Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull input subsystem updates from Dmitry Torokhov:

 - a big update from Mauro converting input documentation to ReST format

 - Synaptics PS/2 is now aware of SMBus companion devices, which means
   that we can now use native RMI4 protocol to handle touchpads, instead
   of relying on legacy PS/2 mode.

 - we removed support from BMA180 accelerometer from input devices as it
   is now handled properly by IIO

 - update to TSC2007 to corretcly report pressure

 - other miscellaneous driver fixes.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (152 commits)
  Input: ar1021_i2c - use BIT to check for a bit
  Input: twl4030-pwrbutton - use input_set_capability() helper
  Input: twl4030-pwrbutton - use correct device for irq request
  Input: ar1021_i2c - enable touch mode during open
  Input: add uinput documentation
  dt-bindings: input: add bindings document for ar1021_i2c driver
  dt-bindings: input: rotary-encoder: fix typo
  Input: xen-kbdfront - add module parameter for setting resolution
  ARM: pxa/raumfeld: fix compile error in rotary controller resources
  Input: xpad - do not suggest writing to Dominic
  Input: xpad - don't use literal blocks inside footnotes
  Input: xpad - note that usb/devices is now at /sys/kernel/debug/
  Input: docs - freshen up introduction
  Input: docs - split input docs into kernel- and user-facing
  Input: docs - note that MT-A protocol is obsolete
  Input: docs - update joystick documentation a bit
  Input: docs - remove disclaimer/GPL notice
  Input: fix "Game console" heading level in joystick documentation
  Input: rotary-encoder - remove references to platform data from docs
  Input: move documentation for Amiga CD32
  ...

19 files changed, 569 insertions, 510 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 52458cfdf017..cf26ca49ae6d 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -73,6 +73,7 @@ config TOUCHSCREEN_AD7879
 config TOUCHSCREEN_AD7879_I2C
 	tristate "support I2C bus connection"
 	depends on TOUCHSCREEN_AD7879 && I2C
+	select REGMAP_I2C
 	help
 	  Say Y here if you have AD7879-1/AD7889-1 hooked to an I2C bus.
 
@@ -82,6 +83,7 @@ config TOUCHSCREEN_AD7879_I2C
 config TOUCHSCREEN_AD7879_SPI
 	tristate "support SPI bus connection"
 	depends on TOUCHSCREEN_AD7879 && SPI_MASTER
+	select REGMAP_SPI
 	help
 	  Say Y here if you have AD7879-1/AD7889-1 hooked to a SPI bus.
 
@@ -91,11 +93,11 @@ config TOUCHSCREEN_AD7879_SPI
 	  module will be called ad7879-spi.
 
 config TOUCHSCREEN_AR1021_I2C
-	tristate "Microchip AR1021 i2c touchscreen"
+	tristate "Microchip AR1020/1021 i2c touchscreen"
 	depends on I2C && OF
 	help
-	  Say Y here if you have the Microchip AR1021 touchscreen controller
-	  chip in your system.
+	  Say Y here if you have the Microchip AR1020 or AR1021 touchscreen
+	  controller chip in your system.
 
 	  If unsure, say N.
 
@@ -1033,6 +1035,16 @@ config TOUCHSCREEN_TSC2007
 	  To compile this driver as a module, choose M here: the
 	  module will be called tsc2007.
 
+config TOUCHSCREEN_TSC2007_IIO
+	bool "IIO interface for external ADC input and temperature"
+	depends on TOUCHSCREEN_TSC2007
+	depends on IIO=y || IIO=TOUCHSCREEN_TSC2007
+	help
+	  Saying Y here adds an iio interface to the tsc2007 which
+	  provides values for the AUX input (used for e.g. battery
+	  or ambient light monitoring), temperature and raw input
+	  values.
+
 config TOUCHSCREEN_W90X900
 	tristate "W90P910 touchscreen driver"
 	depends on ARCH_W90X900
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 96761ce2ee6d..18e476948e44 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -80,6 +80,8 @@ obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO)	+= tsc40.o
 obj-$(CONFIG_TOUCHSCREEN_TSC200X_CORE)	+= tsc200x-core.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2004)	+= tsc2004.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2005)	+= tsc2005.o
+tsc2007-y := tsc2007_core.o
+tsc2007-$(CONFIG_TOUCHSCREEN_TSC2007_IIO)	+= tsc2007_iio.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2007)	+= tsc2007.o
 obj-$(CONFIG_TOUCHSCREEN_UCB1400)	+= ucb1400_ts.o
 obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001)	+= wacom_w8001.o
diff --git a/drivers/input/touchscreen/ad7879-i2c.c b/drivers/input/touchscreen/ad7879-i2c.c
index 58f72e0246ab..49b902b10c5f 100644
--- a/drivers/input/touchscreen/ad7879-i2c.c
+++ b/drivers/input/touchscreen/ad7879-i2c.c
@@ -12,53 +12,22 @@
 #include <linux/types.h>
 #include <linux/of.h>
 #include <linux/pm.h>
+#include <linux/regmap.h>
 
 #include "ad7879.h"
 
 #define AD7879_DEVID		0x79	/* AD7879-1/AD7889-1 */
 
-/* All registers are word-sized.
- * AD7879 uses a high-byte first convention.
- */
-static int ad7879_i2c_read(struct device *dev, u8 reg)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-
-	return i2c_smbus_read_word_swapped(client, reg);
-}
-
-static int ad7879_i2c_multi_read(struct device *dev,
-				 u8 first_reg, u8 count, u16 *buf)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	u8 idx;
-
-	i2c_smbus_read_i2c_block_data(client, first_reg, count * 2, (u8 *)buf);
-
-	for (idx = 0; idx < count; ++idx)
-		buf[idx] = swab16(buf[idx]);
-
-	return 0;
-}
-
-static int ad7879_i2c_write(struct device *dev, u8 reg, u16 val)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-
-	return i2c_smbus_write_word_swapped(client, reg, val);
-}
-
-static const struct ad7879_bus_ops ad7879_i2c_bus_ops = {
-	.bustype	= BUS_I2C,
-	.read		= ad7879_i2c_read,
-	.multi_read	= ad7879_i2c_multi_read,
-	.write		= ad7879_i2c_write,
+static const struct regmap_config ad7879_i2c_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.max_register = 15,
 };
 
 static int ad7879_i2c_probe(struct i2c_client *client,
 				      const struct i2c_device_id *id)
 {
-	struct ad7879 *ts;
+	struct regmap *regmap;
 
 	if (!i2c_check_functionality(client->adapter,
 				     I2C_FUNC_SMBUS_WORD_DATA)) {
@@ -66,23 +35,12 @@ static int ad7879_i2c_probe(struct i2c_client *client,
 		return -EIO;
 	}
 
-	ts = ad7879_probe(&client->dev, AD7879_DEVID, client->irq,
-			  &ad7879_i2c_bus_ops);
-	if (IS_ERR(ts))
-		return PTR_ERR(ts);
-
-	i2c_set_clientdata(client, ts);
-
-	return 0;
-}
-
-static int ad7879_i2c_remove(struct i2c_client *client)
-{
-	struct ad7879 *ts = i2c_get_clientdata(client);
-
-	ad7879_remove(ts);
+	regmap = devm_regmap_init_i2c(client, &ad7879_i2c_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
 
-	return 0;
+	return ad7879_probe(&client->dev, regmap, client->irq,
+			    BUS_I2C, AD7879_DEVID);
 }
 
 static const struct i2c_device_id ad7879_id[] = {
@@ -107,12 +65,11 @@ static struct i2c_driver ad7879_i2c_driver = {
 		.of_match_table = of_match_ptr(ad7879_i2c_dt_ids),
 	},
 	.probe		= ad7879_i2c_probe,
-	.remove		= ad7879_i2c_remove,
 	.id_table	= ad7879_id,
 };
 
 module_i2c_driver(ad7879_i2c_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/ad7879-spi.c b/drivers/input/touchscreen/ad7879-spi.c
index d42b6b9af191..3457a5626d75 100644
--- a/drivers/input/touchscreen/ad7879-spi.c
+++ b/drivers/input/touchscreen/ad7879-spi.c
@@ -11,110 +11,28 @@
 #include <linux/spi/spi.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/regmap.h>
 
 #include "ad7879.h"
 
 #define AD7879_DEVID		0x7A	/* AD7879/AD7889 */
 
 #define MAX_SPI_FREQ_HZ      5000000
-#define AD7879_CMD_MAGIC     0xE000
-#define AD7879_CMD_READ      (1 << 10)
-#define AD7879_CMD(reg)      (AD7879_CMD_MAGIC | ((reg) & 0xF))
-#define AD7879_WRITECMD(reg) (AD7879_CMD(reg))
-#define AD7879_READCMD(reg)  (AD7879_CMD(reg) | AD7879_CMD_READ)
 
-/*
- * ad7879_read/write are only used for initial setup and for sysfs controls.
- * The main traffic is done in ad7879_collect().
- */
-
-static int ad7879_spi_xfer(struct spi_device *spi,
-			   u16 cmd, u8 count, u16 *tx_buf, u16 *rx_buf)
-{
-	struct spi_message msg;
-	struct spi_transfer *xfers;
-	void *spi_data;
-	u16 *command;
-	u16 *_rx_buf = _rx_buf; /* shut gcc up */
-	u8 idx;
-	int ret;
-
-	xfers = spi_data = kzalloc(sizeof(*xfers) * (count + 2), GFP_KERNEL);
-	if (!spi_data)
-		return -ENOMEM;
-
-	spi_message_init(&msg);
-
-	command = spi_data;
-	command[0] = cmd;
-	if (count == 1) {
-		/* ad7879_spi_{read,write} gave us buf on stack */
-		command[1] = *tx_buf;
-		tx_buf = &command[1];
-		_rx_buf = rx_buf;
-		rx_buf = &command[2];
-	}
-
-	++xfers;
-	xfers[0].tx_buf = command;
-	xfers[0].len = 2;
-	spi_message_add_tail(&xfers[0], &msg);
-	++xfers;
-
-	for (idx = 0; idx < count; ++idx) {
-		if (rx_buf)
-			xfers[idx].rx_buf = &rx_buf[idx];
-		if (tx_buf)
-			xfers[idx].tx_buf = &tx_buf[idx];
-		xfers[idx].len = 2;
-		spi_message_add_tail(&xfers[idx], &msg);
-	}
-
-	ret = spi_sync(spi, &msg);
-
-	if (count == 1)
-		_rx_buf[0] = command[2];
-
-	kfree(spi_data);
-
-	return ret;
-}
-
-static int ad7879_spi_multi_read(struct device *dev,
-				 u8 first_reg, u8 count, u16 *buf)
-{
-	struct spi_device *spi = to_spi_device(dev);
+#define AD7879_CMD_MAGIC     0xE0
+#define AD7879_CMD_READ      BIT(2)
 
-	return ad7879_spi_xfer(spi, AD7879_READCMD(first_reg), count, NULL, buf);
-}
-
-static int ad7879_spi_read(struct device *dev, u8 reg)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	u16 ret, dummy;
-
-	return ad7879_spi_xfer(spi, AD7879_READCMD(reg), 1, &dummy, &ret) ? : ret;
-}
-
-static int ad7879_spi_write(struct device *dev, u8 reg, u16 val)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	u16 dummy;
-
-	return ad7879_spi_xfer(spi, AD7879_WRITECMD(reg), 1, &val, &dummy);
-}
-
-static const struct ad7879_bus_ops ad7879_spi_bus_ops = {
-	.bustype	= BUS_SPI,
-	.read		= ad7879_spi_read,
-	.multi_read	= ad7879_spi_multi_read,
-	.write		= ad7879_spi_write,
+static const struct regmap_config ad7879_spi_regmap_config = {
+	.reg_bits = 16,
+	.val_bits = 16,
+	.max_register = 15,
+	.read_flag_mask = AD7879_CMD_MAGIC | AD7879_CMD_READ,
+	.write_flag_mask = AD7879_CMD_MAGIC,
 };
 
 static int ad7879_spi_probe(struct spi_device *spi)
 {
-	struct ad7879 *ts;
-	int err;
+	struct regmap *regmap;
 
 	/* don't exceed max specified SPI CLK frequency */
 	if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {
@@ -122,29 +40,11 @@ static int ad7879_spi_probe(struct spi_device *spi)
 		return -EINVAL;
 	}
 
-	spi->bits_per_word = 16;
-	err = spi_setup(spi);
-	if (err) {
-	        dev_dbg(&spi->dev, "spi master doesn't support 16 bits/word\n");
-	        return err;
-	}
-
-	ts = ad7879_probe(&spi->dev, AD7879_DEVID, spi->irq, &ad7879_spi_bus_ops);
-	if (IS_ERR(ts))
-		return PTR_ERR(ts);
-
-	spi_set_drvdata(spi, ts);
-
-	return 0;
-}
-
-static int ad7879_spi_remove(struct spi_device *spi)
-{
-	struct ad7879 *ts = spi_get_drvdata(spi);
-
-	ad7879_remove(ts);
+	regmap = devm_regmap_init_spi(spi, &ad7879_spi_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
 
-	return 0;
+	return ad7879_probe(&spi->dev, regmap, spi->irq, BUS_SPI, AD7879_DEVID);
 }
 
 #ifdef CONFIG_OF
@@ -162,12 +62,11 @@ static struct spi_driver ad7879_spi_driver = {
 		.of_match_table = of_match_ptr(ad7879_spi_dt_ids),
 	},
 	.probe		= ad7879_spi_probe,
-	.remove		= ad7879_spi_remove,
 };
 
 module_spi_driver(ad7879_spi_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("AD7879(-1) touchscreen SPI bus driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("spi:ad7879");
diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c
index e16a44667da7..196028c45210 100644
--- a/drivers/input/touchscreen/ad7879.c
+++ b/drivers/input/touchscreen/ad7879.c
@@ -26,9 +26,9 @@
 #include <linux/input.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
 #include <linux/slab.h>
-#include <linux/spi/spi.h>
-#include <linux/i2c.h>
 #include <linux/gpio.h>
 
 #include <linux/input/touchscreen.h>
@@ -106,8 +106,7 @@ enum {
 #define	TS_PEN_UP_TIMEOUT		msecs_to_jiffies(50)
 
 struct ad7879 {
-	const struct ad7879_bus_ops *bops;
-
+	struct regmap		*regmap;
 	struct device		*dev;
 	struct input_dev	*input;
 	struct timer_list	timer;
@@ -137,17 +136,32 @@ struct ad7879 {
 
 static int ad7879_read(struct ad7879 *ts, u8 reg)
 {
-	return ts->bops->read(ts->dev, reg);
-}
+	unsigned int val;
+	int error;
 
-static int ad7879_multi_read(struct ad7879 *ts, u8 first_reg, u8 count, u16 *buf)
-{
-	return ts->bops->multi_read(ts->dev, first_reg, count, buf);
+	error = regmap_read(ts->regmap, reg, &val);
+	if (error) {
+		dev_err(ts->dev, "failed to read register %#02x: %d\n",
+			reg, error);
+		return error;
+	}
+
+	return val;
 }
 
 static int ad7879_write(struct ad7879 *ts, u8 reg, u16 val)
 {
-	return ts->bops->write(ts->dev, reg, val);
+	int error;
+
+	error = regmap_write(ts->regmap, reg, val);
+	if (error) {
+		dev_err(ts->dev,
+			"failed to write %#04x to register %#02x: %d\n",
+			val, reg, error);
+		return error;
+	}
+
+	return 0;
 }
 
 static int ad7879_report(struct ad7879 *ts)
@@ -234,7 +248,8 @@ static irqreturn_t ad7879_irq(int irq, void *handle)
 {
 	struct ad7879 *ts = handle;
 
-	ad7879_multi_read(ts, AD7879_REG_XPLUS, AD7879_NR_SENSE, ts->conversion_data);
+	regmap_bulk_read(ts->regmap, AD7879_REG_XPLUS,
+			 ts->conversion_data, AD7879_NR_SENSE);
 
 	if (!ad7879_report(ts))
 		mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT);
@@ -440,23 +455,34 @@ static void ad7879_gpio_set_value(struct gpio_chip *chip,
 static int ad7879_gpio_add(struct ad7879 *ts,
 			   const struct ad7879_platform_data *pdata)
 {
+	bool gpio_export;
+	int gpio_base;
 	int ret = 0;
 
+	if (pdata) {
+		gpio_export = pdata->gpio_export;
+		gpio_base = pdata->gpio_base;
+	} else {
+		gpio_export = device_property_read_bool(ts->dev,
+							"gpio-controller");
+		gpio_base = -1;
+	}
+
 	mutex_init(&ts->mutex);
 
-	if (pdata->gpio_export) {
+	if (gpio_export) {
 		ts->gc.direction_input = ad7879_gpio_direction_input;
 		ts->gc.direction_output = ad7879_gpio_direction_output;
 		ts->gc.get = ad7879_gpio_get_value;
 		ts->gc.set = ad7879_gpio_set_value;
 		ts->gc.can_sleep = 1;
-		ts->gc.base = pdata->gpio_base;
+		ts->gc.base = gpio_base;
 		ts->gc.ngpio = 1;
 		ts->gc.label = "AD7879-GPIO";
 		ts->gc.owner = THIS_MODULE;
 		ts->gc.parent = ts->dev;
 
-		ret = gpiochip_add_data(&ts->gc, ts);
+		ret = devm_gpiochip_add_data(ts->dev, &ts->gc, ts);
 		if (ret)
 			dev_err(ts->dev, "failed to register gpio %d\n",
 				ts->gc.base);
@@ -464,25 +490,12 @@ static int ad7879_gpio_add(struct ad7879 *ts,
 
 	return ret;
 }
-
-static void ad7879_gpio_remove(struct ad7879 *ts)
-{
-	const struct ad7879_platform_data *pdata = dev_get_platdata(ts->dev);
-
-	if (pdata && pdata->gpio_export)
-		gpiochip_remove(&ts->gc);
-
-}
 #else
-static inline int ad7879_gpio_add(struct ad7879 *ts,
-				  const struct ad7879_platform_data *pdata)
+static int ad7879_gpio_add(struct ad7879 *ts,
+			   const struct ad7879_platform_data *pdata)
 {
 	return 0;
 }
-
-static inline void ad7879_gpio_remove(struct ad7879 *ts)
-{
-}
 #endif
 
 static int ad7879_parse_dt(struct device *dev, struct ad7879 *ts)
@@ -511,8 +524,15 @@ static int ad7879_parse_dt(struct device *dev, struct ad7879 *ts)
 	return 0;
 }
 
-struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
-			    const struct ad7879_bus_ops *bops)
+static void ad7879_cleanup_sysfs(void *_ts)
+{
+	struct ad7879 *ts = _ts;
+
+	sysfs_remove_group(&ts->dev->kobj, &ad7879_attr_group);
+}
+
+int ad7879_probe(struct device *dev, struct regmap *regmap,
+		 int irq, u16 bustype, u8 devid)
 {
 	struct ad7879_platform_data *pdata = dev_get_platdata(dev);
 	struct ad7879 *ts;
@@ -520,14 +540,14 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
 	int err;
 	u16 revid;
 
-	if (!irq) {
+	if (irq <= 0) {
 		dev_err(dev, "No IRQ specified\n");
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 	}
 
 	ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
 	if (!ts)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 
 	if (pdata) {
 		/* Platform data use swapped axis (backward compatibility) */
@@ -540,23 +560,22 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
 		ts->averaging = pdata->averaging;
 		ts->pen_down_acc_interval = pdata->pen_down_acc_interval;
 		ts->median = pdata->median;
-	} else if (dev->of_node) {
-		ad7879_parse_dt(dev, ts);
 	} else {
-		dev_err(dev, "No platform data\n");
-		return ERR_PTR(-EINVAL);
+		err = ad7879_parse_dt(dev, ts);
+		if (err)
+			return err;
 	}
 
 	input_dev = devm_input_allocate_device(dev);
 	if (!input_dev) {
 		dev_err(dev, "Failed to allocate input device\n");
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 	}
 
-	ts->bops = bops;
 	ts->dev = dev;
 	ts->input = input_dev;
 	ts->irq = irq;
+	ts->regmap = regmap;
 
 	setup_timer(&ts->timer, ad7879_timer, (unsigned long) ts);
 	snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));
@@ -564,20 +583,14 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
 	input_dev->name = "AD7879 Touchscreen";
 	input_dev->phys = ts->phys;
 	input_dev->dev.parent = dev;
-	input_dev->id.bustype = bops->bustype;
+	input_dev->id.bustype = bustype;
 
 	input_dev->open = ad7879_open;
 	input_dev->close = ad7879_close;
 
 	input_set_drvdata(input_dev, ts);
 
-	__set_bit(EV_ABS, input_dev->evbit);
-	__set_bit(ABS_X, input_dev->absbit);
-	__set_bit(ABS_Y, input_dev->absbit);
-	__set_bit(ABS_PRESSURE, input_dev->absbit);
-
-	__set_bit(EV_KEY, input_dev->evbit);
-	__set_bit(BTN_TOUCH, input_dev->keybit);
+	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
 
 	if (pdata) {
 		input_set_abs_params(input_dev, ABS_X,
@@ -595,17 +608,18 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
 	} else {
 		input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, 0, 0);
 		input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, 0, 0);
+		input_set_capability(input_dev, EV_ABS, ABS_PRESSURE);
 		touchscreen_parse_properties(input_dev, false, NULL);
 		if (!input_abs_get_max(input_dev, ABS_PRESSURE)) {
 			dev_err(dev, "Touchscreen pressure is not specified\n");
-			return ERR_PTR(-EINVAL);
+			return -EINVAL;
 		}
 	}
 
 	err = ad7879_write(ts, AD7879_REG_CTRL2, AD7879_RESET);
 	if (err < 0) {
 		dev_err(dev, "Failed to write %s\n", input_dev->name);
-		return ERR_PTR(err);
+		return err;
 	}
 
 	revid = ad7879_read(ts, AD7879_REG_REVID);
@@ -614,7 +628,7 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
 	if (input_dev->id.product != devid) {
 		dev_err(dev, "Failed to probe %s (%x vs %x)\n",
 			input_dev->name, devid, revid);
-		return ERR_PTR(-ENODEV);
+		return -ENODEV;
 	}
 
 	ts->cmd_crtl3 = AD7879_YPLUS_BIT |
@@ -639,43 +653,33 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
 					dev_name(dev), ts);
 	if (err) {
 		dev_err(dev, "Failed to request IRQ: %d\n", err);
-		return ERR_PTR(err);
+		return err;
 	}
 
 	__ad7879_disable(ts);
 
 	err = sysfs_create_group(&dev->kobj, &ad7879_attr_group);
 	if (err)
-		goto err_out;
+		return err;
 
-	if (pdata) {
-		err = ad7879_gpio_add(ts, pdata);
-		if (err)
-			goto err_remove_attr;
-	}
+	err = devm_add_action_or_reset(dev, ad7879_cleanup_sysfs, ts);
+	if (err)
+		return err;
+
+	err = ad7879_gpio_add(ts, pdata);
+	if (err)
+		return err;
 
 	err = input_register_device(input_dev);
 	if (err)
-		goto err_remove_gpio;
+		return err;
 
-	return ts;
+	dev_set_drvdata(dev, ts);
 
-err_remove_gpio:
-	ad7879_gpio_remove(ts);
-err_remove_attr:
-	sysfs_remove_group(&dev->kobj, &ad7879_attr_group);
-err_out:
-	return ERR_PTR(err);
+	return 0;
 }
 EXPORT_SYMBOL(ad7879_probe);
 
-void ad7879_remove(struct ad7879 *ts)
-{
-	ad7879_gpio_remove(ts);
-	sysfs_remove_group(&ts->dev->kobj, &ad7879_attr_group);
-}
-EXPORT_SYMBOL(ad7879_remove);
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("AD7879(-1) touchscreen Driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/ad7879.h b/drivers/input/touchscreen/ad7879.h
index 6fd13c48d373..7e43066a4b68 100644
--- a/drivers/input/touchscreen/ad7879.h
+++ b/drivers/input/touchscreen/ad7879.h
@@ -11,20 +11,12 @@
 
 #include <linux/types.h>
 
-struct ad7879;
 struct device;
-
-struct ad7879_bus_ops {
-	u16 bustype;
-	int (*read)(struct device *dev, u8 reg);
-	int (*multi_read)(struct device *dev, u8 first_reg, u8 count, u16 *buf);
-	int (*write)(struct device *dev, u8 reg, u16 val);
-};
+struct regmap;
 
 extern const struct dev_pm_ops ad7879_pm_ops;
 
-struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned irq,
-			    const struct ad7879_bus_ops *bops);
-void ad7879_remove(struct ad7879 *);
+int ad7879_probe(struct device *dev, struct regmap *regmap,
+		 int irq, u16 bustype, u8 devid);
 
 #endif
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index f5793e3d945f..735a0be1ad95 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -871,7 +871,7 @@ static irqreturn_t ads7846_irq(int irq, void *handle)
 				   msecs_to_jiffies(TS_POLL_PERIOD));
 	}
 
-	if (ts->pendown) {
+	if (ts->pendown && !ts->stopped) {
 		struct input_dev *input = ts->input;
 
 		input_report_key(input, BTN_TOUCH, 0);
diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c
index 6562b17117f7..f9dcbd63e598 100644
--- a/drivers/input/touchscreen/ar1021_i2c.c
+++ b/drivers/input/touchscreen/ar1021_i2c.c
@@ -1,11 +1,12 @@
 /*
- * Microchip AR1021 driver for I2C
+ * Microchip AR1020 and AR1021 driver for I2C
  *
  * Author: Christian Gmeiner <christian.gmeiner@gmail.com>
  *
  * License: GPLv2 as published by the FSF.
  */
 
+#include <linux/bitops.h>
 #include <linux/module.h>
 #include <linux/input.h>
 #include <linux/of.h>
@@ -18,6 +19,10 @@
 #define AR1021_MAX_X	4095
 #define AR1021_MAX_Y	4095
 
+#define AR1021_CMD	0x55
+
+#define AR1021_CMD_ENABLE_TOUCH		0x12
+
 struct ar1021_i2c {
 	struct i2c_client *client;
 	struct input_dev *input;
@@ -33,12 +38,12 @@ static irqreturn_t ar1021_i2c_irq(int irq, void *dev_id)
 	int retval;
 
 	retval = i2c_master_recv(ar1021->client,
-				ar1021->data, sizeof(ar1021->data));
+				 ar1021->data, sizeof(ar1021->data));
 	if (retval != sizeof(ar1021->data))
 		goto out;
 
 	/* sync bit set ? */
-	if ((data[0] & 0x80) == 0)
+	if (!(data[0] & BIT(7)))
 		goto out;
 
 	button = data[0] & BIT(0);
@@ -56,8 +61,19 @@ out:
 
 static int ar1021_i2c_open(struct input_dev *dev)
 {
+	static const u8 cmd_enable_touch[] = {
+		AR1021_CMD,
+		0x01, /* number of bytes after this */
+		AR1021_CMD_ENABLE_TOUCH
+	};
 	struct ar1021_i2c *ar1021 = input_get_drvdata(dev);
 	struct i2c_client *client = ar1021->client;
+	int error;
+
+	error = i2c_master_send(ar1021->client, cmd_enable_touch,
+				sizeof(cmd_enable_touch));
+	if (error < 0)
+		return error;
 
 	enable_irq(client->irq);
 
@@ -73,7 +89,7 @@ static void ar1021_i2c_close(struct input_dev *dev)
 }
 
 static int ar1021_i2c_probe(struct i2c_client *client,
-				     const struct i2c_device_id *id)
+			    const struct i2c_device_id *id)
 {
 	struct ar1021_i2c *ar1021;
 	struct input_dev *input;
@@ -109,7 +125,7 @@ static int ar1021_i2c_probe(struct i2c_client *client,
 
 	error = devm_request_threaded_irq(&client->dev, client->irq,
 					  NULL, ar1021_i2c_irq,
-					  IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					  IRQF_ONESHOT,
 					  "ar1021_i2c", ar1021);
 	if (error) {
 		dev_err(&client->dev,
@@ -151,7 +167,7 @@ static int __maybe_unused ar1021_i2c_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(ar1021_i2c_pm, ar1021_i2c_suspend, ar1021_i2c_resume);
 
 static const struct i2c_device_id ar1021_i2c_id[] = {
-	{ "MICROCHIP_AR1021_I2C", 0 },
+	{ "ar1021", 0 },
 	{ },
 };
 MODULE_DEVICE_TABLE(i2c, ar1021_i2c_id);
@@ -175,5 +191,5 @@ static struct i2c_driver ar1021_i2c_driver = {
 module_i2c_driver(ar1021_i2c_driver);
 
 MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@gmail.com>");
-MODULE_DESCRIPTION("Microchip AR1021 I2C Driver");
+MODULE_DESCRIPTION("Microchip AR1020 and AR1021 I2C Driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/eeti_ts.c b/drivers/input/touchscreen/eeti_ts.c
index 16023867b9da..2facad75eb6d 100644
--- a/drivers/input/touchscreen/eeti_ts.c
+++ b/drivers/input/touchscreen/eeti_ts.c
@@ -31,9 +31,9 @@
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
 #include <linux/timer.h>
-#include <linux/gpio.h>
-#include <linux/input/eeti_ts.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
+#include <asm/unaligned.h>
 
 static bool flip_x;
 module_param(flip_x, bool, 0644);
@@ -43,54 +43,31 @@ static bool flip_y;
 module_param(flip_y, bool, 0644);
 MODULE_PARM_DESC(flip_y, "flip y coordinate");
 
-struct eeti_ts_priv {
+struct eeti_ts {
 	struct i2c_client *client;
 	struct input_dev *input;
-	struct work_struct work;
-	struct mutex mutex;
-	int irq_gpio, irq, irq_active_high;
+	struct gpio_desc *attn_gpio;
+	bool running;
 };
 
 #define EETI_TS_BITDEPTH	(11)
 #define EETI_MAXVAL		((1 << (EETI_TS_BITDEPTH + 1)) - 1)
 
-#define REPORT_BIT_PRESSED	(1 << 0)
-#define REPORT_BIT_AD0		(1 << 1)
-#define REPORT_BIT_AD1		(1 << 2)
-#define REPORT_BIT_HAS_PRESSURE	(1 << 6)
+#define REPORT_BIT_PRESSED	BIT(0)
+#define REPORT_BIT_AD0		BIT(1)
+#define REPORT_BIT_AD1		BIT(2)
+#define REPORT_BIT_HAS_PRESSURE	BIT(6)
 #define REPORT_RES_BITS(v)	(((v) >> 1) + EETI_TS_BITDEPTH)
 
-static inline int eeti_ts_irq_active(struct eeti_ts_priv *priv)
+static void eeti_ts_report_event(struct eeti_ts *eeti, u8 *buf)
 {
-	return gpio_get_value(priv->irq_gpio) == priv->irq_active_high;
-}
-
-static void eeti_ts_read(struct work_struct *work)
-{
-	char buf[6];
-	unsigned int x, y, res, pressed, to = 100;
-	struct eeti_ts_priv *priv =
-		container_of(work, struct eeti_ts_priv, work);
+	unsigned int res;
+	u16 x, y;
 
-	mutex_lock(&priv->mutex);
-
-	while (eeti_ts_irq_active(priv) && --to)
-		i2c_master_recv(priv->client, buf, sizeof(buf));
-
-	if (!to) {
-		dev_err(&priv->client->dev,
-			"unable to clear IRQ - line stuck?\n");
-		goto out;
-	}
-
-	/* drop non-report packets */
-	if (!(buf[0] & 0x80))
-		goto out;
-
-	pressed = buf[0] & REPORT_BIT_PRESSED;
 	res = REPORT_RES_BITS(buf[0] & (REPORT_BIT_AD0 | REPORT_BIT_AD1));
-	x = buf[2] | (buf[1] << 8);
-	y = buf[4] | (buf[3] << 8);
+
+	x = get_unaligned_be16(&buf[1]);
+	y = get_unaligned_be16(&buf[3]);
 
 	/* fix the range to 11 bits */
 	x >>= res - EETI_TS_BITDEPTH;
@@ -103,65 +80,78 @@ static void eeti_ts_read(struct work_struct *work)
 		y = EETI_MAXVAL - y;
 
 	if (buf[0] & REPORT_BIT_HAS_PRESSURE)
-		input_report_abs(priv->input, ABS_PRESSURE, buf[5]);
+		input_report_abs(eeti->input, ABS_PRESSURE, buf[5]);
 
-	input_report_abs(priv->input, ABS_X, x);
-	input_report_abs(priv->input, ABS_Y, y);
-	input_report_key(priv->input, BTN_TOUCH, !!pressed);
-	input_sync(priv->input);
-
-out:
-	mutex_unlock(&priv->mutex);
+	input_report_abs(eeti->input, ABS_X, x);
+	input_report_abs(eeti->input, ABS_Y, y);
+	input_report_key(eeti->input, BTN_TOUCH, buf[0] & REPORT_BIT_PRESSED);
+	input_sync(eeti->input);
 }
 
 static irqreturn_t eeti_ts_isr(int irq, void *dev_id)
 {
-	struct eeti_ts_priv *priv = dev_id;
+	struct eeti_ts *eeti = dev_id;
+	int len;
+	int error;
+	char buf[6];
 
