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diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-rt5640.txt b/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-rt5640.txt
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+NVIDIA Tegra audio complex, with RT5640 CODEC
+
+Required properties:
+- compatible : "nvidia,tegra-audio-rt5640"
+- clocks : Must contain an entry for each entry in clock-names.
+- clock-names : Must include the following entries:
+  "pll_a" (The Tegra clock of that name),
+  "pll_a_out0" (The Tegra clock of that name),
+  "mclk" (The Tegra cdev1/extern1 clock, which feeds the CODEC's mclk)
+- nvidia,model : The user-visible name of this sound complex.
+- nvidia,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 RT5640's pins, and the jacks on the board:
+
+  RT5640 pins:
+
+  * DMIC1
+  * DMIC2
+  * MICBIAS1
+  * IN1P
+  * IN1R
+  * IN2P
+  * IN2R
+  * HPOL
+  * HPOR
+  * LOUTL
+  * LOUTR
+  * MONOP
+  * MONON
+  * SPOLP
+  * SPOLN
+  * SPORP
+  * SPORN
+
+  Board connectors:
+
+  * Headphones
+  * Speakers
+
+- nvidia,i2s-controller : The phandle of the Tegra I2S controller that's
+  connected to the CODEC.
+- nvidia,audio-codec : The phandle of the RT5640 audio codec. This binding
+  assumes that AIF1 on the CODEC is connected to Tegra.
+
+Optional properties:
+- nvidia,hp-det-gpios : The GPIO that detects headphones are plugged in
+
+Example:
+
+sound {
+	compatible = "nvidia,tegra-audio-rt5640-dalmore",
+			"nvidia,tegra-audio-rt5640";
+	nvidia,model = "NVIDIA Tegra Dalmore";
+
+	nvidia,audio-routing =
+		"Headphones", "HPOR",
+		"Headphones", "HPOL",
+		"Speakers", "SPORP",
+		"Speakers", "SPORN",
+		"Speakers", "SPOLP",
+		"Speakers", "SPOLN";
+
+	nvidia,i2s-controller = <&tegra_i2s1>;
+	nvidia,audio-codec = <&rt5640>;
+
+	nvidia,hp-det-gpios = <&gpio 143 0>; /* GPIO PR7 */
+
+	clocks = <&tegra_car 216>, <&tegra_car 217>, <&tegra_car 120>;
+	clock-names = "pll_a", "pll_a_out0", "mclk";
+};