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    Subject[PATCH v2 1/2] ASoC: dt-bindings: add rockchip i2s bindings
    Date
    From: Jianqun Xu <xjq@rock-chips.com>

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

    Signed-off-by: Jianqun Xu <xjq@rock-chips.com>
    ---
    Changes since v1:
    - modify the description of clock-names property, adviced by Mark Rutland.
    - modify the example to fit for rk3288.

    .../devicetree/bindings/sound/rockchip-i2s.txt | 36 ++++++++++++++++++++
    1 file changed, 36 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/sound/rockchip-i2s.txt

    diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
    new file mode 100644
    index 0000000..9fc577d
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
    @@ -0,0 +1,36 @@
    +* 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: The interrupt number to the cpu. The interrupt specifier format
    + depends on the interrupt controller.
    +- #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: DMA request names should include "tx" and "rx" if present.
    +- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names.
    +- clock-names: Shall be "i2s_hclk" for I2S bus and "i2s_clk" for master clock
    +
    +Example, for rk3288 I2S controller:
    +
    +i2s0: i2s@ff890000 {
    + compatible = "rockchip,rk3066-i2s", "rockchip,rk3288-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>;
    +};
    --
    1.7.9.5



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