On Tue, Jul 01, 2014 at 09:37:39AM +0100, jianqun wrote:
> From: Jianqun Xu <xjq@xxxxxxxxxxxxxx>
>
> Add devicetree bindings for i2s controller found on rk3066, rk3188 and rk3288
> processors from rockchip.
>
> Signed-off-by: Jianqun Xu <xjq@xxxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/sound/rockchip-i2s.txt | 45 ++++++++++++++++++++
> 1 file changed, 45 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..e9ab122
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
> @@ -0,0 +1,45 @@
> +* Rockchip I2S controller
> +
> +The I2S bus (Inter-IC sound bus) is a serial link for digital audio data transfer
> +between devices in the system and be invented by Philips Semiconductor.
> +
> +Required properties:
> +
> +- compatible : should be one of the following.
> + "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 : list of DMA controller phandle and DMA request line ordered pairs.
> +- dma-names : identifier string for each DMA request line in the dmas property.
> + These strings correspond 1:1 with the ordered pairs in dmas.
> + Must include the following entries:
> + - rx:
> + - tx:
Can these be quoted for consistency with clock-names below?
> +- clocks : Handle to internal work clock and master clock output to IO.
Can this be written in terms of clock-names, e.g.
- clocks: a list of phandle + clock-specifer pairs, one for each entry
in clock-names.
Cheers,
Mark.
> +- clock-names :
> + - "i2s_hclk": support AHB bus interface
> + - "i2s_clk": work clock for i2s controller
> +
> +Example:
> +
> +aliases {
> + i2s0 = &i2s0;
> +}
> +
> +i2s0: i2s@ff890000 {
> + compatible = "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>;
> +};
> --
> 1.7.9.5
>
>
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