1Samsung tm2-touchkey
2
3Required properties:
4- compatible: must be "cypress,tm2-touchkey"
5- reg: I2C address of the chip.
6- interrupts: interrupt to which the chip is connected (see interrupt
7	binding[0]).
8- vcc-supply : internal regulator output. 1.8V
9- vdd-supply : power supply for IC 3.3V
10
11[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
12
13Example:
14	&i2c0 {
15		/* ... */
16
17		touchkey@20 {
18			compatible = "cypress,tm2-touchkey";
19			reg = <0x20>;
20			interrupt-parent = <&gpa3>;
21			interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
22			vcc-supply=<&ldo32_reg>;
23			vdd-supply=<&ldo33_reg>;
24		};
25	};
26