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-Device-Tree bindings for input/gpio_keys_polled.c keyboard driver
-
-Required properties:
- - compatible = "gpio-keys-polled";
- - poll-interval: Poll interval time in milliseconds
-
-Optional properties:
- - autorepeat: Boolean, Enable auto repeat feature of Linux input
- subsystem.
-
-Each button (key) is represented as a sub-node of "gpio-keys-polled":
-Subnode properties:
-
- - gpios: OF device-tree gpio specification.
- - label: Descriptive name of the key.
- - linux,code: Key / Axis code to emit.
-
-Optional subnode-properties:
- - linux,input-type: Specify event type this button/key generates.
- If not specified defaults to <1> == EV_KEY.
- - linux,input-value: If linux,input-type is EV_ABS or EV_REL then this
- value is sent for events this button generates when pressed.
- EV_ABS/EV_REL axis will generate an event with a value of 0 when
- all buttons with linux,input-type == type and linux,code == axis
- are released. This value is interpreted as a signed 32 bit value,
- e.g. to make a button generate a value of -1 use:
- linux,input-value = <0xffffffff>; /* -1 */
- - 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")
-
-Example nodes:
-
- gpio_keys_polled {
- compatible = "gpio-keys-polled";
- poll-interval = <100>;
- autorepeat;
-
- button21 {
- label = "GPIO Key UP";
- linux,code = <103>;
- gpios = <&gpio1 0 1>;
- };
- ...