IMX6UL pinctrl driver

modulename: pinctrl-imx6ul.ko

configname: CONFIG_PINCTRL_IMX6UL

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>IMX6UL pinctrl driver
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Say Y here to enable the imx6ul pinctrl driver

source code: