Re: [PATCH 17/20] iio: bmc150: Use i2c regmap

From: Markus Pargmann
Date: Mon Aug 17 2015 - 03:49:48 EST

On Sat, Aug 15, 2015 at 02:27:47PM +0100, Jonathan Cameron wrote:
> On 12/08/15 11:12, Markus Pargmann wrote:
> > This replaces all usage of direct i2c accesses with regmap accesses.
> >
> > Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
> Clearly there is some work needed on the earlier patches and this
> might change as a result (particularly the fifo read). I'll review
> as is however..
>
> Few bits on top of what other reviews have highlighted...
>
> Jonathan
> > ---
> > drivers/iio/accel/Kconfig | 2 +
> > drivers/iio/accel/bmc150-accel.c | 225 +++++++++++++++++----------------------
> > 2 files changed, 101 insertions(+), 126 deletions(-)
> >
> > diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
> > index 00e7bcbdbe24..01dd03d194d1 100644
> > --- a/drivers/iio/accel/Kconfig
> > +++ b/drivers/iio/accel/Kconfig
> > @@ -22,6 +22,8 @@ config BMC150_ACCEL
> > depends on I2C
> > select IIO_BUFFER
> > select IIO_TRIGGERED_BUFFER
> > + select REGMAP
> > + select REGMAP_I2C
> > help
> > Say yes here to build support for the following Bosch accelerometers:
> > BMC150, BMI055, BMA250E, BMA222E, BMA255, BMA280.
> > diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
> > index fe2d2316158f..1484e956482e 100644
> > --- a/drivers/iio/accel/bmc150-accel.c
> > +++ b/drivers/iio/accel/bmc150-accel.c
> > @@ -35,6 +35,7 @@
> > #include <linux/iio/trigger.h>
> > #include <linux/iio/trigger_consumer.h>
> > #include <linux/iio/triggered_buffer.h>
> > +#include <linux/regmap.h>
> >
> > #define BMC150_ACCEL_DRV_NAME "bmc150_accel"
> > #define BMC150_ACCEL_IRQ_NAME "bmc150_accel_event"
> > @@ -185,6 +186,8 @@ enum bmc150_accel_trigger_id {
> >
> > struct bmc150_accel_data {
> > struct i2c_client *client;
> > + struct regmap *regmap;
> > + struct device *dev;
> > struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
> > atomic_t active_intr;
> > struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
> > @@ -241,6 +244,14 @@ static const struct {
> > {500000, BMC150_ACCEL_SLEEP_500_MS},
> > {1000000, BMC150_ACCEL_SLEEP_1_SEC} };
> >
> > +static const struct regmap_config bmc150_i2c_regmap_conf = {
> > + .reg_bits = 8,
> > + .val_bits = 8,
> > + .max_register = 0x3f,
> > +
> > + .use_single_rw = false,
> > + .cache_type = REGCACHE_NONE,
> > +};
> >
> > static int bmc150_accel_set_mode(struct bmc150_accel_data *data,
> > enum bmc150_power_modes mode,
> > @@ -270,8 +281,7 @@ static int bmc150_accel_set_mode(struct bmc150_accel_data *data,
> >
> > dev_dbg(&data->client->dev, "Set Mode bits %x\n", lpw_bits);
> >
> > - ret = i2c_smbus_write_byte_data(data->client,
> > - BMC150_ACCEL_REG_PMU_LPW, lpw_bits);
> > + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_LPW, lpw_bits);
> > if (ret < 0) {
> > dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n");
> > return ret;
> > @@ -289,8 +299,7 @@ static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val,
> > for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) {
> > if (bmc150_accel_samp_freq_table[i].val == val &&
> > bmc150_accel_samp_freq_table[i].val2 == val2) {
> > - ret = i2c_smbus_write_byte_data(
> > - data->client,
> > + ret = regmap_write(data->regmap,
> > BMC150_ACCEL_REG_PMU_BW,
> > bmc150_accel_samp_freq_table[i].bw_bits);
> > if (ret < 0)
> > @@ -307,26 +316,19 @@ static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val,
> >
> > static int bmc150_accel_update_slope(struct bmc150_accel_data *data)
> > {
> > - int ret, val;
> > + int ret;
> >
> > - ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_6,
> > + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_6,
> > data->slope_thres);
> > if (ret < 0) {
> > dev_err(&data->client->dev, "Error writing reg_int_6\n");
