1Elantech I2C Touchscreen
2
3Required properties:
4- compatible: must be "elan,ekth3500".
5- reg: I2C address of the chip.
6- interrupt-parent: a phandle for the interrupt controller (see interrupt
7  binding[0]).
8- interrupts: interrupt to which the chip is connected (see interrupt
9  binding[0]).
10
11Optional properties:
12- wakeup-source: touchscreen can be used as a wakeup source.
13- pinctrl-names: should be "default" (see pinctrl binding [1]).
14- pinctrl-0: a phandle pointing to the pin settings for the device (see
15  pinctrl binding [1]).
16
17[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
18[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
19
20Example:
21	&i2c1 {
22		/* ... */
23
24		touchscreen@10 {
25			compatible = "elan,ekth3500";
26			reg = <0x10>;
27			interrupt-parent = <&gpio4>;
28			interrupts = <0x0 IRQ_TYPE_EDGE_FALLING>;
29			wakeup-source;
30		};
31
32		/* ... */
33	};
34