Commit 8a3cecf5 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

Merge tag 'iio-for-3.14c' of... 

Merge tag 'iio-for-3.14c' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Third round of new drivers, features and cleanups for IIO in the 3.14 cycle.

One new driver a spot of new functionality and a cleanup.

* New driver for the Capella CM32181 ambient light sensor. This is the first
  driver directly from Kevin at Capella with more already in the pipeline.
* Support for configurable predividers on the mxs lradc
* Convert a field to a bitmap in mxs lradc instead of using an array of
  unsigned longs to store boolean values.
parents edd236af 38125b2c

Documentation/devicetree/bindings/i2c/trivial-devices.txt

+1 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ adt7461 +/-1C TDM Extended Temp Range I.C 
at,24c08		i2c serial eeprom  (24cxx)

atmel,24c02		i2c serial eeprom  (24cxx)

atmel,at97sc3204t	i2c trusted platform module (TPM)

capella,cm32181		CM32181: Ambient Light Sensor

catalyst,24c32		i2c serial eeprom

dallas,ds1307		64 x 8, Serial, I2C Real-Time Clock

dallas,ds1338		I2C RTC with 56-Byte NV RAM

drivers/iio/light/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -27,6 +27,17 @@ config APDS9300 
	 To compile this driver as a module, choose M here: the

	 module will be called apds9300.



config CM32181

	depends on I2C

	tristate "CM32181 driver"

	help

	 Say Y here if you use cm32181.

	 This option enables ambient light sensor using

	 Capella cm32181 device driver.



	 To compile this driver as a module, choose M here:

	 the module will be called cm32181.



config CM36651

	depends on I2C

	tristate "CM36651 driver"

drivers/iio/light/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
# When adding new entries keep the list in alphabetical order

obj-$(CONFIG_ADJD_S311)		+= adjd_s311.o

obj-$(CONFIG_APDS9300)		+= apds9300.o

obj-$(CONFIG_CM32181)		+= cm32181.o

obj-$(CONFIG_CM36651)		+= cm36651.o

obj-$(CONFIG_GP2AP020A00F)	+= gp2ap020a00f.o

obj-$(CONFIG_HID_SENSOR_ALS)	+= hid-sensor-als.o

drivers/iio/light/cm32181.c

0 → 100644
+379 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2013 Capella Microsystems Inc.

 * Author: Kevin Tsai <ktsai@capellamicro.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/delay.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/mutex.h>

#include <linux/module.h>

#include <linux/interrupt.h>

#include <linux/regulator/consumer.h>

#include <linux/iio/iio.h>

#include <linux/iio/sysfs.h>

#include <linux/iio/events.h>

#include <linux/init.h>



/* Registers Address */

#define CM32181_REG_ADDR_CMD		0x00

#define CM32181_REG_ADDR_ALS		0x04

#define CM32181_REG_ADDR_STATUS		0x06

#define CM32181_REG_ADDR_ID		0x07



/* Number of Configurable Registers */

#define CM32181_CONF_REG_NUM		0x01



/* CMD register */

#define CM32181_CMD_ALS_ENABLE		0x00

#define CM32181_CMD_ALS_DISABLE		0x01

#define CM32181_CMD_ALS_INT_EN		0x02



#define CM32181_CMD_ALS_IT_SHIFT	6

#define CM32181_CMD_ALS_IT_MASK		(0x0F << CM32181_CMD_ALS_IT_SHIFT)

#define CM32181_CMD_ALS_IT_DEFAULT	(0x00 << CM32181_CMD_ALS_IT_SHIFT)



#define CM32181_CMD_ALS_SM_SHIFT	11

#define CM32181_CMD_ALS_SM_MASK		(0x03 << CM32181_CMD_ALS_SM_SHIFT)

#define CM32181_CMD_ALS_SM_DEFAULT	(0x01 << CM32181_CMD_ALS_SM_SHIFT)



#define CM32181_MLUX_PER_BIT		5	/* ALS_SM=01 IT=800ms */

#define CM32181_MLUX_PER_BIT_BASE_IT	800000	/* Based on IT=800ms */

#define	CM32181_CALIBSCALE_DEFAULT	1000

#define CM32181_CALIBSCALE_RESOLUTION	1000

#define MLUX_PER_LUX			1000



static const u8 cm32181_reg[CM32181_CONF_REG_NUM] = {

	CM32181_REG_ADDR_CMD,

};



static const int als_it_bits[] = {12, 8, 0, 1, 2, 3};

static const int als_it_value[] = {25000, 50000, 100000, 200000, 400000,

	800000};



struct cm32181_chip {

	struct i2c_client *client;

	struct mutex lock;

	u16 conf_regs[CM32181_CONF_REG_NUM];

	int calibscale;

};



/**

 * cm32181_reg_init() - Initialize CM32181 registers

 * @cm32181:	pointer of struct cm32181.

 *

 * Initialize CM32181 ambient light sensor register to default values.

 *

 * Return: 0 for success; otherwise for error code.

 */

static int cm32181_reg_init(struct cm32181_chip *cm32181)

{

	struct i2c_client *client = cm32181->client;

	int i;

	s32 ret;



	ret = i2c_smbus_read_word_data(client, CM32181_REG_ADDR_ID);

	if (ret < 0)

		return ret;



	/* check device ID */

	if ((ret & 0xFF) != 0x81)

		return -ENODEV;



	/* Default Values */

	cm32181->conf_regs[CM32181_REG_ADDR_CMD] = CM32181_CMD_ALS_ENABLE |

			CM32181_CMD_ALS_IT_DEFAULT | CM32181_CMD_ALS_SM_DEFAULT;

	cm32181->calibscale = CM32181_CALIBSCALE_DEFAULT;



	/* Initialize registers*/

	for (i = 0; i < CM32181_CONF_REG_NUM; i++) {

		ret = i2c_smbus_write_word_data(client, cm32181_reg[i],

			cm32181->conf_regs[i]);

		if (ret < 0)

			return ret;

	}



	return 0;

}



/**

 *  cm32181_read_als_it() - Get sensor integration time (ms)

 *  @cm32181:	pointer of struct cm32181

 *  @val:	pointer of int to load the als_it value.

 *

 *  Report the current integartion time by millisecond.

 *

 *  Return: IIO_VAL_INT for success, otherwise -EINVAL.

 */

static int cm32181_read_als_it(struct cm32181_chip *cm32181, int *val)

{

	u16 als_it;

	int i;



	als_it = cm32181->conf_regs[CM32181_REG_ADDR_CMD];

	als_it &= CM32181_CMD_ALS_IT_MASK;

	als_it >>= CM32181_CMD_ALS_IT_SHIFT;

	for (i = 0; i < ARRAY_SIZE(als_it_bits); i++) {

		if (als_it == als_it_bits[i]) {

			*val = als_it_value[i];

			return IIO_VAL_INT;

		}

	}



	return -EINVAL;

}



/**

 * cm32181_write_als_it() - Write sensor integration time

 * @cm32181:	pointer of struct cm32181.

 * @val:	integration time by millisecond.

 *

 * Convert integration time (ms) to sensor value.

 *

 * Return: i2c_smbus_write_word_data command return value.

 */

static int cm32181_write_als_it(struct cm32181_chip *cm32181, int val)

{

	struct i2c_client *client = cm32181->client;

	u16 als_it;

	int ret, i, n;



	n = ARRAY_SIZE(als_it_value);

	for (i = 0; i < n; i++)

		if (val <= als_it_value[i])

			break;

	if (i >= n)

		i = n - 1;



	als_it = als_it_bits[i];

	als_it <<= CM32181_CMD_ALS_IT_SHIFT;



	mutex_lock(&cm32181->lock);

	cm32181->conf_regs[CM32181_REG_ADDR_CMD] &=

		~CM32181_CMD_ALS_IT_MASK;

	cm32181->conf_regs[CM32181_REG_ADDR_CMD] |=

		als_it;

	ret = i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD,

			cm32181->conf_regs[CM32181_REG_ADDR_CMD]);

	mutex_unlock(&cm32181->lock);



	return ret;

}



/**

 * cm32181_get_lux() - report current lux value

 * @cm32181:	pointer of struct cm32181.

