RDC R-321x GPIO support

modulename: gpio-rdc321x.ko

and/or

rdc321x-gpio.ko

configname: CONFIG_GPIO_RDC321X

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>RDC R-321x GPIO support
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
Support for the RDC R321x SoC GPIOs over southbridge
PCI configuration space.

source code:
drivers/gpio/rdc321x-gpio.c