Documentation/devicetree/bindings/sound/rockchip-i2s.yaml

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/rockchip-i2s.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Rockchip I2S controller

description:
  The I2S bus (Inter-IC sound bus) is a serial link for digital
  audio data transfer between devices in the system.

maintainers:
  - Heiko Stuebner <heiko@sntech.de>

properties:
  compatible:
    oneOf:
      - const: rockchip,rk3066-i2s
      - items:
          - enum:
              - rockchip,px30-i2s
              - rockchip,rk1808-i2s
              - rockchip,rk3036-i2s
              - rockchip,rk3128-i2s
              - rockchip,rk3188-i2s
              - rockchip,rk3228-i2s
              - rockchip,rk3288-i2s
              - rockchip,rk3308-i2s
              - rockchip,rk3328-i2s
              - rockchip,rk3366-i2s
              - rockchip,rk3368-i2s
              - rockchip,rk3399-i2s
              - rockchip,rv1126-i2s
          - const: rockchip,rk3066-i2s

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    items:
      - description: clock for I2S controller
      - description: clock for I2S BUS

  clock-names:
    items:
      - const: i2s_clk
      - const: i2s_hclk

  dmas:
    minItems: 1
    maxItems: 2

  dma-names:
    oneOf:
      - const: rx
      - items:
          - const: tx
          - const: rx

  power-domains:
    maxItems: 1

  reset-names:
    items:
      - const: reset-m
      - const: reset-h

  resets:
    maxItems: 2

  rockchip,capture-channels:
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 2
    description:
      Max capture channels, if not set, 2 channels default.

  rockchip,playback-channels:
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 8
    description:
      Max playback channels, if not set, 8 channels default.

  rockchip,grf:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      The phandle of the syscon node for the GRF register.
      Required property for controllers which support multi channel
      playback/capture.

  "#sound-dai-cells":
    const: 0

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names
  - dmas
  - dma-names
  - "#sound-dai-cells"

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/rk3288-cru.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>
    i2s@ff890000 {
      compatible = "rockchip,rk3288-i2s", "rockchip,rk3066-i2s";
      reg = <0xff890000 0x10000>;
      interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
      clocks = <&cru SCLK_I2S0>, <&cru HCLK_I2S0>;
      clock-names = "i2s_clk", "i2s_hclk";
      dmas = <&pdma1 0>, <&pdma1 1>;
      dma-names = "tx", "rx";
      rockchip,capture-channels = <2>;
      rockchip,playback-channels = <8>;
      #sound-dai-cells = <0>;
    };