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Documentation/devicetree/bindings/sound/sun8i-a33-codec.txt
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Allwinner SUN8I audio codec | ||
------------------------------------ | ||
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On Sun8i-A33 SoCs, the audio is separated in different parts: | ||
- A DAI driver. It uses the "sun4i-i2s" driver which is | ||
documented here: | ||
Documentation/devicetree/bindings/sound/sun4i-i2s.txt | ||
- An analog part of the codec which is handled as PRCM registers. | ||
See Documentation/devicetree/bindings/sound/sun8i-codec-analog.txt | ||
- An digital part of the codec which is documented in this current | ||
binding documentation. | ||
- And finally, an audio card which links all the above components. | ||
The simple-audio card will be used. | ||
See Documentation/devicetree/bindings/sound/simple-card.txt | ||
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This bindings documentation exposes Sun8i codec (digital part). | ||
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Required properties: | ||
- compatible: must be "allwinner,sun8i-a33-codec" | ||
- reg: must contain the registers location and length | ||
- interrupts: must contain the codec interrupt | ||
- clocks: a list of phandle + clock-specifer pairs, one for each entry | ||
in clock-names. | ||
- clock-names: should contain followings: | ||
- "bus": the parent APB clock for this controller | ||
- "mod": the parent module clock | ||
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Here is an example to add a sound card and the codec binding on sun8i SoCs that | ||
are similar to A33 using simple-card: | ||
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sound { | ||
compatible = "simple-audio-card"; | ||
simple-audio-card,name = "sun8i-a33-audio"; | ||
simple-audio-card,format = "i2s"; | ||
simple-audio-card,frame-master = <&link_codec>; | ||
simple-audio-card,bitclock-master = <&link_codec>; | ||
simple-audio-card,mclk-fs = <512>; | ||
simple-audio-card,aux-devs = <&codec_analog>; | ||
simple-audio-card,routing = | ||
"Left DAC", "Digital Left DAC", | ||
"Right DAC", "Digital Right DAC"; | ||
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simple-audio-card,cpu { | ||
sound-dai = <&dai>; | ||
}; | ||
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link_codec: simple-audio-card,codec { | ||
sound-dai = <&codec>; | ||
}; | ||
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soc@01c00000 { | ||
[...] | ||
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audio-codec@1c22e00 { | ||
#sound-dai-cells = <0>; | ||
compatible = "allwinner,sun8i-a33-codec"; | ||
reg = <0x01c22e00 0x400>; | ||
interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>; | ||
clocks = <&ccu CLK_BUS_CODEC>, <&ccu CLK_AC_DIG>; | ||
clock-names = "bus", "mod"; | ||
}; | ||
}; | ||
|
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