> > return ret;
> > }
> >
> > - ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5);
> > + ret = regmap_update_bits(data->regmap, BMC150_ACCEL_REG_INT_5,
> > + BMC150_ACCEL_SLOPE_DUR_MASK, data->slope_dur);
> > if (ret < 0) {
> > - dev_err(&data->client->dev, "Error reading reg_int_5\n");
> > - return ret;
> > - }
> > -
> > - val = (ret & ~BMC150_ACCEL_SLOPE_DUR_MASK) | data->slope_dur;
> > - ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_5,
> > - val);
> > - if (ret < 0) {
> > - dev_err(&data->client->dev, "Error write reg_int_5\n");
> > + dev_err(&data->client->dev, "Error updating reg_int_5\n");
> > return ret;
> > }
> >
> > @@ -348,17 +350,18 @@ static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t,
> > static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
> > {
> > int ret;
> > + unsigned int val;
> >
> > - ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_CHIP_ID);
> > + ret = regmap_read(data->regmap, BMC150_ACCEL_REG_CHIP_ID, &val);
> > if (ret < 0) {
> > dev_err(&data->client->dev,
> > "Error: Reading chip id\n");
> > return ret;
> > }
> >
> > - dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
> > - if (ret != data->chip_info->chip_id) {
> > - dev_err(&data->client->dev, "Invalid chip %x\n", ret);
> > + dev_dbg(&data->client->dev, "Chip Id %x\n", val);
> > + if (val != data->chip_info->chip_id) {
> > + dev_err(&data->client->dev, "Invalid chip %x\n", val);
> > return -ENODEV;
> > }
> >
> > @@ -372,9 +375,8 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
> > return ret;
> >
> > /* Set Default Range */
> > - ret = i2c_smbus_write_byte_data(data->client,
> > - BMC150_ACCEL_REG_PMU_RANGE,
> > - BMC150_ACCEL_DEF_RANGE_4G);
> > + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_RANGE,
> > + BMC150_ACCEL_DEF_RANGE_4G);
> > if (ret < 0) {
> > dev_err(&data->client->dev,
> > "Error writing reg_pmu_range\n");
> > @@ -391,10 +393,9 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
> > return ret;
> >
> > /* Set default as latched interrupts */
> > - ret = i2c_smbus_write_byte_data(data->client,
> > - BMC150_ACCEL_REG_INT_RST_LATCH,
> > - BMC150_ACCEL_INT_MODE_LATCH_INT |
> > - BMC150_ACCEL_INT_MODE_LATCH_RESET);
> > + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH,
> > + BMC150_ACCEL_INT_MODE_LATCH_INT |
> > + BMC150_ACCEL_INT_MODE_LATCH_RESET);
> > if (ret < 0) {
> > dev_err(&data->client->dev,
> > "Error writing reg_int_rst_latch\n");
> > @@ -527,38 +528,18 @@ static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i,
> > return ret;
> >
> > /* map the interrupt to the appropriate pins */
> > - ret = i2c_smbus_read_byte_data(data->client, info->map_reg);
> > - if (ret < 0) {
> > - dev_err(&data->client->dev, "Error reading reg_int_map\n");
> > - goto out_fix_power_state;
> > - }
> > - if (state)
> > - ret |= info->map_bitmask;
> > - else
> > - ret &= ~info->map_bitmask;
> > -
> > - ret = i2c_smbus_write_byte_data(data->client, info->map_reg,
> > - ret);
> > + ret = regmap_update_bits(data->regmap, info->map_reg, info->map_bitmask,
> > + (state ? info->map_bitmask : 0));
> > if (ret < 0) {
> > - dev_err(&data->client->dev, "Error writing reg_int_map\n");
> > + dev_err(&data->client->dev, "Error updating reg_int_map\n");
> > goto out_fix_power_state;
> > }
> >
> > /* enable/disable the interrupt */
> > - ret = i2c_smbus_read_byte_data(data->client, info->en_reg);
> > - if (ret < 0) {
> > - dev_err(&data->client->dev, "Error reading reg_int_en\n");
> > - goto out_fix_power_state;
> > - }
> > -
> > - if (state)
> > - ret |= info->en_bitmask;
> > - else
> > - ret &= ~info->en_bitmask;
> > -
> > - ret = i2c_smbus_write_byte_data(data->client, info->en_reg, ret);
> > + ret = regmap_update_bits(data->regmap, info->en_reg, info->en_bitmask,
> > + (state ? info->en_bitmask : 0));
> > if (ret < 0) {
