ASoC: ak4104: add DT bindings

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/ak4104.txt b/Documentation/devicetree/bindings/sound/ak4104.txt
new file mode 100644
index 000000000000..1f8e5066d443
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/ak4104.txt
@@ -0,0 +1,17 @@
+AK4104 S/PDIF transmitter
+
+This device supports SPI mode only.
+
+Required properties:
+
+  - compatible : "asahi-kasei,ak4104"
+
+  - reg : The chip select number on the SPI bus
+
+Example:
+
+spdif: ak4104@0 {
+	compatible = "asahi-kasei,ak4104";
+	reg = <0>;
+	spi-max-frequency = <5000000>;
+};