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Commit 1a4fbf6a authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Jonathan Cameron
Browse files

iio: accel: kxcjk1013 3-axis accelerometer driver 

This patch adds IIO driver for KXCJK 1013 triaxis accelerometer sensor.
The specifications for this driver is downloaded from:
http://www.kionix.com/sites/default/files/KXCJK-1013%20Specifications%20Rev%202.pdf



Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 398fd22b

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
+760 −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)

				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)

			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");

include/linux/iio/accel/kxcjk_1013.h

0 → 100644
+22 −0
Original line number Diff line number Diff line 
/*

 * KXCJK-1013 3-axis accelerometer Interface

 * 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.

 */



#ifndef __IIO_KXCJK_1013_H__

#define __IIO_KXCJK_1013_H__



struct kxcjk_1013_platform_data {

	bool active_high_intr;

};



#endif