SERIAL_IRQ 22 include/asm-mn10300/unit-asb2303/serial.h #define SERIAL_IRQ XIRQ0 /* Dual serial (PC16552) (Hi) */ SERIAL_IRQ 21 include/asm-mn10300/unit-asb2305/serial.h #define SERIAL_IRQ XIRQ0 /* Dual serial (PC16552) (Hi) */