Generic PWM based Backlight Driver

modulename: pwm_bl.ko

configname: CONFIG_BACKLIGHT_PWM

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Generic PWM based Backlight Driver
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
If you have a LCD backlight adjustable by PWM, say Y to enable
this driver.

source code: