From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- .../devicetree/bindings/input/gpio-keys.txt | 58 ++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/gpio-keys.txt (limited to 'Documentation/devicetree/bindings/input/gpio-keys.txt') diff --git a/Documentation/devicetree/bindings/input/gpio-keys.txt b/Documentation/devicetree/bindings/input/gpio-keys.txt new file mode 100644 index 000000000..7cccc49b6 --- /dev/null +++ b/Documentation/devicetree/bindings/input/gpio-keys.txt @@ -0,0 +1,58 @@ +Device-Tree bindings for input/keyboard/gpio_keys.c keyboard driver + +Required properties: + - compatible = "gpio-keys"; + +Optional properties: + - autorepeat: Boolean, Enable auto repeat feature of Linux input + subsystem. + - label: String, name of the input device. + +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. + - wakeup-source: Boolean, button can wake-up the system. + (Legacy property supported: "gpio-key,wakeup") + - wakeup-event-action: Specifies whether the key should wake the + system when asserted, when deasserted, or both. This property is + only valid for keys that wake up the system (e.g., when the + "wakeup-source" property is also provided). + Supported values are defined in linux-event-codes.h: + EV_ACT_ASSERTED - asserted + EV_ACT_DEASSERTED - deasserted + EV_ACT_ANY - both asserted and deasserted + - 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"; + autorepeat; + + up { + label = "GPIO Key UP"; + linux,code = <103>; + gpios = <&gpio1 0 1>; + }; + + down { + label = "GPIO Key DOWN"; + linux,code = <108>; + interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>; + }; + ... -- cgit v1.2.3