Commit graph

7 commits

Author SHA1 Message Date
Mike Frysinger
f58bf804a1 Blackfin: avoid get_sclk() with early serial debug
When the clock functions were changed to use cached values (and thereby
avoiding expensive math functions), early serial debug broke because the
baud programming is called before external memory is available.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-05-06 08:47:27 -04:00
Mike Frysinger
aad4eca4ba Blackfin: audit UART for all known anomalies
There is no code change here, just new comments, but this keeps me from
having to do another audit from scratch in the future.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-04-06 17:37:49 -04:00
Mike Frysinger
f790ef6ff1 Blackfin: dynamically update UART speed when initializing
Previously, booting over the UART required the baud rate to be known ahead
of time.  Using a bit of tricky simple math, we can calculate the new board
rate based on the old divisors.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
2009-02-05 21:25:35 -05:00
Mike Frysinger
7633903bff Blackfin: allow serial console to be disabled
Some devices have no UART device pulled out, so allow people to disable the
driver completely in favor of other methods (like JTAG-console).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:15 -05:00
Mike Frysinger
51230e6e35 Blackfin: add portmuxing for UARTs on the BF51x
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:14 -05:00
Mike Frysinger
25cd33d82e Blackfin: make baud calculation more accurate
We should use the algorithm in the Linux kernel so that the UART divisor
calculation is more accurate.  It also fixes problems on some picky UARTs
that have sampling anomalies.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:51 -04:00
Mike Frysinger
9171fc8172 Blackfin: unify cpu and boot modes
All of the duplicated code for Blackfin processors and boot modes have been
unified.  After all, the core is the same for all processors, just the
peripheral set differs (which gets handled in the drivers).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-03-30 15:50:19 -04:00