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Diffstat (limited to 'Documentation/devicetree/bindings/input/touchscreen/bu21029.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/bu21029.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/bu21029.txt b/Documentation/devicetree/bindings/input/touchscreen/bu21029.txt new file mode 100644 index 000000000..8daa0e868 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/bu21029.txt @@ -0,0 +1,35 @@ +* 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>; + }; + + /* ... */ + }; |