ASoC: convert ROHM BD28623 amplifier binding to yaml

This patch converts ROHM BD28623UMV class D speaker amplifier binding
to DT schema.
Signed-off-by: Katsuhiro Suzuki <katsuhiro@katsuster.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200722174215.988974-1-katsuhiro@katsuster.netSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/rohm,bd28623.txt

-ROHM BD28623MUV Class D speaker amplifier for digital input
-
-This codec does not have any control buses such as I2C, it detect format and
-rate of I2S signal automatically. It has two signals that can be connected
-to GPIOs: reset and mute.
-
-Required properties:
-- compatible      : should be "rohm,bd28623"
-- #sound-dai-cells: should be 0.
-- VCCA-supply     : regulator phandle for the VCCA supply
-- VCCP1-supply    : regulator phandle for the VCCP1 supply
-- VCCP2-supply    : regulator phandle for the VCCP2 supply
-
-Optional properties:
-- reset-gpios     : GPIO specifier for the active low reset line
-- mute-gpios      : GPIO specifier for the active low mute line
-
-Example:
-
-	codec {
-		compatible = "rohm,bd28623";
-		#sound-dai-cells = <0>;
-
-		VCCA-supply = <&vcc_reg>;
-		VCCP1-supply = <&vcc_reg>;
-		VCCP2-supply = <&vcc_reg>;
-		reset-gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
-		mute-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
-	};

Documentation/devicetree/bindings/sound/rohm,bd28623.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/rohm,bd28623.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BD28623MUV Class D speaker amplifier for digital input
+
+description:
+  This codec does not have any control buses such as I2C, it detect
+  format and rate of I2S signal automatically. It has two signals
+  that can be connected to GPIOs reset and mute.
+
+maintainers:
+  - Katsuhiro Suzuki <katsuhiro@katsuster.net>
+
+properties:
+  compatible:
+    const: rohm,bd28623
+
+  "#sound-dai-cells":
+    const: 0
+
+  VCCA-supply:
+    description:
+      regulator phandle for the VCCA (for analog) power supply
+
+  VCCP1-supply:
+    description:
+      regulator phandle for the VCCP1 (for ch1) power supply
+
+  VCCP2-supply:
+    description:
+      regulator phandle for the VCCP2 (for ch2) power supply
+
+  reset-gpios:
+    maxItems: 1
+    description:
+      GPIO specifier for the active low reset line
+
+  mute-gpios:
+    maxItems: 1
+    description:
+      GPIO specifier for the active low mute line
+
+required:
+  - compatible
+  - VCCA-supply
+  - VCCP1-supply
+  - VCCP2-supply
+  - "#sound-dai-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    codec {
+      compatible = "rohm,bd28623";
+      #sound-dai-cells = <0>;
+
+      VCCA-supply = <&vcc_reg>;
+      VCCP1-supply = <&vcc_reg>;
+      VCCP2-supply = <&vcc_reg>;
+      reset-gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+      mute-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+    };