Qualcomm PON Device

The Power On device for Qualcomm PM8xxx is MFD supporting pwrkey
and resin along with the Android reboot-mode.

This DT node has pwrkey and resin as sub nodes.

Required Properties:
-compatible: Must be one of:
	"qcom,pm8916-pon"
	"qcom,pms405-pon"

-reg: Specifies the physical address of the pon register

Optional subnode:
-pwrkey: Specifies the subnode pwrkey and should follow the
 qcom,pm8941-pwrkey.txt description.
-resin: Specifies the subnode resin and should follow the
 qcom,pm8xxx-pwrkey.txt description.

The rest of the properties should follow the generic reboot-mode description
found in reboot-mode.txt

Example:

	pon@800 {
		compatible = "qcom,pm8916-pon";

		reg = <0x800>;
		mode-bootloader = <0x2>;
		mode-recovery = <0x1>;

		pwrkey {
			compatible = "qcom,pm8941-pwrkey";
			interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
			debounce = <15625>;
			bias-pull-up;
			linux,code = <KEY_POWER>;
		};

		resin {
			compatible = "qcom,pm8941-resin";
			interrupts = <0x0 0x8 1 IRQ_TYPE_EDGE_BOTH>;
			debounce = <15625>;
			bias-pull-up;
			linux,code = <KEY_VOLUMEDOWN>;
		};
	};