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_DISK
37 bool "LED Disk Trigger"
38 depends on IDE_GD_ATA || ATA
39 depends on LEDS_TRIGGERS
41 This allows LEDs to be controlled by disk activity.
44 config LEDS_TRIGGER_MTD
45 bool "LED MTD (NAND/NOR) Trigger"
47 depends on LEDS_TRIGGERS
49 This allows LEDs to be controlled by MTD activity.
52 config LEDS_TRIGGER_HEARTBEAT
53 tristate "LED Heartbeat Trigger"
54 depends on LEDS_TRIGGERS
56 This allows LEDs to be controlled by a CPU load average.
57 The flash frequency is a hyperbolic function of the 1-minute
61 config LEDS_TRIGGER_BACKLIGHT
62 tristate "LED backlight Trigger"
63 depends on LEDS_TRIGGERS
65 This allows LEDs to be controlled as a backlight device: they
66 turn off and on when the display is blanked and unblanked.
70 config LEDS_TRIGGER_CPU
71 bool "LED CPU Trigger"
72 depends on LEDS_TRIGGERS
74 This allows LEDs to be controlled by active CPUs. This shows
75 the active CPUs across an array of LEDs so you can see which
76 CPUs are active on the system at any given moment.
80 config LEDS_TRIGGER_ACTIVITY
81 tristate "LED activity Trigger"
82 depends on LEDS_TRIGGERS
84 This allows LEDs to be controlled by an immediate CPU usage.
85 The flash frequency and duty cycle varies from faint flashes to
86 intense brightness depending on the instant CPU load.
89 config LEDS_TRIGGER_GPIO
90 tristate "LED GPIO Trigger"
91 depends on LEDS_TRIGGERS
92 depends on GPIOLIB || COMPILE_TEST
94 This allows LEDs to be controlled by gpio events. It's good
95 when using gpios as switches and triggering the needed LEDs
96 from there. One use case is n810's keypad LEDs that could
97 be triggered by this trigger when user slides up to show
102 config LEDS_TRIGGER_DEFAULT_ON
103 tristate "LED Default ON Trigger"
104 depends on LEDS_TRIGGERS
106 This allows LEDs to be initialised in the ON state.
109 comment "iptables trigger is under Netfilter config (LED target)"
110 depends on LEDS_TRIGGERS
112 config LEDS_TRIGGER_TRANSIENT
113 tristate "LED Transient Trigger"
114 depends on LEDS_TRIGGERS
116 This allows one time activation of a transient state on
117 GPIO/PWM based hardware.
120 config LEDS_TRIGGER_CAMERA
121 tristate "LED Camera Flash/Torch Trigger"
122 depends on LEDS_TRIGGERS
124 This allows LEDs to be controlled as a camera flash/torch device.
125 This enables direct flash/torch on/off by the driver, kernel space.
128 config LEDS_TRIGGER_PANIC
129 bool "LED Panic Trigger"
130 depends on LEDS_TRIGGERS
132 This allows LEDs to be configured to blink on a kernel panic.
133 Enabling this option will allow to mark certain LEDs as panic indicators,
134 allowing to blink them on a kernel panic, even if they are set to
138 config LEDS_TRIGGER_NETDEV
139 tristate "LED Netdev Trigger"
140 depends on NET && LEDS_TRIGGERS
142 This allows LEDs to be controlled by network device activity.
145 endif # LEDS_TRIGGERS