linux/arch/arm/mach-ixp2000
Lennert Buytenhek e4fe19819e [PATCH] ARM: 2701/1: free up ixp2000 timer 4 for the watchdog
Patch from Lennert Buytenhek

The IXP2000 has four timers, but if we're on an A-step IXP2800, timer
2 and 3 don't work.  We need two timers for timekeeping (one for the
timer interrupt and one for tracking missed jiffies), so on early
IXP2800s we have no other choice but to use timer 1 and 4 for that,
but on all other IXP2000s we'd rather leave timer 4 free since that's
the only timer we can use for the watchdog.
So, on buggy IXP2000s (i.e. the A-step IXP2800) we use timer 4 for
tracking missed jiffies, and on all all non-buggy IXP2000s (i.e.
everything but the A-step IXP2800) we use timer 2.
On a pre-production IXP2800, this patch should print these messages
on boot:
	Enabling IXP2800 erratum #25 workaround
	Unable to use IXP2000 watchdog due to IXP2800 erratum #25
On any non-buggy IXP2800 (as well as on IXP2400s) you shouldn't see
anything at all, and the watchdog should be usable again.

Signed-off-by: Lennert Buytenhek
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 18:51:07 +01:00
..
core.c [PATCH] ARM: 2701/1: free up ixp2000 timer 4 for the watchdog 2005-06-20 18:51:07 +01:00
enp2611.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ixdp2x00.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ixdp2x01.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ixdp2400.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ixdp2800.c [PATCH] ARM: 2660/2: fix ixdp2800 boot and pci init 2005-04-29 22:13:57 +01:00
Kconfig Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile.boot Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci.c [PATCH] ARM: 2659/1: do not assign PCI I/O address zero on IXP2000 2005-04-29 21:58:16 +01:00