-	 /* postpone I2C transactions as we are atomic */
-	schedule_work(&priv->work);
+	do {
+		len = i2c_master_recv(eeti->client, buf, sizeof(buf));
+		if (len != sizeof(buf)) {
+			error = len < 0 ? len : -EIO;
+			dev_err(&eeti->client->dev,
+				"failed to read touchscreen data: %d\n",
+				error);
+			break;
+		}
+
+		if (buf[0] & 0x80) {
+			/* Motion packet */
+			eeti_ts_report_event(eeti, buf);
+		}
+	} while (eeti->running &&
+		 eeti->attn_gpio && gpiod_get_value_cansleep(eeti->attn_gpio));
 
 	return IRQ_HANDLED;
 }
 
-static void eeti_ts_start(struct eeti_ts_priv *priv)
+static void eeti_ts_start(struct eeti_ts *eeti)
 {
-	enable_irq(priv->irq);
-
-	/* Read the events once to arm the IRQ */
-	eeti_ts_read(&priv->work);
+	eeti->running = true;
+	wmb();
+	enable_irq(eeti->client->irq);
 }
 
-static void eeti_ts_stop(struct eeti_ts_priv *priv)
+static void eeti_ts_stop(struct eeti_ts *eeti)
 {
-	disable_irq(priv->irq);
-	cancel_work_sync(&priv->work);
+	eeti->running = false;
+	wmb();
+	disable_irq(eeti->client->irq);
 }
 
 static int eeti_ts_open(struct input_dev *dev)
 {
-	struct eeti_ts_priv *priv = input_get_drvdata(dev);
+	struct eeti_ts *eeti = input_get_drvdata(dev);
 
-	eeti_ts_start(priv);
+	eeti_ts_start(eeti);
 
 	return 0;
 }
 
 static void eeti_ts_close(struct input_dev *dev)
 {
-	struct eeti_ts_priv *priv = input_get_drvdata(dev);
+	struct eeti_ts *eeti = input_get_drvdata(dev);
 
-	eeti_ts_stop(priv);
+	eeti_ts_stop(eeti);
 }
 
 static int eeti_ts_probe(struct i2c_client *client,
-				   const struct i2c_device_id *idp)
+			 const struct i2c_device_id *idp)
 {
-	struct eeti_ts_platform_data *pdata = dev_get_platdata(&client->dev);
-	struct eeti_ts_priv *priv;
+	struct device *dev = &client->dev;
+	struct eeti_ts *eeti;
 	struct input_dev *input;
-	unsigned int irq_flags;
-	int err = -ENOMEM;
+	int error;
 
 	/*
 	 * In contrast to what's described in the datasheet, there seems
@@ -170,21 +160,19 @@ static int eeti_ts_probe(struct i2c_client *client,
 	 * for interrupts to occur.
 	 */
 
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (!priv) {
-		dev_err(&client->dev, "failed to allocate driver data\n");
+	eeti = devm_kzalloc(dev, sizeof(*eeti), GFP_KERNEL);
+	if (!eeti) {
+		dev_err(dev, "failed to allocate driver data\n");
 		return -ENOMEM;
 	}
 
-	mutex_init(&priv->mutex);
-	input = input_allocate_device();
+	input = devm_input_allocate_device(dev);
 	if (!input) {
-		dev_err(&client->dev, "Failed to allocate input device.\n");
-		goto err1;
+		dev_err(dev, "Failed to allocate input device.\n");
+		return -ENOMEM;
 	}
 
-	input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
-	input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+	input_set_capability(input, EV_KEY, BTN_TOUCH);
 
 	input_set_abs_params(input, ABS_X, 0, EETI_MAXVAL, 0, 0);
 	input_set_abs_params(input, ABS_Y, 0, EETI_MAXVAL, 0, 0);
@@ -192,71 +180,38 @@ static int eeti_ts_probe(struct i2c_client *client,
 
 	input->name = client->name;
 	input->id.bustype = BUS_I2C;
-	input->dev.parent = &client->dev;
 	input->open = eeti_ts_open;
 	input->close = eeti_ts_close;
 
-	priv->client = client;
-	priv->input = input;
-	priv->irq_gpio = pdata->irq_gpio;
-	priv->irq = gpio_to_irq(pdata->irq_gpio);
-
-	err = gpio_request_one(pdata->irq_gpio, GPIOF_IN, client->name);
-	if (err < 0)
-		goto err1;
-
-	priv->irq_active_high = pdata->irq_active_high;
-
-	irq_flags = priv->irq_active_high ?
-		IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING;
+	eeti->client = client;
+	eeti->input = input;
 
-	INIT_WORK(&priv->work, eeti_ts_read);
-	i2c_set_clientdata(client, priv);
-	input_set_drvdata(input, priv);
+	eeti->attn_gpio = devm_gpiod_get_optional(dev, "attn", GPIOD_IN);
+	if (IS_ERR(eeti->attn_gpio))
+		return PTR_ERR(eeti->attn_gpio);
 
-	err = input_register_device(input);
-	if (err)
-		goto err2;
+	i2c_set_clientdata(client, eeti);
+	input_set_drvdata(input, eeti);
 
-	err = request_irq(priv->irq, eeti_ts_isr, irq_flags,
-			  client->name, priv);
-	if (err) {
-		dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
-		goto err3;
+	error = devm_request_threaded_irq(dev, client->irq,
+					  NULL, eeti_ts_isr,
+					  IRQF_ONESHOT,
+					  client->name, eeti);
+	if (error) {
+		dev_err(dev, "Unable to request touchscreen IRQ: %d\n",
+			error);
+		return error;
 	}
 
 	/*
 	 * Disable the device for now. It will be enabled once the
 	 * input device is opened.
 	 */
-	eeti_ts_stop(priv);
-
-	return 0;
-
-err3:
-	input_unregister_device(input);
-	input = NULL; /* so we dont try to free it below */
-err2:
-	gpio_free(pdata->irq_gpio);
-err1:
-	input_free_device(input);
-	kfree(priv);
-	return err;
-}
-
-static int eeti_ts_remove(struct i2c_client *client)
-{
-	struct eeti_ts_priv *priv = i2c_get_clientdata(client);
-
-	free_irq(priv->irq, priv);
-	/*
-	 * eeti_ts_stop() leaves IRQ disabled. We need to re-enable it
-	 * so that device still works if we reload the driver.
-	 */
-	enable_irq(priv->irq);
+	eeti_ts_stop(eeti);
 
-	input_unregister_device(priv->input);
-	kfree(priv);
+	error = input_register_device(input);
+	if (error)
+		return error;
 
 	return 0;
 }
@@ -264,18 +219,18 @@ static int eeti_ts_remove(struct i2c_client *client)
 static int __maybe_unused eeti_ts_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
-	struct eeti_ts_priv *priv = i2c_get_clientdata(client);
-	struct input_dev *input_dev = priv->input;
+	struct eeti_ts *eeti = i2c_get_clientdata(client);
+	struct input_dev *input_dev = eeti->input;
 
 	mutex_lock(&input_dev->mutex);
 
 	if (input_dev->users)
-		eeti_ts_stop(priv);
+		eeti_ts_stop(eeti);
 
 	mutex_unlock(&input_dev->mutex);
 
 	if (device_may_wakeup(&client->dev))
-		enable_irq_wake(priv->irq);
+		enable_irq_wake(client->irq);
 
 	return 0;
 }
@@ -283,16 +238,16 @@ static int __maybe_unused eeti_ts_suspend(struct device *dev)
 static int __maybe_unused eeti_ts_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
-	struct eeti_ts_priv *priv = i2c_get_clientdata(client);
-	struct input_dev *input_dev = priv->input;
+	struct eeti_ts *eeti = i2c_get_clientdata(client);
+	struct input_dev *input_dev = eeti->input;
 
 	if (device_may_wakeup(&client->dev))
-		disable_irq_wake(priv->irq);
+		disable_irq_wake(client->irq);
 
 	mutex_lock(&input_dev->mutex);
 
 	if (input_dev->users)
-		eeti_ts_start(priv);
+		eeti_ts_start(eeti);
 
 	mutex_unlock(&input_dev->mutex);
 
@@ -313,7 +268,6 @@ static struct i2c_driver eeti_ts_driver = {
 		.pm = &eeti_ts_pm,
 	},
 	.probe = eeti_ts_probe,
-	.remove = eeti_ts_remove,
 	.id_table = eeti_ts_id,
 };
 
diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c
index 7098e0a47019..ee82a975bfd2 100644
--- a/drivers/input/touchscreen/imx6ul_tsc.c
+++ b/drivers/input/touchscreen/imx6ul_tsc.c
@@ -337,11 +337,20 @@ static int imx6ul_tsc_open(struct input_dev *input_dev)
 		dev_err(tsc->dev,
 			"Could not prepare or enable the tsc clock: %d\n",
 			err);
-		clk_disable_unprepare(tsc->adc_clk);
-		return err;
+		goto disable_adc_clk;
 	}
 
-	return imx6ul_tsc_init(tsc);
+	err = imx6ul_tsc_init(tsc);
+	if (err)
+		goto disable_tsc_clk;
+
+	return 0;
+
+disable_tsc_clk:
+	clk_disable_unprepare(tsc->tsc_clk);
+disable_adc_clk:
+	clk_disable_unprepare(tsc->adc_clk);
+	return err;
 }
 
 static void imx6ul_tsc_close(struct input_dev *input_dev)
diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c
index e0baa7de4102..4eb31ec10b18 100644
--- a/drivers/input/touchscreen/lpc32xx_ts.c
+++ b/drivers/input/touchscreen/lpc32xx_ts.c
@@ -142,11 +142,14 @@ static void lpc32xx_stop_tsc(struct lpc32xx_tsc *tsc)
 	clk_disable_unprepare(tsc->clk);
 }
 
-static void lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)
+static int lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)
 {
 	u32 tmp;
+	int err;
 
-	clk_prepare_enable(tsc->clk);
+	err = clk_prepare_enable(tsc->clk);
+	if (err)
+		return err;
 
 	tmp = tsc_readl(tsc, LPC32XX_TSC_CON) & ~LPC32XX_TSC_ADCCON_POWER_UP;
 
@@ -184,15 +187,15 @@ static void lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)
 
 	/* Enable automatic ts event capture */
 	tsc_writel(tsc, LPC32XX_TSC_CON, tmp | LPC32XX_TSC_ADCCON_AUTO_EN);
+
+	return 0;
 }
 
 static int lpc32xx_ts_open(struct input_dev *dev)
 {
 	struct lpc32xx_tsc *tsc = input_get_drvdata(dev);
 
-	lpc32xx_setup_tsc(tsc);
-
-	return 0;
+	return lpc32xx_setup_tsc(tsc);
 }
 
 static void lpc32xx_ts_close(struct input_dev *dev)
diff --git a/drivers/input/touchscreen/max11801_ts.c b/drivers/input/touchscreen/max11801_ts.c
index a595ae5284e3..72ca3efb5781 100644
--- a/drivers/input/touchscreen/max11801_ts.c
+++ b/drivers/input/touchscreen/max11801_ts.c
@@ -224,9 +224,16 @@ static const struct i2c_device_id max11801_ts_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, max11801_ts_id);
 
+static const struct of_device_id max11801_ts_dt_ids[] = {
+	{ .compatible = "maxim,max11801" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, max11801_ts_dt_ids);
+
 static struct i2c_driver max11801_ts_driver = {
 	.driver = {
 		.name	= "max11801_ts",
+		.of_match_table = max11801_ts_dt_ids,
 	},
 	.id_table	= max11801_ts_id,
 	.probe		= max11801_ts_probe,
diff --git a/drivers/input/touchscreen/melfas_mip4.c b/drivers/input/touchscreen/melfas_mip4.c
index 703d7f983d0a..05108c2fea93 100644
--- a/drivers/input/touchscreen/melfas_mip4.c
+++ b/drivers/input/touchscreen/melfas_mip4.c
@@ -253,10 +253,21 @@ static int mip4_get_fw_version(struct mip4_ts *ts)
  */
 static int mip4_query_device(struct mip4_ts *ts)
 {
+	union i2c_smbus_data dummy;
 	int error;
 	u8 cmd[2];
 	u8 buf[14];
 
+	/*
+	 * Make sure there is something at this address as we do not
+	 * consider subsequent failures as fatal.
+	 */
+	if (i2c_smbus_xfer(ts->client->adapter, ts->client->addr,
+			   0, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
+		dev_err(&ts->client->dev, "nothing at this address\n");
+		return -ENXIO;
+	}
+
 	/* Product name */
 	cmd[0] = MIP4_R0_INFO;
 	cmd[1] = MIP4_R1_INFO_PRODUCT_NAME;
diff --git a/drivers/input/touchscreen/silead.c b/drivers/input/touchscreen/silead.c
index 404830a4a366..813dd68a5c82 100644
--- a/drivers/input/touchscreen/silead.c
+++ b/drivers/input/touchscreen/silead.c
@@ -580,12 +580,25 @@ static const struct acpi_device_id silead_ts_acpi_match[] = {
 MODULE_DEVICE_TABLE(acpi, silead_ts_acpi_match);
 #endif
 
+#ifdef CONFIG_OF
+static const struct of_device_id silead_ts_of_match[] = {
+	{ .compatible = "silead,gsl1680" },
+	{ .compatible = "silead,gsl1688" },
+	{ .compatible = "silead,gsl3670" },
+	{ .compatible = "silead,gsl3675" },
+	{ .compatible = "silead,gsl3692" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, silead_ts_of_match);
+#endif
+
 static struct i2c_driver silead_ts_driver = {
 	.probe = silead_ts_probe,
 	.id_table = silead_ts_id,
 	.driver = {
 		.name = SILEAD_TS_NAME,
 		.acpi_match_table = ACPI_PTR(silead_ts_acpi_match),
+		.of_match_table = of_match_ptr(silead_ts_of_match),
 		.pm = &silead_ts_pm,
 	},
 };
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 4c0eecae065c..128e5bd74720 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -369,7 +369,7 @@ static void sur40_poll(struct input_polled_dev *polldev)
 		 * packet ID will usually increase in the middle of a series
 		 * instead of at the end.
 		 */
-		if (packet_id != header->packet_id)
+		if (packet_id != le32_to_cpu(header->packet_id))
 			dev_dbg(sur40->dev, "packet ID mismatch\n");
 
 		packet_blobs = result / sizeof(struct sur40_blob);
diff --git a/drivers/input/touchscreen/tps6507x-ts.c b/drivers/input/touchscreen/tps6507x-ts.c
index a340bfccdfb6..75170a7439b1 100644
--- a/drivers/input/touchscreen/tps6507x-ts.c
+++ b/drivers/input/touchscreen/tps6507x-ts.c
@@ -226,7 +226,7 @@ static int tps6507x_ts_probe(struct platform_device *pdev)
 	 */
 	init_data = tps_board->tps6507x_ts_init_data;
 
-	tsc = kzalloc(sizeof(struct tps6507x_ts), GFP_KERNEL);
+	tsc = devm_kzalloc(&pdev->dev, sizeof(struct tps6507x_ts), GFP_KERNEL);
 	if (!tsc) {
 		dev_err(tps6507x_dev->dev, "failed to allocate driver data\n");
 		return -ENOMEM;
@@ -240,11 +240,10 @@ static int tps6507x_ts_probe(struct platform_device *pdev)
 	snprintf(tsc->phys, sizeof(tsc->phys),
 		 "%s/input0", dev_name(tsc->dev));
 
-	poll_dev = input_allocate_polled_device();
+	poll_dev = devm_input_allocate_polled_device(&pdev->dev);
 	if (!poll_dev) {
 		dev_err(tsc->dev, "Failed to allocate polled input device.\n");
-		error = -ENOMEM;
-		goto err_free_mem;
+		return -ENOMEM;
 	}
 
 	tsc->poll_dev = poll_dev;
@@ -274,32 +273,11 @@ static int tps6507x_ts_probe(struct platform_device *pdev)
 
 	error = tps6507x_adc_standby(tsc);
 	if (error)
-		goto err_free_polled_dev;
+		return error;
 
 	error = input_register_polled_device(poll_dev);
 	if (error)
-		goto err_free_polled_dev;
-
-	platform_set_drvdata(pdev, tsc);
-
-	return 0;
-
-err_free_polled_dev:
-	input_free_polled_device(poll_dev);
-err_free_mem:
-	kfree(tsc);
-	return error;
-}
-
-static int tps6507x_ts_remove(struct platform_device *pdev)
-{
-	struct tps6507x_ts *tsc = platform_get_drvdata(pdev);
-	struct input_polled_dev *poll_dev = tsc->poll_dev;
-
-	input_unregister_polled_device(poll_dev);
-	input_free_polled_device(poll_dev);
-
-	kfree(tsc);
+		return error;
 
