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ASoC: dt-bindings: add rockchip i2s bindings

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Add devicetree bindings for i2s controller found on
rk3066, rk3188 and rk3288 processors from rockchip.

Signed-off-by: Jianqun Xu <xjq@rock-chips.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Jianqun Xu 2014-07-05 19:10:38 +08:00 committed by Mark Brown
parent 7171511eae
commit d4796e35fb
1 changed files with 37 additions and 0 deletions
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Documentation/devicetree/bindings/sound/rockchip-i2s.txt Normal file
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* Rockchip I2S controller
The I2S bus (Inter-IC sound bus) is a serial link for digital
audio data transfer between devices in the system.
Required properties:
- compatible: should be one of the followings
- "rockchip,rk3066-i2s": for rk3066
- "rockchip,rk3188-i2s", "rockchip,rk3066-i2s": for rk3188
- "rockchip,rk3288-i2s", "rockchip,rk3066-i2s": for rk3288
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: should contain the I2S interrupt.
- #address-cells: should be 1.
- #size-cells: should be 0.
- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
Documentation/devicetree/bindings/dma/dma.txt
- dma-names: should include "tx" and "rx".
- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names.
- clock-names: should contain followings:
- "i2s_hclk": clock for I2S BUS
- "i2s_clk" : clock for I2S controller
Example for rk3288 I2S controller:
i2s@ff890000 {
compatible = "rockchip,rk3288-i2s", "rockchip,rk3066-i2s";
reg = <0xff890000 0x10000>;
interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
#address-cells = <1>;
#size-cells = <0>;
dmas = <&pdma1 0>, <&pdma1 1>;
dma-names = "rx", "tx";
clock-names = "i2s_hclk", "i2s_clk";
clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>;
};