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    Subject[PATCH 00/06] serial8250: DLL/DLM rework, Emma Mobile UART driver
    serial8250: DLL/DLM rework, Emma Mobile UART driver

    [PATCH 01/06] serial8250: Add dl_read()/dl_write() callbacks
    [PATCH 02/06] serial8250: Use dl_read()/dl_write() on Alchemy
    [PATCH 03/06] serial8250: Use dl_read()/dl_write() on RM9K
    [PATCH 04/06] serial8250: Clean up default map and dl code
    [PATCH 05/06] serial8250: Introduce serial8250_register_8250_port()
    [PATCH 06/06] serial8250-em: Add Emma Mobile UART driver

    This series cleans up and adjusts the 8250 code base to allow
    hooking in a driver for the UART in Emma Mobile SoCs.

    In short:
    - Patch 1-4 tie in 8250-specific dl_read()/dl_write() callbacks.
    - Patch 5 adds a new register function to use new callbacks.
    - Patch 6 adds a new driver that makes use of the above.

    I'd be happy to rework the above patches if needed. The
    main challenge for Emma Mobile UART support is the non-
    standard offsets for DLL and DLM registers.

    Note that there is no DT support included at this point,
    but it boils down to a 10 line change. The boot loader on
    my board does not do DT so I'd like to use kexec for DT
    development (as usual), but to use kexec I first need to
    get a non-DT kernel working. Which is basically this. =)

    Signed-off-by: Magnus Damm <>

    Builds on top of linux-next 20120501.

    drivers/tty/serial/8250/8250.c | 373 ++++++++++++++++++-------------------
    drivers/tty/serial/8250/8250.h | 14 +
    drivers/tty/serial/8250/8250_em.c | 179 +++++++++++++++++
    drivers/tty/serial/8250/Kconfig | 8
    drivers/tty/serial/8250/Makefile | 1
    include/linux/serial_8250.h | 1
    6 files changed, 392 insertions(+), 184 deletions(-)

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