linux-kernel - Re: [PATCH v2 3/5] ASoC: dt-bindings: wcd93xx: add bindings for audio mux controlling hp

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Message-ID: <20250321220005.GA4185430-robh@kernel.org>
Date: Fri, 21 Mar 2025 17:00:05 -0500
From: Rob Herring <robh@...nel.org>
To: srinivas.kandagatla@...aro.org
Cc: peda@...ntia.se, broonie@...nel.org, andersson@...nel.org,
	krzk+dt@...nel.org, ivprusov@...utedevices.com,
	luca.ceresoli@...tlin.com, zhoubinbin@...ngson.cn,
	paulha@...nsource.cirrus.com, lgirdwood@...il.com,
	conor+dt@...nel.org, konradybcio@...nel.org, perex@...ex.cz,
	tiwai@...e.com, dmitry.baryshkov@....qualcomm.com,
	linux-sound@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	johan+linaro@...nel.org
Subject: Re: [PATCH v2 3/5] ASoC: dt-bindings: wcd93xx: add bindings for
 audio mux controlling hp

On Thu, Mar 20, 2025 at 11:56:31AM +0000, srinivas.kandagatla@...aro.org wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> 
> On some platforms to minimise pop and click during switching between
> CTIA and OMTP headset an additional HiFi mux is used. Most common
> case is that this switch is switched on by default, but on some
> platforms this needs a regulator enable.
> 
> Move to using mux-controls so that both the gpio and regulators can be
> driven correctly, rather than adding regulator handing in the codec.
> 
> This patch adds required bindings to add such mux controls.
> 
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml
> index 10531350c336..e7aa00a9c59a 100644
> --- a/Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml
> +++ b/Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml
> @@ -23,8 +23,13 @@ properties:
>        - qcom,wcd9380-codec
>        - qcom,wcd9385-codec
>  
> +  mux-controls:
> +    description: A reference to the audio mux switch for
> +      switching CTIA/OMTP Headset types

maxItems: 1

> +
>    us-euro-gpios:
> -    description: GPIO spec for swapping gnd and mic segments
> +    description: GPIO spec for swapping gnd and mic segments.
> +      This property is considered obsolete, recommended to use mux-controls.
>      maxItems: 1
>  
>  required:
> -- 
> 2.39.5
>