1Elantech I2C Touchpad 2 3Required properties: 4- compatible: must be "elan,ekth3000". 5- reg: I2C address of the chip. 6- interrupts: interrupt to which the chip is connected (see interrupt 7 binding[0]). 8 9Optional properties: 10- wakeup-source: touchpad can be used as a wakeup source. 11- pinctrl-names: should be "default" (see pinctrl binding [1]). 12- pinctrl-0: a phandle pointing to the pin settings for the device (see 13 pinctrl binding [1]). 14- vcc-supply: a phandle for the regulator supplying 3.3V power. 15- elan,trackpoint: touchpad can support a trackpoint (boolean) 16- elan,clickpad: touchpad is a clickpad (the entire surface is a button) 17- elan,middle-button: touchpad has a physical middle button 18- elan,x_traces: number of antennas on the x axis 19- elan,y_traces: number of antennas on the y axis 20- some generic touchscreen properties [2]: 21 * touchscreen-size-x 22 * touchscreen-size-y 23 * touchscreen-x-mm 24 * touchscreen-y-mm 25 26 27[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt 28[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt 29[2]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt 30 31Example: 32 &i2c1 { 33 /* ... */ 34 35 touchpad@15 { 36 compatible = "elan,ekth3000"; 37 reg = <0x15>; 38 interrupt-parent = <&gpio4>; 39 interrupts = <0x0 IRQ_TYPE_EDGE_FALLING>; 40 wakeup-source; 41 }; 42 43 /* ... */ 44 }; 45