ADP5588 I2C GPIO expander

modulename: gpio-adp5588.ko

and/or

adp5588-gpio.ko

configname: CONFIG_GPIO_ADP5588

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>I2C support
└─>ADP5588 I2C GPIO expander
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
This option enables support for 18 GPIOs found
on Analog Devices ADP5588 GPIO Expanders.
To compile this driver as a module, choose M here: the module will be
called adp5588-gpio.

source code: