[alsa-devel] [PATCHv3 8/9] WM8971 adds kcontrol functions

[Charles Keepax]

On Tue, Sep 02, 2014 at 11:27:49AM +0800, Xavier Hsu wrote:
> This patch improves WM8971.
> We add kcontrol functions on WM8971.
> 
> Any comments about improving the patch are welcome.
> Thanks.
> 
> Signed-off-by: Xavier Hsu <xavier.hsu at linaro.org>
> Signed-off-by: Andy Green <andy.green at linaro.org>
> ---
>  sound/soc/codecs/wm8971.c |    6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/sound/soc/codecs/wm8971.c b/sound/soc/codecs/wm8971.c
> index 95e7c39..6d34565 100755
> --- a/sound/soc/codecs/wm8971.c
> +++ b/sound/soc/codecs/wm8971.c
> @@ -284,6 +284,12 @@ static const struct snd_kcontrol_new wm8971_snd_controls[] = {
>  
>  	SOC_DOUBLE_R_TLV("ADC Volume", WM8971_LADC, WM8971_RADC,
>  			 0, 255, 0, adc_vol),
> +
> +	SOC_SINGLE("Analogue Bias", WM8971_ADCTL1, 6, 3, 0),

Given this relates to the AVDD voltage feels it is very unlikely
to change at runtime. Do we expect it to? Otherwise it might be
better added as a DT entry.

> +	SOC_SINGLE("Right Speaker Playback Invert Switch", WM8971_ADCTL2,
> +		   4, 1, 0),
> +	SOC_SINGLE("Headphone Switch POL", WM8971_ADCTL2, 5, 1, 0),

Again the polarity of the headphone detect is not going to change
at runtime so this should probably be a DT entry.

> +	SOC_SINGLE("Headphone Switch EN", WM8971_ADCTL2, 6, 1, 0),

I am less clear on whether or not this should be a control or a
DT entry, so as long as you are happy this is consistent with the
usage.

>  };
>  
>  /*
> -- 

Thanks,
Charles