuration to
- * Normal, Positive bias and Negative bias
- *
- * From the datasheet:
- * 0 - Normal measurement configuration (default): In normal measurement
- *     configuration the device follows normal measurement flow. Pins BP
- *     and BN are left floating and high impedance.
- *
- * 1 - Positive bias configuration: In positive bias configuration, a
- *     positive current is forced across the resistive load on pins BP
- *     and BN.
- *
- * 2 - Negative bias configuration. In negative bias configuration, a
- *     negative current is forced across the resistive load on pins BP
- *     and BN.
- *
- */
-static int hmc5843_set_meas_conf(struct hmc5843_data *data, u8 meas_conf)
-{
-	int ret;
-
-	mutex_lock(&data->lock);
-	ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A,
-				 HMC5843_MEAS_CONF_MASK, meas_conf);
-	mutex_unlock(&data->lock);
-
-	return ret;
-}
-
-static
-ssize_t hmc5843_show_measurement_configuration(struct device *dev,
-					       struct device_attribute *attr,
-					       char *buf)
-{
-	struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
-	unsigned int val;
-	int ret;
-
-	ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_A, &val);
-	if (ret)
-		return ret;
-	val &= HMC5843_MEAS_CONF_MASK;
-
-	return sprintf(buf, "%d\n", val);
-}
-
-static
-ssize_t hmc5843_set_measurement_configuration(struct device *dev,
-					      struct device_attribute *attr,
-					      const char *buf,
-					      size_t count)
-{
-	struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
-	unsigned long meas_conf = 0;
-	int ret;
-
-	ret = kstrtoul(buf, 10, &meas_conf);
-	if (ret)
-		return ret;
-	if (meas_conf >= HMC5843_MEAS_CONF_MASK)
-		return -EINVAL;
-
-	ret = hmc5843_set_meas_conf(data, meas_conf);
-
-	return (ret < 0) ? ret : count;
-}
-
-static IIO_DEVICE_ATTR(meas_conf,
-			S_IWUSR | S_IRUGO,
-			hmc5843_show_measurement_configuration,
-			hmc5843_set_measurement_configuration,
-			0);
-
-static
-ssize_t hmc5843_show_samp_freq_avail(struct device *dev,
-				     struct device_attribute *attr, char *buf)
-{
-	struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
-	size_t len = 0;
-	int i;
-
-	for (i = 0; i < data->variant->n_regval_to_samp_freq; i++)
-		len += scnprintf(buf + len, PAGE_SIZE - len,
-			"%d.%d ", data->variant->regval_to_samp_freq[i][0],
-			data->variant->regval_to_samp_freq[i][1]);
-
-	/* replace trailing space by newline */
-	buf[len - 1] = '\n';
-
-	return len;
-}
-
-static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(hmc5843_show_samp_freq_avail);
-
-static int hmc5843_set_samp_freq(struct hmc5843_data *data, u8 rate)
-{
-	int ret;
-
-	mutex_lock(&data->lock);
-	ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A,
-				 HMC5843_RATE_MASK,
-				 rate << HMC5843_RATE_OFFSET);
-	mutex_unlock(&data->lock);
-
-	return ret;
-}
-
-static int hmc5843_get_samp_freq_index(struct hmc5843_data *data,
-				       int val, int val2)
-{
-	int i;
-
-	for (i = 0; i < data->variant->n_regval_to_samp_freq; i++)
-		if (val == data->variant->regval_to_samp_freq[i][0] &&
-		    val2 == data->variant->regval_to_samp_freq[i][1])
-			return i;
-
-	return -EINVAL;
-}
-
-static int hmc5843_set_range_gain(struct hmc5843_data *data, u8 range)
-{
-	int ret;
-
-	mutex_lock(&data->lock);
-	ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_B,
-				 HMC5843_RANGE_GAIN_MASK,
-				 range << HMC5843_RANGE_GAIN_OFFSET);
-	mutex_unlock(&data->lock);
-
-	return ret;
-}
-
-static ssize_t hmc5843_show_scale_avail(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
-
-	size_t len = 0;
-	int i;
-
-	for (i = 0; i < data->variant->n_regval_to_nanoscale; i++)
-		len += scnprintf(buf + len, PAGE_SIZE - len,
-			"0.%09d ", data->variant->regval_to_nanoscale[i]);
-
-	/* replace trailing space by newline */
-	buf[len - 1] = '\n';
-
-	return len;
-}
-
-static IIO_DEVICE_ATTR(scale_available, S_IRUGO,
-	hmc5843_show_scale_avail, NULL, 0);
-
-static int hmc5843_get_scale_index(struct hmc5843_data *data, int val, int val2)
-{
-	int i;
-
-	if (val)
-		return -EINVAL;
-
-	for (i = 0; i < data->variant->n_regval_to_nanoscale; i++)
-		if (val2 == data->variant->regval_to_nanoscale[i])
-			return i;
-
-	return -EINVAL;
-}
-
-static int hmc5843_read_raw(struct iio_dev *indio_dev,
-			    struct iio_chan_spec const *chan,
-			    int *val, int *val2, long mask)
-{
-	struct hmc5843_data *data = iio_priv(indio_dev);
-	unsigned int rval;
-	int ret;
-
-	switch (mask) {
-	case IIO_CHAN_INFO_RAW:
-		return hmc5843_read_measurement(data, chan->scan_index, val);
-	case IIO_CHAN_INFO_SCALE:
-		ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_B, &rval);
-		if (ret < 0)
-			return ret;
-		rval >>= HMC5843_RANGE_GAIN_OFFSET;
-		*val = 0;
-		*val2 = data->variant->regval_to_nanoscale[rval];
-		return IIO_VAL_INT_PLUS_NANO;
-	case IIO_CHAN_INFO_SAMP_FREQ:
-		ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_A, &rval);
-		if (ret < 0)
-			return ret;
-		rval >>= HMC5843_RATE_OFFSET;
-		*val = data->variant->regval_to_samp_freq[rval][0];
-		*val2 = data->variant->regval_to_samp_freq[rval][1];
-		return IIO_VAL_INT_PLUS_MICRO;
-	}
-	return -EINVAL;
-}
-
-static int hmc5843_write_raw(struct iio_dev *indio_dev,
-			     struct iio_chan_spec const *chan,
-			     int val, int val2, long mask)
-{
-	struct hmc5843_data *data = iio_priv(indio_dev);
-	int rate, range;
-
-	switch (mask) {
-	case IIO_CHAN_INFO_SAMP_FREQ:
-		rate = hmc5843_get_samp_freq_index(data, val, val2);
-		if (rate < 0)
-			return -EINVAL;
-
-		return hmc5843_set_samp_freq(data, rate);
-	case IIO_CHAN_INFO_SCALE:
-		range = hmc5843_get_scale_index(data, val, val2);
-		if (range < 0)
-			return -EINVAL;
-
-		return hmc5843_set_range_gain(data, range);
-	default:
-		return -EINVAL;
-	}
-}
-
-static int hmc5843_write_raw_get_fmt(struct iio_dev *indio_dev,
-				     struct iio_chan_spec const *chan,
-				     long mask)
-{
-	switch (mask) {
-	case IIO_CHAN_INFO_SAMP_FREQ:
-		return IIO_VAL_INT_PLUS_MICRO;
-	case IIO_CHAN_INFO_SCALE:
-		return IIO_VAL_INT_PLUS_NANO;
-	default:
-		return -EINVAL;
-	}
-}
-
-static irqreturn_t hmc5843_trigger_handler(int irq, void *p)
-{
-	struct iio_poll_func *pf = p;
-	struct iio_dev *indio_dev = pf->indio_dev;
-	struct hmc5843_data *data = iio_priv(indio_dev);
-	int ret;
-
-	mutex_lock(&data->lock);
-	ret = hmc5843_wait_measurement(data);
-	if (ret < 0) {
-		mutex_unlock(&data->lock);
-		goto done;
-	}
-
-	ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS,
-			       data->buffer, 3 * sizeof(__be16));
-
-	mutex_unlock(&data->lock);
-	if (ret < 0)
-		goto done;
-
-	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
-					   iio_get_time_ns());
-
-done:
-	iio_trigger_notify_done(indio_dev->trig);
-
-	return IRQ_HANDLED;
-}
-
-#define HMC5843_CHANNEL(axis, idx)					\
-	{								\
-		.type = IIO_MAGN,					\
-		.modified = 1,						\
-		.channel2 = IIO_MOD_##axis,				\
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
-		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |	\
-			BIT(IIO_CHAN_INFO_SAMP_FREQ),			\
-		.scan_index = idx,					\
-		.scan_type = {						\
-			.sign = 's',					\
-			.realbits = 16,					\
-			.storagebits = 16,				\
-			.endianness = IIO_BE,				\
-		},							\
-	}
-
-static const struct iio_chan_spec hmc5843_channels[] = {
-	HMC5843_CHANNEL(X, 0),
-	HMC5843_CHANNEL(Y, 1),
-	HMC5843_CHANNEL(Z, 2),
-	IIO_CHAN_SOFT_TIMESTAMP(3),
-};
-
-/* Beware: Y and Z are exchanged on HMC5883 and 5983 */
-static const struct iio_chan_spec hmc5883_channels[] = {
-	HMC5843_CHANNEL(X, 0),
-	HMC5843_CHANNEL(Z, 1),
-	HMC5843_CHANNEL(Y, 2),
-	IIO_CHAN_SOFT_TIMESTAMP(3),
-};
-
-static struct attribute *hmc5843_attributes[] = {
-	&iio_dev_attr_meas_conf.dev_attr.attr,
-	&iio_dev_attr_scale_available.dev_attr.attr,
-	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hmc5843_group = {
-	.attrs = hmc5843_attributes,
-};
-
-static const struct hmc5843_chip_info hmc5843_chip_info_tbl[] = {
-	[HMC5843_ID] = {
-		.channels = hmc5843_channels,
-		.regval_to_samp_freq = hmc5843_regval_to_samp_freq,
-		.n_regval_to_samp_freq =
-				ARRAY_SIZE(hmc5843_regval_to_samp_freq),
-		.regval_to_nanoscale = hmc5843_regval_to_nanoscale,
-		.n_regval_to_nanoscale =
-				ARRAY_SIZE(hmc5843_regval_to_nanoscale),
-	},
-	[HMC5883_ID] = {
-		.channels = hmc5883_channels,
-		.regval_to_samp_freq = hmc5883_regval_to_samp_freq,
-		.n_regval_to_samp_freq =
-				ARRAY_SIZE(hmc5883_regval_to_samp_freq),
-		.regval_to_nanoscale = hmc5883_regval_to_nanoscale,
-		.n_regval_to_nanoscale =
-				ARRAY_SIZE(hmc5883_regval_to_nanoscale),
-	},
-	[HMC5883L_ID] = {
-		.channels = hmc5883_channels,
-		.regval_to_samp_freq = hmc5883_regval_to_samp_freq,
-		.n_regval_to_samp_freq =
-				ARRAY_SIZE(hmc5883_regval_to_samp_freq),
-		.regval_to_nanoscale = hmc5883l_regval_to_nanoscale,
-		.n_regval_to_nanoscale =
-				ARRAY_SIZE(hmc5883l_regval_to_nanoscale),
-	},
-	[HMC5983_ID] = {
-		.channels = hmc5883_channels,
-		.regval_to_samp_freq = hmc5983_regval_to_samp_freq,
-		.n_regval_to_samp_freq =
-				ARRAY_SIZE(hmc5983_regval_to_samp_freq),
-		.regval_to_nanoscale = hmc5883l_regval_to_nanoscale,
-		.n_regval_to_nanoscale =
-				ARRAY_SIZE(hmc5883l_regval_to_nanoscale),
-	}
-};
-
-static int hmc5843_init(struct hmc5843_data *data)
-{
-	int ret;
-	u8 id[3];
-
-	ret = regmap_bulk_read(data->regmap, HMC5843_ID_REG,
-			       id, ARRAY_SIZE(id));
-	if (ret < 0)
-		return ret;
-	if (id[0] != 'H' || id[1] != '4' || id[2] != '3') {
-		dev_err(data->dev, "no HMC5843/5883/5883L/5983 sensor\n");
-		return -ENODEV;
-	}
-
-	ret = hmc5843_set_meas_conf(data, HMC5843_MEAS_CONF_NORMAL);
-	if (ret < 0)
-		return ret;
-	ret = hmc5843_set_samp_freq(data, HMC5843_RATE_DEFAULT);
-	if (ret < 0)
-		return ret;
