ASoC: convert rockchip spdif bindings to yaml

* Rockchip SPDIF transceiver

The 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: should be one of the following:

   - "rockchip,rk3066-spdif"

   - "rockchip,rk3188-spdif"

   - "rockchip,rk3228-spdif"

   - "rockchip,rk3288-spdif"

   - "rockchip,rk3328-spdif"

   - "rockchip,rk3366-spdif"

   - "rockchip,rk3368-spdif"

   - "rockchip,rk3399-spdif"

- reg: physical base address of the controller and length of memory mapped

  region.

- interrupts: should contain the SPDIF interrupt.

- dmas: DMA specifiers for tx dma. See the DMA client binding,

  Documentation/devicetree/bindings/dma/dma.txt

- dma-names: should be "tx"

- clocks: a list of phandle + clock-specifier pairs, one for each entry

  in clock-names.

- clock-names: should contain following:

   - "hclk": clock for SPDIF controller

   - "mclk" : clock for SPDIF bus

Required properties on RK3288:

  - rockchip,grf: the phandle of the syscon node for the general register

                   file (GRF)

Example for the rk3188 SPDIF controller:

spdif: spdif@1011e000 {

	compatible = "rockchip,rk3188-spdif", "rockchip,rk3066-spdif";

	reg = <0x1011e000 0x2000>;

	interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;

	dmas = <&dmac1_s 8>;

	dma-names = "tx";

	clock-names = "hclk", "mclk";

	clocks = <&cru HCLK_SPDIF>, <&cru SCLK_SPDIF>;

	#sound-dai-cells = <0>;

};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/sound/rockchip-spdif.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Rockchip SPDIF transceiver

description:

  The S/PDIF audio block is a stereo transceiver that allows the

  processor to receive and transmit digital audio via a coaxial or

  fibre cable.

maintainers:

  - Heiko Stuebner <heiko@sntech.de>

properties:

  compatible:

    oneOf:

      - const: rockchip,rk3066-spdif

      - const: rockchip,rk3228-spdif

      - const: rockchip,rk3328-spdif

      - const: rockchip,rk3366-spdif

      - const: rockchip,rk3368-spdif

      - const: rockchip,rk3399-spdif

      - items:

          - enum:

            - rockchip,rk3188-spdif

            - rockchip,rk3288-spdif

          - const: rockchip,rk3066-spdif

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    items:

      - description: clock for SPDIF bus

      - description: clock for SPDIF controller

  clock-names:

    items:

      - const: mclk

      - const: hclk

  dmas:

    maxItems: 1

  dma-names:

    const: tx

  rockchip,grf:

    $ref: /schemas/types.yaml#/definitions/phandle

    description:

      The phandle of the syscon node for the GRF register.

      Required property on RK3288.

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

  - dmas

  - dma-names

if:

  properties:

    compatible:

      contains:

        const: rockchip,rk3288-spdif

then:

  required:

    - rockchip,grf

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/rk3188-cru.h>

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    spdif: spdif@1011e000 {

      compatible = "rockchip,rk3188-spdif", "rockchip,rk3066-spdif";

      reg = <0x1011e000 0x2000>;

      interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;

      clocks = <&cru SCLK_SPDIF>, <&cru HCLK_SPDIF>;

      clock-names = "mclk", "hclk";

      dmas = <&dmac1_s 8>;

      dma-names = "tx";

    };