LED GPIO Trigger

modulename: ledtrig-gpio.ko

configname: CONFIG_LEDS_TRIGGER_GPIO

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>LED Trigger support
└─>GPIO Support
└─>LED GPIO Trigger
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
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.

source code:
depends
CONFIG_LEDS_TRIGGERS
CONFIG_NEW_LEDS
CONFIG_COMPILE_TEST or CONFIG_GPIOLIB