FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/sound/hisilicon,hi6210-i2s.txt

     * Hisilicon 6210 i2s controller
     
     Required properties:
     
     - compatible: should be one of the following:
        - "hisilicon,hi6210-i2s"
     - reg: physical base address of the i2s controller unit and length of
        memory mapped region.
     - interrupts: should contain the i2s interrupt.
    - clocks: a list of phandle + clock-specifier pairs, one for each entry
      in clock-names.
    - clock-names: should contain following:
       - "dacodec"
       - "i2s-base"
    - dmas: DMA specifiers for tx dma. See the DMA client binding,
      Documentation/devicetree/bindings/dma/dma.txt
    - dma-names: should be "tx" and "rx"
    - hisilicon,sysctrl-syscon: phandle to sysctrl syscon
    - #sound-dai-cells: Should be set to 1 (for multi-dai)
       - The dai cell indexes reference the following interfaces:
           0: S2 interface
           (Currently that is the only one available, but more may be
            supported in the future)
    
    Example for the hi6210 i2s controller:
    
    i2s0: i2s@f7118000{
            compatible = "hisilicon,hi6210-i2s";
            reg = <0x0 0xf7118000 0x0 0x8000>; /* i2s unit */
            interrupts = <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>; /* 155 "DigACodec_intr"-32 */
            clocks = <&sys_ctrl HI6220_DACODEC_PCLK>,
                     <&sys_ctrl HI6220_BBPPLL0_DIV>;
            clock-names = "dacodec", "i2s-base";
            dmas = <&dma0 15 &dma0 14>;
            dma-names = "rx", "tx";
            hisilicon,sysctrl-syscon = <&sys_ctrl>;
            #sound-dai-cells = <1>;
    };
    
    Then when referencing the i2s controller:
            sound-dai = <&i2s0 0>; /* index 0 => S2 interface */
    

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