Hello,

> I tried your kernel, didn't crash, but didn't see anything fan related, 
> but it's a G3
> (hw.model = 750fx rev 2.2) and, dev /uni-n/i2c/fan .properties has 
> "adm1030" in compatibility and type fields, so I guess I shouldn't be 
> surprised.
Ok, I've made a highly experimental driver for the adm1030, since I don't have a way to test it I can't tell you if it works or even attaches, you'll have to see yourself :)
Try this one:
http://macallan.homeunix.org:6704/stuff/BSD/netbsd_GENERIC_sensors.bz2
Should work on any Mac supported by macppc and contains both sensor drivers.

have fun
Michael