Broadcom NSP IOMUX driver

modulename: pinctrl-nsp-mux.ko

configname: CONFIG_PINCTRL_NSP_MUX

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

The Broadcom Northstar Plus IOMUX driver supports pin based IOMUX
configuration, with certain individual pins can be overridden
to GPIO function.

source code: