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8 commits

Author SHA1 Message Date
David Brownell
06bffc6ea5 rm9200 lowevel_init: don't touch reserved/readonly registers
For some reason the AT91rm9200 lowlevel init writes to a bunch of
reserved or read-only addresses.  All the boards seem to define the
value-to-be-written values as zero ... but they shouldn't actually
be writing *anything* there.

No documented erratum justifies these accesses.  It looks like maybe
some pre-release BDI-2000 setup code has been carried along by cargo
cult programming since at least late 2004 (per GIT history).

Here's a patch disabling what seems to be bogosity.  Tested on a
csb337; there were no behavioral changes.

Signed-off-by: David Brownell <david-b@pacbell.net>

on RM9200ek
Tested-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2009-08-03 09:26:26 +02:00
Jean-Christophe PLAGNIOL-VILLARD
3dd9395a0d at91rm9200: move define from lowlevel_init to header
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2009-01-06 21:41:59 +01:00
Jean-Christophe PLAGNIOL-VILLARD
d481c80d78 at91rm9200: rename lowlevel init value to CONFIG_SYS_
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2009-01-06 21:37:39 +01:00
Jean-Christophe PLAGNIOL-VILLARD
6d0f6bcf33 rename CFG_ macros to CONFIG_SYS
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-10-18 21:54:03 +02:00
David Brownell
480ed1dea1 use correct at91rm9200 register name
This fixes a naming bug for at91rm9200 lowlevel init code:
NOR boot flash is on chipselect 0, not chipselect 2.  This
makes code use the register name from chip datasheets.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
2008-03-30 15:38:05 +02:00
Wolfgang Denk
c0e82d5016 Set the AT91RM9200 clock to asynchronous mode
Patch by Anders Larsen, 03 May 2005
2005-10-05 02:06:08 +02:00
Wolfgang Denk
3b9dfddfd8 Set the AT91RM9200 clock to synchronous mode
Patch by Anders Larsen, 29 Apr 2005
2005-10-05 02:02:25 +02:00
wdenk
a85f9f21aa Patch by Steven Scholz, 06 Apr 2005:
- creating SoC subdir for Atmel AT91RM9200 cpu/arm920t/at91rm9200
- moving code out of cpu/at91rm9200 into cpu/arm920t/at91rm9200
2005-04-06 13:52:31 +00:00
Renamed from cpu/at91rm9200/lowlevel.S (Browse further)