Documentation/devicetree/bindings/sound/zte,zx-i2s.txt

   1 ZTE ZX296702 I2S controller
   2
   3 Required properties:
   4  - compatible : Must be one of:
   5         "zte,zx296718-i2s", "zte,zx296702-i2s"
   6         "zte,zx296702-i2s"
   7  - reg : Must contain I2S core's registers location and length
   8  - clocks : Pairs of phandle and specifier referencing the controller's clocks.
   9  - clock-names: "wclk" for the wclk, "pclk" for the pclk to the I2S interface.
  10  - dmas: Pairs of phandle and specifier for the DMA channel that is used by
  11    the core. The core expects two dma channels for transmit.
  12  - dma-names : Must be "tx" and "rx"
  13
  14 For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties
  15 please check:
  16         * resource-names.txt
  17         * clock/clock-bindings.txt
  18         * dma/dma.txt
  19
  20 Example:
  21         i2s0: i2s@b005000 {
  22                 #sound-dai-cells = <0>;
  23                 compatible = "zte,zx296718-i2s", "zte,zx296702-i2s";
  24                 reg = <0x0b005000 0x1000>;
  25                 clocks = <&audiocrm AUDIO_I2S0_WCLK>, <&audiocrm AUDIO_I2S0_PCLK>;
  26                 clock-names = "wclk", "pclk";
  27                 interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
  28                 dmas = <&dma 5>, <&dma 6>;
  29                 dma-names = "tx", "rx";
  30         };
  31
  32         sound {
  33                 compatible = "simple-audio-card";
  34                 simple-audio-card,name = "zx296702_snd";
  35                 simple-audio-card,format = "left_j";
  36                 simple-audio-card,bitclock-master = <&sndcodec>;
  37                 simple-audio-card,frame-master = <&sndcodec>;
  38                 sndcpu: simple-audio-card,cpu {
  39                         sound-dai = <&i2s0>;
  40                 };
  41
  42                 sndcodec: simple-audio-card,codec {
  43                         sound-dai = <&acodec>;
  44                 };
  45         };