act8846 Power Management Integrated Circuit

Required properties:
- compatible: "act,act8846" 
- reg: I2C slave address
- gpios: the interrupt pin or sleep pin
  use gpio get IRQ number
- regulators: This is the list of child nodes that specify the regulator
  initialization data for defined regulators. Not all regulators for the given
  device need to be present. The definition for each of these nodes is defined
  using the standard binding for regulators found at
  Documentation/devicetree/bindings/regulator/regulator.txt.
  The regulator is matched with the regulator-compatible.

  The valid regulator-compatible values are:
  act8846: act_dcdc1, act_dcdc2, act_dcdc3, act_dcdc4, act_ldo1, act_ldo2, act_ldo3, act_ldo4, act_ldo5, act_ldo6,
            act_ldo7, act_ldo8

Optional properties:
- gpios: 
	gpios 0 :vsel pin gpio
	use vsel pin switch dcdc voltage when reset or power down
- regulator-initial-mode: default mode to set on startup
- regulator-initial-state: suspend state to set at init
- regulator-state-mem, regulator-state-disk, regulator-state-standby:
	defines regulator suspend to memory, suspend to disk (hibernate) and standby respectively.
	have following sub-constarints:
	- regulator-state-uv: suspend voltage
	- regulator-state-mode: suspend regulator operating mode
	- regulator-state-enabled: is regulator enabled in this suspend state
	- regulator-state-disabled: is the regulator disbled in this suspend state
-regulator-initial-mode and regulator-state-mode is set as:
	REGULATOR_MODE_FAST			0x1
	REGULATOR_MODE_NORMAL			0x2
	REGULATOR_MODE_IDLE			0x4
	REGULATOR_MODE_STANDBY			0x8
 
Example:

		act8846: act8846@5a {
		reg = <0x5a>;
		status = "okay";
	};

	gpios =<&gpio3 GPIO_D3 GPIO_ACTIVE_LOW>; 
&act8846{

	compatible = "act,act8846";

	regulators {
	
		#address-cells = <1>;
		#size-cells = <0>;	

		 dcdc1_reg: regulator@0{
			reg = <0>;
			regulator-compatible= "act_dcdc1";
		};

		dcdc2_reg: regulator@1 {
			reg = <1>;
			regulator-compatible = "act_dcdc2";	
			regulator-min-microvolt = <800000>;
			regulator-max-microvolt = <1500000>;
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
				regulator-state-uv = <1200000>;
			};		
		};

		dcdc3_reg: regulator@2 {
			reg = <2>;
			regulator-compatible = "act_dcdc3";
			regulator-min-microvolt = <800000>;
			regulator-max-microvolt = <1500000>;
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
				regulator-state-uv = <1200000>;
			};		
		};

		dcdc4_reg: regulator@3 {
			reg = <3>;
			regulator-compatible = "act_dcdc4";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
				regulator-state-uv = <3300000>;
			};
		};

		ldo1_reg: regulator@4 {
			reg = <4>;
			regulator-compatible= "act_ldo1";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
			};
		};

		ldo2_reg: regulator@5 {
			reg = <5>;
			regulator-compatible = "act_ldo2";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
			};
		};

		ldo3_reg: regulator@6 {
			reg = <6>;
			regulator-compatible = "act_ldo3";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
			};
		};

		ldo4_reg:regulator@7 {
			reg = <7>;
			regulator-compatible = "act_ldo4";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
			};
		};

		ldo5_reg: regulator@8 {
			reg = <8>;
			regulator-compatible= "act_ldo5";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
			};
		};

		ldo6_reg: regulator@9 {
			reg = <9>;
			regulator-compatible = "act_ldo6";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
			};
		};

		ldo7_reg: regulator@10 {
			reg = <10>;
			regulator-compatible = "act_ldo7";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
			};
		};

		ldo8_reg: regulator@11 {
			reg = <11>;
			regulator-compatible = "act_ldo8";
			regulator-initial-state = <3>;
			regulator-state-mem {
				regulator-state-enabled;
			};
		};
	};
		
};