CMPC Laptop Extras

modulename: classmate-laptop.ko

configname: CONFIG_ACPI_CMPC

Linux Kernel Configuration
└─>Device Drivers
└─>X86 Platform Specific Device Drivers
└─>CMPC Laptop Extras
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
Support for Intel Classmate PC ACPI devices, including some
keys as input device, backlight device, tablet and accelerometer
devices.

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