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