ASoC: codecs: add wm8524 codec driver

WM8524 is a 24-bit 192KHz stereo digital/analog converter (DAC) with
integral charge pump and a simple hardware control interface.
Product information can be found at:
https://www.cirrus.com/products/wm8524/

Signed-off-by: Mihai Serban <mihai.serban@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/wm8524.txt b/Documentation/devicetree/bindings/sound/wm8524.txt
new file mode 100644
index 000000000000..20c62002cbcd
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/wm8524.txt
@@ -0,0 +1,16 @@
+WM8524 audio CODEC
+
+This device does not use I2C or SPI but a simple Hardware Control Interface.
+
+Required properties:
+
+  - compatible : "wlf,wm8524"
+
+  - wlf,mute-gpios: a GPIO spec for the MUTE pin.
+
+Example:
+
+codec: wm8524@0 {
+	compatible = "wlf,wm8524";
+	wlf,mute-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
+};