arch/arm/boot/dts/overlays/ilitek251x-overlay.dts

   1 // Device tree overlay for I2C connected Ilitek multiple touch controller
   2 /dts-v1/;
   3 /plugin/;
   4
   5  / {
   6         compatible = "brcm,bcm2835";
   7
   8         fragment@0 {
   9                 target = <&gpio>;
  10                 __overlay__ {
  11                         ili251x_pins: ili251x_pins {
  12                                 brcm,pins = <4>; // interrupt
  13                                 brcm,function = <0>; // in
  14                                 brcm,pull = <2>; // pull-up //
  15                         };
  16                 };
  17         };
  18
  19         fragment@1 {
  20                 target = <&i2c1>;
  21                 __overlay__ {
  22                         #address-cells = <1>;
  23                         #size-cells = <0>;
  24                         status = "okay";
  25
  26                         ili251x: ili251x@41 {
  27                                 compatible = "ilitek,ili251x";
  28                                 reg = <0x41>;
  29                                 pinctrl-names = "default";
  30                                 pinctrl-0 = <&ili251x_pins>;
  31                                 interrupt-parent = <&gpio>;
  32                                 interrupts = <4 8>; // high-to-low edge triggered
  33                                 touchscreen-size-x = <16384>;
  34                                 touchscreen-size-y = <9600>;
  35                         };
  36                 };
  37         };
  38
  39         __overrides__ {
  40                 interrupt = <&ili251x_pins>,"brcm,pins:0",
  41                         <&ili251x>,"interrupts:0";
  42                 sizex = <&ili251x>,"touchscreen-size-x:0";
  43                 sizey = <&ili251x>,"touchscreen-size-y:0";
  44         };
  45 };