CONFIG_GPIO_EP93XX (not configurable)

modulename: gpio-ep93xx.ko

configname: CONFIG_GPIO_EP93XX

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>GPIO_EP93XX
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/gpio/gpio-ep93xx.c