Re: CVS commit: src/sys/arch/sparc64/dev

[Julian Coleman <jdc%coris.org.uk@localhost>]

Hi Tobias,

> If you're interested there is an older version[1] of envctrl in the
> Attic that might be relevant to use for reference. It supported fan
> speed controls on E450. IIRC I got some of the magic constants from
> OpenSolaris. Sadly I don't own an E450 any more.
> 
> [1] cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/arch/sparc64/dev/Attic/envctrl.c?rev=1.11&content-type=text/plain&only_with_tag=MAIN

Thank you - that's useful information!

Related to the magic offsets, I noticed that the value read from the sensor
was always lower than the value written.  However, it doesn't appear to be
a constant difference (I see about 15 for most values, but only 5 for the
minimum).  I think that it's OK to keep the higher value - it'll mean that
we run the fans slightly faster.  The CPU temperature on my E250 doesn't
reach the minimum threshold where the fan speed actually increases, so I
don't think that this will have any impact.

The GPIO values there helps to see what values I should be checking for too.

It would be good to merge this with the current code, but I only have an
E250 to test on, so I'll need to find a volunteer.

Regards,

Julian