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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 };