Generic memory-mapped GPIO controller support (MMIO platform device)

configname: CONFIG_GPIO_GENERIC_PLATFORM

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Generic memory-mapped GPIO controller support (MMIO platform device)
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say yes here to support basic platform_device memory-mapped GPIO controllers.