ASoC: uniphier: add DT bindings documentation for UniPhier EVEA

This patch adds DT binding documentation for UniPhier EVEA
that is SoC inner sound codec of UniPhier series.

Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/uniphier,evea.txt b/Documentation/devicetree/bindings/sound/uniphier,evea.txt
new file mode 100644 (file)
index 0000000..3f31b23
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/uniphier,evea.txt
@@ -0,0 +1,26 @@
+Socionext EVEA - UniPhier SoC internal codec driver
+
+Required properties:
+- compatible      : should be "socionext,uniphier-evea".
+- reg             : offset and length of the register set for the device.
+- clock-names     : should include following entries:
+                    "evea", "exiv"
+- clocks          : a list of phandle, should contain an entry for each
+                    entries in clock-names.
+- reset-names     : should include following entries:
+                    "evea", "exiv", "adamv"
+- resets          : a list of phandle, should contain reset entries of
+                    reset-names.
+- #sound-dai-cells: should be 1.
+
+Example:
+
+       codec {
+               compatible = "socionext,uniphier-evea";
+               reg = <0x57900000 0x1000>;
+               clock-names = "evea", "exiv";
+               clocks = <&sys_clk 41>, <&sys_clk 42>;
+               reset-names = "evea", "exiv", "adamv";
+               resets = <&sys_rst 41>, <&sys_rst 42>, <&adamv_rst 0>;
+               #sound-dai-cells = <1>;
+       };