> > - dev_err(&data->client->dev, "Error writing reg_int_en\n");
> > + dev_err(&data->client->dev, "Error updating reg_int_en\n");
> > goto out_fix_power_state;
> > }
> >
> > @@ -581,8 +562,7 @@ static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val)
> >
> > for (i = 0; i < ARRAY_SIZE(data->chip_info->scale_table); ++i) {
> > if (data->chip_info->scale_table[i].scale == val) {
> > - ret = i2c_smbus_write_byte_data(
> > - data->client,
> > + ret = regmap_write(data->regmap,
> > BMC150_ACCEL_REG_PMU_RANGE,
> > data->chip_info->scale_table[i].reg_range);
> > if (ret < 0) {
> > @@ -602,16 +582,17 @@ static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val)
> > static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val)
> > {
> > int ret;
> > + unsigned int value;
> >
> > mutex_lock(&data->mutex);
> >
> > - ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_TEMP);
> > + ret = regmap_read(data->regmap, BMC150_ACCEL_REG_TEMP, &value);
> > if (ret < 0) {
> > dev_err(&data->client->dev, "Error reading reg_temp\n");
> > mutex_unlock(&data->mutex);
> > return ret;
> > }
> > - *val = sign_extend32(ret, 7);
> > + *val = sign_extend32(value, 7);
> >
> > mutex_unlock(&data->mutex);
> >
> > @@ -624,6 +605,7 @@ static int bmc150_accel_get_axis(struct bmc150_accel_data *data,
> > {
> > int ret;
> > int axis = chan->scan_index;
> > + unsigned int raw_val;
> >
> > mutex_lock(&data->mutex);
> > ret = bmc150_accel_set_power_state(data, true);
> > @@ -632,15 +614,15 @@ static int bmc150_accel_get_axis(struct bmc150_accel_data *data,
> > return ret;
> > }
> >
> > - ret = i2c_smbus_read_word_data(data->client,
> > - BMC150_ACCEL_AXIS_TO_REG(axis));
> > + ret = regmap_bulk_read(data->regmap, BMC150_ACCEL_AXIS_TO_REG(axis),
> > + &raw_val, 2);
> > if (ret < 0) {
> > dev_err(&data->client->dev, "Error reading axis %d\n", axis);
> > bmc150_accel_set_power_state(data, false);
> > mutex_unlock(&data->mutex);
> > return ret;
> > }
> > - *val = sign_extend32(ret >> chan->scan_type.shift,
> > + *val = sign_extend32(raw_val >> chan->scan_type.shift,
> > chan->scan_type.realbits - 1);
> > ret = bmc150_accel_set_power_state(data, false);
> > mutex_unlock(&data->mutex);
> > @@ -904,52 +886,37 @@ static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val)
> > * We must read at least one full frame in one burst, otherwise the rest of the
> > * frame data is discarded.
> > */
> > -static int bmc150_accel_fifo_transfer(const struct i2c_client *client,
> > +static int bmc150_accel_fifo_transfer(struct bmc150_accel_data *data,
> > char *buffer, int samples)
> > {
> > int sample_length = 3 * 2;
> > - u8 reg_fifo_data = BMC150_ACCEL_REG_FIFO_DATA;
> > - int ret = -EIO;
> > -
> > - if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
> > - struct i2c_msg msg[2] = {
> > - {
> > - .addr = client->addr,
> > - .flags = 0,
> > - .buf = &reg_fifo_data,
> > - .len = sizeof(reg_fifo_data),
> > - },
> > - {
> > - .addr = client->addr,
> > - .flags = I2C_M_RD,
> > - .buf = (u8 *)buffer,
> > - .len = samples * sample_length,
> > - }
> > - };
> > + int ret;
> > + int total_length = samples * sample_length;
> > + int i, step;
> >
> > - ret = i2c_transfer(client->adapter, msg, 2);
> > - if (ret != 2)
> > - ret = -EIO;
> > - else
> > - ret = 0;
> > - } else {
> > - int i, step = I2C_SMBUS_BLOCK_MAX / sample_length;
> > -
> > - for (i = 0; i < samples * sample_length; i += step) {
> > - ret = i2c_smbus_read_i2c_block_data(client,
> > - reg_fifo_data, step,
> > - &buffer[i]);
> > - if (ret != step) {
> > - ret = -EIO;
> > - break;
> > - }
> > + ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA, buffer,
> > + total_length);
> > + if (ret != -E2BIG) {
> > + if (ret)
> I'd invert the logic for more readability.
>
> if (ret == -E2BIT) {
> ...
> } else if (ret) {
> ...
> } else {
> return ret;
> }

Okay.

> > + dev_err(data->dev, "Error transferring data from fifo\n");
> > + return ret;
> > + }
> >
> > - ret = 0;
> > - }
> > + /*
> > + * Seems we have a bus with size limitation so we have to execute
> > + * multiple reads
> > + */
> Can we not just query this in advance before going through the previous
> failed call? THat would be cleaner to my mind.

Yes we can check that in advance and make the reads accordingly.
>
> > + step = regmap_get_raw_io_max(data->regmap) / sample_length;
> > + for (i = -1; i < samples * sample_length; i += step) {
> > + ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA,
> > + &buffer[i], step);
> umm. Can't say I like the negative index into buffer. Why is it
> necessary?

No this is an error, thanks.

> > + if (ret)
> > + break;
> > }
> >
> > if (ret)
> > - dev_err(&client->dev, "Error transferring data from fifo\n");
> > + dev_err(data->dev, "Error transferring data from fifo in single steps of %zu\n",
>
> multiple steps of %zu perhaps?

Yes.

> > + step);
> >
> > return ret;
> > }
> > @@ -963,14 +930,15 @@ static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev,
> > u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];
> > int64_t tstamp;
> > uint64_t sample_period;
> > - ret = i2c_smbus_read_byte_data(data->client,
> > - BMC150_ACCEL_REG_FIFO_STATUS);
> > + unsigned int val;
> > +
> > + ret = regmap_read(data->regmap, BMC150_ACCEL_REG_FIFO_STATUS, &val);
> > if (ret < 0) {
> > dev_err(&data->client->dev, "Error reading reg_fifo_status\n");
> > return ret;
> > }
> >
> > - count = ret & 0x7F;
> > + count = val & 0x7F;
> >
> > if (!count)
> > return 0;
> > @@ -1009,7 +977,7 @@ static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev,
> > if (samples && count > samples)
> > count = samples;
> >
> > - ret = bmc150_accel_fifo_transfer(data->client, (u8 *)buffer, count);
> > + ret = bmc150_accel_fifo_transfer(data, (u8 *)buffer, count);
> > if (ret)
> > return ret;
> >
> > @@ -1206,17 +1174,19 @@ static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p)
> > struct iio_dev *indio_dev = pf->indio_dev;
> > struct bmc150_accel_data *data = iio_priv(indio_dev);
> > int bit, ret, i = 0;
> > + unsigned int raw_val;
> >
> > mutex_lock(&data->mutex);
> > for_each_set_bit(bit, indio_dev->active_scan_mask,
> > indio_dev->masklength) {
> > - ret = i2c_smbus_read_word_data(data->client,
> > - BMC150_ACCEL_AXIS_TO_REG(bit));
> > + ret = regmap_bulk_read(data->regmap,
> > + BMC150_ACCEL_AXIS_TO_REG(bit), &raw_val,
> > + 2);
> Is using a variable on the stack not going to cause issues when we add
> SPI? (cacheline dma requirements).

Good question. Just looked it up. regmap uses spi_write_then_read which
uses its own buffer and copies the result back to the receive buffer at
the end. So this shouldn't be a problem.

