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Motorola CPCAP PMIC battery charger binding

Required properties:
- compatible: Shall be "motorola,mapphone-cpcap-charger"
- interrupts: Interrupt specifier for each name in interrupt-names
- interrupt-names: Should contain the following entries:
		   "chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",
		   "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
		   "battdetb"
- io-channels: IIO ADC channel specifier for each name in io-channel-names
- io-channel-names: Should contain the following entries:
		    "battdetb", "battp", "vbus", "chg_isense", "batti"

Optional properties:
- mode-gpios: Optionally CPCAP charger can have a companion wireless
	      charge controller that is controlled with two GPIOs
	      that are active low.

Example:

cpcap_charger: charger {
	compatible = "motorola,mapphone-cpcap-charger";
	interrupts-extended = <
		&cpcap 13 0 &cpcap 12 0 &cpcap 29 0 &cpcap 28 0
		&cpcap 22 0 &cpcap 21 0 &cpcap 20 0 &cpcap 19 0
		&cpcap 54 0
	>;
	interrupt-names =
		"chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",
		"rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
		"battdetb";
	mode-gpios = <&gpio3 29 GPIO_ACTIVE_LOW
		      &gpio3 23 GPIO_ACTIVE_LOW>;
	io-channels = <&cpcap_adc 0 &cpcap_adc 1
		       &cpcap_adc 2 &cpcap_adc 5
		       &cpcap_adc 6>;
	io-channel-names = "battdetb", "battp",
			   "vbus", "chg_isense",
			   "batti";
};