How to implement "#interrupt-cells = <2>" for a gpiochip?

Hello, I'm trying to use a GPIO as an interrupt on an mt7620 (using OpenWRT drivers) and I can't seem to figure out how to glue my two-celled interrupt description (including the trigger) to the device tree code.  This is the gpio driver I'm using: 

How to implement "#interrupt-cells = <2>" for a gpiochip?

Hello, I'm trying to use a GPIO as an interrupt on an mt7620 (using OpenWRT drivers) and I can't seem to figure out how to glue my two-celled interrupt description (including the trigger) to the device tree code.  This is the gpio driver I'm using: