Topstar Laptop Extras

modulename: topstar-laptop.ko

configname: CONFIG_TOPSTAR_LAPTOP

Linux Kernel Configuration
└─>Device Drivers
└─>X86 Platform Specific Device Drivers
└─>Topstar Laptop Extras
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
This driver adds support for hotkeys found on Topstar laptops.

If you have a Topstar laptop, say Y or M here.

source code:
drivers/platform/x86/topstar-laptop.c