System Controller Register R/W Based on Regmap

modulename: syscon.ko

configname: CONFIG_MFD_SYSCON

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>System Controller Register R/W Based on Regmap
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Select this option to enable accessing system control registers
via regmap.

source code:
drivers/mfd//syscon.c