Keystone 2 IRQ controller IP

modulename: irq-keystone.ko

configname: CONFIG_KEYSTONE_IRQ

Linux Kernel Configuration
└─>Device Drivers
└─>IRQ chip support
└─>Keystone 2 IRQ controller IP
In linux kernel since version 3.18 (release Date: 2014-12-07)  
Support for Texas Instruments Keystone 2 IRQ controller IP which
is part of the Keystone 2 IPC mechanism

source code:
drivers/irqchip/irq-keystone.c