ASoC: Convert UniPhier AIO audio system to json-schema

Convert the UniPhier AIO audio system binding to DT schema format.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200623113915.791386-1-yamada.masahiro@socionext.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/socionext,uniphier-aio.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/socionext,uniphier-aio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: UniPhier AIO audio system
+
+maintainers:
+  - <alsa-devel@alsa-project.org>
+
+properties:
+  compatible:
+    enum:
+      - socionext,uniphier-ld11-aio
+      - socionext,uniphier-ld20-aio
+      - socionext,uniphier-pxs2-aio
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-names:
+    const: aio
+
+  clocks:
+    maxItems: 1
+
+  reset-names:
+    const: aio
+
+  resets:
+    maxItems: 1
+
+  socionext,syscon:
+    description: |
+      Specifies a phandle to soc-glue, which is used for changing mode of S/PDIF
+      signal pin to output from Hi-Z. This property is optional if you use I2S
+      signal pins only.
+    $ref: "/schemas/types.yaml#/definitions/phandle"
+
+  "#sound-dai-cells":
+    const: 1
+
+patternProperties:
+  "^port@[0-9]$":
+    type: object
+    properties:
+      endpoint: true
+    required:
+      - endpoint
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clock-names
+  - clocks
+  - reset-names
+  - resets
+  - "#sound-dai-cells"
+
+examples:
+  - |
+    audio@56000000 {
+        compatible = "socionext,uniphier-ld20-aio";
+        reg = <0x56000000 0x80000>;
+        interrupts = <0 144 4>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_aout>;
+        clock-names = "aio";
+        clocks = <&sys_clk 40>;
+        reset-names = "aio";
+        resets = <&sys_rst 40>;
+        #sound-dai-cells = <1>;
+        socionext,syscon = <&soc_glue>;
+    };

Documentation/devicetree/bindings/sound/uniphier,aio.txt

-Socionext UniPhier SoC audio driver
-
-The Socionext UniPhier audio subsystem consists of I2S and S/PDIF blocks in
-the same register space.
-
-Required properties:
-- compatible      : should be one of the following:
-		    "socionext,uniphier-ld11-aio"
-		    "socionext,uniphier-ld20-aio"
-		    "socionext,uniphier-pxs2-aio"
-- reg             : offset and length of the register set for the device.
-- interrupts      : should contain I2S or S/PDIF interrupt.
-- pinctrl-names   : should be "default".
-- pinctrl-0       : defined I2S signal pins for an external codec chip.
-- clock-names     : should include following entries:
-                    "aio"
-- clocks          : a list of phandle, should contain an entry for each
-                    entry in clock-names.
-- reset-names     : should include following entries:
-                    "aio"
-- resets          : a list of phandle, should contain an entry for each
-                    entry in reset-names.
-- #sound-dai-cells: should be 1.
-
-Optional properties:
-- socionext,syscon: a phandle, should contain soc-glue.
-                    The soc-glue is used for changing mode of S/PDIF signal pin
-                    to Output from Hi-Z. This property is optional if you use
-                    I2S signal pins only.
-
-Example:
-	audio {
-		compatible = "socionext,uniphier-ld20-aio";
-		reg = <0x56000000 0x80000>;
-		interrupts = <0 144 4>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_aout>;
-		clock-names = "aio";
-		clocks = <&sys_clk 40>;
-		reset-names = "aio";
-		resets = <&sys_rst 40>;
-		#sound-dai-cells = <1>;
-
-		socionext,syscon = <&sg>;
-	};