Kontron ETX / COMexpress GPIO

modulename: gpio-kempld.ko

configname: CONFIG_GPIO_KEMPLD

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>MFD GPIO expanders
└─>Kontron ETX / COMexpress GPIO
In linux kernel since version 3.12 (release Date: 2013-11-03)  
This enables support for the PLD GPIO interface on some Kontron ETX
and COMexpress (ETXexpress) modules.

This driver can also be built as a module. If so, the module will be
called gpio-kempld.

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