GPIO support for PMIC MAX77620 and MAX20024

modulename: gpio-max77620.ko

configname: CONFIG_GPIO_MAX77620

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>MFD GPIO expanders
└─>GPIO support for PMIC MAX77620 and MAX20024
In linux kernel since version 4.1 (release Date: 2015-06-21)  
GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
MAX77620 PMIC has 8 pins that can be configured as GPIOs. The
driver also provides interrupt support for each of the GPIOs.
Say yes here to enable the max77620 to be used as GPIO controller.

source code:
drivers/gpio/gpio-max77620.c