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
8 - vcc-supply : internal regulator output. 1.8V
9 - vdd-supply : power supply for IC 3.3V
11 [0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
18 compatible = "cypress,tm2-touchkey";
20 interrupt-parent = <&gpa3>;
21 interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
22 vcc-supply=<&ldo32_reg>;
23 vdd-supply=<&ldo33_reg>;