On Wed, 2018-11-07 at 16:50 -0200, Giuliano Belinassi wrote:
> Only the ad778x have the 'gain' status bit. Check it before updating.
> 

This looks good.
The only note is that it can be squashed with the 1st patch (which I noted
on the 1st patch).

> Signed-off-by: Giuliano Belinassi <giuliano.belina...@usp.br>
> ---
>  drivers/staging/iio/adc/ad7780.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/iio/adc/ad7780.c
> b/drivers/staging/iio/adc/ad7780.c
> index 6e51bfdb076a..0a473aae52f2 100644
> --- a/drivers/staging/iio/adc/ad7780.c
> +++ b/drivers/staging/iio/adc/ad7780.c
> @@ -114,10 +114,12 @@ static int ad7780_postprocess_sample(struct
> ad_sigma_delta *sigma_delta,
>           ((raw_sample & chip_info->pattern_mask) != chip_info->pattern))
>               return -EIO;
>  
> -     if (raw_sample & AD7780_GAIN)
> -             st->gain = 1;
> -     else
> -             st->gain = 128;
> +     if (chip_info->is_ad778x) {
> +             if (raw_sample & AD7780_GAIN)
> +                     st->gain = 1;
> +             else
> +                     st->gain = 128;
> +     }
>  
>       return 0;
>  }
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