1* Hisilicon 6210 i2s controller
2
3Required properties:
4
5- compatible: should be one of the following:
6   - "hisilicon,hi6210-i2s"
7- reg: physical base address of the i2s controller unit and length of
8   memory mapped region.
9- interrupts: should contain the i2s interrupt.
10- clocks: a list of phandle + clock-specifier pairs, one for each entry
11  in clock-names.
12- clock-names: should contain following:
13   - "dacodec"
14   - "i2s-base"
15- dmas: DMA specifiers for tx dma. See the DMA client binding,
16  Documentation/devicetree/bindings/dma/dma.txt
17- dma-names: should be "tx" and "rx"
18- hisilicon,sysctrl-syscon: phandle to sysctrl syscon
19- #sound-dai-cells: Should be set to 1 (for multi-dai)
20   - The dai cell indexes reference the following interfaces:
21       0: S2 interface
22       (Currently that is the only one available, but more may be
23        supported in the future)
24
25Example for the hi6210 i2s controller:
26
27i2s0: i2s@f7118000{
28	compatible = "hisilicon,hi6210-i2s";
29	reg = <0x0 0xf7118000 0x0 0x8000>; /* i2s unit */
30	interrupts = <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>; /* 155 "DigACodec_intr"-32 */
31	clocks = <&sys_ctrl HI6220_DACODEC_PCLK>,
32		 <&sys_ctrl HI6220_BBPPLL0_DIV>;
33	clock-names = "dacodec", "i2s-base";
34	dmas = <&dma0 15 &dma0 14>;
35	dma-names = "rx", "tx";
36	hisilicon,sysctrl-syscon = <&sys_ctrl>;
37	#sound-dai-cells = <1>;
38};
39
40Then when referencing the i2s controller:
41	sound-dai = <&i2s0 0>; /* index 0 => S2 interface */
42
43