Samsung tm2-touchkey Required properties: - compatible: must be "cypress,tm2-touchkey" - reg: I2C address of the chip. - interrupt-parent: a phandle for the interrupt controller (see interrupt binding[0]). - interrupts: interrupt to which the chip is connected (see interrupt binding[0]). - vcc-supply : internal regulator output. 1.8V - vdd-supply : power supply for IC 3.3V [0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt Example: &i2c0 { /* ... */ touchkey@20 { compatible = "cypress,tm2-touchkey"; reg = <0x20>; interrupt-parent = <&gpa3>; interrupts = <2 IRQ_TYPE_EDGE_FALLING>; vcc-supply=<&ldo32_reg>; vdd-supply=<&ldo33_reg>; }; };