Qualcomm PM8941 WLED Driver

modulename: pm8941-wled.ko

configname: CONFIG_BACKLIGHT_PM8941_WLED

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Backlight & LCD device support
└─>Qualcomm PM8941 WLED Driver
In linux kernel since version 3.10 (release Date: 2013-06-30)  
If you have the Qualcomm PM8941, say Y to enable a driver for the
WLED block.

source code: