Commit f641f667 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

Merge tag 'iio-for-3.17a' of... 

Merge tag 'iio-for-3.17a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First round of new drivers, cleanups and functionality for the 3.17 cycle.

New drivers
* t5403 barometric pressure sensor
* kxcjk1013 accelerometer (with a locking followup fix).
* ak09911 digital compass

Documentation
* ABI docs for proximity added (interface has been there a long time but
  somehow snuck through without being documented)
* Move iio-trig-sysfs documentation out of staging (got left behind when
  the driver moved some time ago).

Cleanups
 * drop the timestamp argument from iio_trigger_poll(_chained) as
   nothing has been done with it for some time.
 * ad799x kerneldoc for ad799x_chip brought up to date.
 * replace a number of reimplementations of the GENMASK macro and
   use the BIT macro to cleanup a few locations.
 * bring the iio_event_monitor example program up to date with new
   device types.
 * fix some incorrect function prototypes in iio_utils.h example code.
 * INDIO_RING_TRIGGERED to INDIO_BUFFER_TRIGGERED fix in docs. This
   got left behind after we renamed it a long time back.
 * fix error handling in the generic_buffer example program.
 * small tidy ups in the iio-trig-periodic-rtc driver.
 * Allow reseting iio-trig-periodic-rtc frequency to 0 (default) after
   it has changed.
 * Trivial tidy ups in coding style in iio_simply_dummy
parents 98e11370 88f6da77

Documentation/ABI/testing/sysfs-bus-iio

+13 −0
Original line number Diff line number Diff line
@@ -895,6 +895,19 @@ Description: 
		on-chip EEPROM. After power-up or chip reset the device will

		automatically load the saved configuration.



What:		/sys/.../iio:deviceX/in_proximity_raw

What:		/sys/.../iio:deviceX/in_proximity_input

What:		/sys/.../iio:deviceX/in_proximityY_raw

KernelVersion:	3.4

Contact:	linux-iio@vger.kernel.org

Description:

		Proximity measurement indicating that some

		object is near the sensor, usually be observing

		reflectivity of infrared or ultrasound emitted.

		Often these sensors are unit less and as such conversion

		to SI units is not possible.  Where it is, the units should

		be meters.



What:		/sys/.../iio:deviceX/in_illuminanceY_input

What:		/sys/.../iio:deviceX/in_illuminanceY_raw

What:		/sys/.../iio:deviceX/in_illuminanceY_mean_raw

drivers/iio/accel/Kconfig

+12 −0
Original line number Diff line number Diff line
@@ -77,4 +77,16 @@ config MMA8452 
	  To compile this driver as a module, choose M here: the module

	  will be called mma8452.



config KXCJK1013

	tristate "Kionix 3-Axis Accelerometer Driver"

	depends on I2C

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	help

	  Say Y here if you want to build a driver for the Kionix KXCJK-1013

	  triaxial acceleration sensor.



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

	  be called kxcjk-1013.



endmenu

drivers/iio/accel/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_BMA180) += bma180.o

obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o

obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o

obj-$(CONFIG_KXSD9)	+= kxsd9.o

obj-$(CONFIG_MMA8452)	+= mma8452.o

drivers/iio/accel/kxcjk-1013.c

0 → 100644
+764 −0
Original line number Diff line number Diff line 
/*

 * KXCJK-1013 3-axis accelerometer driver

 * Copyright (c) 2014, Intel Corporation.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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/i2c.h>

#include <linux/interrupt.h>

#include <linux/delay.h>

#include <linux/bitops.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/acpi.h>

#include <linux/gpio/consumer.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>

#include <linux/iio/triggered_buffer.h>

#include <linux/iio/accel/kxcjk_1013.h>



#define KXCJK1013_DRV_NAME "kxcjk1013"

#define KXCJK1013_IRQ_NAME "kxcjk1013_event"



#define KXCJK1013_REG_XOUT_L		0x06

/*

 * From low byte X axis register, all the other addresses of Y and Z can be

 * obtained by just applying axis offset. The following axis defines are just

 * provide clarity, but not used.

 */

#define KXCJK1013_REG_XOUT_H		0x07

#define KXCJK1013_REG_YOUT_L		0x08

#define KXCJK1013_REG_YOUT_H		0x09

#define KXCJK1013_REG_ZOUT_L		0x0A

#define KXCJK1013_REG_ZOUT_H		0x0B



#define KXCJK1013_REG_DCST_RESP		0x0C

#define KXCJK1013_REG_WHO_AM_I		0x0F

#define KXCJK1013_REG_INT_SRC1		0x16

#define KXCJK1013_REG_INT_SRC2		0x17

#define KXCJK1013_REG_STATUS_REG	0x18

#define KXCJK1013_REG_INT_REL		0x1A

#define KXCJK1013_REG_CTRL1		0x1B

#define KXCJK1013_REG_CTRL2		0x1D

#define KXCJK1013_REG_INT_CTRL1		0x1E

#define KXCJK1013_REG_INT_CTRL2		0x1F

#define KXCJK1013_REG_DATA_CTRL		0x21

#define KXCJK1013_REG_WAKE_TIMER	0x29

#define KXCJK1013_REG_SELF_TEST		0x3A

#define KXCJK1013_REG_WAKE_THRES	0x6A



#define KXCJK1013_REG_CTRL1_BIT_PC1	BIT(7)

#define KXCJK1013_REG_CTRL1_BIT_RES	BIT(6)

#define KXCJK1013_REG_CTRL1_BIT_DRDY	BIT(5)

#define KXCJK1013_REG_CTRL1_BIT_GSEL1	BIT(4)

#define KXCJK1013_REG_CTRL1_BIT_GSEL0	BIT(3)

#define KXCJK1013_REG_CTRL1_BIT_WUFE	BIT(1)

#define KXCJK1013_REG_INT_REG1_BIT_IEA	BIT(4)

#define KXCJK1013_REG_INT_REG1_BIT_IEN	BIT(5)



#define KXCJK1013_DATA_MASK_12_BIT	0x0FFF

#define KXCJK1013_MAX_STARTUP_TIME_US	100000



struct kxcjk1013_data {

	struct i2c_client *client;

	struct iio_trigger *trig;

	bool trig_mode;

	struct mutex mutex;

	s16 buffer[8];

	int power_state;

	u8 odr_bits;

	bool active_high_intr;

};



enum kxcjk1013_axis {

	AXIS_X,

	AXIS_Y,

	AXIS_Z,

};



enum kxcjk1013_mode {

	STANDBY,

	OPERATION,

};



static const struct {

	int val;

	int val2;

	int odr_bits;

} samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},

			{3, 125000, 0x0A}, {6, 25000, 0x0B}, {12, 5000, 0},

			{25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},

			{200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},

			{1600, 0, 0x07} };



/* Refer to section 4 of the specification */

static const struct {

	int odr_bits;

	int usec;

} odr_start_up_times[] = { {0x08, 100000}, {0x09, 100000}, {0x0A, 100000},

			   {0x0B, 100000}, { 0, 80000}, {0x01, 41000},

			   {0x02, 21000}, {0x03, 11000}, {0x04, 6400},

			   {0x05, 3900}, {0x06, 2700}, {0x07, 2100} };



static int kxcjk1013_set_mode(struct kxcjk1013_data *data,

			      enum kxcjk1013_mode mode)

{

	int ret;



	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");

		return ret;

	}



	if (mode == STANDBY)

		ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;

	else

		ret |= KXCJK1013_REG_CTRL1_BIT_PC1;



	ret = i2c_smbus_write_byte_data(data->client,

					KXCJK1013_REG_CTRL1, ret);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");

		return ret;

	}



	return 0;

}



static int kxcjk1013_chip_ack_intr(struct kxcjk1013_data *data)

{

	int ret;



	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error writing reg_int_rel\n");

		return ret;

	}



	return ret;

}



static int kxcjk1013_chip_init(struct kxcjk1013_data *data)

{

	int ret;



	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error reading who_am_i\n");

		return ret;

	}



	dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);



	ret = kxcjk1013_set_mode(data, STANDBY);

	if (ret < 0)

		return ret;



	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");

		return ret;

	}



	/* Setting range to 4G */

	ret |= KXCJK1013_REG_CTRL1_BIT_GSEL0;

	ret &= ~KXCJK1013_REG_CTRL1_BIT_GSEL1;



	/* Set 12 bit mode */

	ret |= KXCJK1013_REG_CTRL1_BIT_RES;



	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,

					ret);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error reading reg_ctrl\n");

		return ret;

	}



	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");

		return ret;

	}



	data->odr_bits = ret;



	/* Set up INT polarity */

	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");

		return ret;

	}



	if (data->active_high_intr)

		ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;

	else

		ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;



	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,

					ret);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");

		return ret;

	}



	return 0;

}



static int kxcjk1013_chip_setup_interrupt(struct kxcjk1013_data *data,

					  bool status)

{

	int ret;



	/* This is requirement by spec to change state to STANDBY */

	ret = kxcjk1013_set_mode(data, STANDBY);

	if (ret < 0)

		return ret;



	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");

		return ret;

	}



	if (status)

		ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;

	else

		ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;



	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,

					ret);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");

		return ret;

	}



	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");

		return ret;

	}



	if (status)

		ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;

	else

		ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;



	ret = i2c_smbus_write_byte_data(data->client,

					KXCJK1013_REG_CTRL1, ret);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");

		return ret;

	}



	return ret;

}



static int kxcjk1013_convert_freq_to_bit(int val, int val2)

{

	int i;



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

		if (samp_freq_table[i].val == val &&

			samp_freq_table[i].val2 == val2) {

			return samp_freq_table[i].odr_bits;

		}

	}



	return -EINVAL;

}



static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)

{

	int ret;

	int odr_bits;



	odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);

	if (odr_bits < 0)

		return odr_bits;



	/* To change ODR, the chip must be set to STANDBY as per spec */

	ret = kxcjk1013_set_mode(data, STANDBY);

	if (ret < 0)

		return ret;



	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,

					odr_bits);

	if (ret < 0) {

		dev_err(&data->client->dev, "Error writing data_ctrl\n");

		return ret;

	}



	data->odr_bits = odr_bits;



	/* Check, if the ODR is changed after data enable */

	if (data->power_state) {

		/* Set the state back to operation */

		ret = kxcjk1013_set_mode(data, OPERATION);

		if (ret < 0)

			return ret;

	}



	return 0;

}



static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)

{

	int i;



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

		if (samp_freq_table[i].odr_bits == data->odr_bits) {

			*val = samp_freq_table[i].val;

			*val2 = samp_freq_table[i].val2;

			return IIO_VAL_INT_PLUS_MICRO;

		}

	}



	return -EINVAL;

}



static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)

{

	u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;

	int ret;



	ret = i2c_smbus_read_word_data(data->client, reg);

	if (ret < 0) {

		dev_err(&data->client->dev,

			"failed to read accel_%c registers\n", 'x' + axis);

		return ret;

	}



	return ret;

}



static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)

{

	int i;



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

		if (odr_start_up_times[i].odr_bits == data->odr_bits)

			return odr_start_up_times[i].usec;

	}



	return KXCJK1013_MAX_STARTUP_TIME_US;

}



static int kxcjk1013_read_raw(struct iio_dev *indio_dev,

			      struct iio_chan_spec const *chan, int *val,

			      int *val2, long mask)

{

	struct kxcjk1013_data *data = iio_priv(indio_dev);

	int ret;



	switch (mask) {

	case IIO_CHAN_INFO_RAW:

		mutex_lock(&data->mutex);

		if (iio_buffer_enabled(indio_dev))

			ret = -EBUSY;

		else {

			int sleep_val;



			ret = kxcjk1013_set_mode(data, OPERATION);

			if (ret < 0) {

				mutex_unlock(&data->mutex);

				return ret;

			}

			++data->power_state;

			sleep_val = kxcjk1013_get_startup_times(data);

			if (sleep_val < 20000)

				usleep_range(sleep_val, 20000);

			else

				msleep_interruptible(sleep_val/1000);

			ret = kxcjk1013_get_acc_reg(data, chan->scan_index);

			if (--data->power_state == 0)

				kxcjk1013_set_mode(data, STANDBY);

		}

		mutex_unlock(&data->mutex);



		if (ret < 0)

			return ret;



		*val = sign_extend32(ret >> 4, 11);

		return IIO_VAL_INT;



	case IIO_CHAN_INFO_SCALE:

		*val = 0;

		*val2 = 19163; /* range +-4g (4/2047*9.806650) */

		return IIO_VAL_INT_PLUS_MICRO;



	case IIO_CHAN_INFO_SAMP_FREQ:

		mutex_lock(&data->mutex);

		ret = kxcjk1013_get_odr(data, val, val2);

		mutex_unlock(&data->mutex);

		return ret;



	default:

		return -EINVAL;

	}

}



static int kxcjk1013_write_raw(struct iio_dev *indio_dev,

			       struct iio_chan_spec const *chan, int val,

			       int val2, long mask)

{

	struct kxcjk1013_data *data = iio_priv(indio_dev);

	int ret;



	switch (mask) {

	case IIO_CHAN_INFO_SAMP_FREQ:

		mutex_lock(&data->mutex);

		ret = kxcjk1013_set_odr(data, val, val2);

		mutex_unlock(&data->mutex);

		break;

	default:

		ret = -EINVAL;

	}



	return ret;

}



static int kxcjk1013_validate_trigger(struct iio_dev *indio_dev,

				      struct iio_trigger *trig)

{

	struct kxcjk1013_data *data = iio_priv(indio_dev);



	if (data->trig != trig)

		return -EINVAL;



	return 0;

}



static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(

	"0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");



static struct attribute *kxcjk1013_attributes[] = {

	&iio_const_attr_sampling_frequency_available.dev_attr.attr,

	NULL,

};



static const struct attribute_group kxcjk1013_attrs_group = {

	.attrs = kxcjk1013_attributes,

};



#define KXCJK1013_CHANNEL(_axis) {					\

	.type = IIO_ACCEL,						\

	.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 = AXIS_##_axis,					\

	.scan_type = {							\

		.sign = 's',						\

		.realbits = 12,						\

		.storagebits = 16,					\

		.shift = 4,						\

		.endianness = IIO_LE,					\

	},								\

}



static const struct iio_chan_spec kxcjk1013_channels[] = {

	KXCJK1013_CHANNEL(X),

	KXCJK1013_CHANNEL(Y),

	KXCJK1013_CHANNEL(Z),

	IIO_CHAN_SOFT_TIMESTAMP(3),

};



static const struct iio_info kxcjk1013_info = {

	.attrs			= &kxcjk1013_attrs_group,

	.read_raw		= kxcjk1013_read_raw,

	.write_raw		= kxcjk1013_write_raw,

	.validate_trigger	= kxcjk1013_validate_trigger,

	.driver_module		= THIS_MODULE,

};



static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)

{

	struct iio_poll_func *pf = p;

	struct iio_dev *indio_dev = pf->indio_dev;

	struct kxcjk1013_data *data = iio_priv(indio_dev);

	int bit, ret, i = 0;



	mutex_lock(&data->mutex);



	for_each_set_bit(bit, indio_dev->buffer->scan_mask,

			 indio_dev->masklength) {

		ret = kxcjk1013_get_acc_reg(data, bit);

		if (ret < 0) {

			kxcjk1013_chip_ack_intr(data);

			mutex_unlock(&data->mutex);

			goto err;

		}

		data->buffer[i++] = ret;

	}



	kxcjk1013_chip_ack_intr(data);



	mutex_unlock(&data->mutex);



	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,

					   pf->timestamp);

err:

	iio_trigger_notify_done(indio_dev->trig);



	return IRQ_HANDLED;

}



static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,

						bool state)

{

	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);

	struct kxcjk1013_data *data = iio_priv(indio_dev);



	mutex_lock(&data->mutex);

	if (state) {

		kxcjk1013_chip_setup_interrupt(data, true);

		kxcjk1013_set_mode(data, OPERATION);

		++data->power_state;

	} else {

		if (--data->power_state) {

			mutex_unlock(&data->mutex);

			return 0;

		}

		kxcjk1013_chip_setup_interrupt(data, false);

		kxcjk1013_set_mode(data, STANDBY);

	}

	mutex_unlock(&data->mutex);



	return 0;

}



static const struct iio_trigger_ops kxcjk1013_trigger_ops = {

	.set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,

	.owner = THIS_MODULE,

};



static int kxcjk1013_acpi_gpio_probe(struct i2c_client *client,

				     struct kxcjk1013_data *data)

{

	const struct acpi_device_id *id;

	struct device *dev;

	struct gpio_desc *gpio;

	int ret;



	if (!client)

		return -EINVAL;



	dev = &client->dev;

	if (!ACPI_HANDLE(dev))

		return -ENODEV;



	id = acpi_match_device(dev->driver->acpi_match_table, dev);

	if (!id)

		return -ENODEV;



	/* data ready gpio interrupt pin */

	gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0);

	if (IS_ERR(gpio)) {

		dev_err(dev, "acpi gpio get index failed\n");

		return PTR_ERR(gpio);

	}



	ret = gpiod_direction_input(gpio);

	if (ret)

		return ret;



	ret = gpiod_to_irq(gpio);



	dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);



	return ret;

}



static int kxcjk1013_probe(struct i2c_client *client,

			   const struct i2c_device_id *id)

{

	struct kxcjk1013_data *data;

	struct iio_dev *indio_dev;

	struct iio_trigger *trig = NULL;

	struct kxcjk_1013_platform_data *pdata;

	int ret;



