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 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.