Documentation/devicetree/bindings/sound/sunxi,sun4i-spdif.txt

   1 Allwinner Sony/Philips Digital Interface Format (S/PDIF) Controller
   2
   3 The Allwinner S/PDIF audio block is a transceiver that allows the
   4 processor to receive and transmit digital audio via an coaxial cable or
   5 a fibre cable.
   6 For now only playback is supported.
   7
   8 Required properties:
   9
  10   - compatible          : should be one of the following:
  11     - "allwinner,sun4i-a10-spdif": for the Allwinner A10 SoC
  12     - "allwinner,sun6i-a31-spdif": for the Allwinner A31 SoC
  13     - "allwinner,sun8i-h3-spdif": for the Allwinner H3 SoC
  14
  15   - reg                 : Offset and length of the register set for the device.
  16
  17   - interrupts          : Contains the spdif interrupt.
  18
  19   - dmas                : Generic dma devicetree binding as described in
  20                           Documentation/devicetree/bindings/dma/dma.txt.
  21
  22   - dma-names           : Two dmas have to be defined, "tx" and "rx".
  23
  24   - clocks              : Contains an entry for each entry in clock-names.
  25
  26   - clock-names         : Includes the following entries:
  27         "apb"             clock for the spdif bus.
  28         "spdif"           clock for spdif controller.
  29
  30   - resets              : reset specifier for the ahb reset (A31 and newer only)
  31
  32 Example:
  33
  34 spdif: spdif@01c21000 {
  35         compatible = "allwinner,sun4i-a10-spdif";
  36         reg = <0x01c21000 0x40>;
  37         interrupts = <13>;
  38         clocks = <&apb0_gates 1>, <&spdif_clk>;
  39         clock-names = "apb", "spdif";
  40         dmas = <&dma 0 2>, <&dma 0 2>;
  41         dma-names = "rx", "tx";
  42         status = "okay";
  43 };