LED Transient Trigger

modulename: ledtrig-transient.ko

configname: CONFIG_LEDS_TRIGGER_TRANSIENT

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>LED Trigger support
└─>LED Transient Trigger
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This allows one time activation of a transient state on
GPIO/PWM based hardware.
If unsure, say Y.

source code:
drivers/leds/trigger/ledtrig-transient.c