linux-libre/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt

* Rohm BU21013 Touch Screen

Required properties:
 - compatible              : "rohm,bu21013_tp"
 - reg                     :  I2C device address

Optional properties:
 - touch-gpio              : GPIO pin registering a touch event
 - <supply_name>-supply    : Phandle to a regulator supply
 - rohm,touch-max-x        : Maximum outward permitted limit in the X axis
 - rohm,touch-max-y        : Maximum outward permitted limit in the Y axis
 - rohm,flip-x             : Flip touch coordinates on the X axis
 - rohm,flip-y             : Flip touch coordinates on the Y axis

Example:

	i2c@80110000 {
		bu21013_tp@0x5c {
			compatible = "rohm,bu21013_tp";
			reg = <0x5c>;
			touch-gpio = <&gpio2 20 0x4>;
			avdd-supply = <&ab8500_ldo_aux1_reg>;

			rohm,touch-max-x = <384>;
			rohm,touch-max-y = <704>;
			rohm,flip-y;
		};
	};