1* Rockchip I2S controller 2 3The I2S bus (Inter-IC sound bus) is a serial link for digital 4audio data transfer between devices in the system. 5 6Required properties: 7 8- compatible: should be one of the followings 9 - "rockchip,rk3066-i2s": for rk3066 10 - "rockchip,rk3188-i2s", "rockchip,rk3066-i2s": for rk3188 11 - "rockchip,rk3288-i2s", "rockchip,rk3066-i2s": for rk3288 12- reg: physical base address of the controller and length of memory mapped 13 region. 14- interrupts: should contain the I2S interrupt. 15- dmas: DMA specifiers for tx and rx dma. See the DMA client binding, 16 Documentation/devicetree/bindings/dma/dma.txt 17- dma-names: should include "tx" and "rx". 18- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names. 19- clock-names: should contain followings: 20 - "i2s_hclk": clock for I2S BUS 21 - "i2s_clk" : clock for I2S controller 22- rockchip,capture-channels: max capture channels, if not set, 2 channels default. 23 24Example for rk3288 I2S controller: 25 26i2s@ff890000 { 27 compatible = "rockchip,rk3288-i2s", "rockchip,rk3066-i2s"; 28 reg = <0xff890000 0x10000>; 29 interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>; 30 dmas = <&pdma1 0>, <&pdma1 1>; 31 dma-names = "tx", "rx"; 32 clock-names = "i2s_hclk", "i2s_clk"; 33 clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>; 34 rockchip,capture-channels = <2>; 35}; 36