Broadcom Cygnus GPIO (with PINCONF) driver

modulename: pinctrl-cygnus-gpio.ko

configname: CONFIG_PINCTRL_CYGNUS_GPIO

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

The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
the always-ON GPIO controller (CRMU/AON). All 3 GPIO controllers are
supported by this driver.

All 3 Cygnus GPIO controllers support basic PINCONF functions such
as bias pull up, pull down, and drive strength configurations, when
these pins are muxed to GPIO.

Pins from the ASIU GPIO can be individually muxed to GPIO function,
through interaction with the Cygnus IOMUX controller.

source code: