IMX50 pinctrl driver

modulename: pinctrl-imx50.ko

configname: CONFIG_PINCTRL_IMX50

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>IMX50 pinctrl driver
In linux kernel since version 3.13 (release Date: 2014-01-19)  
Say Y here to enable the imx50 pinctrl driver

source code: