1 Device-Tree bindings for input/gpio_keys_polled.c keyboard driver
4 - compatible = "gpio-keys-polled";
5 - poll-interval: Poll interval time in milliseconds
8 - autorepeat: Boolean, Enable auto repeat feature of Linux input
11 Each button (key) is represented as a sub-node of "gpio-keys-polled":
14 - gpios: OF device-tree gpio specification.
15 - label: Descriptive name of the key.
16 - linux,code: Key / Axis code to emit.
18 Optional subnode-properties:
19 - linux,input-type: Specify event type this button/key generates.
20 If not specified defaults to <1> == EV_KEY.
21 - linux,input-value: If linux,input-type is EV_ABS or EV_REL then this
22 value is sent for events this button generates when pressed.
23 EV_ABS/EV_REL axis will generate an event with a value of 0 when
24 all buttons with linux,input-type == type and linux,code == axis
25 are released. This value is interpreted as a signed 32 bit value,
26 e.g. to make a button generate a value of -1 use:
27 linux,input-value = <0xffffffff>; /* -1 */
28 - debounce-interval: Debouncing interval time in milliseconds.
29 If not specified defaults to 5.
30 - wakeup-source: Boolean, button can wake-up the system.
31 (Legacy property supported: "gpio-key,wakeup")
36 compatible = "gpio-keys-polled";
39 poll-interval = <100>;
42 label = "GPIO Key UP";