On Fri, Mar 27, 2020 at 06:40:23PM +0530, Rohit Sarkar wrote:
> The debugfs interface provides direct access to read and write device
> registers if debugfs is enabled.
FWIW,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Signed-off-by: Rohit Sarkar <rohitsarkar5398@xxxxxxxxx>
> ---
> Changelog v1->v2
> * grab a lock to protect driver state
> * add a comma at the end of structure member initialisation
>
> drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> index 7cb9ff3d3e94..381a3fb09858 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> @@ -1248,12 +1248,31 @@ static const struct attribute_group inv_attribute_group = {
> .attrs = inv_attributes
> };
>
> +static int inv_mpu6050_reg_access(struct iio_dev *indio_dev,
> + unsigned int reg,
> + unsigned int writeval,
> + unsigned int *readval)
> +{
> + struct inv_mpu6050_state *st = iio_priv(indio_dev);
> + int ret = 0;
> +
> + mutex_lock(&st->lock);
> + if (readval)
> + ret = regmap_read(st->map, reg, readval);
> + else
> + ret = regmap_write(st->map, reg, writeval);
> + mutex_unlock(&st->lock);
> +
> + return ret;
> +}
> +
> static const struct iio_info mpu_info = {
> .read_raw = &inv_mpu6050_read_raw,
> .write_raw = &inv_mpu6050_write_raw,
> .write_raw_get_fmt = &inv_write_raw_get_fmt,
> .attrs = &inv_attribute_group,
> .validate_trigger = inv_mpu6050_validate_trigger,
> + .debugfs_reg_access = &inv_mpu6050_reg_access,
> };
>
> /**
> --
> 2.23.0.385.gbc12974a89
>
--
With Best Regards,
Andy Shevchenko
