Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt

   1 * Toradex Colibri VF50 Touchscreen driver
   2
   3 Required Properties:
   4 - compatible must be toradex,vf50-touchscreen
   5 - io-channels: adc channels being used by the Colibri VF50 module
   6 - xp-gpios: FET gate driver for input of X+
   7 - xm-gpios: FET gate driver for input of X-
   8 - yp-gpios: FET gate driver for input of Y+
   9 - ym-gpios: FET gate driver for input of Y-
  10 - interrupt-parent: phandle for the interrupt controller
  11 - interrupts: pen irq interrupt for touch detection
  12 - pinctrl-names: "idle", "default", "gpios"
  13 - pinctrl-0: pinctrl node for pen/touch detection state pinmux
  14 - pinctrl-1: pinctrl node for X/Y and pressure measurement (ADC) state pinmux
  15 - pinctrl-2: pinctrl node for gpios functioning as FET gate drivers
  16 - vf50-ts-min-pressure: pressure level at which to stop measuring X/Y values
  17
  18 Example:
  19
  20         touchctrl: vf50_touchctrl {
  21                 compatible = "toradex,vf50-touchscreen";
  22                 io-channels = <&adc1 0>,<&adc0 0>,
  23                                 <&adc0 1>,<&adc1 2>;
  24                 xp-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
  25                 xm-gpios = <&gpio2 29 GPIO_ACTIVE_HIGH>;
  26                 yp-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
  27                 ym-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
  28                 interrupt-parent = <&gpio0>;
  29                 interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
  30                 pinctrl-names = "idle","default","gpios";
  31                 pinctrl-0 = <&pinctrl_touchctrl_idle>;
  32                 pinctrl-1 = <&pinctrl_touchctrl_default>;
  33                 pinctrl-2 = <&pinctrl_touchctrl_gpios>;
  34                 vf50-ts-min-pressure = <200>;
  35                 status = "disabled";
  36         };