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Release 4.7 drivers/iio/accel/bma180.c

Directory: drivers/iio/accel
/*
 * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
 *
 * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
 *
 * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net>
 *
 * This file is subject to the terms and conditions of version 2 of
 * the GNU General Public License.  See the file COPYING in the main
 * directory of this archive for more details.
 *
 * SPI is not supported by driver
 * BMA180: 7-bit I2C slave address 0x40 or 0x41
 * BMA250: 7-bit I2C slave address 0x18 or 0x19
 */

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/string.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>


#define BMA180_DRV_NAME "bma180"

#define BMA180_IRQ_NAME "bma180_event"

enum {
	
BMA180,
	
BMA250,
};

struct bma180_data;


struct bma180_part_info {
	
const struct iio_chan_spec *channels;
	
unsigned num_channels;
	
const int *scale_table;
	
unsigned num_scales;
	
const int *bw_table;
	
unsigned num_bw;

	

u8 int_reset_reg, int_reset_mask;
	

u8 sleep_reg, sleep_mask;
	

u8 bw_reg, bw_mask;
	

u8 scale_reg, scale_mask;
	


u8 power_reg, power_mask, lowpower_val;
	

u8 int_enable_reg, int_enable_mask;
	
u8 softreset_reg;

	
int (*chip_config)(struct bma180_data *data);
	
void (*chip_disable)(struct bma180_data *data);
};

/* Register set */

#define BMA180_CHIP_ID		0x00 
/* Need to distinguish BMA180 from other */

#define BMA180_ACC_X_LSB	0x02 
/* First of 6 registers of accel data */

#define BMA180_TEMP		0x08

#define BMA180_CTRL_REG0	0x0d

#define BMA180_RESET		0x10

#define BMA180_BW_TCS		0x20

#define BMA180_CTRL_REG3	0x21

#define BMA180_TCO_Z		0x30

#define BMA180_OFFSET_LSB1	0x35

/* BMA180_CTRL_REG0 bits */

#define BMA180_DIS_WAKE_UP	BIT(0) 
/* Disable wake up mode */

#define BMA180_SLEEP		BIT(1) 
/* 1 - chip will sleep */

#define BMA180_EE_W		BIT(4) 
/* Unlock writing to addr from 0x20 */

#define BMA180_RESET_INT	BIT(6) 
/* Reset pending interrupts */

/* BMA180_CTRL_REG3 bits */

#define BMA180_NEW_DATA_INT	BIT(1) 
/* Intr every new accel data is ready */

/* BMA180_OFFSET_LSB1 skipping mode bit */

#define BMA180_SMP_SKIP		BIT(0)

/* Bit masks for registers bit fields */

#define BMA180_RANGE		0x0e 
/* Range of measured accel values */

#define BMA180_BW		0xf0 
/* Accel bandwidth */

#define BMA180_MODE_CONFIG	0x03 
/* Config operation modes */

/* We have to write this value in reset register to do soft reset */

#define BMA180_RESET_VAL	0xb6


#define BMA180_ID_REG_VAL	0x03

/* Chip power modes */

#define BMA180_LOW_POWER	0x03


#define BMA250_RANGE_REG	0x0f

#define BMA250_BW_REG		0x10

#define BMA250_POWER_REG	0x11

#define BMA250_RESET_REG	0x14

#define BMA250_INT_ENABLE_REG	0x17

#define BMA250_INT_MAP_REG	0x1a

#define BMA250_INT_RESET_REG	0x21


#define BMA250_RANGE_MASK	GENMASK(3, 0) 
/* Range of accel values */

#define BMA250_BW_MASK		GENMASK(4, 0) 
/* Accel bandwidth */

#define BMA250_SUSPEND_MASK	BIT(7) 
/* chip will sleep */

#define BMA250_LOWPOWER_MASK	BIT(6)

#define BMA250_DATA_INTEN_MASK	BIT(4)

#define BMA250_INT1_DATA_MASK	BIT(0)

