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Documentation / devicetree / bindings / sound / sun4i-i2s.txt


Based on kernel version 4.16.1. Page generated on 2018-04-09 11:52 EST.

1	* Allwinner A10 I2S controller
2	
3	The I2S bus (Inter-IC sound bus) is a serial link for digital
4	audio data transfer between devices in the system.
5	
6	Required properties:
7	
8	- compatible: should be one of the following:
9	   - "allwinner,sun4i-a10-i2s"
10	   - "allwinner,sun6i-a31-i2s"
11	   - "allwinner,sun8i-a83t-i2s"
12	   - "allwinner,sun8i-h3-i2s"
13	- reg: physical base address of the controller and length of memory mapped
14	  region.
15	- interrupts: should contain the I2S interrupt.
16	- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
17		Documentation/devicetree/bindings/dma/dma.txt
18	- dma-names: should include "tx" and "rx".
19	- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names.
20	- clock-names: should contain the following:
21	   - "apb" : clock for the I2S bus interface
22	   - "mod" : module clock for the I2S controller
23	- #sound-dai-cells : Must be equal to 0
24	
25	Required properties for the following compatibles:
26		- "allwinner,sun6i-a31-i2s"
27		- "allwinner,sun8i-a83t-i2s"
28		- "allwinner,sun8i-h3-i2s"
29	- resets: phandle to the reset line for this codec
30	
31	Example:
32	
33	i2s0: i2s@1c22400 {
34		#sound-dai-cells = <0>;
35		compatible = "allwinner,sun4i-a10-i2s";
36		reg = <0x01c22400 0x400>;
37		interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
38		clocks = <&apb0_gates 3>, <&i2s0_clk>;
39		clock-names = "apb", "mod";
40		dmas = <&dma SUN4I_DMA_NORMAL 3>,
41		       <&dma SUN4I_DMA_NORMAL 3>;
42		dma-names = "rx", "tx";
43	};
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