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Documentation / devicetree / bindings / gpio / gpio_keys.txt




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Based on kernel version 3.13. Page generated on 2014-01-20 22:00 EST.

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