 *

 * Convert sensor raw data to lux.  It depends on integration

 * time and claibscale variable.

 *

 * Return: Positive value is lux, otherwise is error code.

 */

static int cm32181_get_lux(struct cm32181_chip *cm32181)

{

	struct i2c_client *client = cm32181->client;

	int ret;

	int als_it;

	unsigned long lux;



	ret = cm32181_read_als_it(cm32181, &als_it);

	if (ret < 0)

		return -EINVAL;



	lux = CM32181_MLUX_PER_BIT;

	lux *= CM32181_MLUX_PER_BIT_BASE_IT;

	lux /= als_it;



	ret = i2c_smbus_read_word_data(client, CM32181_REG_ADDR_ALS);

	if (ret < 0)

		return ret;



	lux *= ret;

	lux *= cm32181->calibscale;

	lux /= CM32181_CALIBSCALE_RESOLUTION;

	lux /= MLUX_PER_LUX;



	if (lux > 0xFFFF)

		lux = 0xFFFF;



	return lux;

}



static int cm32181_read_raw(struct iio_dev *indio_dev,

			    struct iio_chan_spec const *chan,

			    int *val, int *val2, long mask)

{

	struct cm32181_chip *cm32181 = iio_priv(indio_dev);

	int ret;



	switch (mask) {

	case IIO_CHAN_INFO_PROCESSED:

		ret = cm32181_get_lux(cm32181);

		if (ret < 0)

			return ret;

		*val = ret;

		return IIO_VAL_INT;

	case IIO_CHAN_INFO_CALIBSCALE:

		*val = cm32181->calibscale;

		return IIO_VAL_INT;

	case IIO_CHAN_INFO_INT_TIME:

		ret = cm32181_read_als_it(cm32181, val);

		return ret;

	}



	return -EINVAL;

}



static int cm32181_write_raw(struct iio_dev *indio_dev,

			     struct iio_chan_spec const *chan,

			     int val, int val2, long mask)

{

	struct cm32181_chip *cm32181 = iio_priv(indio_dev);

	int ret;



	switch (mask) {

	case IIO_CHAN_INFO_CALIBSCALE:

		cm32181->calibscale = val;

		return val;

	case IIO_CHAN_INFO_INT_TIME:

		ret = cm32181_write_als_it(cm32181, val);

		return ret;

	}



	return -EINVAL;

}



/**

 * cm32181_get_it_available() - Get available ALS IT value

 * @dev:	pointer of struct device.

 * @attr:	pointer of struct device_attribute.

 * @buf:	pointer of return string buffer.

 *

 * Display the available integration time values by millisecond.

 *

 * Return: string length.

 */

static ssize_t cm32181_get_it_available(struct device *dev,

			struct device_attribute *attr, char *buf)

{

	int i, n, len;



	n = ARRAY_SIZE(als_it_value);

	for (i = 0, len = 0; i < n; i++)

		len += sprintf(buf + len, "%d ", als_it_value[i]);

	return len + sprintf(buf + len, "\n");

