ASoC: dt-bindings: ti,pcm3168a: Convert to json-schema

Convert the Texas Instruments PCM3168A Audio Codec Device Tree binding
documentation to json-schema.

Add missing properties.
Drop unneeded pinctrl properties from example.

Link: https://lore.kernel.org/r/cover.1669980383.git.geert+renesas@glider.be
Link: https://lore.kernel.org/r/87mt7qpylw.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/87k01d7rfv.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/ti,pcm3168a.txt

-Texas Instruments pcm3168a DT bindings
-
-This driver supports both SPI and I2C bus access for this codec
-
-Required properties:
-
-  - compatible: "ti,pcm3168a"
-
-  - clocks : Contains an entry for each entry in clock-names
-
-  - clock-names : Includes the following entries:
-	"scki"	The system clock
-
-  - VDD1-supply : Digital power supply regulator 1 (+3.3V)
-
-  - VDD2-supply : Digital power supply regulator 2 (+3.3V)
-
-  - VCCAD1-supply : ADC power supply regulator 1 (+5V)
-
-  - VCCAD2-supply : ADC power supply regulator 2 (+5V)
-
-  - VCCDA1-supply : DAC power supply regulator 1 (+5V)
-
-  - VCCDA2-supply : DAC power supply regulator 2 (+5V)
-
-For required properties on SPI/I2C, consult SPI/I2C device tree documentation
-
-Optional properties:
-
-  - reset-gpios : Optional reset gpio line connected to RST pin of the codec.
-		  The RST line is low active:
-		  RST = low: device power-down
-		  RST = high: device is enabled
-
-Examples:
-
-i2c0: i2c0@0 {
-
-	...
-
-	pcm3168a: audio-codec@44 {
-		compatible = "ti,pcm3168a";
-		reg = <0x44>;
-		reset-gpios = <&gpio0 4 GPIO_ACTIVE_LOW>;
-		clocks = <&clk_core CLK_AUDIO>;
-		clock-names = "scki";
-		VDD1-supply = <&supply3v3>;
-		VDD2-supply = <&supply3v3>;
-		VCCAD1-supply = <&supply5v0>;
-		VCCAD2-supply = <&supply5v0>;
-		VCCDA1-supply = <&supply5v0>;
-		VCCDA2-supply = <&supply5v0>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&dac_clk_pin>;
-	};
-};

Documentation/devicetree/bindings/sound/ti,pcm3168a.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/ti,pcm3168a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments PCM3168A Audio Codec
+
+maintainers:
+  - Damien Horsley <Damien.Horsley@imgtec.com>
+  - Geert Uytterhoeven <geert+renesas@glider.be>
+  - Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+
+description:
+  The Texas Instruments PCM3168A is a 24-bit Multi-channel Audio CODEC with
+  96/192kHz sampling rate, supporting both SPI and I2C bus access.
+
+properties:
+  compatible:
+    const: ti,pcm3168a
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: System clock input
+
+  clock-names:
+    items:
+      - const: scki
+
+  reset-gpios:
+    items:
+      - description: |
+          GPIO line connected to the active-low RST pin of the codec.
+            RST = low: device power-down
+            RST = high: device is enabled
+
+  "#sound-dai-cells":
+    enum: [0, 1]
+
+  VDD1-supply:
+    description: Digital power supply regulator 1 (+3.3V)
+
+  VDD2-supply:
+    description: Digital power supply regulator 2 (+3.3V)
+
+  VCCAD1-supply:
+    description: ADC power supply regulator 1 (+5V)
+
+  VCCAD2-supply:
+    description: ADC power supply regulator 2 (+5V)
+
+  VCCDA1-supply:
+    description: DAC power supply regulator 1 (+5V)
+
+  VCCDA2-supply:
+    description: DAC power supply regulator 2 (+5V)
+
+  ports:
+    $ref: audio-graph-port.yaml#/definitions/port-base
+    properties:
+      port@0:
+        $ref: audio-graph-port.yaml#
+        description: Audio input port.
+
+      port@1:
+        $ref: audio-graph-port.yaml#
+        description: Audio output port.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - VDD1-supply
+  - VDD2-supply
+  - VCCAD1-supply
+  - VCCAD2-supply
+  - VCCDA1-supply
+  - VCCDA2-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pcm3168a: audio-codec@44 {
+            compatible = "ti,pcm3168a";
+            reg = <0x44>;
+            reset-gpios = <&gpio0 4 GPIO_ACTIVE_LOW>;
+            clocks = <&clk_core 42>;
+            clock-names = "scki";
+            VDD1-supply = <&supply3v3>;
+            VDD2-supply = <&supply3v3>;
+            VCCAD1-supply = <&supply5v0>;
+            VCCAD2-supply = <&supply5v0>;
+            VCCDA1-supply = <&supply5v0>;
+            VCCDA2-supply = <&supply5v0>;
+        };
+    };