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

	if (!indio_dev)

		return -ENOMEM;



	data = iio_priv(indio_dev);

	i2c_set_clientdata(client, indio_dev);

	data->client = client;



	pdata = dev_get_platdata(&client->dev);

	if (pdata)

		data->active_high_intr = pdata->active_high_intr;

	else

		data->active_high_intr = true; /* default polarity */



	ret = kxcjk1013_chip_init(data);

	if (ret < 0)

		return ret;



	mutex_init(&data->mutex);



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

	indio_dev->channels = kxcjk1013_channels;

	indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);

	indio_dev->name = KXCJK1013_DRV_NAME;

	indio_dev->modes = INDIO_DIRECT_MODE;

	indio_dev->info = &kxcjk1013_info;



	if (client->irq < 0)

		client->irq = kxcjk1013_acpi_gpio_probe(client, data);



	if (client->irq >= 0) {

		trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,

					 indio_dev->id);

		if (!trig)

			return -ENOMEM;



		data->trig_mode = true;



		ret = devm_request_irq(&client->dev, client->irq,

					iio_trigger_generic_data_rdy_poll,

					IRQF_TRIGGER_RISING,

					KXCJK1013_IRQ_NAME,

					trig);

		if (ret) {

			dev_err(&client->dev, "unable to request IRQ\n");

			goto err_trigger_free;

		}



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

		trig->ops = &kxcjk1013_trigger_ops;

		iio_trigger_set_drvdata(trig, indio_dev);

		data->trig = trig;

		indio_dev->trig = trig;



		ret = iio_trigger_register(trig);

		if (ret)

			goto err_trigger_free;



		ret = iio_triggered_buffer_setup(indio_dev,

						&iio_pollfunc_store_time,

						kxcjk1013_trigger_handler,

						NULL);

		if (ret < 0) {

			dev_err(&client->dev,

					"iio triggered buffer setup failed\n");

			goto err_trigger_unregister;

		}

	}



	ret = devm_iio_device_register(&client->dev, indio_dev);

	if (ret < 0) {

		dev_err(&client->dev, "unable to register iio device\n");

		goto err_buffer_cleanup;

	}



	return 0;



err_buffer_cleanup:

	if (data->trig_mode)

		iio_triggered_buffer_cleanup(indio_dev);

err_trigger_unregister:

	if (data->trig_mode)

		iio_trigger_unregister(trig);

err_trigger_free:

	if (data->trig_mode)

		iio_trigger_free(trig);



	return ret;

}



static int kxcjk1013_remove(struct i2c_client *client)

{

	struct iio_dev *indio_dev = i2c_get_clientdata(client);

	struct kxcjk1013_data *data = iio_priv(indio_dev);



	if (data->trig_mode) {

		iio_triggered_buffer_cleanup(indio_dev);

		iio_trigger_unregister(data->trig);

		iio_trigger_free(data->trig);

	}



	mutex_lock(&data->mutex);

	kxcjk1013_set_mode(data, STANDBY);

	mutex_unlock(&data->mutex);



	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int kxcjk1013_suspend(struct device *dev)

{

	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));

	struct kxcjk1013_data *data = iio_priv(indio_dev);



	mutex_lock(&data->mutex);

	kxcjk1013_set_mode(data, STANDBY);

	mutex_unlock(&data->mutex);



	return 0;

}



static int kxcjk1013_resume(struct device *dev)

{

	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));

	struct kxcjk1013_data *data = iio_priv(indio_dev);



	mutex_lock(&data->mutex);



	if (data->power_state)

		kxcjk1013_set_mode(data, OPERATION);



	mutex_unlock(&data->mutex);



	return 0;

}



static SIMPLE_DEV_PM_OPS(kxcjk1013_pm_ops, kxcjk1013_suspend, kxcjk1013_resume);

#define KXCJK1013_PM_OPS (&kxcjk1013_pm_ops)

#else

#define KXCJK1013_PM_OPS NULL

#endif



static const struct acpi_device_id kx_acpi_match[] = {

	{"KXCJ1013", 0},

	{ },

};

MODULE_DEVICE_TABLE(acpi, kx_acpi_match);



static const struct i2c_device_id kxcjk1013_id[] = {

	{"kxcjk1013", 0},

	{}

};



MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);



static struct i2c_driver kxcjk1013_driver = {

	.driver = {

		.name	= KXCJK1013_DRV_NAME,

		.acpi_match_table = ACPI_PTR(kx_acpi_match),

		.pm	= KXCJK1013_PM_OPS,

	},

	.probe		= kxcjk1013_probe,

	.remove		= kxcjk1013_remove,

	.id_table	= kxcjk1013_id,

};

module_i2c_driver(kxcjk1013_driver);



MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");

MODULE_LICENSE("GPL v2");

MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");

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