Richtek RT4831 Backlight Driver

modulename: rt4831-backlight.ko

configname: CONFIG_BACKLIGHT_RT4831

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Backlight & LCD device support
└─>Richtek RT4831 Backlight Driver
In linux kernel since version 5.2 (release Date: 2019-07-07)  
This enables support for Richtek RT4831 Backlight driver.
It's commonly used to drive the display WLED. There're four channels
inisde, and each channel can provide up to 30mA current.

source code: