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