TC3589X GPIOs

modulename: gpio-tc3589x.ko

and/or

tc3589x-gpio.ko

configname: CONFIG_GPIO_TC3589X

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>TC3589X GPIOs
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
This enables support for the GPIOs found on the TC3589X
I/O Expander.

source code:
drivers/gpio/tc3589x-gpio.c