[PATCH 2/2] ASoC: rockchip-max98090: add documentation for rockchip-max98090 driver

[Jianqun <jay.xu-TNX95d0MmH7DzftRWevZcw@public.gmane.org>]

Add documentation for rockchip-max98090 driver, which is need by rockchip
board using a max98090.

Signed-off-by: Jianqun Xu <jay.xu-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---
 .../sound/rockchip,rockchip-audio-max98090.txt     | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/rockchip,rockchip-audio-max98090.txt

diff --git a/Documentation/devicetree/bindings/sound/rockchip,rockchip-audio-max98090.txt b/Documentation/devicetree/bindings/sound/rockchip,rockchip-audio-max98090.txt
new file mode 100644
index 0000000..e12d1a0
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/rockchip,rockchip-audio-max98090.txt
@@ -0,0 +1,23 @@
+ROCKCHIP audio complex, with MAX98090 CODEC
+
+Required properties:
+- compatible : must be "rockchip,rockchip-audio-max98090"
+- rockchip,model : the user-visible name of this sound complex
+- rockchip,i2s-controller : The phandle of the rockchip I2S controller
+  that's connected to the CODEC.
+- rockchip,audio-codec : The phandle of the MAX98090 audio codec.
+
+Optional properties:
+- rockchip,hp-det-gpios : The GPIO that detect headphones are plugged in
+- rockchip,mic-det-gpios : The GPIO that detect micphones are plugged in
+
+Example:
+
+sound {
+	compatible = "rockchip,rockchip-audio-max98090";
+	rockchip,model = "ROCKCHIP-I2S";
+	rockchip,i2s-controller = <&i2s>;
+	rockchip,audio-codec = <&max98090>;
+	rockchip,hp-det-gpios = <&gpio6 5 GPIO_ACTIVE_HIGH>;
+	rockchip,mic-det-gpios = <&gpio6 11 GPIO_ACTIVE_HIGH>;
+};
-- 
1.9.1


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