linux-sg2042/arch/mips/alchemy
Manuel Lauss 8e36579035 MIPS: Alchemy: Increase minimum timeout for 32kHz timer.
Since a clocksource change post 3.2-rc1, tasks on my DB1500 board
hang after random amounts of time (from a few minutes to a few hours),
regardless of load.  Debugging showed that the compare-match register
value is a few seconds lower than the current counter value.

The minimum value of 8 was initialy determined by a trial-and-error
approach.  Currently it is sufficient for all Alchemys (without PCI
apparently), independent of CPU clock;  only the DB1500 and DB1550
boards experience these timer-related tasks hangs now.

This patch increases the minimum timeout by 1 (to 9 counter ticks)
which seems sufficient since the systems are still working perfectly
fine after over 24 hours.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3214/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-02-20 18:33:18 +01:00
..
common MIPS: Alchemy: Increase minimum timeout for 32kHz timer. 2012-02-20 18:33:18 +01:00
devboards Merge branch 'next/alchemy' into mips-for-linux-next 2012-01-11 15:42:10 +01:00
Kconfig MIPS: Alchemy: one kernel for DB1000/DB1500/DB1100 2011-12-07 22:02:07 +00:00
Makefile MIPS: Alchemy: merge GPR/MTX-1/XXS1500 board code into single files 2011-12-07 22:02:06 +00:00
Platform MIPS: Alchemy: remove unused board headers 2011-12-08 10:42:15 +00:00
board-gpr.c MIPS: Alchemy: merge GPR/MTX-1/XXS1500 board code into single files 2011-12-07 22:02:06 +00:00
board-mtx1.c MIPS: Alchemy: merge GPR/MTX-1/XXS1500 board code into single files 2011-12-07 22:02:06 +00:00
board-xxs1500.c MIPS: Alchemy: merge GPR/MTX-1/XXS1500 board code into single files 2011-12-07 22:02:06 +00:00