Re: [PATCH 3/5] iio: imu: st_lsm6dsx: add addr/max_word_len to st_lsm6dsx_read_block()

[Jonathan Cameron <jic23@kernel.org>]

On Thu, 30 Aug 2018 22:52:57 +0200
Lorenzo Bianconi <lorenzo.bianconi@redhat.com> wrote:

> Add reg addr and max_word_len parameters to st_lsm6dsx_read_block
> since LSM6DSO will use a different register address to read samples
> from the FIFO and a different sample len
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Applied.  Thanks
> ---
>  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> index 7e02935a4250..2002ba4a1abd 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> @@ -255,18 +255,18 @@ static int st_lsm6dsx_reset_hw_ts(struct st_lsm6dsx_hw *hw)
>   * Set max bulk read to ST_LSM6DSX_MAX_WORD_LEN in order to avoid
>   * a kmalloc for each bus access
>   */
> -static inline int st_lsm6dsx_read_block(struct st_lsm6dsx_hw *hw, u8 *data,
> -					unsigned int data_len)
> +static inline int st_lsm6dsx_read_block(struct st_lsm6dsx_hw *hw, u8 addr,
> +					u8 *data, unsigned int data_len,
> +					unsigned int max_word_len)
>  {
>  	unsigned int word_len, read_len = 0;
>  	int err;
>  
>  	while (read_len < data_len) {
>  		word_len = min_t(unsigned int, data_len - read_len,
> -				 ST_LSM6DSX_MAX_WORD_LEN);
> -		err = regmap_bulk_read(hw->regmap,
> -				       ST_LSM6DSX_REG_FIFO_OUTL_ADDR,
> -				       data + read_len, word_len);
> +				 max_word_len);
> +		err = regmap_bulk_read(hw->regmap, addr, data + read_len,
> +				       word_len);
>  		if (err < 0)
>  			return err;
>  		read_len += word_len;
> @@ -316,7 +316,9 @@ int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
>  	gyro_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_GYRO]);
>  
>  	for (read_len = 0; read_len < fifo_len; read_len += pattern_len) {
> -		err = st_lsm6dsx_read_block(hw, hw->buff, pattern_len);
> +		err = st_lsm6dsx_read_block(hw, ST_LSM6DSX_REG_FIFO_OUTL_ADDR,
> +					    hw->buff, pattern_len,
> +					    ST_LSM6DSX_MAX_WORD_LEN);
>  		if (err < 0) {
>  			dev_err(hw->dev,
>  				"failed to read pattern from fifo (err=%d)\n",