Broadcom Cygnus IOMUX driver

modulename: pinctrl-cygnus-mux.ko

configname: CONFIG_PINCTRL_CYGNUS_MUX

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>Broadcom Cygnus IOMUX driver
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Say yes here to enable the Broadcom Cygnus IOMUX driver.

The Broadcom Cygnus IOMUX driver supports group based IOMUX
configuration, with the exception that certain individual pins
can be overrided to GPIO function

source code: