1Samsung tm2-touchkey 2 3Required properties: 4- compatible: 5 * "cypress,tm2-touchkey" - for the touchkey found on the tm2 board 6 * "cypress,midas-touchkey" - for the touchkey found on midas boards 7 * "cypress,aries-touchkey" - for the touchkey found on aries boards 8 * "coreriver,tc360-touchkey" - for the Coreriver TouchCore 360 touchkey 9- reg: I2C address of the chip. 10- interrupts: interrupt to which the chip is connected (see interrupt 11 binding[0]). 12- vcc-supply : internal regulator output. 1.8V 13- vdd-supply : power supply for IC 3.3V 14 15Optional properties: 16- linux,keycodes: array of keycodes (max 4), default KEY_PHONE and KEY_BACK 17 18[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt 19 20Example: 21 &i2c0 { 22 /* ... */ 23 24 touchkey@20 { 25 compatible = "cypress,tm2-touchkey"; 26 reg = <0x20>; 27 interrupt-parent = <&gpa3>; 28 interrupts = <2 IRQ_TYPE_EDGE_FALLING>; 29 vcc-supply=<&ldo32_reg>; 30 vdd-supply=<&ldo33_reg>; 31 linux,keycodes = <KEY_PHONE KEY_BACK>; 32 }; 33 }; 34