NVIDIA Tegra186 GPIO support

modulename: gpio-tegra186.ko

configname: CONFIG_GPIO_TEGRA186

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>NVIDIA Tegra186 GPIO support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say yes here to support GPIO pins on NVIDIA Tegra186 SoCs.

source code:
drivers/gpio/gpio-tegra186.c
selects
CONFIG_GPIOLIB_IRQCHIP
CONFIG_IRQ_DOMAIN_HIERARCHY