1 menuconfig LEDS_TRIGGERS
2 bool "LED Trigger support"
5 This option enables trigger support for the leds class.
6 These triggers allow kernel events to drive the LEDs and can
7 be configured via sysfs. If unsure, say Y.
11 config LEDS_TRIGGER_TIMER
12 tristate "LED Timer Trigger"
13 depends on LEDS_TRIGGERS
15 This allows LEDs to be controlled by a programmable timer
16 via sysfs. Some LED hardware can be programmed to start
17 blinking the LED without any further software interaction.
18 For more details read Documentation/leds/leds-class.txt.
22 config LEDS_TRIGGER_ONESHOT
23 tristate "LED One-shot Trigger"
24 depends on LEDS_TRIGGERS
26 This allows LEDs to blink in one-shot pulses with parameters
27 controlled via sysfs. It's useful to notify the user on
28 sporadic events, when there are no clear begin and end trap points,
29 or on dense events, where this blinks the LED at constant rate if
32 It also shows how to use the led_blink_set_oneshot() function.
36 config LEDS_TRIGGER_IDE_DISK
37 bool "LED IDE Disk Trigger"
39 depends on LEDS_TRIGGERS
41 This allows LEDs to be controlled by IDE disk activity.
44 config LEDS_TRIGGER_HEARTBEAT
45 tristate "LED Heartbeat Trigger"
46 depends on LEDS_TRIGGERS
48 This allows LEDs to be controlled by a CPU load average.
49 The flash frequency is a hyperbolic function of the 1-minute
53 config LEDS_TRIGGER_BACKLIGHT
54 tristate "LED backlight Trigger"
55 depends on LEDS_TRIGGERS
57 This allows LEDs to be controlled as a backlight device: they
58 turn off and on when the display is blanked and unblanked.
62 config LEDS_TRIGGER_CPU
63 bool "LED CPU Trigger"
64 depends on LEDS_TRIGGERS
66 This allows LEDs to be controlled by active CPUs. This shows
67 the active CPUs across an array of LEDs so you can see which
68 CPUs are active on the system at any given moment.
72 config LEDS_TRIGGER_GPIO
73 tristate "LED GPIO Trigger"
74 depends on LEDS_TRIGGERS
75 depends on GPIOLIB || COMPILE_TEST
77 This allows LEDs to be controlled by gpio events. It's good
78 when using gpios as switches and triggering the needed LEDs
79 from there. One use case is n810's keypad LEDs that could
80 be triggered by this trigger when user slides up to show
85 config LEDS_TRIGGER_DEFAULT_ON
86 tristate "LED Default ON Trigger"
87 depends on LEDS_TRIGGERS
89 This allows LEDs to be initialised in the ON state.
92 comment "iptables trigger is under Netfilter config (LED target)"
93 depends on LEDS_TRIGGERS
95 config LEDS_TRIGGER_TRANSIENT
96 tristate "LED Transient Trigger"
97 depends on LEDS_TRIGGERS
99 This allows one time activation of a transient state on
100 GPIO/PWM based hardware.
103 config LEDS_TRIGGER_CAMERA
104 tristate "LED Camera Flash/Torch Trigger"
105 depends on LEDS_TRIGGERS
107 This allows LEDs to be controlled as a camera flash/torch device.
108 This enables direct flash/torch on/off by the driver, kernel space.
111 endif # LEDS_TRIGGERS