1Device-Tree bindings for input/gpio_keys_polled.c keyboard driver
2
3Required properties:
4	- compatible = "gpio-keys-polled";
5	- poll-interval: Poll interval time in milliseconds
6
7Optional properties:
8	- autorepeat: Boolean, Enable auto repeat feature of Linux input
9	  subsystem.
10
11Each button (key) is represented as a sub-node of "gpio-keys-polled":
12Subnode properties:
13
14	- gpios: OF device-tree gpio specification.
15	- label: Descriptive name of the key.
16	- linux,code: Keycode to emit.
17
18Optional subnode-properties:
19	- linux,input-type: Specify event type this button/key generates.
20	  If not specified defaults to <1> == EV_KEY.
21	- debounce-interval: Debouncing interval time in milliseconds.
22	  If not specified defaults to 5.
23	- gpio-key,wakeup: Boolean, button can wake-up the system.
24
25Example nodes:
26
27	gpio_keys_polled {
28			compatible = "gpio-keys-polled";
29			#address-cells = <1>;
30			#size-cells = <0>;
31			poll-interval = <100>;
32			autorepeat;
33			button@21 {
34				label = "GPIO Key UP";
35				linux,code = <103>;
36				gpios = <&gpio1 0 1>;
37			};
38			...
39