* Pixart PMT9123 Optical Track Sensor Device-Tree Bindings

Required Properties:
- compatible:		"pixart,pmt9123"
- reg:			I2C address of chip.
- reset-gpios:		The reset gpio to the chip.
			Documentation/devicetree/bindings/gpio/gpio.txt
- motion-gpios:		The motion/interrupt gpio from the chip.
			Documentation/devicetree/bindings/gpio/gpio.txt
- *-input-code		At leaste one *-input-code property must be specified.
			See Optional Properties.

Optional Properties:
- x-input-code		Relative input code to emit for x-axis movement.
			If omitted, no input event is emitted.
- y-input-code		Relative input code to emit for y-axis movement.
			If omitted, no input event is emitted.
- resolution		Chip-specific resolution specifier.
			Passed directly to chip.
- x-y-swap		Boolean: Swap X and Y.
- x-invert		Boolean: Invert X direction.
- y-invert		Boolean: Invert Y direction.


Example:
	&i2c1 {
		/* ... */

		pmt9123@33 {
			compatible = "pixart,pmt9123";
			reg = <0x33>;
			reset-gpios = <&gpio1 3 0>;
			motion-gpios = <&gpio1 4 0>;
			x-input-code = <0x00>;
			y-input-code = <0x01>;
			resolution = <0x10>;
			x-y-swap;
			x-invert;
			y-invert;
		};

		/* ... */
	};