> Driver is probed with no IRQ (NO_IRQ = -1 on Microblaze) > 83e00000.serial: ttyS0 at MMIO 0x83e01003 (irq = -1) is a 16550A Zero means no IRQ. NO_IRQ is a legacy internal thing for the old IDE code so not something other code should be using. Setting the IRQ to -1 is bogus and will confuse the rest of the kernel. > Is it possible to use serial driver without IRQ - or blocking IRQ, etc.? Within limits - it kills your power management and data rates because of the continual polling. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html