This is my suggestion to enable mmio32be for earlycon like written in: https://lkml.org/lkml/2015/4/15/250 Noam Camus (1): serial: earlycon: Add support for big-endian MMIO accesses Documentation/kernel-parameters.txt | 9 +++++---- drivers/tty/serial/earlycon.c | 9 ++++++--- drivers/tty/serial/serial_core.c | 7 +++++-- -- 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