#define BMA250_INT_RESET_MASK	BIT(7) 
/* Reset pending interrupts */


struct bma180_data {
	
struct i2c_client *client;
	
struct iio_trigger *trig;
	
const struct bma180_part_info *part_info;
	
struct mutex mutex;
	
bool sleep_state;
	
int scale;
	
int bw;
	
bool pmode;
	
u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */
};


enum bma180_chan {
	
AXIS_X,
	
AXIS_Y,
	
AXIS_Z,
	
TEMP
};


static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; 
/* Hz */

static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };


static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250 }; 
/* Hz */

static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
	0, 0, 306458 };




static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
{
	int ret;

	if (data->sleep_state)
		return -EBUSY;

	switch (chan) {
	case TEMP:
		ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
		if (ret < 0)
			dev_err(&data->client->dev, "failed to read temp register\n");
		break;
	default:
		ret = i2c_smbus_read_word_data(data->client,
			BMA180_ACC_X_LSB + chan * 2);
		if (ret < 0)
			dev_err(&data->client->dev,
				"failed to read accel_%c register\n",
				'x' + chan);
	}

	return ret;
}


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peter meerwaldpeter meerwald5046.30%266.67%


Total108100.00%3100.00%






static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
{
	int ret = i2c_smbus_read_byte_data(data->client, reg);
	u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));

	if (ret < 0)
		return ret;

	return i2c_smbus_write_byte_data(data->client, reg, reg_val);
}


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static int bma180_reset_intr(struct bma180_data *data)
{
	int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
		data->part_info->int_reset_mask, 1);

	if (ret)
		dev_err(&data->client->dev, "failed to reset interrupt\n");

	return ret;
}


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peter meerwaldpeter meerwald1019.23%150.00%


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static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
{
	int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
			data->part_info->int_enable_mask, state);
	if (ret)
		goto err;
	ret = bma180_reset_intr(data);
	if (ret)
		goto err;

	return 0;

err:
	dev_err(&data->client->dev,
		"failed to set new data interrupt state %d\n", state);
	return ret;
}


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peter meerwaldpeter meerwald1316.46%266.67%


Total79100.00%3100.00%






static int bma180_set_sleep_state(struct bma180_data *data, bool state)
{
	int ret = bma180_set_bits(data, data->part_info->sleep_reg,
		data->part_info->sleep_mask, state);

	if (ret) {
		dev_err(&data->client->dev,
			"failed to set sleep state %d\n", state);
		return ret;
	}
	data->sleep_state = state;

	return 0;
}


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static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
{
	int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);

	if (ret)
		dev_err(&data->client->dev,
			"failed to set ee writing state %d\n", state);

	return ret;
}


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static int bma180_set_bw(struct bma180_data *data, int val)
{
	int ret, i;

	if (data->sleep_state)
		return -EBUSY;

	for (i = 0; i < data->part_info->num_bw; ++i) {
		if (data->part_info->bw_table[i] == val) {
			ret = bma180_set_bits(data, data->part_info->bw_reg,
				data->part_info->bw_mask, i);
			if (ret) {
				dev_err(&data->client->dev,
					"failed to set bandwidth\n");
				return ret;
			}
			data->bw = val;
			return 0;
		}
	}

	return -EINVAL;
}


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Total118100.00%3100.00%






static int bma180_set_scale(struct bma180_data *data, int val)
{
	int ret, i;

	if (data->sleep_state)
		return -EBUSY;

	for (i = 0; i < data->part_info->num_scales; ++i)
		if (data->part_info->scale_table[i] == val) {
			ret = bma180_set_bits(data, data->part_info->scale_reg,
				data->part_info->scale_mask, i);
			if (ret) {
				dev_err(&data->client->dev,
					"failed to set scale\n");
				return ret;
			}
			data->scale = val;
			return 0;
		}

	return -EINVAL;
}


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static int bma180_set_pmode(struct bma180_data *data, bool mode)
{
	u8 reg_val = mode ? data->part_info->lowpower_val : 0;
	int ret = bma180_set_bits(data, data->part_info->power_reg,
		data->part_info->power_mask, reg_val);

	if (ret) {
		dev_err(&data->client->dev, "failed to set power mode\n");
		return ret;
	}
	data->pmode = mode;

	return 0;
}


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static int bma180_soft_reset(struct bma180_data *data)
{
	int ret = i2c_smbus_write_byte_data(data->client,
		data->part_info->softreset_reg, BMA180_RESET_VAL);

	if (ret)
		dev_err(&data->client->dev, "failed to reset the chip\n");

	return ret;
}


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peter meerwaldpeter meerwald510.42%150.00%


Total48100.00%2100.00%






static int bma180_chip_init(struct bma180_data *data)
{
	/* Try to read chip_id register. It must return 0x03. */
	int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);

	if (ret < 0)
		return ret;
	if (ret != BMA180_ID_REG_VAL)
		return -ENODEV;

	ret = bma180_soft_reset(data);
	if (ret)
		return ret;
	/*
         * No serial transaction should occur within minimum 10 us
         * after soft_reset command
         */
	msleep(20);

	ret = bma180_set_new_data_intr_state(data, false);
	if (ret)
		return ret;

	return bma180_set_pmode(data, false);
}


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static int bma180_chip_config(struct bma180_data *data)
{
	int ret = bma180_chip_init(data);

	if (ret)
		goto err;
	ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
	if (ret)
		goto err;
	ret = bma180_set_ee_writing_state(data, true);
	if (ret)
		goto err;
	ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
	if (ret)
		goto err;
	ret = bma180_set_bw(data, 20); /* 20 Hz */
	if (ret)
		goto err;
	ret = bma180_set_scale(data, 2452); /* 2 G */
	if (ret)
		goto err;

	return 0;

err:
	dev_err(&data->client->dev, "failed to config the chip\n");
	return ret;
}


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static int bma250_chip_config(struct bma180_data *data)
{
	int ret = bma180_chip_init(data);

	if (ret)
		goto err;
	ret = bma180_set_bw(data, 16); /* 16 Hz */
	if (ret)
		goto err;
	ret = bma180_set_scale(data, 38344); /* 2 G */
	if (ret)
		goto err;
	ret = bma180_set_bits(data, BMA250_INT_MAP_REG,
		BMA250_INT1_DATA_MASK, 1);
	if (ret)
		goto err;

	return 0;

err:
	dev_err(&data->client->dev, "failed to config the chip\n");
	return ret;
}


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static void bma180_chip_disable(struct bma180_data *data)
{
	if (bma180_set_new_data_intr_state(data, false))
		goto err;
	if (bma180_set_ee_writing_state(data, false))
		goto err;
	if (bma180_set_sleep_state(data, true))
		goto err;

	return;

err:
	dev_err(&data->client->dev, "failed to disable the chip\n");
}


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static void bma250_chip_disable(struct bma180_data *data)
{
	if (bma180_set_new_data_intr_state(data, false))
		goto err;
	if (bma180_set_sleep_state(data, true))
		goto err;

	return;

err:
	dev_err(&data->client->dev, "failed to disable the chip\n");
}


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static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned n,
				 bool micros)
{
	size_t len = 0;
	int i;

	for (i = 0; i < n; i++) {
		if (!vals[i])
			continue;
		len += scnprintf(buf + len, PAGE_SIZE - len,
			micros ? "0.%06d " : "%d ", vals[i]);
	}
	buf[len - 1] = '\n';

	return len;
}


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static ssize_t bma180_show_filter_freq_avail(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));

	return bma180_show_avail(buf, data->part_info->bw_table,
		data->part_info->num_bw, false);
}


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static ssize_t bma180_show_scale_avail(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));

	return bma180_show_avail(buf, data->part_info->scale_table,
		data->part_info->num_scales, true);
}


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static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
	S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);

static IIO_DEVICE_ATTR(in_accel_scale_available,
	S_IRUGO, bma180_show_scale_avail, NULL, 0);


static struct attribute *bma180_attributes[] = {
	&iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
		dev_attr.attr,
	&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
	NULL,
};


static const struct attribute_group bma180_attrs_group = {
	.attrs = bma180_attributes,
};




static int bma180_read_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const *chan, int *val, int *val2,
		long mask)
{
	struct bma180_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)) {
			mutex_unlock(&data->mutex);
			return -EBUSY;
		}
		ret = bma180_get_data_reg(data, chan->scan_index);
		mutex_unlock(&data->mutex);
		if (ret < 0)
			return ret;
		*val = sign_extend32(ret >> chan->scan_type.shift,
			chan->scan_type.realbits - 1);
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
		*val = data->bw;
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_ACCEL:
			*val = 0;
			*val2 = data->scale;
			return IIO_VAL_INT_PLUS_MICRO;
		case IIO_TEMP:
			*val = 500;
			return IIO_VAL_INT;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_OFFSET:
		*val = 48; /* 0 LSB @ 24 degree C */
		return IIO_VAL_INT;
	default:
		return -EINVAL;
	}
}


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Total207100.00%2100.00%






static int bma180_write_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const *chan, int val, int val2, long mask)
{
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	switch (mask) {
	case IIO_CHAN_INFO_SCALE:
		if (val)
			return -EINVAL;
		mutex_lock(&data->mutex);
		ret = bma180_set_scale(data, val2);
		mutex_unlock(&data->mutex);
		return ret;
	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
		if (val2)
			return -EINVAL;
		mutex_lock(&data->mutex);
		ret = bma180_set_bw(data, val);
		mutex_unlock(&data->mutex);
		return ret;
	default:
		return -EINVAL;
	}
}


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static const struct iio_info bma180_info = {
	.attrs			= &bma180_attrs_group,
	.read_raw		= bma180_read_raw,
	.write_raw		= bma180_write_raw,
	.driver_module		= THIS_MODULE,
};


static const char * const bma180_power_modes[] = { "low_noise", "low_power" };




static int bma180_get_power_mode(struct iio_dev *indio_dev,
		const struct iio_chan_spec *chan)
{
	struct bma180_data *data = iio_priv(indio_dev);

	return data->pmode;
}


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static int bma180_set_power_mode(struct iio_dev *indio_dev,
		const struct iio_chan_spec *chan, unsigned int mode)
{
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	mutex_lock(&data->mutex);
	ret = bma180_set_pmode(data, mode);
	mutex_unlock(&data->mutex);

	return ret;
}


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static const struct iio_enum bma180_power_mode_enum = {
	.items = bma180_power_modes,
	.num_items = ARRAY_SIZE(bma180_power_modes),
	.get = bma180_get_power_mode,
	.set = bma180_set_power_mode,
};


static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
	IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
	IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
	{ },
};


#define BMA180_ACC_CHANNEL(_axis, _bits) {                               \
        .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_LOW_PASS_FILTER_3DB_FREQUENCY),       \
        .scan_index = AXIS_##_axis,                                     \
        .scan_type = {                                                  \
                .sign = 's',                                            \
                .realbits = _bits,                                      \
                .storagebits = 16,                                      \
                .shift = 16 - _bits,                                    \
        },                                                              \
        .ext_info = bma180_ext_info,                                    \
}


#define BMA180_TEMP_CHANNEL {                                               \
        .type = IIO_TEMP,                                               \
        .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |                  \
                BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),   \
        .scan_index = TEMP,                                             \
        .scan_type = {                                                  \
                .sign = 's',                                            \
                .realbits = 8,                                          \
                .storagebits = 16,                                      \
        },                                                              \
}


static const struct iio_chan_spec bma180_channels[] = {
	BMA180_ACC_CHANNEL(X, 14),
	BMA180_ACC_CHANNEL(Y, 14),
	BMA180_ACC_CHANNEL(Z, 14),
	BMA180_TEMP_CHANNEL,
	IIO_CHAN_SOFT_TIMESTAMP(4),
};


static const struct iio_chan_spec bma250_channels[] = {
	BMA180_ACC_CHANNEL(X, 10),
	BMA180_ACC_CHANNEL(Y, 10),
	BMA180_ACC_CHANNEL(Z, 10),
	BMA180_TEMP_CHANNEL,
	IIO_CHAN_SOFT_TIMESTAMP(4),
};


