Looks good to me.
Acked-by: Denis Ciocca <denis.ciocca@xxxxxx>
Denis
> On Aug 12, 2015, at 16:22, Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:
>
> This adds a debugfs hook to read/write registers in the ST
> sensors using debugfs. Proved to be awesome help when trying
> to debug why IRQs do not arrive.
>
> Cc: Denis Ciocca <denis.ciocca@xxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
> ChangeLog v1->v2:
> - User &ersand i front of function name for debugfs helper
> - EXPORT the debugfs regread symbol so modules work
> ---
> drivers/iio/accel/st_accel_core.c | 1 +
> drivers/iio/common/st_sensors/st_sensors_core.c | 22 ++++++++++++++++++++++
> drivers/iio/gyro/st_gyro_core.c | 1 +
> drivers/iio/magnetometer/st_magn_core.c | 1 +
> drivers/iio/pressure/st_pressure_core.c | 1 +
> include/linux/iio/common/st_sensors.h | 4 ++++
> 6 files changed, 30 insertions(+)
>
> diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c
> index 6617e779aa87..058c87d9f564 100644
> --- a/drivers/iio/accel/st_accel_core.c
> +++ b/drivers/iio/accel/st_accel_core.c
> @@ -612,6 +612,7 @@ static const struct iio_info accel_info = {
> .attrs = &st_accel_attribute_group,
> .read_raw = &st_accel_read_raw,
> .write_raw = &st_accel_write_raw,
> + .debugfs_reg_access = &st_sensors_debugfs_reg_access,
> };
>
> #ifdef CONFIG_IIO_TRIGGER
> diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
> index 8086cbcff87d..3129128857ea 100644
> --- a/drivers/iio/common/st_sensors/st_sensors_core.c
> +++ b/drivers/iio/common/st_sensors/st_sensors_core.c
> @@ -44,6 +44,28 @@ st_sensors_write_data_with_mask_error:
> return err;
> }
>
> +int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev,
> + unsigned reg, unsigned writeval,
> + unsigned *readval)
> +{
> + struct st_sensor_data *sdata = iio_priv(indio_dev);
> + u8 readdata;
> + int err;
> +
> + if (!readval)
> + return sdata->tf->write_byte(&sdata->tb, sdata->dev,
> + (u8)reg, (u8)writeval);
> +
> + err = sdata->tf->read_byte(&sdata->tb, sdata->dev, (u8)reg, &readdata);
> + if (err < 0)
> + return err;
> +
> + *readval = (unsigned)readdata;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(st_sensors_debugfs_reg_access);
> +
> static int st_sensors_match_odr(struct st_sensor_settings *sensor_settings,
> unsigned int odr, struct st_sensor_odr_avl *odr_out)
> {
> diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c
> index ffe96642b6d0..3bbe63117175 100644
> --- a/drivers/iio/gyro/st_gyro_core.c
> +++ b/drivers/iio/gyro/st_gyro_core.c
> @@ -380,6 +380,7 @@ static const struct iio_info gyro_info = {
> .attrs = &st_gyro_attribute_group,
> .read_raw = &st_gyro_read_raw,
> .write_raw = &st_gyro_write_raw,
> + .debugfs_reg_access = &st_sensors_debugfs_reg_access,
> };
>
> #ifdef CONFIG_IIO_TRIGGER
> diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
> index b4bcfb790f49..d612069e4e70 100644
> --- a/drivers/iio/magnetometer/st_magn_core.c
> +++ b/drivers/iio/magnetometer/st_magn_core.c
> @@ -475,6 +475,7 @@ static const struct iio_info magn_info = {
> .attrs = &st_magn_attribute_group,
> .read_raw = &st_magn_read_raw,
> .write_raw = &st_magn_write_raw,
> + .debugfs_reg_access = &st_sensors_debugfs_reg_access,
> };
>
> int st_magn_common_probe(struct iio_dev *indio_dev)
> diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
> index e881fa6291e9..84f965deff80 100644
> --- a/drivers/iio/pressure/st_pressure_core.c
> +++ b/drivers/iio/pressure/st_pressure_core.c
> @@ -397,6 +397,7 @@ static const struct iio_info press_info = {
> .attrs = &st_press_attribute_group,
> .read_raw = &st_press_read_raw,
> .write_raw = &st_press_write_raw,
> + .debugfs_reg_access = &st_sensors_debugfs_reg_access,
> };
>
> #ifdef CONFIG_IIO_TRIGGER
> diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h
> index 2c476acb87d9..d8b4a7bc4029 100644
> --- a/include/linux/iio/common/st_sensors.h
> +++ b/include/linux/iio/common/st_sensors.h
> @@ -269,6 +269,10 @@ void st_sensors_power_enable(struct iio_dev *indio_dev);
>
> void st_sensors_power_disable(struct iio_dev *indio_dev);
>
> +int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev,
> + unsigned reg, unsigned writeval,
> + unsigned *readval);
> +
> int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr);
>
> int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable);
> --
> 2.4.3
>
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