CONFIG_GPIO_SAMSUNG (not configurable)

modulename: gpio-samsung.ko

configname: CONFIG_GPIO_SAMSUNG

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>GPIO_SAMSUNG
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Legacy GPIO support. Use only for platforms without support for
pinctrl.

source code: