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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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