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dt-bindings: ASoC: Add Spreadtrum DMA platform documentation

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Add documentation for Spreadtrum DMA platform driver.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Baolin Wang 2019-01-29 16:04:44 +08:00 committed by Mark Brown
parent 7df04ea7a3
commit 27e27e6555
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Documentation/devicetree/bindings/sound/sprd-pcm.txt Normal file
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* Spreadtrum DMA platfrom bindings
Required properties:
- compatible: Should be "sprd,pcm-platform".
- dmas: Specify the list of DMA controller phandle and DMA request line ordered pairs.
- dma-names: Identifier string for each DMA request line in the dmas property.
These strings correspond 1:1 with the ordered pairs in dmas.
Example:
audio_platform:platform@0 {
compatible = "sprd,pcm-platform";
dmas = <&agcp_dma 1 1>, <&agcp_dma 2 2>,
<&agcp_dma 3 3>, <&agcp_dma 4 4>,
<&agcp_dma 5 5>, <&agcp_dma 6 6>,
<&agcp_dma 7 7>, <&agcp_dma 8 8>,
<&agcp_dma 9 9>, <&agcp_dma 10 10>;
dma-names = "normal_p_l", "normal_p_r",
"normal_c_l", "normal_c_r",
"voice_c", "fast_p",
"loop_c", "loop_p",
"voip_c", "voip_p";
};