[v3.8 Regression] watchdog: sp5100_tco: Add SB8x0 chipset support

Tanaka Takahisa mc74hc00 at gmail.com
Sat Feb 23 06:14:32 UTC 2013

Hi Joseph,

Thank you for testing!
I will submit this patch to the linux-watchdog community after adding
commit log to patch.

2013/2/22 Joseph Salisbury <joseph.salisbury at canonical.com>:
> The I/O data can be seen at:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1116835/+attachment/3540738/+files/iomem.txt

In the case of SP5100 and SB7x0 chipset, the sp5100_tco driver
overwrites a free resource I/O memory address obtained by
allocate_resource() to the MMIO address registers for watchdog timer.
In the case of M3A78-CM, the sp5100_tco driver was using 0xfed45000 as
a MMIO address. Since 0xfed45000 is the free I/O memory resource
address, this is the expected behavior.

  [   18.852540] sp5100_tco: Using 0xfed45000 for watchdog MMIO address

However, Rewriting the MMIO address registers for the watchdog timer
must have generated the problem. I think that the problem has occurred
with the chipset or the BIOS layer. So, It's difficult for me to
investigate the problem, and the problem is critical. Thus, I decided
to delete the concerned codes.


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