Sound: Odroid: add DT binding document for Odroid

This patch adds binding document for the Samsung OdroidX2/U3.

Change-Id: Ifd4cb398e939c14deb717bcb34d0ebb5a4cbb70e
Signed-off-by: Chen Zhen <zhen1.chen@samsung.com>

diff --git a/Documentation/devicetree/bindings/sound/samsung,odroidx2-max98090.txt b/Documentation/devicetree/bindings/sound/samsung,odroidx2-max98090.txt
new file mode 100644 (file)
index 0000000..73a8914
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/samsung,odroidx2-max98090.txt
@@ -0,0 +1,17 @@
+Samsung OdroidX2/U3 audio complex
+
+Required properties:
+ - compatible:
+       "samsung,odroidx2-audio" - for odroidx2 board
+       "samsung,odroidu3-audio" - for odroidu3 board
+ - samsung,i2s-controller: the phandle of the I2S controller
+ - samsung,audio-codec: the phandle of the max98090 audio codec
+
+Example:
+
+sound {
+       compatible = "samsung,odroidx2-audio";
+       samsung,i2s-controller = <&i2s0>;
+       samsung,audio-codec = <&max98090>;
+};
+