-	ret = hmc5843_set_range_gain(data, HMC5843_RANGE_GAIN_DEFAULT);
-	if (ret < 0)
-		return ret;
-	return hmc5843_set_mode(data, HMC5843_MODE_CONVERSION_CONTINUOUS);
-}
-
-static const struct iio_info hmc5843_info = {
-	.attrs = &hmc5843_group,
-	.read_raw = hmc5843_read_raw,
-	.write_raw = hmc5843_write_raw,
-	.write_raw_get_fmt = hmc5843_write_raw_get_fmt,
-	.driver_module = THIS_MODULE,
-};
-
-static const unsigned long hmc5843_scan_masks[] = {0x7, 0};
-
-int hmc5843_common_suspend(struct device *dev)
-{
-	return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)),
-				HMC5843_MODE_SLEEP);
-}
-EXPORT_SYMBOL(hmc5843_common_suspend);
-
-int hmc5843_common_resume(struct device *dev)
-{
-	return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)),
-		HMC5843_MODE_CONVERSION_CONTINUOUS);
-}
-EXPORT_SYMBOL(hmc5843_common_resume);
-
-int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
-			 enum hmc5843_ids id, const char *name)
-{
-	struct hmc5843_data *data;
-	struct iio_dev *indio_dev;
-	int ret;
-
-	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
-	if (!indio_dev)
-		return -ENOMEM;
-
-	dev_set_drvdata(dev, indio_dev);
-
-	/* default settings at probe */
-	data = iio_priv(indio_dev);
-	data->dev = dev;
-	data->regmap = regmap;
-	data->variant = &hmc5843_chip_info_tbl[id];
-	mutex_init(&data->lock);
-
-	indio_dev->dev.parent = dev;
-	indio_dev->name = name;
-	indio_dev->info = &hmc5843_info;
-	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->channels = data->variant->channels;
-	indio_dev->num_channels = 4;
-	indio_dev->available_scan_masks = hmc5843_scan_masks;
-
-	ret = hmc5843_init(data);
-	if (ret < 0)
-		return ret;
-
-	ret = iio_triggered_buffer_setup(indio_dev, NULL,
-					 hmc5843_trigger_handler, NULL);
-	if (ret < 0)
-		goto buffer_setup_err;
-
-	ret = iio_device_register(indio_dev);
-	if (ret < 0)
-		goto buffer_cleanup;
-
-	return 0;
-
-buffer_cleanup:
-	iio_triggered_buffer_cleanup(indio_dev);
-buffer_setup_err:
-	hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP);
-	return ret;
-}
-EXPORT_SYMBOL(hmc5843_common_probe);
-
-int hmc5843_common_remove(struct device *dev)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-
-	iio_device_unregister(indio_dev);
-	iio_triggered_buffer_cleanup(indio_dev);
-
-	/*  sleep mode to save power */
-	hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP);
-
-	return 0;
-}
-EXPORT_SYMBOL(hmc5843_common_remove);
-
-MODULE_AUTHOR("Shubhrajyoti Datta <shubhrajyoti@ti.com>");
-MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 core driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/magnetometer/hmc5843_i2c.c b/drivers/staging/iio/magnetometer/hmc5843_i2c.c
deleted file mode 100644
index 3de7f44..0000000
--- a/drivers/staging/iio/magnetometer/hmc5843_i2c.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * i2c driver for hmc5843/5843/5883/5883l/5983
- *
- * Split from hmc5843.c
- * Copyright (C) Josef Gajdusek <atx@atx.name>
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/regmap.h>
-#include <linux/iio/iio.h>
-#include <linux/iio/triggered_buffer.h>
-
-#include "hmc5843.h"
-
-static const struct regmap_range hmc5843_readable_ranges[] = {
-	regmap_reg_range(0, HMC5843_ID_END),
-};
-
-static const struct regmap_access_table hmc5843_readable_table = {
-	.yes_ranges = hmc5843_readable_ranges,
-	.n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
-};
-
-static const struct regmap_range hmc5843_writable_ranges[] = {
-	regmap_reg_range(0, HMC5843_MODE_REG),
-};
-
-static const struct regmap_access_table hmc5843_writable_table = {
-	.yes_ranges = hmc5843_writable_ranges,
-	.n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
-};
-
-static const struct regmap_range hmc5843_volatile_ranges[] = {
-	regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
-};
-
-static const struct regmap_access_table hmc5843_volatile_table = {
-	.yes_ranges = hmc5843_volatile_ranges,
-	.n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
-};
-
-static const struct regmap_config hmc5843_i2c_regmap_config = {
-	.reg_bits = 8,
-	.val_bits = 8,
-
-	.rd_table = &hmc5843_readable_table,
-	.wr_table = &hmc5843_writable_table,
-	.volatile_table = &hmc5843_volatile_table,
-
-	.cache_type = REGCACHE_RBTREE,
-};
-
-static int hmc5843_i2c_probe(struct i2c_client *cli,
-			     const struct i2c_device_id *id)
-{
-	return hmc5843_common_probe(&cli->dev,
-			devm_regmap_init_i2c(cli, &hmc5843_i2c_regmap_config),
-			id->driver_data, id->name);
-}
-
-static int hmc5843_i2c_remove(struct i2c_client *client)
-{
-	return hmc5843_common_remove(&client->dev);
-}
-
-static const struct i2c_device_id hmc5843_id[] = {
-	{ "hmc5843", HMC5843_ID },
-	{ "hmc5883", HMC5883_ID },
-	{ "hmc5883l", HMC5883L_ID },
-	{ "hmc5983", HMC5983_ID },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, hmc5843_id);
-
-static const struct of_device_id hmc5843_of_match[] = {
-	{ .compatible = "honeywell,hmc5843", .data = (void *)HMC5843_ID },
-	{ .compatible = "honeywell,hmc5883", .data = (void *)HMC5883_ID },
-	{ .compatible = "honeywell,hmc5883l", .data = (void *)HMC5883L_ID },
-	{ .compatible = "honeywell,hmc5983", .data = (void *)HMC5983_ID },
-	{}
-};
-MODULE_DEVICE_TABLE(of, hmc5843_of_match);
-
-static struct i2c_driver hmc5843_driver = {
-	.driver = {
-		.name	= "hmc5843",
-		.pm	= HMC5843_PM_OPS,
-		.of_match_table = hmc5843_of_match,
-	},
-	.id_table	= hmc5843_id,
-	.probe		= hmc5843_i2c_probe,
-	.remove		= hmc5843_i2c_remove,
-};
-module_i2c_driver(hmc5843_driver);
-
-MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
-MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 i2c driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/magnetometer/hmc5843_spi.c b/drivers/staging/iio/magnetometer/hmc5843_spi.c
deleted file mode 100644
index 535f03a..0000000
--- a/drivers/staging/iio/magnetometer/hmc5843_spi.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * SPI driver for hmc5983
- *
- * Copyright (C) Josef Gajdusek <atx@atx.name>
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/spi/spi.h>
-#include <linux/iio/iio.h>
-
-#include "hmc5843.h"
-
-static const struct regmap_range hmc5843_readable_ranges[] = {
-		regmap_reg_range(0, HMC5843_ID_END),
-};
-
-static const struct regmap_access_table hmc5843_readable_table = {
-		.yes_ranges = hmc5843_readable_ranges,
-		.n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
-};
-
-static const struct regmap_range hmc5843_writable_ranges[] = {
-		regmap_reg_range(0, HMC5843_MODE_REG),
