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LEDs connected to pca9633 or pca9632

Required properties:
- compatible : should be : "nxp,pca963x"

Optional properties:
- nxp,totem-pole : use totem pole (push-pull) instead of default open-drain
- nxp,hw-blink : use hardware blinking instead of software blinking

Each led is represented as a sub-node of the nxp,pca9633 device.

LED sub-node properties:
- label : (optional) see Documentation/devicetree/bindings/leds/common.txt
- reg : number of LED line (could be from 0 to 4)
- linux,default-trigger : (optional)
   see Documentation/devicetree/bindings/leds/common.txt

Examples:

pca9632: pca9632 {
	compatible = "nxp,pca9632", "nxp,pca963x";
	#address-cells = <1>;
	#size-cells = <0>;
	reg = <0x62>;

	red@0 {
		label = "red";
		reg = <0>;
		linux,default-trigger = "none";
	};
	green@1 {
		label = "green";
		reg = <1>;
		linux,default-trigger = "none";
	};
	blue@2 {
		label = "blue";
		reg = <2>;
		linux,default-trigger = "none";
	};
	unused@3 {
		label = "unused";
		reg = <3>;
		linux,default-trigger = "none";
	};
};