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
  14   - reg                 : Offset and length of the register set for the device.
  15
  16   - interrupts          : Contains the spdif interrupt.
  17
  18   - dmas                : Generic dma devicetree binding as described in
  19                           Documentation/devicetree/bindings/dma/dma.txt.
  20
  21   - dma-names           : Two dmas have to be defined, "tx" and "rx".
  22
  23   - clocks              : Contains an entry for each entry in clock-names.
  24
  25   - clock-names         : Includes the following entries:
  26         "apb"             clock for the spdif bus.
  27         "spdif"           clock for spdif controller.
  28
  29   - resets              : reset specifier for the ahb reset (A31 and newer only)
  30
  31 Example:
  32
  33 spdif: spdif@01c21000 {
  34         compatible = "allwinner,sun4i-a10-spdif";
  35         reg = <0x01c21000 0x40>;
  36         interrupts = <13>;
  37         clocks = <&apb0_gates 1>, <&spdif_clk>;
  38         clock-names = "apb", "spdif";
  39         dmas = <&dma 0 2>, <&dma 0 2>;
  40         dma-names = "rx", "tx";
  41         status = "okay";
  42 };