Kernel-4.18.0-80.el8_zte,zx-i2s

ZTE ZX296702 I2S controller

Required properties:

• compatible : Must be one of:
  “zte,zx296718-i2s”, “zte,zx296702-i2s”
  “zte,zx296702-i2s”
• reg : Must contain I2S core’s registers location and length
• clocks : Pairs of phandle and specifier referencing the controller’s clocks.
• clock-names: “wclk” for the wclk, “pclk” for the pclk to the I2S interface.
• dmas: Pairs of phandle and specifier for the DMA channel that is used by
  the core. The core expects two dma channels for transmit.
• dma-names : Must be “tx” and “rx”

For more details on the ‘dma’, ‘dma-names’, ‘clock’ and ‘clock-names’ properties
please check:
* resource-names.txt
* clock/clock-bindings.txt
* dma/dma.txt

Example:
i2s0: i2s@b005000 {
#sound-dai-cells = <0>;
compatible = “zte,zx296718-i2s”, “zte,zx296702-i2s”;
reg = <0x0b005000 0x1000>;
clocks = <&audiocrm AUDIO_I2S0_WCLK>, <&audiocrm AUDIO_I2S0_PCLK>;
clock-names = “wclk”, “pclk”;
interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
dmas = <&dma 5>, <&dma 6>;
dma-names = “tx”, “rx”;
};

sound {
    compatible = "simple-audio-card";
    simple-audio-card,name = "zx296702_snd";
    simple-audio-card,format = "left_j";
    simple-audio-card,bitclock-master = <&sndcodec>;
    simple-audio-card,frame-master = <&sndcodec>;
    sndcpu: simple-audio-card,cpu {
        sound-dai = <&i2s0>;
    };

    sndcodec: simple-audio-card,codec {
        sound-dai = <&acodec>;
    };
};