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

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Message-Id: <20250320115633.4248-4-srinivas.kandagatla@linaro.org>
Date: Thu, 20 Mar 2025 11:56:31 +0000
From: srinivas.kandagatla@...aro.org
To: peda@...ntia.se,
	broonie@...nel.org,
	andersson@...nel.org,
	krzk+dt@...nel.org
Cc: ivprusov@...utedevices.com,
	luca.ceresoli@...tlin.com,
	zhoubinbin@...ngson.cn,
	paulha@...nsource.cirrus.com,
	lgirdwood@...il.com,
	robh@...nel.org,
	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,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v2 3/5] ASoC: dt-bindings: wcd93xx: add bindings for audio mux controlling hp

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
+
   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