[alsa-devel] [PATCH] ASoC: cs53l30: Add MUTE pin control support via GPIO

[Rob Herring]

On Mon, Jun 20, 2016 at 06:54:44PM -0700, Nicolin Chen wrote:
> The codec chip has a physical MUTE pin to let users control it via
> GPIO. So this patch add a mute control support to the driver.
> 
> Signed-off-by: Nicolin Chen <nicoleotsuka at gmail.com>
> ---
>  .../devicetree/bindings/sound/cs53l30.txt          |  2 ++
>  sound/soc/codecs/cs53l30.c                         | 30 ++++++++++++++++++++++
>  sound/soc/codecs/cs53l30.h                         |  1 +
>  3 files changed, 33 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/cs53l30.txt b/Documentation/devicetree/bindings/sound/cs53l30.txt
> index 18d6b99..6f7d3c8 100644
> --- a/Documentation/devicetree/bindings/sound/cs53l30.txt
> +++ b/Documentation/devicetree/bindings/sound/cs53l30.txt
> @@ -13,6 +13,8 @@ Optional properties:
>  
>    - reset-gpios : a GPIO spec for the reset pin.
>  
> +  - mute-gpios : a GPIO spec for the MUTE pin.

Please define the active state for the gpio.

> +
>    - cirrus,micbias-lvl : Set the output voltage level on the MICBIAS Pin.
>  			 0 = Hi-Z
>  			 1 = 1.80 V