drivers/leds/trigger/Kconfig

Source file repositories/reference/linux-study-clean/drivers/leds/trigger/Kconfig

File Facts

System
Linux kernel
Corpus path
drivers/leds/trigger/Kconfig
Extension
[no extension]
Size
5019 bytes
Lines
165
Domain
Driver Families
Bucket
drivers/leds
Inferred role
Driver Families: build/configuration rule
Status
atlas-only

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0-only
menuconfig LEDS_TRIGGERS
	bool "LED Trigger support"
	depends on LEDS_CLASS
	help
	  This option enables trigger support for the leds class.
	  These triggers allow kernel events to drive the LEDs and can
	  be configured via sysfs. If unsure, say Y.

if LEDS_TRIGGERS

config LEDS_TRIGGER_TIMER
	tristate "LED Timer Trigger"
	help
	  This allows LEDs to be controlled by a programmable timer
	  via sysfs. Some LED hardware can be programmed to start
	  blinking the LED without any further software interaction.
	  For more details read Documentation/leds/leds-class.rst.

	  If unsure, say Y.

config LEDS_TRIGGER_ONESHOT
	tristate "LED One-shot Trigger"
	help
	  This allows LEDs to blink in one-shot pulses with parameters
	  controlled via sysfs.  It's useful to notify the user on
	  sporadic events, when there are no clear begin and end trap points,
	  or on dense events, where this blinks the LED at constant rate if
	  rearmed continuously.

	  It also shows how to use the led_blink_set_oneshot() function.

	  If unsure, say Y.

config LEDS_TRIGGER_DISK
	bool "LED Disk Trigger"
	depends on ATA
	help
	  This allows LEDs to be controlled by disk activity.
	  If unsure, say Y.

config LEDS_TRIGGER_MTD
	bool "LED MTD (NAND/NOR) Trigger"
	depends on MTD
	help
	  This allows LEDs to be controlled by MTD activity.
	  If unsure, say N.

config LEDS_TRIGGER_HEARTBEAT
	tristate "LED Heartbeat Trigger"
	help
	  This allows LEDs to be controlled by a CPU load average.
	  The flash frequency is a hyperbolic function of the 1-minute
	  load average.
	  If unsure, say Y.

config LEDS_TRIGGER_BACKLIGHT
	tristate "LED backlight Trigger"
	help
	  This allows LEDs to be controlled as a backlight device: they
	  turn off and on when the display is blanked and unblanked.

	  If unsure, say N.

config LEDS_TRIGGER_CPU
	bool "LED CPU Trigger"
	depends on !PREEMPT_RT
	help
	  This allows LEDs to be controlled by active CPUs. This shows
	  the active CPUs across an array of LEDs so you can see which

Annotation

Implementation Notes