}



static const struct iio_chan_spec cm32181_channels[] = {

	{

		.type = IIO_LIGHT,

		.info_mask_separate =

			BIT(IIO_CHAN_INFO_PROCESSED) |

			BIT(IIO_CHAN_INFO_CALIBSCALE) |

			BIT(IIO_CHAN_INFO_INT_TIME),

	}

};



static IIO_DEVICE_ATTR(in_illuminance_integration_time_available,

			S_IRUGO, cm32181_get_it_available, NULL, 0);



static struct attribute *cm32181_attributes[] = {

	&iio_dev_attr_in_illuminance_integration_time_available.dev_attr.attr,

	NULL,

};



static const struct attribute_group cm32181_attribute_group = {

	.attrs = cm32181_attributes

};



static const struct iio_info cm32181_info = {

	.driver_module		= THIS_MODULE,

	.read_raw		= &cm32181_read_raw,

	.write_raw		= &cm32181_write_raw,

	.attrs			= &cm32181_attribute_group,

};



static int cm32181_probe(struct i2c_client *client,

			const struct i2c_device_id *id)

{

	struct cm32181_chip *cm32181;

	struct iio_dev *indio_dev;

	int ret;



	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*cm32181));

	if (!indio_dev) {

		dev_err(&client->dev, "devm_iio_device_alloc failed\n");

		return -ENOMEM;

	}



	cm32181 = iio_priv(indio_dev);

	i2c_set_clientdata(client, indio_dev);

	cm32181->client = client;



	mutex_init(&cm32181->lock);

	indio_dev->dev.parent = &client->dev;

	indio_dev->channels = cm32181_channels;

	indio_dev->num_channels = ARRAY_SIZE(cm32181_channels);

	indio_dev->info = &cm32181_info;

	indio_dev->name = id->name;

	indio_dev->modes = INDIO_DIRECT_MODE;



	ret = cm32181_reg_init(cm32181);

	if (ret) {

		dev_err(&client->dev,

			"%s: register init failed\n",

			__func__);

		return ret;

	}



	ret = iio_device_register(indio_dev);

	if (ret) {

		dev_err(&client->dev,

			"%s: regist device failed\n",

			__func__);

		return ret;

	}



	return 0;

}



static int cm32181_remove(struct i2c_client *client)

{

	struct iio_dev *indio_dev = i2c_get_clientdata(client);



	iio_device_unregister(indio_dev);

	return 0;

}



static const struct i2c_device_id cm32181_id[] = {

	{ "cm32181", 0 },

	{ }

};



MODULE_DEVICE_TABLE(i2c, cm32181_id);



static const struct of_device_id cm32181_of_match[] = {

	{ .compatible = "capella,cm32181" },

	{ }

};



static struct i2c_driver cm32181_driver = {

	.driver = {

		.name	= "cm32181",

		.of_match_table = of_match_ptr(cm32181_of_match),

		.owner	= THIS_MODULE,

	},

	.id_table       = cm32181_id,

	.probe		= cm32181_probe,

	.remove		= cm32181_remove,

};



module_i2c_driver(cm32181_driver);



MODULE_AUTHOR("Kevin Tsai <ktsai@capellamicro.com>");

MODULE_DESCRIPTION("CM32181 ambient light sensor driver");

MODULE_LICENSE("GPL");

drivers/staging/iio/adc/mxs-lradc.c

+219 −3
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include <linux/clk.h>



#include <linux/iio/iio.h>

#include <linux/iio/sysfs.h>

#include <linux/iio/buffer.h>

#include <linux/iio/trigger.h>

#include <linux/iio/trigger_consumer.h>
@@ -111,16 +112,59 @@ static const char * const mx28_lradc_irq_names[] = { 
struct mxs_lradc_of_config {

	const int		irq_count;

	const char * const	*irq_name;

	const uint32_t		*vref_mv;

};



