Userspace firmware loading support

modulename: firmware_class.ko

configname: CONFIG_FW_LOADER

Linux Kernel Configuration
└─>Device Drivers
└─>Generic Driver Options
└─>Userspace firmware loading support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option is provided for the case where none of the in-tree modules
require userspace firmware loading support, but a module built
out-of-tree does.

source code:
drivers/base//firmware_class.c