Documentation/devicetree/bindings/input/touchscreen/bu21029.txt

   1 * Rohm BU21029 Touch Screen Controller
   2
   3 Required properties:
   4  - compatible              : must be "rohm,bu21029"
   5  - reg                     : i2c device address of the chip (0x40 or 0x41)
   6  - interrupt-parent        : the phandle for the gpio controller
   7  - interrupts              : (gpio) interrupt to which the chip is connected
   8  - rohm,x-plate-ohms       : x-plate resistance in Ohm
   9
  10 Optional properties:
  11  - reset-gpios             : gpio pin to reset the chip (active low)
  12  - touchscreen-size-x      : horizontal resolution of touchscreen (in pixels)
  13  - touchscreen-size-y      : vertical resolution of touchscreen (in pixels)
  14  - touchscreen-max-pressure: maximum pressure value
  15  - vdd-supply              : power supply for the controller
  16
  17 Example:
  18
  19         &i2c1 {
  20                 /* ... */
  21
  22                 bu21029: bu21029@40 {
  23                         compatible = "rohm,bu21029";
  24                         reg = <0x40>;
  25                         interrupt-parent = <&gpio1>;
  26                         interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
  27                         reset-gpios = <&gpio6 16 GPIO_ACTIVE_LOW>;
  28                         rohm,x-plate-ohms = <600>;
  29                         touchscreen-size-x = <800>;
  30                         touchscreen-size-y = <480>;
  31                         touchscreen-max-pressure = <4095>;
  32                 };
  33
  34                 /* ... */
  35         };