On Tue, Jul 01, 2014 at 09:37:39AM +0100, jianqun wrote:
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
.../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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