#define VREF_MV_BASE 1850



static const uint32_t mx23_vref_mv[LRADC_MAX_TOTAL_CHANS] = {

	VREF_MV_BASE,		/* CH0 */

	VREF_MV_BASE,		/* CH1 */

	VREF_MV_BASE,		/* CH2 */

	VREF_MV_BASE,		/* CH3 */

	VREF_MV_BASE,		/* CH4 */

	VREF_MV_BASE,		/* CH5 */

	VREF_MV_BASE * 2,	/* CH6 VDDIO */

	VREF_MV_BASE * 4,	/* CH7 VBATT */

	VREF_MV_BASE,		/* CH8 Temp sense 0 */

	VREF_MV_BASE,		/* CH9 Temp sense 1 */

	VREF_MV_BASE,		/* CH10 */

	VREF_MV_BASE,		/* CH11 */

	VREF_MV_BASE,		/* CH12 USB_DP */

	VREF_MV_BASE,		/* CH13 USB_DN */

	VREF_MV_BASE,		/* CH14 VBG */

	VREF_MV_BASE * 4,	/* CH15 VDD5V */

};



static const uint32_t mx28_vref_mv[LRADC_MAX_TOTAL_CHANS] = {

	VREF_MV_BASE,		/* CH0 */

	VREF_MV_BASE,		/* CH1 */

	VREF_MV_BASE,		/* CH2 */

	VREF_MV_BASE,		/* CH3 */

	VREF_MV_BASE,		/* CH4 */

	VREF_MV_BASE,		/* CH5 */

	VREF_MV_BASE,		/* CH6 */

	VREF_MV_BASE * 4,	/* CH7 VBATT */

	VREF_MV_BASE,		/* CH8 Temp sense 0 */

	VREF_MV_BASE,		/* CH9 Temp sense 1 */

	VREF_MV_BASE * 2,	/* CH10 VDDIO */

	VREF_MV_BASE,		/* CH11 VTH */

	VREF_MV_BASE * 2,	/* CH12 VDDA */

	VREF_MV_BASE,		/* CH13 VDDD */

	VREF_MV_BASE,		/* CH14 VBG */

	VREF_MV_BASE * 4,	/* CH15 VDD5V */

};



static const struct mxs_lradc_of_config mxs_lradc_of_config[] = {

	[IMX23_LRADC] = {

		.irq_count	= ARRAY_SIZE(mx23_lradc_irq_names),

		.irq_name	= mx23_lradc_irq_names,

		.vref_mv	= mx23_vref_mv,

	},

	[IMX28_LRADC] = {

		.irq_count	= ARRAY_SIZE(mx28_lradc_irq_names),

		.irq_name	= mx28_lradc_irq_names,

		.vref_mv	= mx28_vref_mv,

	},

};
@@ -141,6 +185,16 @@ enum lradc_ts_plate { 
	LRADC_SAMPLE_VALID,

};



enum mxs_lradc_divbytwo {

	MXS_LRADC_DIV_DISABLED = 0,

	MXS_LRADC_DIV_ENABLED,

};



struct mxs_lradc_scale {

	unsigned int		integer;

	unsigned int		nano;

};



struct mxs_lradc {

	struct device		*dev;

	void __iomem		*base;
@@ -155,6 +209,10 @@ struct mxs_lradc { 


	struct completion	completion;



	const uint32_t		*vref_mv;

	struct mxs_lradc_scale	scale_avail[LRADC_MAX_TOTAL_CHANS][2];

	unsigned long		is_divided;



	/*

	 * Touchscreen LRADC channels receives a private slot in the CTRL4

	 * register, the slot #7. Therefore only 7 slots instead of 8 in the
@@ -243,6 +301,7 @@ struct mxs_lradc { 
#define	LRADC_CTRL1_LRADC_IRQ_OFFSET		0



#define	LRADC_CTRL2				0x20

#define	LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET	24

#define	LRADC_CTRL2_TEMPSENSE_PWD		(1 << 15)



#define	LRADC_STATUS				0x40
@@ -836,6 +895,8 @@ static int mxs_lradc_read_raw(struct iio_dev *iio_dev, 
			const struct iio_chan_spec *chan,

			int *val, int *val2, long m)

{

	struct mxs_lradc *lradc = iio_priv(iio_dev);



