RICOH RC5T583 GPIO

modulename: gpio-rc5t583.ko

configname: CONFIG_GPIO_RC5T583

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>MFD GPIO expanders
└─>RICOH RC5T583 GPIO
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Select this option to enable GPIO driver for the Ricoh RC5T583
chip family.
This driver provides the support for driving/reading the GPIO pins
of RC5T583 device through standard GPIO library.

source code: