CONFIG_GPIO_MXC (not configurable)

modulename: gpio-mxc.ko

configname: CONFIG_GPIO_MXC

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