* EETI EXC3000 Multiple Touch Controller

Required properties:
- compatible: must be "eeti,exc3000"
- reg: i2c slave address
- interrupt-parent: the phandle for the interrupt controller
- interrupts: touch controller interrupt
- touchscreen-size-x: See touchscreen.txt
- touchscreen-size-y: See touchscreen.txt

Optional properties:
- touchscreen-inverted-x: See touchscreen.txt
- touchscreen-inverted-y: See touchscreen.txt
- touchscreen-swapped-x-y: See touchscreen.txt

Example:

	touchscreen@2a {
		compatible = "eeti,exc3000";
		reg = <0x2a>;
		interrupt-parent = <&gpio1>;
		interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
		touchscreen-size-x = <4096>;
		touchscreen-size-y = <4096>;
		touchscreen-inverted-x;
		touchscreen-swapped-x-y;
	};