-};
-
-static const struct regmap_access_table hmc5843_writable_table = {
-		.yes_ranges = hmc5843_writable_ranges,
-		.n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
-};
-
-static const struct regmap_range hmc5843_volatile_ranges[] = {
-		regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
-};
-
-static const struct regmap_access_table hmc5843_volatile_table = {
-		.yes_ranges = hmc5843_volatile_ranges,
-		.n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
-};
-
-static const struct regmap_config hmc5843_spi_regmap_config = {
-		.reg_bits = 8,
-		.val_bits = 8,
-
-		.rd_table = &hmc5843_readable_table,
-		.wr_table = &hmc5843_writable_table,
-		.volatile_table = &hmc5843_volatile_table,
-
-		/* Autoincrement address pointer */
-		.read_flag_mask = 0xc0,
-
-		.cache_type = REGCACHE_RBTREE,
-};
-
-static int hmc5843_spi_probe(struct spi_device *spi)
-{
-	int ret;
-	const struct spi_device_id *id = spi_get_device_id(spi);
-
-	spi->mode = SPI_MODE_3;
-	spi->max_speed_hz = 8000000;
-	spi->bits_per_word = 8;
-	ret = spi_setup(spi);
-	if (ret)
-		return ret;
-
-	return hmc5843_common_probe(&spi->dev,
-			devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config),
-			id->driver_data, id->name);
-}
-
-static int hmc5843_spi_remove(struct spi_device *spi)
-{
-	return hmc5843_common_remove(&spi->dev);
-}
-
-static const struct spi_device_id hmc5843_id[] = {
-	{ "hmc5983", HMC5983_ID },
-	{ }
-};
-MODULE_DEVICE_TABLE(spi, hmc5843_id);
-
-static struct spi_driver hmc5843_driver = {
-		.driver = {
-				.name = "hmc5843",
-				.pm = HMC5843_PM_OPS,
-		},
-		.id_table = hmc5843_id,
-		.probe = hmc5843_spi_probe,
-		.remove = hmc5843_spi_remove,
-};
-
-module_spi_driver(hmc5843_driver);
-
-MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
-MODULE_DESCRIPTION("HMC5983 SPI driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/trigger/Kconfig b/drivers/staging/iio/trigger/Kconfig
index 710a2f3..0b01d24 100644
--- a/drivers/staging/iio/trigger/Kconfig
+++ b/drivers/staging/iio/trigger/Kconfig
@@ -5,16 +5,6 @@ comment "Triggers - standalone"
 
 if IIO_TRIGGER
 
-config IIO_PERIODIC_RTC_TRIGGER
-	tristate "Periodic RTC triggers"
-	depends on RTC_CLASS
-	help
-	  Provides support for using periodic capable real time
-	  clocks as IIO triggers.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called iio-trig-periodic-rtc.
-
 config IIO_BFIN_TMR_TRIGGER
 	tristate "Blackfin TIMER trigger"
 	depends on BLACKFIN
diff --git a/drivers/staging/iio/trigger/Makefile b/drivers/staging/iio/trigger/Makefile
index 238481b..1300a21 100644
--- a/drivers/staging/iio/trigger/Makefile
+++ b/drivers/staging/iio/trigger/Makefile
@@ -2,5 +2,4 @@
 # Makefile for triggers not associated with iio-devices
 #
 
-obj-$(CONFIG_IIO_PERIODIC_RTC_TRIGGER) += iio-trig-periodic-rtc.o
 obj-$(CONFIG_IIO_BFIN_TMR_TRIGGER) += iio-trig-bfin-timer.o
diff --git a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
deleted file mode 100644
index 00d1393..0000000
--- a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
+++ /dev/null
@@ -1,216 +0,0 @@
-/* The industrial I/O periodic RTC trigger driver
- *
- * Copyright (c) 2008 Jonathan Cameron
- *
- * 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.
- *
- * This is a heavily rewritten version of the periodic timer system in
- * earlier version of industrialio.  It supplies the same functionality
- * but via a trigger rather than a specific periodic timer system.
- */
-
-#include <linux/platform_device.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/rtc.h>
-#include <linux/iio/iio.h>
-#include <linux/iio/trigger.h>
-
-static LIST_HEAD(iio_prtc_trigger_list);
-static DEFINE_MUTEX(iio_prtc_trigger_list_lock);
-
-struct iio_prtc_trigger_info {
-	struct rtc_device *rtc;
-	unsigned int frequency;
-	struct rtc_task task;
-	bool state;
-};
-
-static int iio_trig_periodic_rtc_set_state(struct iio_trigger *trig, bool state)
-{
-	struct iio_prtc_trigger_info *trig_info = iio_trigger_get_drvdata(trig);
-	int ret;
-
-	if (trig_info->frequency == 0 && state)
-		return -EINVAL;
-	dev_dbg(&trig_info->rtc->dev, "trigger frequency is %u\n",
-		trig_info->frequency);
-	ret = rtc_irq_set_state(trig_info->rtc, &trig_info->task, state);
-	if (!ret)
-		trig_info->state = state;
-
-	return ret;
-}
-
-static ssize_t iio_trig_periodic_read_freq(struct device *dev,
-					   struct device_attribute *attr,
-					   char *buf)
-{
-	struct iio_trigger *trig = to_iio_trigger(dev);
-	struct iio_prtc_trigger_info *trig_info = iio_trigger_get_drvdata(trig);
-
-	return sprintf(buf, "%u\n", trig_info->frequency);
-}
-
-static ssize_t iio_trig_periodic_write_freq(struct device *dev,
-					    struct device_attribute *attr,
-					    const char *buf,
-					    size_t len)
-{
-	struct iio_trigger *trig = to_iio_trigger(dev);
-	struct iio_prtc_trigger_info *trig_info = iio_trigger_get_drvdata(trig);
-	unsigned int val;
-	int ret;
-
-	ret = kstrtouint(buf, 10, &val);
-	if (ret)
-		goto error_ret;
-
-	if (val > 0) {
-		ret = rtc_irq_set_freq(trig_info->rtc, &trig_info->task, val);
-		if (ret == 0 && trig_info->state && trig_info->frequency == 0)
-			ret = rtc_irq_set_state(trig_info->rtc,
-						&trig_info->task, 1);
-	} else {
-		ret = rtc_irq_set_state(trig_info->rtc, &trig_info->task, 0);
-	}
-	if (ret)
-		goto error_ret;
-
-	trig_info->frequency = val;
-
-	return len;
-
-error_ret:
-	return ret;
-}
-
-static DEVICE_ATTR(frequency, S_IRUGO | S_IWUSR,
-	    iio_trig_periodic_read_freq,
-	    iio_trig_periodic_write_freq);
-
-static struct attribute *iio_trig_prtc_attrs[] = {
-	&dev_attr_frequency.attr,
-	NULL,
-};
-
-static const struct attribute_group iio_trig_prtc_attr_group = {
-	.attrs = iio_trig_prtc_attrs,
-};
-
-static const struct attribute_group *iio_trig_prtc_attr_groups[] = {
-	&iio_trig_prtc_attr_group,
-	NULL
-};
-
-static void iio_prtc_trigger_poll(void *private_data)
-{
-	iio_trigger_poll(private_data);
-}
-
-static const struct iio_trigger_ops iio_prtc_trigger_ops = {
-	.owner = THIS_MODULE,
-	.set_trigger_state = &iio_trig_periodic_rtc_set_state,
-};
-
-static int iio_trig_periodic_rtc_probe(struct platform_device *dev)
-{
-	char **pdata = dev->dev.platform_data;
-	struct iio_prtc_trigger_info *trig_info;
-	struct iio_trigger *trig, *trig2;
-
-	int i, ret;
-
-	for (i = 0;; i++) {
-		if (!pdata[i])
-			break;
-		trig = iio_trigger_alloc("periodic%s", pdata[i]);
-		if (!trig) {
-			ret = -ENOMEM;
-			goto error_free_completed_registrations;
-		}
-		list_add(&trig->alloc_list, &iio_prtc_trigger_list);
-
-		trig_info = kzalloc(sizeof(*trig_info), GFP_KERNEL);
-		if (!trig_info) {
-			ret = -ENOMEM;
-			goto error_put_trigger_and_remove_from_list;
-		}
-		iio_trigger_set_drvdata(trig, trig_info);
-		trig->ops = &iio_prtc_trigger_ops;
-		/* RTC access */
-		trig_info->rtc = rtc_class_open(pdata[i]);
-		if (!trig_info->rtc) {
-			ret = -EINVAL;
-			goto error_free_trig_info;
-		}
-		trig_info->task.func = iio_prtc_trigger_poll;
-		trig_info->task.private_data = trig;
-		ret = rtc_irq_register(trig_info->rtc, &trig_info->task);
-		if (ret)
-			goto error_close_rtc;
-		trig->dev.groups = iio_trig_prtc_attr_groups;
-		ret = iio_trigger_register(trig);
-		if (ret)
-			goto error_unregister_rtc_irq;
-	}
-	return 0;
-error_unregister_rtc_irq:
-	rtc_irq_unregister(trig_info->rtc, &trig_info->task);
-error_close_rtc:
-	rtc_class_close(trig_info->rtc);
-error_free_trig_info:
-	kfree(trig_info);
-error_put_trigger_and_remove_from_list:
-	list_del(&trig->alloc_list);
-	iio_trigger_put(trig);
-error_free_completed_registrations:
-	list_for_each_entry_safe(trig,
-				 trig2,
-				 &iio_prtc_trigger_list,
-				 alloc_list) {
-		trig_info = iio_trigger_get_drvdata(trig);
-		rtc_irq_unregister(trig_info->rtc, &trig_info->task);
-		rtc_class_close(trig_info->rtc);
-		kfree(trig_info);
-		iio_trigger_unregister(trig);
-	}
-	return ret;
-}
-
-static int iio_trig_periodic_rtc_remove(struct platform_device *dev)
-{
-	struct iio_trigger *trig, *trig2;
-	struct iio_prtc_trigger_info *trig_info;
-
-	mutex_lock(&iio_prtc_trigger_list_lock);
-	list_for_each_entry_safe(trig,
-				 trig2,
-				 &iio_prtc_trigger_list,
-				 alloc_list) {
-		trig_info = iio_trigger_get_drvdata(trig);
-		rtc_irq_unregister(trig_info->rtc, &trig_info->task);
-		rtc_class_close(trig_info->rtc);
-		kfree(trig_info);
-		iio_trigger_unregister(trig);
-	}
-	mutex_unlock(&iio_prtc_trigger_list_lock);
-	return 0;
-}
-
-static struct platform_driver iio_trig_periodic_rtc_driver = {
-	.probe = iio_trig_periodic_rtc_probe,
-	.remove = iio_trig_periodic_rtc_remove,
-	.driver = {
-		.name = "iio_prtc_trigger",
-	},
-};
-
-module_platform_driver(iio_trig_periodic_rtc_driver);
-
-MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
-MODULE_DESCRIPTION("Periodic realtime clock trigger for the iio subsystem");
-MODULE_LICENSE("GPL v2");