1Device-Tree bindings for input/gpio_keys.c keyboard driver
2
3Required properties:
4	- compatible = "gpio-keys";
5
6Optional properties:
7	- autorepeat: Boolean, Enable auto repeat feature of Linux input
8	  subsystem.
9
10Each button (key) is represented as a sub-node of "gpio-keys":
11Subnode properties:
12
13	- gpios: OF device-tree gpio specification.
14	- interrupts: the interrupt line for that input.
15	- label: Descriptive name of the key.
16	- linux,code: Keycode to emit.
17
18Note that either "interrupts" or "gpios" properties can be omitted, but not
19both at the same time. Specifying both properties is allowed.
20
21Optional subnode-properties:
22	- linux,input-type: Specify event type this button/key generates.
23	  If not specified defaults to <1> == EV_KEY.
24	- debounce-interval: Debouncing interval time in milliseconds.
25	  If not specified defaults to 5.
26	- gpio-key,wakeup: Boolean, button can wake-up the system.
27	- linux,can-disable: Boolean, indicates that button is connected
28	  to dedicated (not shared) interrupt which can be disabled to
29	  suppress events from the button.
30
31Example nodes:
32
33	gpio_keys {
34			compatible = "gpio-keys";
35			#address-cells = <1>;
36			#size-cells = <0>;
37			autorepeat;
38			button@21 {
39				label = "GPIO Key UP";
40				linux,code = <103>;
41				gpios = <&gpio1 0 1>;
42			};
43			button@22 {
44				label = "GPIO Key DOWN";
45				linux,code = <108>;
46				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
47			};
48			...
49