 	return 0;
 }
@@ -309,7 +287,6 @@ static struct platform_driver tps6507x_ts_driver = {
 		.name = "tps6507x-ts",
 	},
 	.probe = tps6507x_ts_probe,
-	.remove = tps6507x_ts_remove,
 };
 module_platform_driver(tps6507x_ts_driver);
 
diff --git a/drivers/input/touchscreen/tsc2007.h b/drivers/input/touchscreen/tsc2007.h
new file mode 100644
index 000000000000..30fdf5b04a6b
--- /dev/null
+++ b/drivers/input/touchscreen/tsc2007.h
@@ -0,0 +1,101 @@
+
+/*
+ * Copyright (c) 2008 MtekVision Co., Ltd.
+ *	Kwangwoo Lee <kwlee@mtekvision.com>
+ *
+ * Using code from:
+ *  - ads7846.c
+ *	Copyright (c) 2005 David Brownell
+ *	Copyright (c) 2006 Nokia Corporation
+ *  - corgi_ts.c
+ *	Copyright (C) 2004-2005 Richard Purdie
+ *  - omap_ts.[hc], ads7846.h, ts_osk.c
+ *	Copyright (C) 2002 MontaVista Software
+ *	Copyright (C) 2004 Texas Instruments
+ *	Copyright (C) 2005 Dirk Behme
+ *
+ *  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 _TSC2007_H
+#define _TSC2007_H
+
+#define TSC2007_MEASURE_TEMP0		(0x0 << 4)
+#define TSC2007_MEASURE_AUX		(0x2 << 4)
+#define TSC2007_MEASURE_TEMP1		(0x4 << 4)
+#define TSC2007_ACTIVATE_XN		(0x8 << 4)
+#define TSC2007_ACTIVATE_YN		(0x9 << 4)
+#define TSC2007_ACTIVATE_YP_XN		(0xa << 4)
+#define TSC2007_SETUP			(0xb << 4)
+#define TSC2007_MEASURE_X		(0xc << 4)
+#define TSC2007_MEASURE_Y		(0xd << 4)
+#define TSC2007_MEASURE_Z1		(0xe << 4)
+#define TSC2007_MEASURE_Z2		(0xf << 4)
+
+#define TSC2007_POWER_OFF_IRQ_EN	(0x0 << 2)
+#define TSC2007_ADC_ON_IRQ_DIS0		(0x1 << 2)
+#define TSC2007_ADC_OFF_IRQ_EN		(0x2 << 2)
+#define TSC2007_ADC_ON_IRQ_DIS1		(0x3 << 2)
+
+#define TSC2007_12BIT			(0x0 << 1)
+#define TSC2007_8BIT			(0x1 << 1)
+
+#define MAX_12BIT			((1 << 12) - 1)
+
+#define ADC_ON_12BIT	(TSC2007_12BIT | TSC2007_ADC_ON_IRQ_DIS0)
+
+#define READ_Y		(ADC_ON_12BIT | TSC2007_MEASURE_Y)
+#define READ_Z1		(ADC_ON_12BIT | TSC2007_MEASURE_Z1)
+#define READ_Z2		(ADC_ON_12BIT | TSC2007_MEASURE_Z2)
+#define READ_X		(ADC_ON_12BIT | TSC2007_MEASURE_X)
+#define PWRDOWN		(TSC2007_12BIT | TSC2007_POWER_OFF_IRQ_EN)
+
+struct ts_event {
+	u16	x;
+	u16	y;
+	u16	z1, z2;
+};
+
+struct tsc2007 {
+	struct input_dev	*input;
+	char			phys[32];
+
+	struct i2c_client	*client;
+
+	u16			model;
+	u16			x_plate_ohms;
+	u16			max_rt;
+	unsigned long		poll_period; /* in jiffies */
+	int			fuzzx;
+	int			fuzzy;
+	int			fuzzz;
+
+	unsigned int		gpio;
+	int			irq;
+
+	wait_queue_head_t	wait;
+	bool			stopped;
+
+	int			(*get_pendown_state)(struct device *);
+	void			(*clear_penirq)(void);
+
+	struct mutex		mlock;
+};
+
+int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd);
+u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc);
+bool tsc2007_is_pen_down(struct tsc2007 *ts);
+
+#if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2007_IIO)
+/* defined in tsc2007_iio.c */
+int tsc2007_iio_configure(struct tsc2007 *ts);
+#else
+static inline int tsc2007_iio_configure(struct tsc2007 *ts)
+{
+	return 0;
+}
+#endif /* CONFIG_TOUCHSCREEN_TSC2007_IIO */
+
+#endif /* _TSC2007_H */
diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007_core.c
index 5d0cd51c6f41..fc7384936011 100644
--- a/drivers/input/touchscreen/tsc2007.c
+++ b/drivers/input/touchscreen/tsc2007_core.c
@@ -27,70 +27,10 @@
 #include <linux/i2c.h>
 #include <linux/i2c/tsc2007.h>
 #include <linux/of_device.h>
-#include <linux/of.h>
 #include <linux/of_gpio.h>
+#include "tsc2007.h"
 
-#define TSC2007_MEASURE_TEMP0		(0x0 << 4)
-#define TSC2007_MEASURE_AUX		(0x2 << 4)
-#define TSC2007_MEASURE_TEMP1		(0x4 << 4)
-#define TSC2007_ACTIVATE_XN		(0x8 << 4)
-#define TSC2007_ACTIVATE_YN		(0x9 << 4)
-#define TSC2007_ACTIVATE_YP_XN		(0xa << 4)
-#define TSC2007_SETUP			(0xb << 4)
-#define TSC2007_MEASURE_X		(0xc << 4)
-#define TSC2007_MEASURE_Y		(0xd << 4)
-#define TSC2007_MEASURE_Z1		(0xe << 4)
-#define TSC2007_MEASURE_Z2		(0xf << 4)
-
-#define TSC2007_POWER_OFF_IRQ_EN	(0x0 << 2)
-#define TSC2007_ADC_ON_IRQ_DIS0		(0x1 << 2)
-#define TSC2007_ADC_OFF_IRQ_EN		(0x2 << 2)
-#define TSC2007_ADC_ON_IRQ_DIS1		(0x3 << 2)
-
-#define TSC2007_12BIT			(0x0 << 1)
-#define TSC2007_8BIT			(0x1 << 1)
-
-#define	MAX_12BIT			((1 << 12) - 1)
-
-#define ADC_ON_12BIT	(TSC2007_12BIT | TSC2007_ADC_ON_IRQ_DIS0)
-
-#define READ_Y		(ADC_ON_12BIT | TSC2007_MEASURE_Y)
-#define READ_Z1		(ADC_ON_12BIT | TSC2007_MEASURE_Z1)
-#define READ_Z2		(ADC_ON_12BIT | TSC2007_MEASURE_Z2)
-#define READ_X		(ADC_ON_12BIT | TSC2007_MEASURE_X)
-#define PWRDOWN		(TSC2007_12BIT | TSC2007_POWER_OFF_IRQ_EN)
-
-struct ts_event {
-	u16	x;
-	u16	y;
-	u16	z1, z2;
-};
-
-struct tsc2007 {
-	struct input_dev	*input;
-	char			phys[32];
-
-	struct i2c_client	*client;
-
-	u16			model;
-	u16			x_plate_ohms;
-	u16			max_rt;
-	unsigned long		poll_period; /* in jiffies */
-	int			fuzzx;
-	int			fuzzy;
-	int			fuzzz;
-
-	unsigned		gpio;
-	int			irq;
-
-	wait_queue_head_t	wait;
-	bool			stopped;
-
-	int			(*get_pendown_state)(struct device *);
-	void			(*clear_penirq)(void);
-};
-
-static inline int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd)
+int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd)
 {
 	s32 data;
 	u16 val;
@@ -128,7 +68,7 @@ static void tsc2007_read_values(struct tsc2007 *tsc, struct ts_event *tc)
 	tsc2007_xfer(tsc, PWRDOWN);
 }
 
-static u32 tsc2007_calculate_pressure(struct tsc2007 *tsc, struct ts_event *tc)
+u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc)
 {
 	u32 rt = 0;
 
@@ -137,7 +77,7 @@ static u32 tsc2007_calculate_pressure(struct tsc2007 *tsc, struct ts_event *tc)
 		tc->x = 0;
 
 	if (likely(tc->x && tc->z1)) {
-		/* compute touch pressure resistance using equation #1 */
+		/* compute touch resistance using equation #1 */
 		rt = tc->z2 - tc->z1;
 		rt *= tc->x;
 		rt *= tsc->x_plate_ohms;
@@ -148,7 +88,7 @@ static u32 tsc2007_calculate_pressure(struct tsc2007 *tsc, struct ts_event *tc)
 	return rt;
 }
 
