This patch adds DT bindings for the new Atmel I2S controller embedded inside sama5d2x SoCs.
Signed-off-by: Cyrille Pitchen cyrille.pitchen@atmel.com --- .../devicetree/bindings/sound/atmel-i2s.txt | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/atmel-i2s.txt
diff --git a/Documentation/devicetree/bindings/sound/atmel-i2s.txt b/Documentation/devicetree/bindings/sound/atmel-i2s.txt new file mode 100644 index 000000000000..83bc6b9070bf --- /dev/null +++ b/Documentation/devicetree/bindings/sound/atmel-i2s.txt @@ -0,0 +1,43 @@ +* Atmel I2S controller + +Required properties: +- compatible: Should be "atmel,sama5d2-i2s". +- reg: Should be the physical base address of the controller and the + length of memory mapped region. +- interrupts: Should contain the interrupt for the controller. +- dmas: Should be a list of pairs of DMA controller phandle and flags. +- dma-names: Should be a list of DMA channel name among "rx", "tx" or + "rx-tx". +- clocks: Should be a list of phandles of clocks used by the controller + (1). +- clock-names: Should be a list matching the clocks phandles list: + - "pclk" (peripheral clock) Required. + - "gclk" (generated clock) Optional (1). + - "aclk" (Audio PLL clock) Optional (1). + +Optional properties: +- pinctrl-0: Should specify pin control groups used for this controller. +- princtrl-names: Should contain only one value - "default". + + +(1) : Only the peripheral clock is required. The generated clock and the Audio + PLL clock are optional and should only be set together. + +Example: + + i2s@f8050000 { + compatible = "atmel,sama5d2-i2s"; + reg = <0xf8050000 0x300>; + interrupts = <54 IRQ_TYPE_LEVEL_HIGH 7>; + dmas = <&dma0 + (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | + AT91_XDMAC_DT_PERID(31))>, + <&dma0 + (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | + AT91_XDMAC_DT_PERID(32))>; + dma-names = "tx", "rx"; + clocks = <&i2s0_clk>, <&i2s0_gclk>, <&audio_pll_pmc>; + clock-names = "pclk", "gclk", "aclk"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_i2s0_default>; + };