gpio-keys
Vendor: Generic or vendor-independent
Description
Zephyr Input GPIO KEYS parent node
This defines a group of buttons that can generate input events. Each button
is defined in a child node of the gpio-keys node and defines a specific key
code.
For example:
#include <zephyr/dt-bindings/input/input-event-codes.h>
/ {
buttons {
compatible = "gpio-keys";
button_0 {
gpios = <&gpio0 13 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
zephyr,code = <INPUT_KEY_0>;
};
};
};
Properties
Top level properties
These property descriptions apply to “gpio-keys” nodes themselves. This page also describes child node properties in the following sections.
Properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
|
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Debouncing interval time in milliseconds.
If not specified defaults to 30.
Default value: |
|
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Do not use interrupts for the key GPIOs, poll the pin periodically at the
specified debounce-interval-ms instead.
|
Deprecated properties not inherited from the base binding file.
(None)
Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “gpio-keys” compatible.
Name |
Type |
Details |
|---|---|---|
|
|
Property to identify that a device can be used as wake up source.
When this property is provided a specific flag is set into the
device that tells the system that the device is capable of
wake up the system.
Wake up capable devices are disabled (interruptions will not wake up
the system) by default but they can be enabled at runtime if necessary.
|
|
|
Power domain the device belongs to.
The device will be notified when the power domain it belongs to is either
suspended or resumed.
|
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|
Automatically configure the device for runtime power management after the
init function runs.
|
|
|
List of power states that will disable this device power.
|
|
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indicates the operational status of a device
Legal values: See Important properties for more information. |
|
|
compatible strings
This property is required. See Important properties for more information. |
|
|
register space
See Important properties for more information. |
|
|
name of each register space
|
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interrupts for device
See Important properties for more information. |
|
|
extended interrupt specifier for device
|
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|
name of each interrupt
|
|
|
phandle to interrupt controller node
|
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Human readable string describing the device (used as device_get_binding() argument)
See Important properties for more information. This property is deprecated. |
|
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Clock gate information
|
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|
name of each clock
|
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|
number of address cells in reg property
|
|
|
number of size cells in reg property
|
|
|
DMA channels specifiers
|
|
|
Provided names of DMA channel specifiers
|
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IO channels specifiers
|
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|
Provided names of IO channel specifiers
|
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mailbox / IPM channels specifiers
|
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|
Provided names of mailbox / IPM channel specifiers
|
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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
|
Child node properties
Name |
Type |
Details |
|---|---|---|
|
|
This property is required. |
|
|
Descriptive name of the key
See Important properties for more information. |
|
|
Key code to emit.
|