Synopsys DesignWare APB GPIO driver

modulename: gpio-dwapb.ko

configname: CONFIG_GPIO_DWAPB

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>Synopsys DesignWare APB GPIO driver
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say Y or M here to build support for the Synopsys DesignWare APB
GPIO block.

source code:
drivers/gpio/gpio-dwapb.c