linux-kernel - [PATCH 1/3] ASoC: dt-bindings: samsung,midas-audio: Add GPIO-based headset jack detection

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Message-Id: <20240503-midas-wm1811-gpio-jack-v1-1-e8cddbd67cbf@gmail.com>
Date: Fri, 03 May 2024 20:55:11 +0200
From: Artur Weber <aweber.kernel@...il.com>
To: Sylwester Nawrocki <s.nawrocki@...sung.com>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
 Alim Akhtar <alim.akhtar@...sung.com>, alsa-devel@...a-project.org, 
 linux-sound@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht, 
 Artur Weber <aweber.kernel@...il.com>
Subject: [PATCH 1/3] ASoC: dt-bindings: samsung,midas-audio: Add GPIO-based
 headset jack detection

Some Samsung devices that share the midas-audio driver use a GPIO-based
approach to headset jack detection, as opposed to using the built-in
jack detection provided by the wm8994 driver.

Add DT configuration values that allow for describing these setups.

Signed-off-by: Artur Weber <aweber.kernel@...il.com>
---
 .../bindings/sound/samsung,midas-audio.yaml        | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml b/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml
index 6ec80f529d84..9f521131f2b3 100644
--- a/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml
+++ b/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml
@@ -61,6 +61,36 @@ properties:
     maxItems: 1
     description: GPIO pin for line out selection
 
+  headset-detect-gpios:
+    maxItems: 1
+    description: GPIO for detection of headset insertion
+
+  headset-key-gpios:
+    maxItems: 1
+    description: GPIO for detection of headset key press
+
+  io-channels:
+    maxItems: 1
+    description: IO channel to read micbias voltage for headset detection
+
+  io-channel-names:
+    const: headset-detect
+
+  headset-4pole-threshold-microvolt:
+    minItems: 2
+    maxItems: 2
+    description: |
+      Array containing minimum and maximum IO channel value for 4-pole
+      (with microphone/button) headsets. If the IO channel value is
+      outside of this range, a 3-pole headset is assumed.
+
+  headset-button-threshold-microvolt:
+    minItems: 3
+    maxItems: 3
+    description: |
+      Array of minimum (inclusive) IO channel values for headset button
+      detection, in order: "Media", "Volume Up" and "Volume Down".
+
 required:
   - compatible
   - cpu

-- 
2.45.0