1* Rohm BU21029 Touch Screen Controller
2
3Required 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
10Optional 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
17Example:
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	};
36