tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 };