--- /dev/null
+/*
+ * 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;
+}
+
+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);
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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);
+}
+
+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;
+}
+
+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;
+}
+
+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");
+}
+
+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");
+}
+
+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;
+}
+
+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);
+}
+
+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);
+}
+
+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;
+ }
+}
+
+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;
+ }
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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);
+}
+
+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);
+}
+
+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;
+}
+
+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;
+}
+
+#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;
+}
+
+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;
+}
+
+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",
+ .owner = THIS_MODULE,
+ .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");
Code Review / kvmfornfv.git / blobdiff