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: +- clocks : Handle to internal work clock and master clock output to IO. +- 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>; +};