Testers needed - sdtemp on-DIMM memory temperature sensor driver

[Paul Goyette <paul%whooppee.com@localhost>]

If anyone out there has a system with DDR3 memory, you almost certainly 
have a temperature sensor on the DIMM, probably integrated with the SPD 
EEPROM.  (Some DDR2 FB-DIMMs and SO-DIMMs might also have this sensor.)

I've written a driver to integrate this sensor with NetBSD's envstat(8)
system, and would like to have some folks test it out.  If you're up for 
the experiment, you can download a GENERIC kernel with the new driver 
from

        ftp://ftp.whooppee.com/public/netbsd-GENERIC-I2C-amd64
   or   ftp://ftp.whooppee.com/public/netbsd-GENERIC-I2C-i386

Just boot the kernel, and see if the sensor shows up in the output from 
envstat.  If you're really brave, you can check to see if the sysctl 
variables used to set the Alarm Window and Critical Limit registers are 
available and working:

        sysctl hw.sdtemp0
        sysctl -w hw.sdtemp0.limits.crit_limit=60

Once I get some test results back, I'll be contributing this to TNF, but 
if you want sources in the interim, I'll make them available.

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