| * 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: should contain the I2S interrupt. |
| - #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: should include "tx" and "rx". |
| - clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names. |
| - clock-names: should contain followings: |
| - "i2s_hclk": clock for I2S BUS |
| - "i2s_clk" : clock for I2S controller |
| |
| Example for rk3288 I2S controller: |
| |
| i2s@ff890000 { |
| compatible = "rockchip,rk3288-i2s", "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 = "tx", "rx"; |
| clock-names = "i2s_hclk", "i2s_clk"; |
| clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>; |
| }; |