mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 12:21:37 +00:00
a93ad65d37
The ChipOne icn8318 is an i2c capacitive touchscreen controller typically used in cheap android tablets, this commit adds a driver for it. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
47 lines
1.5 KiB
Plaintext
47 lines
1.5 KiB
Plaintext
* ChipOne icn8318 I2C touchscreen controller
|
|
|
|
Required properties:
|
|
- compatible : "chipone,icn8318"
|
|
- reg : I2C slave address of the chip (0x40)
|
|
- interrupt-parent : a phandle pointing to the interrupt controller
|
|
serving the interrupt for this chip
|
|
- interrupts : interrupt specification for the icn8318 interrupt
|
|
- wake-gpios : GPIO specification for the WAKE input
|
|
- touchscreen-size-x : horizontal resolution of touchscreen (in pixels)
|
|
- touchscreen-size-y : vertical resolution of touchscreen (in pixels)
|
|
|
|
Optional properties:
|
|
- pinctrl-names : should be "default"
|
|
- pinctrl-0: : a phandle pointing to the pin settings for the
|
|
control gpios
|
|
- touchscreen-fuzz-x : horizontal noise value of the absolute input
|
|
device (in pixels)
|
|
- touchscreen-fuzz-y : vertical noise value of the absolute input
|
|
device (in pixels)
|
|
- touchscreen-inverted-x : X axis is inverted (boolean)
|
|
- touchscreen-inverted-y : Y axis is inverted (boolean)
|
|
- touchscreen-swapped-x-y : X and Y axis are swapped (boolean)
|
|
Swapping is done after inverting the axis
|
|
|
|
Example:
|
|
|
|
i2c@00000000 {
|
|
/* ... */
|
|
|
|
chipone_icn8318@40 {
|
|
compatible = "chipone,icn8318";
|
|
reg = <0x40>;
|
|
interrupt-parent = <&pio>;
|
|
interrupts = <9 IRQ_TYPE_EDGE_FALLING>; /* EINT9 (PG9) */
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&ts_wake_pin_p66>;
|
|
wake-gpios = <&pio 1 3 GPIO_ACTIVE_HIGH>; /* PB3 */
|
|
touchscreen-size-x = <800>;
|
|
touchscreen-size-y = <480>;
|
|
touchscreen-inverted-x;
|
|
touchscreen-swapped-x-y;
|
|
};
|
|
|
|
/* ... */
|
|
};
|