Re: [PATCH v5 03/11] staging: iio: ad7780: add gain reading to ad778x

Jonathan Cameron
2019-03-16T17:54:33Z

On Fri, 15 Mar 2019 23:13:13 -0300
Renato Lui Geh <renatogeh@gmail.com> wrote:

> This patch adds a new functionality of reading gain values from the
> ad778x chips. This value is stored in the chip's state struct and is
> updated whenever a read or write call is performed on the driver.
>
> Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>

Applied, thanks

> ---
> drivers/staging/iio/adc/ad7780.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
> index f4cd7bc3e02f..fbcc0d3345ca 100644
> --- a/drivers/staging/iio/adc/ad7780.c
> +++ b/drivers/staging/iio/adc/ad7780.c
> @@ -42,6 +42,8 @@
> #define AD7780_GAIN_MIDPOINT 64
> #define AD7780_FILTER_MIDPOINT 13350
>
> +static const unsigned int ad778x_gain[2] = { 1, 128 };
> +
> struct ad7780_chip_info {
> struct iio_chan_spec channel;
> unsigned int pattern_mask;
> @@ -179,6 +181,9 @@ static int ad7780_postprocess_sample(struct ad_sigma_delta *sigma_delta,
> ((raw_sample & chip_info->pattern_mask) != chip_info->pattern))
> return -EIO;
>
> + if (chip_info->is_ad778x)
> + st->gain = ad778x_gain[raw_sample & AD7780_GAIN];
> +
> return 0;
> }
>