Support pin multiplexing controllers

modulename: pinmux.ko

configname: CONFIG_PINMUX

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>Support pin multiplexing controllers
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/pinctrl/pinmux.c
depends
CONFIG_PINCTRL