The GPIO controller of mt7621 can receive interrupts on any of the GPIOs, either edge or level. It then interrupts the CPU using GIC INT12. Update device tree accordly. Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> Reviewed-by: NeilBrown <neil@brown.name> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>