[PATCH v4 03/16] dt-bindings: mfd: mediatek: Add codec property for MT6357 PMIC

[Alexandre Mergnat <amergnat@xxxxxxxxxxxx>]

Add the audio codec sub-device. This sub-device is used to set required
and optional voltage needed according to the hardware.
The properties are:
  - phandle of the required power supply.
  - Setup of microphone bias voltage.
  - Setup of the speaker pin pull-down.

Signed-off-by: Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
---
 .../devicetree/bindings/mfd/mediatek,mt6357.yaml   | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml b/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml
index 37423c2e0fdf..30234f13a810 100644
--- a/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml
+++ b/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml
@@ -37,6 +37,34 @@ properties:
   "#interrupt-cells":
     const: 2
 
+  audio-codec:
+    type: object
+    properties:
+      vaud28-supply:
+        description: 2.8 volt supply phandle 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
+    unevaluatedProperties: false
+
   regulators:
     type: object
     $ref: /schemas/regulator/mediatek,mt6357-regulator.yaml
@@ -83,6 +111,12 @@ examples:
             interrupt-controller;
             #interrupt-cells = <2>;
 
+            audio-codec {
+                mediatek,micbias0-microvolt = <1700000>;
+                mediatek,micbias1-microvolt = <1700000>;
+                vaud28-supply = <&mt6357_vaud28_reg>;
+            };
+
             regulators {
                 mt6357_vproc_reg: buck-vproc {
                     regulator-name = "vproc";

-- 
2.25.1