ASoC: wm8974: add binding for WM8974 codec

This adds a binding for the Wolfson WM8974 mono audio codec.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/wlf,wm8974.txt b/Documentation/devicetree/bindings/sound/wlf,wm8974.txt
new file mode 100644 (file)
index 0000000..01d3a7c
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+++ b/Documentation/devicetree/bindings/sound/wlf,wm8974.txt
@@ -0,0 +1,15 @@
+WM8974 audio CODEC
+
+This device supports both I2C and SPI (configured with pin strapping
+on the board).
+
+Required properties:
+  - compatible: "wlf,wm8974"
+  - reg: the I2C address or SPI chip select number of the device
+
+Examples:
+
+codec: wm8974@1a {
+       compatible = "wlf,wm8974";
+       reg = <0x1a>;
+};