Thanks,

Markus

> > if (ret < 0) {
> > mutex_unlock(&data->mutex);
> > goto err_read;
> > }
> > - data->buffer[i++] = ret;
> > + data->buffer[i++] = raw_val;
> > }
> > mutex_unlock(&data->mutex);
> >
> > @@ -1240,10 +1210,9 @@ static int bmc150_accel_trig_try_reen(struct iio_trigger *trig)
> >
> > mutex_lock(&data->mutex);
> > /* clear any latched interrupt */
> > - ret = i2c_smbus_write_byte_data(data->client,
> > - BMC150_ACCEL_REG_INT_RST_LATCH,
> > - BMC150_ACCEL_INT_MODE_LATCH_INT |
> > - BMC150_ACCEL_INT_MODE_LATCH_RESET);
> > + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH,
> > + BMC150_ACCEL_INT_MODE_LATCH_INT |
> > + BMC150_ACCEL_INT_MODE_LATCH_RESET);
> > mutex_unlock(&data->mutex);
> > if (ret < 0) {
> > dev_err(&data->client->dev,
> > @@ -1300,34 +1269,34 @@ static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev)
> > struct bmc150_accel_data *data = iio_priv(indio_dev);
> > int dir;
> > int ret;
> > + unsigned int val;
> >
> > - ret = i2c_smbus_read_byte_data(data->client,
> > - BMC150_ACCEL_REG_INT_STATUS_2);
> > + ret = regmap_read(data->regmap, BMC150_ACCEL_REG_INT_STATUS_2, &val);
> > if (ret < 0) {
> > dev_err(&data->client->dev, "Error reading reg_int_status_2\n");
> > return ret;
> > }
> >
> > - if (ret & BMC150_ACCEL_ANY_MOTION_BIT_SIGN)
> > + if (val & BMC150_ACCEL_ANY_MOTION_BIT_SIGN)
> > dir = IIO_EV_DIR_FALLING;
> > else
> > dir = IIO_EV_DIR_RISING;
> >
> > - if (ret & BMC150_ACCEL_ANY_MOTION_BIT_X)
> > + if (val & BMC150_ACCEL_ANY_MOTION_BIT_X)
> > iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
> > 0,
> > IIO_MOD_X,
> > IIO_EV_TYPE_ROC,
> > dir),
> > data->timestamp);
> > - if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Y)
> > + if (val & BMC150_ACCEL_ANY_MOTION_BIT_Y)
> > iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
> > 0,
> > IIO_MOD_Y,
> > IIO_EV_TYPE_ROC,
> > dir),
> > data->timestamp);
> > - if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Z)
> > + if (val & BMC150_ACCEL_ANY_MOTION_BIT_Z)
> > iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
> > 0,
> > IIO_MOD_Z,
> > @@ -1360,10 +1329,9 @@ static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private)
> > }
> >
> > if (ack) {
> > - ret = i2c_smbus_write_byte_data(data->client,
> > - BMC150_ACCEL_REG_INT_RST_LATCH,
> > - BMC150_ACCEL_INT_MODE_LATCH_INT |
> > - BMC150_ACCEL_INT_MODE_LATCH_RESET);
> > + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH,
> > + BMC150_ACCEL_INT_MODE_LATCH_INT |
> > + BMC150_ACCEL_INT_MODE_LATCH_RESET);
> > if (ret)
> > dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
> > ret = IRQ_HANDLED;
> > @@ -1516,7 +1484,7 @@ static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
> > u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1;
> > int ret;
> >
> > - ret = i2c_smbus_write_byte_data(data->client, reg, data->fifo_mode);
> > + ret = regmap_write(data->regmap, reg, data->fifo_mode);
> > if (ret < 0) {
> > dev_err(&data->client->dev, "Error writing reg_fifo_config1\n");
> > return ret;
> > @@ -1525,9 +1493,8 @@ static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
> > if (!data->fifo_mode)
> > return 0;
> >
> > - ret = i2c_smbus_write_byte_data(data->client,
> > - BMC150_ACCEL_REG_FIFO_CONFIG0,
> > - data->watermark);
> > + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_FIFO_CONFIG0,
> > + data->watermark);
> > if (ret < 0)
> > dev_err(&data->client->dev, "Error writing reg_fifo_config0\n");
> >
> > @@ -1627,6 +1594,13 @@ static int bmc150_accel_probe(struct i2c_client *client,
> > data = iio_priv(indio_dev);
> > i2c_set_clientdata(client, indio_dev);
> > data->client = client;
> > + data->dev = &client->dev;
> > +
> > + data->regmap = devm_regmap_init_i2c(client, &bmc150_i2c_regmap_conf);
> > + if (IS_ERR(data->regmap)) {
> > + dev_err(&client->dev, "Failed to initialize i2c regmap\n");
> > + return PTR_ERR(data->regmap);
> > + }
> >
> > if (id) {
> > name = id->name;
> > @@ -1680,9 +1654,8 @@ static int bmc150_accel_probe(struct i2c_client *client,
> > * want to use latch mode when we can to prevent interrupt
> > * flooding.
> > */
> > - ret = i2c_smbus_write_byte_data(data->client,
> > - BMC150_ACCEL_REG_INT_RST_LATCH,
> > - BMC150_ACCEL_INT_MODE_LATCH_RESET);
> > + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH,
> > + BMC150_ACCEL_INT_MODE_LATCH_RESET);
> > if (ret < 0) {
> > dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
> > goto err_buffer_cleanup;
> >
>
>

--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

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