LED support for RT4505 flashlight controller

modulename: leds-rt4505.ko

configname: CONFIG_LEDS_RT4505

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>Device Tree and Open Firmware support
└─>LED support for RT4505 flashlight controller
In linux kernel since version 5.2 (release Date: 2019-07-07)  
This option enables support for the RT4505 flash LED controller.
RT4505 includes torch and flash functions with programmable current.
And it's commonly used to compensate the illuminance for the camera
inside the mobile product like as phones or tablets.

source code: