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d2ff98b792
Allow configuring an optional dedicated wakeirq for gpio-keys that some SoCs have. Let's use the common interrupt naming "irq" and "wakeup" that we already have in use for some drivers and subsystems like i2c framework. Note that the gpio-keys interrupt property is optional. If only a gpio property is specified, the driver tries to translate the gpio into an interrupt. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20231129110618.27551-1-tony@atomide.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
181 lines
4.5 KiB
YAML
181 lines
4.5 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/gpio-keys.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: GPIO attached keys
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maintainers:
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- Rob Herring <robh@kernel.org>
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properties:
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compatible:
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enum:
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- gpio-keys
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- gpio-keys-polled
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autorepeat: true
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label:
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description: Name of entire device
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poll-interval: true
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patternProperties:
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"^(button|event|key|switch|(button|event|key|switch)-[a-z0-9-]+|[a-z0-9-]+-(button|event|key|switch))$":
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$ref: input.yaml#
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properties:
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gpios:
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maxItems: 1
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interrupts:
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oneOf:
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- items:
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- description: Optional key interrupt or wakeup interrupt
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- items:
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- description: Key interrupt
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- description: Wakeup interrupt
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interrupt-names:
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description:
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Optional interrupt names, can be used to specify a separate dedicated
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wake-up interrupt in addition to the gpio irq
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oneOf:
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- items:
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- enum: [ irq, wakeup ]
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- items:
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- const: irq
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- const: wakeup
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label:
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description: Descriptive name of the key.
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linux,code:
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description: Key / Axis code to emit.
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linux,input-type:
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default: 1 # EV_KEY
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linux,input-value:
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description: |
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If linux,input-type is EV_ABS or EV_REL then this
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value is sent for events this button generates when pressed.
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EV_ABS/EV_REL axis will generate an event with a value of 0
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when all buttons with linux,input-type == type and
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linux,code == axis are released. This value is interpreted
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as a signed 32 bit value, e.g. to make a button generate a
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value of -1 use:
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linux,input-value = <0xffffffff>; /* -1 */
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$ref: /schemas/types.yaml#/definitions/uint32
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debounce-interval:
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description:
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Debouncing interval time in milliseconds. If not specified defaults to 5.
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 5
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wakeup-source:
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description: Button can wake-up the system.
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wakeup-event-action:
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description: |
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Specifies whether the key should wake the system when asserted, when
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deasserted, or both. This property is only valid for keys that wake up the
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system (e.g., when the "wakeup-source" property is also provided).
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Supported values are defined in linux-event-codes.h:
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EV_ACT_ANY - both asserted and deasserted
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EV_ACT_ASSERTED - asserted
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EV_ACT_DEASSERTED - deasserted
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1, 2]
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linux,can-disable:
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description:
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Indicates that button is connected to dedicated (not shared) interrupt
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which can be disabled to suppress events from the button.
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type: boolean
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required:
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- linux,code
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anyOf:
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- required:
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- interrupts
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- required:
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- interrupts-extended
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- required:
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- gpios
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allOf:
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- if:
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properties:
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interrupts:
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minItems: 2
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required:
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- interrupts
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then:
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properties:
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interrupt-names:
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minItems: 2
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required:
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- interrupt-names
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dependencies:
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wakeup-event-action: [ wakeup-source ]
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linux,input-value: [ gpios ]
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unevaluatedProperties: false
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allOf:
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- $ref: input.yaml#
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- if:
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properties:
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compatible:
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const: gpio-keys-polled
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then:
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required:
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- poll-interval
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else:
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properties:
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poll-interval: false
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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gpio-keys {
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compatible = "gpio-keys";
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autorepeat;
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key-up {
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label = "GPIO Key UP";
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linux,code = <103>;
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gpios = <&gpio1 0 1>;
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};
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key-down {
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label = "GPIO Key DOWN";
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linux,code = <108>;
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interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
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};
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key-wakeup {
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label = "GPIO Key WAKEUP";
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linux,code = <143>;
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interrupts-extended = <&intc 2 IRQ_TYPE_EDGE_FALLING>,
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<&intc_wakeup 0 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "irq", "wakeup";
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wakeup-source;
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};
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};
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...
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