Xtensa GPIO32 support

modulename: gpio-xtensa.ko

configname: CONFIG_GPIO_XTENSA

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>Xtensa GPIO32 support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
and EXPSTATE (output) ports.

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