-static bool tsc2007_is_pen_down(struct tsc2007 *ts)
+bool tsc2007_is_pen_down(struct tsc2007 *ts)
 {
 	/*
 	 * NOTE: We can't rely on the pressure to determine the pen down
@@ -180,9 +120,12 @@ static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
 	while (!ts->stopped && tsc2007_is_pen_down(ts)) {
 
 		/* pen is down, continue with the measurement */
+
+		mutex_lock(&ts->mlock);
 		tsc2007_read_values(ts, &tc);
+		mutex_unlock(&ts->mlock);
 
-		rt = tsc2007_calculate_pressure(ts, &tc);
+		rt = tsc2007_calculate_resistance(ts, &tc);
 
 		if (!rt && !ts->get_pendown_state) {
 			/*
@@ -195,9 +138,11 @@ static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
 
 		if (rt <= ts->max_rt) {
 			dev_dbg(&ts->client->dev,
-				"DOWN point(%4d,%4d), pressure (%4u)\n",
+				"DOWN point(%4d,%4d), resistance (%4u)\n",
 				tc.x, tc.y, rt);
 
+			rt = ts->max_rt - rt;
+
 			input_report_key(input, BTN_TOUCH, 1);
 			input_report_abs(input, ABS_X, tc.x);
 			input_report_abs(input, ABS_Y, tc.y);
@@ -375,7 +320,8 @@ static void tsc2007_call_exit_platform_hw(void *data)
 static int tsc2007_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
-	const struct tsc2007_platform_data *pdata = dev_get_platdata(&client->dev);
+	const struct tsc2007_platform_data *pdata =
+		dev_get_platdata(&client->dev);
 	struct tsc2007 *ts;
 	struct input_dev *input_dev;
 	int err;
@@ -404,7 +350,9 @@ static int tsc2007_probe(struct i2c_client *client,
 	ts->client = client;
 	ts->irq = client->irq;
 	ts->input = input_dev;
+
 	init_waitqueue_head(&ts->wait);
+	mutex_init(&ts->mlock);
 
 	snprintf(ts->phys, sizeof(ts->phys),
 		 "%s/input0", dev_name(&client->dev));
@@ -418,8 +366,7 @@ static int tsc2007_probe(struct i2c_client *client,
 
 	input_set_drvdata(input_dev, ts);
 
-	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
-	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
 
 	input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, ts->fuzzx, 0);
 	input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, ts->fuzzy, 0);
@@ -455,6 +402,14 @@ static int tsc2007_probe(struct i2c_client *client,
 
 	tsc2007_stop(ts);
 
+	/* power down the chip (TSC2007_SETUP does not ACK on I2C) */
+	err = tsc2007_xfer(ts, PWRDOWN);
+	if (err < 0) {
+		dev_err(&client->dev,
+			"Failed to setup chip: %d\n", err);
+		return err;	/* chip does not respond */
+	}
+
 	err = input_register_device(input_dev);
 	if (err) {
 		dev_err(&client->dev,
@@ -462,6 +417,13 @@ static int tsc2007_probe(struct i2c_client *client,
 		return err;
 	}
 
+	err =  tsc2007_iio_configure(ts);
+	if (err) {
+		dev_err(&client->dev,
+			"Failed to register with IIO: %d\n", err);
+		return err;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/input/touchscreen/tsc2007_iio.c b/drivers/input/touchscreen/tsc2007_iio.c
new file mode 100644
index 000000000000..27b25a9fce83
--- /dev/null
+++ b/drivers/input/touchscreen/tsc2007_iio.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2016 Golden Delicious Comp. GmbH&Co. KG
+ *	Nikolaus Schaller <hns@goldelico.com>
+ *
+ *  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/i2c.h>
+#include <linux/iio/iio.h>
+#include "tsc2007.h"
+
+struct tsc2007_iio {
+	struct tsc2007 *ts;
+};
+
+#define TSC2007_CHAN_IIO(_chan, _name, _type, _chan_info) \
+{ \
+	.datasheet_name = _name, \
+	.type = _type, \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |	\
+			BIT(_chan_info), \
+	.indexed = 1, \
+	.channel = _chan, \
+}
+
+static const struct iio_chan_spec tsc2007_iio_channel[] = {
+	TSC2007_CHAN_IIO(0, "x", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+	TSC2007_CHAN_IIO(1, "y", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+	TSC2007_CHAN_IIO(2, "z1", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+	TSC2007_CHAN_IIO(3, "z2", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+	TSC2007_CHAN_IIO(4, "adc", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
+	TSC2007_CHAN_IIO(5, "rt", IIO_VOLTAGE, IIO_CHAN_INFO_RAW), /* Ohms? */
+	TSC2007_CHAN_IIO(6, "pen", IIO_PRESSURE, IIO_CHAN_INFO_RAW),
+	TSC2007_CHAN_IIO(7, "temp0", IIO_TEMP, IIO_CHAN_INFO_RAW),
+	TSC2007_CHAN_IIO(8, "temp1", IIO_TEMP, IIO_CHAN_INFO_RAW),
+};
+
+static int tsc2007_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct tsc2007_iio *iio = iio_priv(indio_dev);
+	struct tsc2007 *tsc = iio->ts;
+	int adc_chan = chan->channel;
+	int ret = 0;
+
+	if (adc_chan >= ARRAY_SIZE(tsc2007_iio_channel))
+		return -EINVAL;
+
+	if (mask != IIO_CHAN_INFO_RAW)
+		return -EINVAL;
+
+	mutex_lock(&tsc->mlock);
+
+	switch (chan->channel) {
+	case 0:
+		*val = tsc2007_xfer(tsc, READ_X);
+		break;
+	case 1:
+		*val = tsc2007_xfer(tsc, READ_Y);
+		break;
+	case 2:
+		*val = tsc2007_xfer(tsc, READ_Z1);
+		break;
+	case 3:
+		*val = tsc2007_xfer(tsc, READ_Z2);
+		break;
+	case 4:
+		*val = tsc2007_xfer(tsc, (ADC_ON_12BIT | TSC2007_MEASURE_AUX));
+		break;
+	case 5: {
+		struct ts_event tc;
+
+		tc.x = tsc2007_xfer(tsc, READ_X);
+		tc.z1 = tsc2007_xfer(tsc, READ_Z1);
+		tc.z2 = tsc2007_xfer(tsc, READ_Z2);
+		*val = tsc2007_calculate_resistance(tsc, &tc);
+		break;
+	}
+	case 6:
+		*val = tsc2007_is_pen_down(tsc);
+		break;
+	case 7:
+		*val = tsc2007_xfer(tsc,
+				    (ADC_ON_12BIT | TSC2007_MEASURE_TEMP0));
+		break;
+	case 8:
+		*val = tsc2007_xfer(tsc,
+				    (ADC_ON_12BIT | TSC2007_MEASURE_TEMP1));
+		break;
+	}
+
+	/* Prepare for next touch reading - power down ADC, enable PENIRQ */
+	tsc2007_xfer(tsc, PWRDOWN);
+
+	mutex_unlock(&tsc->mlock);
+
+	ret = IIO_VAL_INT;
+
+	return ret;
+}
+
+static const struct iio_info tsc2007_iio_info = {
+	.read_raw = tsc2007_read_raw,
+	.driver_module = THIS_MODULE,
+};
+
+int tsc2007_iio_configure(struct tsc2007 *ts)
+{
+	struct iio_dev *indio_dev;
+	struct tsc2007_iio *iio;
+	int error;
+
+	indio_dev = devm_iio_device_alloc(&ts->client->dev, sizeof(*iio));
+	if (!indio_dev) {
+		dev_err(&ts->client->dev, "iio_device_alloc failed\n");
+		return -ENOMEM;
+	}
+
+	iio = iio_priv(indio_dev);
+	iio->ts = ts;
+
+	indio_dev->name = "tsc2007";
+	indio_dev->dev.parent = &ts->client->dev;
+	indio_dev->info = &tsc2007_iio_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = tsc2007_iio_channel;
+	indio_dev->num_channels = ARRAY_SIZE(tsc2007_iio_channel);
+
+	error = devm_iio_device_register(&ts->client->dev, indio_dev);
+	if (error) {
+		dev_err(&ts->client->dev,
+			"iio_device_register() failed: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}