static const struct bma180_part_info bma180_part_info[] = {
	[BMA180] = {
		bma180_channels, ARRAY_SIZE(bma180_channels),
		bma180_scale_table, ARRAY_SIZE(bma180_scale_table),
		bma180_bw_table, ARRAY_SIZE(bma180_bw_table),
		BMA180_CTRL_REG0, BMA180_RESET_INT,
		BMA180_CTRL_REG0, BMA180_SLEEP,
		BMA180_BW_TCS, BMA180_BW,
		BMA180_OFFSET_LSB1, BMA180_RANGE,
		BMA180_TCO_Z, BMA180_MODE_CONFIG, BMA180_LOW_POWER,
		BMA180_CTRL_REG3, BMA180_NEW_DATA_INT,
		BMA180_RESET,
		bma180_chip_config,
		bma180_chip_disable,
        },
	[BMA250] = {
		bma250_channels, ARRAY_SIZE(bma250_channels),
		bma250_scale_table, ARRAY_SIZE(bma250_scale_table),
		bma250_bw_table, ARRAY_SIZE(bma250_bw_table),
		BMA250_INT_RESET_REG, BMA250_INT_RESET_MASK,
		BMA250_POWER_REG, BMA250_SUSPEND_MASK,
		BMA250_BW_REG, BMA250_BW_MASK,
		BMA250_RANGE_REG, BMA250_RANGE_MASK,
		BMA250_POWER_REG, BMA250_LOWPOWER_MASK, 1,
		BMA250_INT_ENABLE_REG, BMA250_DATA_INTEN_MASK,
		BMA250_RESET_REG,
		bma250_chip_config,
		bma250_chip_disable,
        },
};




static irqreturn_t bma180_trigger_handler(int irq, void *p)
{
	struct iio_poll_func *pf = p;
	struct iio_dev *indio_dev = pf->indio_dev;
	struct bma180_data *data = iio_priv(indio_dev);
	int64_t time_ns = iio_get_time_ns();
	int bit, ret, i = 0;

	mutex_lock(&data->mutex);

	for_each_set_bit(bit, indio_dev->active_scan_mask,
			 indio_dev->masklength) {
		ret = bma180_get_data_reg(data, bit);
		if (ret < 0) {
			mutex_unlock(&data->mutex);
			goto err;
		}
		((s16 *)data->buff)[i++] = ret;
	}

	mutex_unlock(&data->mutex);

	iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns);
err:
	iio_trigger_notify_done(indio_dev->trig);

	return IRQ_HANDLED;
}


Contributors
PersonTokensPropCommitsCommitProp
oleksandr kravchenkooleksandr kravchenko13692.52%125.00%


lars-peter clausenlars-peter clausen96.12%125.00%


peter meerwaldpeter meerwald10.68%125.00%


octavian purdilaoctavian purdila10.68%125.00%


Total147100.00%4100.00%






static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
		bool state)
{
	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
	struct bma180_data *data = iio_priv(indio_dev);

	return bma180_set_new_data_intr_state(data, state);
}


Contributors
PersonTokensPropCommitsCommitProp
oleksandr kravchenkooleksandr kravchenko42100.00%1100.00%


Total42100.00%1100.00%






static int bma180_trig_try_reen(struct iio_trigger *trig)
{
	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
	struct bma180_data *data = iio_priv(indio_dev);

	return bma180_reset_intr(data);
}


Contributors
PersonTokensPropCommitsCommitProp
oleksandr kravchenkooleksandr kravchenko37100.00%1100.00%


Total37100.00%1100.00%




static const struct iio_trigger_ops bma180_trigger_ops = {
	.set_trigger_state = bma180_data_rdy_trigger_set_state,
	.try_reenable = bma180_trig_try_reen,
	.owner = THIS_MODULE,
};




static int bma180_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
{
	struct bma180_data *data;
	struct iio_dev *indio_dev;
	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;
	data->part_info = &bma180_part_info[id->driver_data];

	ret = data->part_info->chip_config(data);
	if (ret < 0)
		goto err_chip_disable;

	mutex_init(&data->mutex);
	indio_dev->dev.parent = &client->dev;
	indio_dev->channels = data->part_info->channels;
	indio_dev->num_channels = data->part_info->num_channels;
	indio_dev->name = id->name;
	indio_dev->modes = INDIO_DIRECT_MODE;
	indio_dev->info = &bma180_info;

	if (client->irq > 0) {
		data->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
			indio_dev->id);
		if (!data->trig) {
			ret = -ENOMEM;
			goto err_chip_disable;
		}

		ret = devm_request_irq(&client->dev, client->irq,
			iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
			"bma180_event", data->trig);
		if (ret) {
			dev_err(&client->dev, "unable to request IRQ\n");
			goto err_trigger_free;
		}

