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dt-bindings: sound: rk3308_codec: add some descriptions for external micbias

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Change-Id: If4ef8c5d149390adf207710246bf3c2289d8c95d
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
This commit is contained in:
Xing Zheng
2019-03-27 20:00:08 +08:00
committed by Tao Huang
parent 14f9b005bc
commit 53c5b92aa2
1 changed files with 2 additions and 0 deletions
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Documentation/devicetree/bindings/sound/rockchip,rk3308-codec.txt
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@@ -56,6 +56,8 @@ Optional properties:
- rockchip,delay-pa-drv-ms: This property points out that the delay for
power on amplifier
- spk-ctl-gpios: The gpio of speak controller.
- micbias-en-gpios: The GPIO to enable external micbias.
- vmicbias-supply: The phandle to the regulator to handle external micbias.
Example for rk3308 internal codec: