Altera GPIO

modulename: gpio-altera.ko

configname: CONFIG_GPIO_ALTERA

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>Altera GPIO
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say Y or M here to build support for the Altera PIO device.

If driver is built as a module it will be called gpio-altera.

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