Intel Merrifield pinctrl driver

modulename: pinctrl-merrifield.ko

configname: CONFIG_PINCTRL_MERRIFIELD

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>Intel pinctrl drivers
└─>Intel Merrifield pinctrl driver
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Merrifield Family-Level Interface Shim (FLIS) driver provides an
interface that allows configuring of SoC pins and using them as
GPIOs.

source code: