diff options
Diffstat (limited to 'Documentation/devicetree/bindings/input/gpio-keys.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/input/gpio-keys.txt | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/gpio-keys.txt b/Documentation/devicetree/bindings/input/gpio-keys.txt new file mode 100644 index 000000000..44b705767 --- /dev/null +++ b/Documentation/devicetree/bindings/input/gpio-keys.txt @@ -0,0 +1,48 @@ +Device-Tree bindings for input/gpio_keys.c keyboard driver + +Required properties: + - compatible = "gpio-keys"; + +Optional properties: + - autorepeat: Boolean, Enable auto repeat feature of Linux input + subsystem. + +Each button (key) is represented as a sub-node of "gpio-keys": +Subnode properties: + + - gpios: OF device-tree gpio specification. + - interrupts: the interrupt line for that input. + - label: Descriptive name of the key. + - linux,code: Keycode to emit. + +Note that either "interrupts" or "gpios" properties can be omitted, but not +both at the same time. Specifying both properties is allowed. + +Optional subnode-properties: + - linux,input-type: Specify event type this button/key generates. + If not specified defaults to <1> == EV_KEY. + - debounce-interval: Debouncing interval time in milliseconds. + If not specified defaults to 5. + - gpio-key,wakeup: Boolean, button can wake-up the system. + - linux,can-disable: Boolean, indicates that button is connected + to dedicated (not shared) interrupt which can be disabled to + suppress events from the button. + +Example nodes: + + gpio_keys { + compatible = "gpio-keys"; + #address-cells = <1>; + #size-cells = <0>; + autorepeat; + button@21 { + label = "GPIO Key UP"; + linux,code = <103>; + gpios = <&gpio1 0 1>; + }; + button@22 { + label = "GPIO Key DOWN"; + linux,code = <108>; + interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>; + }; + ... |