ASoC: rt5645: add device tree support

RT5650/RT5645 audio CODEC

This device supports I2C only.

Required properties:

- compatible : One of "realtek,rt5645" or "realtek,rt5650".

- reg : The I2C address of the device.

- interrupts : The CODEC's interrupt output.

Optional properties:

- hp-detect-gpios:

  a GPIO spec for the external headphone detect pin. If jd-mode = 0,

  we will get the JD status by getting the value of hp-detect-gpios.

- realtek,in2-differential

  Boolean. Indicate MIC2 input are differential, rather than single-ended.

- realtek,dmic1-data-pin

  0: dmic1 is not used

  1: using IN2P pin as dmic1 data pin

  2: using GPIO6 pin as dmic1 data pin

  3: using GPIO10 pin as dmic1 data pin

  4: using GPIO12 pin as dmic1 data pin

- realtek,dmic2-data-pin

  0: dmic2 is not used

  1: using IN2N pin as dmic2 data pin

  2: using GPIO5 pin as dmic2 data pin

  3: using GPIO11 pin as dmic2 data pin

-- realtek,jd-mode : The JD mode of rt5645/rt5650

   0 : rt5645/rt5650 JD function is not used

   1 : Mode-0 (VDD=3.3V), two port jack detection

   2 : Mode-1 (VDD=3.3V), one port jack detection

   3 : Mode-2 (VDD=1.8V), one port jack detection

Pins on the device (for linking into audio routes) for RT5645/RT5650:

  * DMIC L1

  * DMIC R1

  * DMIC L2

  * DMIC R2

  * IN1P

  * IN1N

  * IN2P

  * IN2N

  * Haptic Generator

  * HPOL

  * HPOR

  * LOUTL

  * LOUTR

  * PDM1L

  * PDM1R

  * SPOL

  * SPOR

Example:

codec: rt5650@1a {

	compatible = "realtek,rt5650";

	reg = <0x1a>;

	hp-detect-gpios = <&gpio 19 0>;

	interrupt-parent = <&gpio>;

	interrupts = <7 IRQ_TYPE_EDGE_FALLING>;

	realtek,dmic-en = "true";

	realtek,en-jd-func = "true";

	realtek,jd-mode = <3>;

};

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