		data->trig->dev.parent = &client->dev;
		data->trig->ops = &bma180_trigger_ops;
		iio_trigger_set_drvdata(data->trig, indio_dev);
		indio_dev->trig = iio_trigger_get(data->trig);

		ret = iio_trigger_register(data->trig);
		if (ret)
			goto err_trigger_free;
	}

	ret = iio_triggered_buffer_setup(indio_dev, NULL,
			bma180_trigger_handler, NULL);
	if (ret < 0) {
		dev_err(&client->dev, "unable to setup iio triggered buffer\n");
		goto err_trigger_unregister;
	}

	ret = iio_device_register(indio_dev);
	if (ret < 0) {
		dev_err(&client->dev, "unable to register iio device\n");
		goto err_buffer_cleanup;
	}

	return 0;

err_buffer_cleanup:
	iio_triggered_buffer_cleanup(indio_dev);
err_trigger_unregister:
	if (data->trig)
		iio_trigger_unregister(data->trig);
err_trigger_free:
	iio_trigger_free(data->trig);
err_chip_disable:
	data->part_info->chip_disable(data);

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
oleksandr kravchenkooleksandr kravchenko34782.23%114.29%


peter meerwaldpeter meerwald7016.59%457.14%


srinivas pandruvadasrinivas pandruvada30.71%114.29%


greg kroah-hartmangreg kroah-hartman20.47%114.29%


Total422100.00%7100.00%






static int bma180_remove(struct i2c_client *client)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(client);
	struct bma180_data *data = iio_priv(indio_dev);

	iio_device_unregister(indio_dev);
	iio_triggered_buffer_cleanup(indio_dev);
	if (data->trig) {
		iio_trigger_unregister(data->trig);
		iio_trigger_free(data->trig);
	}

	mutex_lock(&data->mutex);
	data->part_info->chip_disable(data);
	mutex_unlock(&data->mutex);

	return 0;
}


Contributors
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oleksandr kravchenkooleksandr kravchenko7885.71%133.33%


peter meerwaldpeter meerwald1314.29%266.67%


Total91100.00%3100.00%



#ifdef CONFIG_PM_SLEEP



static int bma180_suspend(struct device *dev)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	mutex_lock(&data->mutex);
	ret = bma180_set_sleep_state(data, true);
	mutex_unlock(&data->mutex);

	return ret;
}


Contributors
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oleksandr kravchenkooleksandr kravchenko6092.31%133.33%


peter meerwaldpeter meerwald57.69%266.67%


Total65100.00%3100.00%






static int bma180_resume(struct device *dev)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	mutex_lock(&data->mutex);
	ret = bma180_set_sleep_state(data, false);
	mutex_unlock(&data->mutex);

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
oleksandr kravchenkooleksandr kravchenko6092.31%133.33%


peter meerwaldpeter meerwald57.69%266.67%


Total65100.00%3100.00%



static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);

#define BMA180_PM_OPS (&bma180_pm_ops)
#else

#define BMA180_PM_OPS NULL
#endif


static struct i2c_device_id bma180_ids[] = {
	{ "bma180", BMA180 },
	{ "bma250", BMA250 },
	{ }
};

MODULE_DEVICE_TABLE(i2c, bma180_ids);


static struct i2c_driver bma180_driver = {
	.driver = {
		.name	= "bma180",
		.pm	= BMA180_PM_OPS,
        },
	.probe		= bma180_probe,
	.remove		= bma180_remove,
	.id_table	= bma180_ids,
};


module_i2c_driver(bma180_driver);

MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
MODULE_AUTHOR("Texas Instruments, Inc.");
MODULE_DESCRIPTION("Bosch BMA180/BMA250 triaxial acceleration sensor");
MODULE_LICENSE("GPL");

Overall Contributors
PersonTokensPropCommitsCommitProp
oleksandr kravchenkooleksandr kravchenko252568.17%15.00%


peter meerwaldpeter meerwald116431.43%1575.00%


lars-peter clausenlars-peter clausen90.24%15.00%


srinivas pandruvadasrinivas pandruvada30.08%15.00%


greg kroah-hartmangreg kroah-hartman20.05%15.00%


octavian purdilaoctavian purdila10.03%15.00%


Total3704100.00%20100.00%

  
Directory: drivers/iio/accel



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