Intel Low Power Subsystem Support

modulename: clk-x86-lpss.ko

configname: CONFIG_X86_INTEL_LPSS

Linux Kernel Configuration
└─>Processor type and features
└─>Intel Low Power Subsystem Support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Select to build support for Intel Low Power Subsystem such as
found on Intel Lynxpoint PCH. Selecting this option enables
things like clock tree (common clock framework) which are needed
by the LPSS peripheral drivers.

source code:
drivers/clk/x86/

depends
CONFIG_ACPI