LXR linux/Documentation/devicetree/bindings/input/elan

   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