| * 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>; | |
| }; | |
| /* ... */ | |
| }; |