	/* Check for invalid channel */

	if (chan->channel > LRADC_MAX_TOTAL_CHANS)

		return -EINVAL;
@@ -857,7 +918,10 @@ static int mxs_lradc_read_raw(struct iio_dev *iio_dev, 
			return IIO_VAL_INT_PLUS_MICRO;

		}



		return -EINVAL;

		*val = lradc->vref_mv[chan->channel];

		*val2 = chan->scan_type.realbits -

			test_bit(chan->channel, &lradc->is_divided);

		return IIO_VAL_FRACTIONAL_LOG2;



	case IIO_CHAN_INFO_OFFSET:

		if (chan->type == IIO_TEMP) {
@@ -880,9 +944,136 @@ static int mxs_lradc_read_raw(struct iio_dev *iio_dev, 
	return -EINVAL;

}



static int mxs_lradc_write_raw(struct iio_dev *iio_dev,

			       const struct iio_chan_spec *chan,

			       int val, int val2, long m)

{

	struct mxs_lradc *lradc = iio_priv(iio_dev);

	struct mxs_lradc_scale *scale_avail =

			lradc->scale_avail[chan->channel];

	int ret;



	ret = mutex_trylock(&lradc->lock);

	if (!ret)

		return -EBUSY;



	switch (m) {

	case IIO_CHAN_INFO_SCALE:

		ret = -EINVAL;

		if (val == scale_avail[MXS_LRADC_DIV_DISABLED].integer &&

		    val2 == scale_avail[MXS_LRADC_DIV_DISABLED].nano) {

			/* divider by two disabled */

			writel(1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET,

			       lradc->base + LRADC_CTRL2 + STMP_OFFSET_REG_CLR);

			clear_bit(chan->channel, &lradc->is_divided);

			ret = 0;

		} else if (val == scale_avail[MXS_LRADC_DIV_ENABLED].integer &&

			   val2 == scale_avail[MXS_LRADC_DIV_ENABLED].nano) {

			/* divider by two enabled */

			writel(1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET,

			       lradc->base + LRADC_CTRL2 + STMP_OFFSET_REG_SET);

			set_bit(chan->channel, &lradc->is_divided);

			ret = 0;

		}



		break;

	default:

		ret = -EINVAL;

		break;

	}



	mutex_unlock(&lradc->lock);



	return ret;

}



static int mxs_lradc_write_raw_get_fmt(struct iio_dev *iio_dev,

				       const struct iio_chan_spec *chan,

				       long m)

{

	return IIO_VAL_INT_PLUS_NANO;

}



static ssize_t mxs_lradc_show_scale_available_ch(struct device *dev,

		struct device_attribute *attr,

		char *buf,

		int ch)

{

	struct iio_dev *iio = dev_to_iio_dev(dev);

	struct mxs_lradc *lradc = iio_priv(iio);

	int i, len = 0;



	for (i = 0; i < ARRAY_SIZE(lradc->scale_avail[ch]); i++)

		len += sprintf(buf + len, "%d.%09u ",

			       lradc->scale_avail[ch][i].integer,

			       lradc->scale_avail[ch][i].nano);



	len += sprintf(buf + len, "\n");



	return len;

}



static ssize_t mxs_lradc_show_scale_available(struct device *dev,

		struct device_attribute *attr,

		char *buf)

{

	struct iio_dev_attr *iio_attr = to_iio_dev_attr(attr);



	return mxs_lradc_show_scale_available_ch(dev, attr, buf,

						 iio_attr->address);

}



#define SHOW_SCALE_AVAILABLE_ATTR(ch)					\

static IIO_DEVICE_ATTR(in_voltage##ch##_scale_available, S_IRUGO,	\

		       mxs_lradc_show_scale_available, NULL, ch)



SHOW_SCALE_AVAILABLE_ATTR(0);

SHOW_SCALE_AVAILABLE_ATTR(1);

SHOW_SCALE_AVAILABLE_ATTR(2);

SHOW_SCALE_AVAILABLE_ATTR(3);

