ASoC: es7241: add dt-bindings documentation for the es7241 adc

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/everest,es7241.txt b/Documentation/devicetree/bindings/sound/everest,es7241.txt
new file mode 100644 (file)
index 0000000..28f82cf
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/everest,es7241.txt
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+ES7241 i2s AD converter
+
+Required properties:
+- compatible : "everest,es7241"
+- VDDP-supply: regulator phandle for the VDDA supply
+- VDDA-supply: regulator phandle for the VDDP supply
+- VDDD-supply: regulator phandle for the VDDD supply
+
+Optional properties:
+- reset-gpios: gpio connected to the reset pin
+- m0-gpios   : gpio connected to the m0 pin
+- m1-gpios   : gpio connected to the m1 pin
+- everest,sdout-pull-down:
+   Format used by the serial interface is controlled by pulling
+   the sdout. If the sdout is pulled down, leftj format is used.
+   If this property is not provided, sdout is assumed to pulled
+   up and i2s format is used
+
+Example:
+
+linein: audio-codec@2 {
+       #sound-dai-cells = <0>;
+       compatible = "everest,es7241";
+       VDDA-supply = <&vcc_3v3>;
+       VDDP-supply = <&vcc_3v3>;
+       VDDD-supply = <&vcc_3v3>;
+       reset-gpios = <&gpio GPIOH_42>;
+};