# 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 IDE_GD_ATA || 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" 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 CPUs are active on the system at any given moment. If unsure, say N. config LEDS_TRIGGER_ACTIVITY tristate "LED activity Trigger" help This allows LEDs to be controlled by an immediate CPU usage. The flash frequency and duty cycle varies from faint flashes to intense brightness depending on the instant CPU load. If unsure, say N. config LEDS_TRIGGER_GPIO tristate "LED GPIO Trigger" depends on GPIOLIB || COMPILE_TEST help This allows LEDs to be controlled by gpio events. It's good when using gpios as switches and triggering the needed LEDs from there. One use case is n810's keypad LEDs that could be triggered by this trigger when user slides up to show keypad. If unsure, say N. config LEDS_TRIGGER_DEFAULT_ON tristate "LED Default ON Trigger" help This allows LEDs to be initialised in the ON state. If unsure, say Y. comment "iptables trigger is under Netfilter config (LED target)" depends on LEDS_TRIGGERS config LEDS_TRIGGER_TRANSIENT tristate "LED Transient Trigger" help This allows one time activation of a transient state on GPIO/PWM based hardware. If unsure, say Y. config LEDS_TRIGGER_CAMERA tristate "LED Camera Flash/Torch Trigger" help This allows LEDs to be controlled as a camera flash/torch device. This enables direct flash/torch on/off by the driver, kernel space. If unsure, say Y. config LEDS_TRIGGER_PANIC bool "LED Panic Trigger" help This allows LEDs to be configured to blink on a kernel panic. Enabling this option will allow to mark certain LEDs as panic indicators, allowing to blink them on a kernel panic, even if they are set to a different trigger. If unsure, say Y. config LEDS_TRIGGER_NETDEV tristate "LED Netdev Trigger" depends on NET help This allows LEDs to be controlled by network device activity. If unsure, say Y. config LEDS_TRIGGER_PATTERN tristate "LED Pattern Trigger" help This allows LEDs to be controlled by a software or hardware pattern which is a series of tuples, of brightness and duration (ms). If unsure, say N config LEDS_TRIGGER_AUDIO tristate "Audio Mute LED Trigger" help This allows LEDs to be controlled by audio drivers for following the audio mute and mic-mute changes. If unsure, say N endif # LEDS_TRIGGERS