DT binding documentation for this new ASoC driver.
Signed-off-by: Songjun Wu songjun.wu@atmel.com --- .../devicetree/bindings/sound/atmel-classd.txt | 73 ++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/atmel-classd.txt
diff --git a/Documentation/devicetree/bindings/sound/atmel-classd.txt b/Documentation/devicetree/bindings/sound/atmel-classd.txt new file mode 100644 index 0000000..29d181a --- /dev/null +++ b/Documentation/devicetree/bindings/sound/atmel-classd.txt @@ -0,0 +1,73 @@ +* Atmel ClassD driver under ALSA SoC architecture + +* Atmel ClassD driver +Required properties: +- compatible + Should be "atmel,sama5d2-classd". +- reg + Should contain ClassD registers location and length. +- interrupts + Should contain the IRQ line for the ClassD. +- dmas + One DMA specifiers as described in atmel-dma.txt and dma.txt files. +- dma-names + Must be "tx". +- clock-names + tuple listing input clock names. + Required elements: "pclk", "gclk" and "aclk". +- clocks + phandles to input clocks. + +Optional properties: +- pinctrl-names, pinctrl-0 + Please refer to pinctrl-bindings.txt. +- atmel,pwm-type + PWM modulation type, "single" or "diff". +- atmel,non-overlap-time + Set non-overlapping time, the unit is nanosecond(ns). + There are four values, + <5>, <10>, <15>, <20>, the default value is <10>. + Non-overlapping will be disabled if not specified. + +Example: +classd: classd@fc048000 { + compatible = "atmel,sama5d2-classd"; + reg = <0xfc048000 0x100>; + interrupts = <59 IRQ_TYPE_LEVEL_HIGH 7>; + dmas = <&dma0 + (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) + | AT91_XDMAC_DT_PERID(47))>; + dma-names = "tx"; + clocks = <&classd_clk>, <&classd_gclk>, <&audio_pll_pmc>; + clock-names = "pclk", "gclk", "aclk"; + + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_classd_default>; + atmel,pwm-type = "diff"; + atmel,non-overlap-time = <10>; +}; + + +* Atmel ASoC driver with ClassD +Required properties: +- compatible + Should be "atmel,asoc-classd". +- atmel,model + The user-visible name of this sound complex. +- atmel,audio-platform + Should be <&classd>. +- atmel,audio-cpu-dai-name + The name of the CPU DAI in ALSA SoC architecture. + The format is <classd registers location>.classd. +- atmel,audio-codec + Should be <&classd>. + +Example: +sound { + compatible = "atmel,asoc-classd"; + + atmel,model = "classd @ SAMA5D2-Xplained"; + atmel,audio-platform = <&classd>; + atmel,audio-cpu-dai-name = "fc048000.classd"; + atmel,audio-codec = <&classd>; +};