Pinctrl driver for Microsemi/Microchip Serial GPIO

modulename: pinctrl-microchip-sgpio.ko

configname: CONFIG_PINCTRL_MICROCHIP_SGPIO

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>Device Tree and Open Firmware support
└─>Pinctrl driver for Microsemi/Microchip Serial GPIO
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Support for the serial GPIO interface used on Microsemi and
Microchip SoC's. By using a serial interface, the SIO
controller significantly extends the number of available
GPIOs with a minimum number of additional pins on the
device. The primary purpose of the SIO controller is to
connect control signals from SFP modules and to act as an
LED controller.

source code: