CONFIG_GPIO_MXS (not configurable)

modulename: gpio-mxs.ko

configname: CONFIG_GPIO_MXS

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