* Mediatek Technologies mt6357 ALSA SoC audio accdet driver

This node models the Mediatek Technologies mt6357 ALSA SoC audio accdet driver

Required properties:

  - compatible : One of "mediatek,mt6357-accdet", "mediatek,pmic-accdet"

  - accdet-name : named as "mt63xx-accdet" for snd_soc_card_jack

  - accdet-mic-vol : accdet micbias voltage
			0x09:2.85v 0x08:2.8v 0x07:2.7v 0x05:2.5v 0x02:1.9v

  - accdet-mic-mode : value as 1, 2, 6 to indicate ACC/DCC mode.
            default is DCC mode 2
			1:ACC mode, 2:low cost without in bias, 6:low cost with in bias

  - eint_use_ext_res : select VTH to 2v and 500k, default 0 use internal resistance.

  - headset-mode-setting : Indicates customized pwm, debounce setting
			accdet pwm_width, pwm_thresh, fall_delay, rise_delay
			debounce0, debounce1, debounce3, debounce4
			eint pwm_width, eint pwm_thresh
			eint deb(debounce0, debounce1, debounce2, debounce3), inv_debounce

  - headset-three-key-threshold :  For 3key CDD device and define its threshold.
			0--MD_MAX--UP_MAX--DW_MAX

  - io-channels : declare which iio channel accdet used.

  - io-channel-names : named as "pmic_accdet"

  - nvmem : reference to pmic efuse node

  - nvmen-names : named as "mt63xx-accdet-efuse"

Optional properties:

  - accdet-plugout-debounce : For using ap gpio eint only, it is sw debounce time.

  - headset-three-key-threshold-CDD : For 3key CDD device and define its threshold.
			threshold: 0--MD_MAX--UP_MAX--DW_MAX
  - headset-four-key-threshold : For 4key device and define its threshold.
			threshold: 0--MD_MAX--VOICE_MAX--UP_MAX--DW_MAX
Example:
&pwrap {
	pmic: pmic {
		pmic_accdet: pmic_accdet {
			compatible = "mediatek,mt6357-accdet";
			accdet-name = "mt63xx-accdet";
			accdet-mic-vol = <8>;
			accdet-plugout-debounce = <1>;
			accdet-mic-mode = <2>;
			eint_use_ext_res = <0>;
			headset-mode-setting = <0x500 0x500 1 0x1f0
						0x800 0x800 0x20 0x44
						0x4 0x1
						0x5 0x3 0x3 0x5 0xe>;
			headset-three-key-threshold = <0 80 220 400>;
			io-channels = <&pmic_auxadc AUXADC_ACCDET>;
			io-channel-names = "pmic_accdet";
			nvmem = <&pmic_efuse>;
			nvmen-names = "mt63xx-accdet-efuse";
			status = "okay";
		};
	};
};