linux/Documentation/devicetree/bindings/input/touchscreen/egalax-ts.txt
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   1* EETI eGalax Multiple Touch Controller
   2
   3Required properties:
   4- compatible: must be "eeti,egalax_ts"
   5- reg: i2c slave address
   6- interrupt-parent: the phandle for the interrupt controller
   7- interrupts: touch controller interrupt
   8- wakeup-gpios: the gpio pin to be used for waking up the controller
   9  as well as uased as irq pin
  10
  11Example:
  12
  13        egalax_ts@04 {
  14                compatible = "eeti,egalax_ts";
  15                reg = <0x04>;
  16                interrupt-parent = <&gpio1>;
  17                interrupts = <9 2>;
  18                wakeup-gpios = <&gpio1 9 0>;
  19        };
  20