ASoC: Add bindings for PCM1789

Add a device-tree binding for Texas Instrument's PCM1789 codec.
For the moment, only I2C bus is supported but SPI could be added
in future.

Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/pcm1789.txt b/Documentation/devicetree/bindings/sound/pcm1789.txt
new file mode 100644 (file)
index 0000000..3c74ed2
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/pcm1789.txt
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+Texas Instruments pcm1789 DT bindings
+
+PCM1789 is a simple audio codec that can be connected via
+I2C or SPI. Currently, only I2C bus is supported.
+
+Required properties:
+
+ - compatible: "ti,pcm1789"
+
+Required properties on I2C:
+
+ - reg: the I2C address
+ - reset-gpios: GPIO to control the RESET pin
+
+Examples:
+
+       audio-codec@4c {
+               compatible = "ti,pcm1789";
+               reg = <0x4c>;
+               reset-gpios = <&gpio2 14 GPIO_ACTIVE_LOW>;
+               #sound-dai-cells = <0>;
+       };