mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
c4dc5f8c95
Allow specifying name if input device via device tree property. This helps userspace code to get name and perform proper event to key mapping in some cases (for example, on Android). Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
51 lines
1.5 KiB
Plaintext
51 lines
1.5 KiB
Plaintext
Device-Tree bindings for input/gpio_keys.c keyboard driver
|
|
|
|
Required properties:
|
|
- compatible = "gpio-keys";
|
|
|
|
Optional properties:
|
|
- autorepeat: Boolean, Enable auto repeat feature of Linux input
|
|
subsystem.
|
|
- label: String, name of the input device.
|
|
|
|
Each button (key) is represented as a sub-node of "gpio-keys":
|
|
Subnode properties:
|
|
|
|
- gpios: OF device-tree gpio specification.
|
|
- interrupts: the interrupt line for that input.
|
|
- label: Descriptive name of the key.
|
|
- linux,code: Keycode to emit.
|
|
|
|
Note that either "interrupts" or "gpios" properties can be omitted, but not
|
|
both at the same time. Specifying both properties is allowed.
|
|
|
|
Optional subnode-properties:
|
|
- linux,input-type: Specify event type this button/key generates.
|
|
If not specified defaults to <1> == EV_KEY.
|
|
- debounce-interval: Debouncing interval time in milliseconds.
|
|
If not specified defaults to 5.
|
|
- wakeup-source: Boolean, button can wake-up the system.
|
|
(Legacy property supported: "gpio-key,wakeup")
|
|
- linux,can-disable: Boolean, indicates that button is connected
|
|
to dedicated (not shared) interrupt which can be disabled to
|
|
suppress events from the button.
|
|
|
|
Example nodes:
|
|
|
|
gpio_keys {
|
|
compatible = "gpio-keys";
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
autorepeat;
|
|
button@21 {
|
|
label = "GPIO Key UP";
|
|
linux,code = <103>;
|
|
gpios = <&gpio1 0 1>;
|
|
};
|
|
button@22 {
|
|
label = "GPIO Key DOWN";
|
|
linux,code = <108>;
|
|
interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
|
|
};
|
|
...
|