Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / sound / rt5640.txt

diff --git a/kernel/Documentation/devicetree/bindings/sound/rt5640.txt b/kernel/Documentation/devicetree/bindings/sound/rt5640.txt
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+RT5640/RT5639 audio CODEC
+
+This device supports I2C only.
+
+Required properties:
+
+- compatible : One of "realtek,rt5640" or "realtek,rt5639".
+
+- reg : The I2C address of the device.
+
+- interrupts : The CODEC's interrupt output.
+
+Optional properties:
+
+- realtek,in1-differential
+- realtek,in2-differential
+  Boolean. Indicate MIC1/2 input are differential, rather than single-ended.
+
+- realtek,ldo1-en-gpios : The GPIO that controls the CODEC's LDO1_EN pin.
+
+Pins on the device (for linking into audio routes) for RT5639/RT5640:
+
+  * DMIC1
+  * DMIC2
+  * MICBIAS1
+  * IN1P
+  * IN1R
+  * IN2P
+  * IN2R
+  * HPOL
+  * HPOR
+  * LOUTL
+  * LOUTR
+  * SPOLP
+  * SPOLN
+  * SPORP
+  * SPORN
+
+Additional pins on the device for RT5640:
+
+  * MONOP
+  * MONON
+
+Example:
+
+rt5640 {
+       compatible = "realtek,rt5640";
+       reg = <0x1c>;
+       interrupt-parent = <&gpio>;
+       interrupts = <TEGRA_GPIO(W, 3) GPIO_ACTIVE_HIGH>;
+       realtek,ldo1-en-gpios =
+               <&gpio TEGRA_GPIO(V, 3) GPIO_ACTIVE_HIGH>;
+};