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NVIDIA Tegra audio complex

Required properties:
- compatible : "nvidia,tegra-audio-alc5632"
- clocks : Must contain an entry for each entry in clock-names.
  See ../clocks/clock-bindings.txt for details.
- clock-names : Must include the following entries:
  - pll_a
  - pll_a_out0
  - 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 ALC5632's pins as documented in the binding for the device
  and:

  * Headset Stereophone
  * Int Spk
  * Headset Mic
  * Digital Mic

- nvidia,i2s-controller : The phandle of the Tegra I2S controller
- nvidia,audio-codec : The phandle of the ALC5632 audio codec

Example:

sound {
	compatible = "nvidia,tegra-audio-alc5632-paz00",
				 "nvidia,tegra-audio-alc5632";

	nvidia,model = "Compal PAZ00";

	nvidia,audio-routing =
				"Int Spk", "SPK_OUTP",
				"Int Spk", "SPK_OUTN",
				"Headset Mic","MICBIAS1",
				"MIC1_N", "Headset Mic",
				"MIC1_P", "Headset Mic",
				"Headset Stereophone", "HP_OUT_R",
				"Headset Stereophone", "HP_OUT_L";

	nvidia,i2s-controller = <&tegra_i2s1>;
	nvidia,audio-codec = <&alc5632>;

	clocks = <&tegra_car 112>, <&tegra_car 113>, <&tegra_car 93>;
	clock-names = "pll_a", "pll_a_out0", "mclk";
};