CONFIG_ORION_IRQCHIP (not configurable)

modulename: irq-orion.ko

configname: CONFIG_ORION_IRQCHIP

Linux Kernel Configuration
└─>Device Drivers
└─>IRQ chip support
└─>ORION_IRQCHIP
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/irqchip/irq-orion.c
selects
CONFIG_IRQ_DOMAIN
CONFIG_GENERIC_IRQ_MULTI_HANDLER