ASoC: samsung: Add DT bindings documentation for TM2 sound subsystem

This patch adds DT binding documentation for Exnos5433 based TM2
and TM2E boards sound subsystem.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/samsung,tm2-audio.txt b/Documentation/devicetree/bindings/sound/samsung,tm2-audio.txt
new file mode 100644
index 000000000000..94442e5673b3
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/samsung,tm2-audio.txt
@@ -0,0 +1,38 @@
+Samsung Exynos5433 TM2(E) audio complex with WM5110 codec
+
+Required properties:
+
+ - compatible            : "samsung,tm2-audio"
+ - model                 : the user-visible name of this sound complex
+ - audio-codec           : the phandle of the wm5110 audio codec node,
+                           as described in ../mfd/arizona.txt
+ - i2s-controller        : the phandle of the I2S controller
+ - audio-amplifier       : the phandle of the MAX98504 amplifier
+ - samsung,audio-routing : a list of the connections between audio components;
+                           each entry is a pair of strings, the first being the
+                           connection's sink, the second being the connection's
+                           source; valid names for sources and sinks are the
+                           WM5110's and MAX98504's pins and the jacks on the
+                           board: HP, SPK, Main Mic, Sub Mic, Third Mic,
+                           Headset Mic
+ - mic-bias-gpios        : GPIO pin that enables the Main Mic bias regulator
+
+
+Example:
+
+sound {
+        compatible = "samsung,tm2-audio";
+        audio-codec = <&wm5110>;
+        i2s-controller = <&i2s0>;
+        audio-amplifier = <&max98504>;
+        mic-bias-gpios = <&gpr3 2 0>;
+        model = "wm5110";
+        samsung,audio-routing =
+                "HP", "HPOUT1L",
+                "HP", "HPOUT1R",
+                "SPK", "SPKOUT",
+                "SPKOUT", "HPOUT2L",
+                "SPKOUT", "HPOUT2R",
+                "Main Mic", "MICBIAS2",
+                "IN1R", "Main Mic";
+};