+++ /dev/null
-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>;
- };
- ...
+++ /dev/null
-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>;
- };
- ...
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/gpio-keys.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Device-Tree bindings for GPIO attached keys
+
+maintainers:
+ - Rob Herring <robh@kernel.org>
+
+properties:
+ compatible:
+ enum:
+ - gpio-keys
+ - gpio-keys-polled
+
+patternProperties:
+ ".*":
+ if:
+ type: object
+ then:
+ allOf:
+ - $ref: input.yaml#
+
+ properties:
+ gpios:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ label:
+ description: Descriptive name of the key.
+
+ linux,code:
+ description: Key / Axis code to emit.
+ $ref: /schemas/types.yaml#definitions/uint32
+
+ linux,input-type:
+ description:
+ Specify event type this button/key generates. If not specified defaults to
+ <1> == EV_KEY.
+ allOf:
+ - $ref: /schemas/types.yaml#definitions/uint32
+ default: 1
+
+ linux,input-value:
+ description: |
+ 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 */
+
+ allOf:
+ - $ref: /schemas/types.yaml#definitions/uint32
+
+ debounce-interval:
+ description:
+ Debouncing interval time in milliseconds. If not specified defaults to 5.
+ allOf:
+ - $ref: /schemas/types.yaml#definitions/uint32
+ default: 5
+
+ wakeup-source:
+ description: Button can wake-up the system.
+
+ wakeup-event-action:
+ description: |
+ 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_ANY - both asserted and deasserted
+ EV_ACT_ASSERTED - asserted
+ EV_ACT_DEASSERTED - deasserted
+ allOf:
+ - $ref: /schemas/types.yaml#definitions/uint32
+ enum: [ 0, 1, 2 ]
+
+ linux,can-disable:
+ description:
+ Indicates that button is connected to dedicated (not shared) interrupt
+ which can be disabled to suppress events from the button.
+ type: boolean
+
+ pinctrl-0:
+ maxItems: 1
+
+ pinctrl-names:
+ maxItems: 1
+
+ required:
+ - linux,code
+
+ anyOf:
+ - required:
+ - interrupts
+ - required:
+ - gpios
+
+ dependencies:
+ wakeup-event-action: [ wakeup-source ]
+ linux,input-value: [ gpios ]
+
+ unevaluatedProperties: false
+
+if:
+ properties:
+ compatible:
+ const: gpio-keys-polled
+then:
+ properties:
+ poll-interval:
+ description:
+ Poll interval time in milliseconds
+ $ref: /schemas/types.yaml#definitions/uint32
+
+ required:
+ - poll-interval
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ 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>;
+ };
+ };
+
+...
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