SHOW_SCALE_AVAILABLE_ATTR(4);

SHOW_SCALE_AVAILABLE_ATTR(5);

SHOW_SCALE_AVAILABLE_ATTR(6);

SHOW_SCALE_AVAILABLE_ATTR(7);

SHOW_SCALE_AVAILABLE_ATTR(8);

SHOW_SCALE_AVAILABLE_ATTR(9);

SHOW_SCALE_AVAILABLE_ATTR(10);

SHOW_SCALE_AVAILABLE_ATTR(11);

SHOW_SCALE_AVAILABLE_ATTR(12);

SHOW_SCALE_AVAILABLE_ATTR(13);

SHOW_SCALE_AVAILABLE_ATTR(14);

SHOW_SCALE_AVAILABLE_ATTR(15);



static struct attribute *mxs_lradc_attributes[] = {

	&iio_dev_attr_in_voltage0_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage1_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage2_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage3_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage4_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage5_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage6_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage7_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage8_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage9_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage10_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage11_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage12_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage13_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage14_scale_available.dev_attr.attr,

	&iio_dev_attr_in_voltage15_scale_available.dev_attr.attr,

	NULL

};



static const struct attribute_group mxs_lradc_attribute_group = {

	.attrs = mxs_lradc_attributes,

};



static const struct iio_info mxs_lradc_iio_info = {

	.driver_module		= THIS_MODULE,

	.read_raw		= mxs_lradc_read_raw,

	.write_raw		= mxs_lradc_write_raw,

	.write_raw_get_fmt	= mxs_lradc_write_raw_get_fmt,

	.attrs			= &mxs_lradc_attribute_group,

};



static int mxs_lradc_ts_open(struct input_dev *dev)
@@ -1189,8 +1380,10 @@ static const struct iio_buffer_setup_ops mxs_lradc_buffer_ops = { 
	.type = (chan_type),					\

	.indexed = 1,						\

	.scan_index = (idx),					\

	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\

	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\

			      BIT(IIO_CHAN_INFO_SCALE),		\

	.channel = (idx),					\

	.address = (idx),					\

	.scan_type = {						\

		.sign = 'u',					\

		.realbits = LRADC_RESOLUTION,			\
@@ -1336,7 +1529,8 @@ static int mxs_lradc_probe(struct platform_device *pdev) 
	struct iio_dev *iio;

	struct resource *iores;

	int ret = 0, touch_ret;

	int i;

	int i, s;

	unsigned int scale_uv;



	/* Allocate the IIO device. */

	iio = devm_iio_device_alloc(dev, sizeof(*lradc));
@@ -1381,6 +1575,8 @@ static int mxs_lradc_probe(struct platform_device *pdev) 
			return ret;

	}



	lradc->vref_mv = of_cfg->vref_mv;



	platform_set_drvdata(pdev, iio);



	init_completion(&lradc->completion);
@@ -1404,6 +1600,26 @@ static int mxs_lradc_probe(struct platform_device *pdev) 
	if (ret)

		goto err_trig;



	/* Populate available ADC input ranges */

	for (i = 0; i < LRADC_MAX_TOTAL_CHANS; i++) {

		for (s = 0; s < ARRAY_SIZE(lradc->scale_avail[i]); s++) {

			/*

			 * [s=0] = optional divider by two disabled (default)

			 * [s=1] = optional divider by two enabled

			 *

			 * The scale is calculated by doing:

			 *   Vref >> (realbits - s)

			 * which multiplies by two on the second component

			 * of the array.

			 */

			scale_uv = ((u64)lradc->vref_mv[i] * 100000000) >>

				   (iio->channels[i].scan_type.realbits - s);

			lradc->scale_avail[i][s].nano =

					do_div(scale_uv, 100000000) * 10;

			lradc->scale_avail[i][s].integer = scale_uv;

		}

	}



	/* Configure the hardware. */

	ret = mxs_lradc_hw_init(lradc);

	if (ret)

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