ASoC: Convert NXP spdif to json-schema

Convert the NXP SPDIF binding to DT schema format using json-schema.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1597712771-32433-1-git-send-email-Anson.Huang@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/fsl,spdif.txt

-Freescale Sony/Philips Digital Interface Format (S/PDIF) Controller
-
-The Freescale S/PDIF audio block is a stereo transceiver that allows the
-processor to receive and transmit digital audio via an coaxial cable or
-a fibre cable.
-
-Required properties:
-
-  - compatible		: Compatible list, should contain one of the following
-			  compatibles:
-			  "fsl,imx35-spdif",
-			  "fsl,vf610-spdif",
-			  "fsl,imx6sx-spdif",
-
-  - reg			: Offset and length of the register set for the device.
-
-  - interrupts		: Contains the spdif interrupt.
-
-  - dmas		: Generic dma devicetree binding as described in
-			  Documentation/devicetree/bindings/dma/dma.txt.
-
-  - dma-names		: Two dmas have to be defined, "tx" and "rx".
-
-  - clocks		: Contains an entry for each entry in clock-names.
-
-  - clock-names		: Includes the following entries:
-	"core"		  The core clock of spdif controller.
-	"rxtx<0-7>"	  Clock source list for tx and rx clock.
-			  This clock list should be identical to the source
-			  list connecting to the spdif clock mux in "SPDIF
-			  Transceiver Clock Diagram" of SoC reference manual.
-			  It can also be referred to TxClk_Source bit of
-			  register SPDIF_STC.
-	"spba"		  The spba clock is required when SPDIF is placed as a
-			  bus slave of the Shared Peripheral Bus and when two
-			  or more bus masters (CPU, DMA or DSP) try to access
-			  it. This property is optional depending on the SoC
-			  design.
-
-Optional properties:
-
-   - big-endian		: If this property is absent, the native endian mode
-			  will be in use as default, or the big endian mode
-			  will be in use for all the device registers.
-
-Example:
-
-spdif: spdif@2004000 {
-	compatible = "fsl,imx35-spdif";
-	reg = <0x02004000 0x4000>;
-	interrupts = <0 52 0x04>;
-	dmas = <&sdma 14 18 0>,
-	       <&sdma 15 18 0>;
-	dma-names = "rx", "tx";
-
-	clocks = <&clks 197>, <&clks 3>,
-	       <&clks 197>, <&clks 107>,
-	       <&clks 0>, <&clks 118>,
-	       <&clks 62>, <&clks 139>,
-	       <&clks 0>;
-	clock-names = "core", "rxtx0",
-		"rxtx1", "rxtx2",
-		"rxtx3", "rxtx4",
-		"rxtx5", "rxtx6",
-		"rxtx7";
-
-	big-endian;
-};

Documentation/devicetree/bindings/sound/fsl,spdif.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/fsl,spdif.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale Sony/Philips Digital Interface Format (S/PDIF) Controller
+
+maintainers:
+  - Shengjiu Wang <shengjiu.wang@nxp.com>
+
+description: |
+  The Freescale S/PDIF audio block is a stereo transceiver that allows the
+  processor to receive and transmit digital audio via an coaxial cable or
+  a fibre cable.
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx35-spdif
+      - fsl,vf610-spdif
+      - fsl,imx6sx-spdif
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  dmas:
+    items:
+      - description: DMA controller phandle and request line for RX
+      - description: DMA controller phandle and request line for TX
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+  clocks:
+    items:
+      - description: The core clock of spdif controller.
+      - description: Clock for tx0 and rx0.
+      - description: Clock for tx1 and rx1.
+      - description: Clock for tx2 and rx2.
+      - description: Clock for tx3 and rx3.
+      - description: Clock for tx4 and rx4.
+      - description: Clock for tx5 and rx5.
+      - description: Clock for tx6 and rx6.
+      - description: Clock for tx7 and rx7.
+      - description: The spba clock is required when SPDIF is placed as a bus
+          slave of the Shared Peripheral Bus and when two or more bus masters
+          (CPU, DMA or DSP) try to access it. This property is optional depending
+          on the SoC design.
+    minItems: 9
+
+  clock-names:
+    items:
+      - const: core
+      - const: rxtx0
+      - const: rxtx1
+      - const: rxtx2
+      - const: rxtx3
+      - const: rxtx4
+      - const: rxtx5
+      - const: rxtx6
+      - const: rxtx7
+      - const: spba
+    minItems: 9
+
+  big-endian:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      If this property is absent, the native endian mode will be in use
+      as default, or the big endian mode will be in use for all the device
+      registers. Set this flag for HCDs with big endian descriptors and big
+      endian registers.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - dmas
+  - dma-names
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    spdif@2004000 {
+        compatible = "fsl,imx35-spdif";
+        reg = <0x02004000 0x4000>;
+        interrupts = <0 52 0x04>;
+        dmas = <&sdma 14 18 0>,
+               <&sdma 15 18 0>;
+        dma-names = "rx", "tx";
+        clocks = <&clks 197>, <&clks 3>,
+                 <&clks 197>, <&clks 107>,
+                 <&clks 0>, <&clks 118>,
+                 <&clks 62>, <&clks 139>,
+                 <&clks 0>;
+        clock-names = "core", "rxtx0",
+                      "rxtx1", "rxtx2",
+                      "rxtx3", "rxtx4",
+                      "rxtx5", "rxtx6",
+                      "rxtx7";
+        big-endian;
+    };