ROCKCHIP multicodecs audio

Required properties:
- compatible: "rockchip,multicodecs-card"
- rockchip,cpu: The phandle of the Rockchip I2S/PDM controller that's
  connected to the CODEC
- rockchip,codec: The phandle of audio codecs

Optional properties:
- rockchip,card-name: User specified audio sound card name, one string property.
- rockchip,codec-hp-det : Detect the headphone via internal codec.
- rockchip,wait-card-locked : This is a variable length array, user specified
			      these sound cards need to be prepared and locked,
			      otherwise the local slave card can be probed.
- rockchip,audio-routing : sound card dapm routing.
- hp-det-gpio : headphone detect gpio.
- io-channels : headset mic/key detect adc channel.
- io-channel-names : headset mic/key adc channel name.
- spk-con-gpio : speaker enable/disabled gpio.
- hp-con-gpio : headphone enable/disabled gpio.
- keyup-threshold-microvolt: keyup-threshold-microvolt uV.
- poll-interval : headset adc key poller internal ms.
- play-pause-key : PLAYPAUSE key, can define the other key like vol+/vol- and so on.


Optional dai-link subnode properties:
- rockchip,format			: CPU/CODEC common audio format.
					  "i2s", "right_j", "left_j" , "dsp_a"
					  "dsp_b", "ac97", "pdm", "msb", "lsb".
- rockchip,frame-master			: Indicates dai-link frame master.
					  phandle to a cpu or codec subnode.
- rockchip,bitclock-master		: Indicates dai-link bit clock master.
					  phandle to a cpu or codec subnode.
- rockchip,bitclock-inversion		: bool property. Add this if the
					  dai-link uses bit clock inversion.
- rockchip,frame-inversion		: bool property. Add this if the
					  dai-link uses frame clock inversion.
- rockchip,mclk-fs			: Multiplication factor between stream
					  rate and codec mclk, applied only for
					  the dai-link.
- rockchip,mclk-fs-mapping		: u32 properties. Multiplication factor
					  between steam rate and codec mclk,
					  these values will overwrite the mclk-fs.
					  mclk-fs-mapping = <256 1024> means:
					  (mclk of first codec) = 256 * fs,
					  (mclk of second codec) = 1024 * fs.

Example:

sound {
	compatible = "rockchip,multicodecs-card";
	rockchip,mclk-fs = <256>;
	rockchip,cpu = <&i2s0_8ch>;
	rockchip,codec = <&codec>, <&vad>;
};

Example 2 :

es8388_sound: es8388-sound {
	status = "okay";
	compatible = "rockchip,multicodecs-card";
	rockchip,card-name = "rockchip-es8388";
	hp-det-gpio = <&gpio1 RK_PD5 GPIO_ACTIVE_LOW>;
	io-channels = <&saradc 3>;
	io-channel-names = "adc-detect";
	spk-con-gpio = <&gpio1 RK_PD3 GPIO_ACTIVE_HIGH>;
	hp-con-gpio = <&gpio1 RK_PD2 GPIO_ACTIVE_HIGH>;
	rockchip,format = "i2s";
	rockchip,mclk-fs = <256>;
	rockchip,cpu = <&i2s0_8ch>;
	rockchip,codec = <&es8388>;
	rockchip,audio-routing =
                        "Headphone", "LOUT1",
                        "Headphone", "ROUT1",
                        "Speaker", "LOUT2",
                        "Speaker", "ROUT2",
                        "Headphone", "Headphone Power",
                        "Headphone", "Headphone Power",
                        "Speaker", "Speaker Power",
                        "Speaker", "Speaker Power",
                        "LINPUT1", "Main Mic",
                        "LINPUT2", "Main Mic",
                        "RINPUT1", "Headset Mic",
                        "RINPUT2", "Headset Mic";
        pinctrl-names = "default";
        pinctrl-0 = <&hp_det>;
        keyup-threshold-microvolt = <1800000>;
        poll-interval = <100>;
        play-pause-key{
                label = "playpause";
                linux,code = <KEY_PLAYPAUSE>;
                press-threshold-microvolt = <2000>;
	};
};

Example 3 for rockchip,mclk-fs-mapping:

sai_dais: sai-dais {
	status = "okay";
	compatible = "rockchip,multi-dais";
	dais = <&sai1>, <&sai4>;
	capture,channel-mapping = <2 2>;
	playback,channel-mapping = <2 0>;
	bitclock-inversion = <0 0>;
	mclk-fs-mapping = <256 1024>;
};

es8388_sound: es8388-sound {
	status = "okay";
	compatible = "rockchip,multicodecs-card";
	rockchip,card-name = "rockchip-es8388";
	spk-con-gpio = <&gpio1 RK_PC6 GPIO_ACTIVE_HIGH>;
	rockchip,pre-power-on-delay-ms = <30>;
	rockchip,post-power-down-delay-ms = <40>;
	rockchip,format = "i2s";
	rockchip,cpu = <&sai_dais>;
	rockchip,codec = <&es8388>, <&audio_codec>;
	rockchip,mclk-fs = <256>;
	rockchip,mclk-fs-mapping = <256 1024>;
	rockchip,audio-routing =
		"Speaker", "LOUT1",
		"Speaker", "ROUT1",
		"Speaker", "Speaker Power",
		"Speaker", "Speaker Power",
		"LINPUT1", "Main Mic",
		"LINPUT2", "Main Mic",
		"RINPUT1", "Main Mic",
		"RINPUT2", "Main Mic";
	pinctrl-names = "default";
	pinctrl-0 = <&spk_ctrl>;
};