Documentation/devicetree/bindings/sound/rockchip-spdif.txt

   1 * Rockchip SPDIF transceiver
   2
   3 The S/PDIF audio block is a stereo transceiver that allows the
   4 processor to receive and transmit digital audio via an coaxial cable or
   5 a fibre cable.
   6
   7 Required properties:
   8
   9 - compatible: should be one of the following:
  10    - "rockchip,rk3288-spdif", "rockchip,rk3188-spdif" or
  11      "rockchip,rk3066-spdif"
  12 - reg: physical base address of the controller and length of memory mapped
  13   region.
  14 - interrupts: should contain the SPDIF interrupt.
  15 - dmas: DMA specifiers for tx dma. See the DMA client binding,
  16   Documentation/devicetree/bindings/dma/dma.txt
  17 - dma-names: should be "tx"
  18 - clocks: a list of phandle + clock-specifier pairs, one for each entry
  19   in clock-names.
  20 - clock-names: should contain following:
  21    - "hclk": clock for SPDIF controller
  22    - "mclk" : clock for SPDIF bus
  23
  24 Required properties on RK3288:
  25   - rockchip,grf: the phandle of the syscon node for the general register
  26                    file (GRF)
  27
  28 Example for the rk3188 SPDIF controller:
  29
  30 spdif: spdif@0x1011e000 {
  31         compatible = "rockchip,rk3188-spdif", "rockchip,rk3066-spdif";
  32         reg = <0x1011e000 0x2000>;
  33         interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
  34         dmas = <&dmac1_s 8>;
  35         dma-names = "tx";
  36         clock-names = "hclk", "mclk";
  37         clocks = <&cru HCLK_SPDIF>, <&cru SCLK_SPDIF>;
  38         status = "disabled";
  39         #sound-dai-cells = <0>;
  40 };