Intel MSIC

modulename: intel_msic.ko

configname: CONFIG_MFD_INTEL_MSIC

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>Intel MSIC
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Select this option to enable access to Intel MSIC (Avatele
Passage) chip. This chip embeds audio, battery, GPIO, etc.
devices used in Intel Medfield platforms.

source code: