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From: Alexandre Mergnat <amergnat@baylibre.com>
Date: Tue, 09 Apr 2024 12:13:25 +0200
Subject: [PATCH v2 04/18] ASoC: dt-bindings: mt6357: Add audio codec
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References: <20240226-audio-i350-v2-0-3043d483de0d@baylibre.com>
In-Reply-To: <20240226-audio-i350-v2-0-3043d483de0d@baylibre.com>
To: Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, 
 Rob Herring <robh+dt@kernel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
 Conor Dooley <conor+dt@kernel.org>, 
 Matthias Brugger <matthias.bgg@gmail.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, 
 Lee Jones <lee@kernel.org>, Flora Fu <flora.fu@mediatek.com>, 
 Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, 
 Sumit Semwal <sumit.semwal@linaro.org>, 
 =?utf-8?q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>, 
 Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, 
 Rob Herring <robh@kernel.org>
Cc: linux-sound@vger.kernel.org, devicetree@vger.kernel.org, 
 linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, 
 linux-mediatek@lists.infradead.org, linux-media@vger.kernel.org, 
 dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, 
 Alexandre Mergnat <amergnat@baylibre.com>

Add MT8365 audio codec bindings to set required
and optional voltage properties between the codec and the board.
The properties are:
- phandle of the requiered power supply.
- Setup of microphone bias voltage.
- Setup of the speaker pin pull-down.

Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
---
 .../devicetree/bindings/sound/mt6357.yaml          | 54 ++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/mt6357.yaml b/Documentation/devicetree/bindings/sound/mt6357.yaml
new file mode 100644
index 000000000000..f532a9e7dff5
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/mt6357.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/mt6357.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek MT6357 Codec
+
+maintainers:
+  - Alexandre Mergnat <amergnat@baylibre.com>
+
+description: |
+  This is the required and optional voltage properties for this subdevice.
+  The communication between MT6357 and SoC is through Mediatek PMIC wrapper.
+  For more detail, please visit Mediatek PMIC wrapper documentation.
+  Must be a child node of PMIC wrapper.
+
+properties:
+  vaud28-supply:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: 2.8 volt supply for the audio codec
+
+  mediatek,hp-pull-down:
+    description:
+      Earphone driver positive output stage short to
+      the audio reference ground.
+    type: boolean
+
+  mediatek,micbias0-microvolt:
+    description: Selects MIC Bias 0 output voltage.
+    enum: [1700000, 1800000, 1900000, 2000000,
+           2100000, 2500000, 2600000, 2700000]
+    default: 1700000
+
+  mediatek,micbias1-microvolt:
+    description: Selects MIC Bias 1 output voltage.
+    enum: [1700000, 1800000, 1900000, 2000000,
+           2100000, 2500000, 2600000, 2700000]
+    default: 1700000
+
+required:
+  - vaud28-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    codec {
+        vaud28-supply = <&mt6357_vaud28_reg>;
+        mediatek,micbias0-microvolt = <1900000>;
+        mediatek,micbias1-microvolt = <1700000>;
+    };
+
+...

-- 
2.25.1