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* Rohm BU21029 Touch Screen Controller
Required properties:
- compatible : must be "rohm,bu21029"
- reg : i2c device address of the chip (0x40 or 0x41)
- interrupt-parent : the phandle for the gpio controller
- interrupts : (gpio) interrupt to which the chip is connected
- rohm,x-plate-ohms : x-plate resistance in Ohm
Optional properties:
- reset-gpios : gpio pin to reset the chip (active low)
- touchscreen-size-x : horizontal resolution of touchscreen (in pixels)
- touchscreen-size-y : vertical resolution of touchscreen (in pixels)
- touchscreen-max-pressure: maximum pressure value
- vdd-supply : power supply for the controller
Example:
&i2c1 {
/* ... */
bu21029: bu21029@40 {
compatible = "rohm,bu21029";
reg = <0x40>;
interrupt-parent = <&gpio1>;
interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
reset-gpios = <&gpio6 16 GPIO_ACTIVE_LOW>;
rohm,x-plate-ohms = <600>;
touchscreen-size-x = <800>;
touchscreen-size-y = <480>;
touchscreen-max-pressure = <4095>;
};
/* ... */
};
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