Bug#597820: linux-image-2.6.32-5-amd64: 2.6.32 doesn't support the f71889fg sensor chip

[Mike Hommey <mh@glandium.org>]

On Sun, Oct 03, 2010 at 01:33:23AM +0200, Giel van Schijndel wrote:
> On Sun, Oct 03, 2010 at 01:14:24AM +0200, Giel van Schijndel wrote:
> > On Sat, Oct 02, 2010 at 08:42:19PM +0100, Ben Hutchings wrote:
> >> On Tue, 2010-09-28 at 10:36 +0200, Mike Hommey wrote:
> >>> I would also be interested in the watchdog support for the same chip,
> > 
> > That patch does *not* add watchdog support for the Fintek F71889FG chip,
> > it *only* adds support for the F71808E and the F71882FG.  Additionally a
> > patch for the F71862FG is currently pending review and inclusion.
> > 
> > That being said, this driver should be fairly easy to expand to include
> > support for the F71889FG chip (AFAIK only pin-configuration should be
> > added, which probably is just a datasheet-reading exercise).  Adding
> > support however would be something I'd suggest doing across the LKML
> > *first*, then (optionally) backport it later.
> 
> Heck I gave it a try and attached you'll find a patch to add F71889FG
> support to the current f71808e_wdt watchdog driver.  The reason I
> haven't send this to the LKML before however, is that I don't have any
> system with that chip to test it, so please do test it and tell me the
> results.

I gave a try to your patch, on top of the other ones.

For the kernel team, please note that some of the patches don't apply
cleanly on 2.6.32, because of some changes in context (mostly coding-style
changes) that apparently happened between 2.6.32 and the various patches
landing. I manually edited the patches to make them apply properly, please
ping me if you want the modified versions. The configs also need to be
modified to include CONFIG_F71808E_WDT=m.

Still for the kernel team, applying the release_mutex_region patch
makes the ABI check script barf with the following changes:
__devm_release_region                            module: vmlinux,
version: 0x969a2a91 -> 0x70191467, export: EXPORT_SYMBOL
__devm_request_region                            module: vmlinux,
version: 0x51144912 -> 0x9e7acb57, export: EXPORT_SYMBOL

For Giel, it appears the watchdog driver doesn't entirely work:
It loads fine:
        f71808e_wdt: Found f71889fg watchdog chip, revision 21
But watchdog-test (as from Documentation/watchdog/src/watchdog-test.c)
doesn't work and outputs:
        Watchdog device not enabled.
stracing it shows this:
        open("/dev/watchdog", O_WRONLY)         = -1 ENODEV (No such
        device)

Please tell me if you need more feedback.

Thanks,

Mike