On 6/7/07, Stephen Rowles <[EMAIL PROTECTED]> wrote: > Juerg Haefliger wrote: > >> It also seems that the via driver returns data at a different scale for > >> the CPU than the other data - sigh, so as described in the wiki link > >> above, you will need to scale the original temp up by a factor of 10 > >> before then scaling. > >> > > > > I'm the author of said driver. No need to sigh, that behavior is by > > design for good reasons :-) The driver returns what the chip reads at > > its inputs. For temp1, this value depends on the implementation of the > > board (value of external scaling resistors). The driver can't possibly > > know what does values are so scaling is left to the user. Temp2 is > > different since it's the chips internal temperature which is always > > identical for all boards and thus the driver does the correct scaling. > > > > Check out Documentation/hwmon/vt1211 in the kernel source tree for a > > detailed description of the driver. > > > > ...juerg > My sigh wasn't about the driver, more the slightly strange behaviour > difference between the sensors config and the config needed in freevo. I > understand that scaling has to be done outside the driver :) > > In /etc/sensors.conf there is the following for temp1: > > compute temp1 (@ - 73.869) / 0.9528, (@ * 0.9528) + 73.869 > > For most sensors using freevo idlebar plugin all you do is copy and past > the section "(@ - 73.869) / 0.9528" and let it do its stuff. However for > some reason to get this to work correctly you need to add the extra *10, > as I documented: > > ((@ * 10) - 73.869) / 0.9528') > > Just seems a bit weird and inconsistent, I don't know whats going on > here and why sensors.conf doesn't need the *10 scale but freevo does.
Err, no, don't blame this on the driver, the driver works just fine. The raw value reported via the sysfs interface is in 'millivolts' and needs to be adjusted according to the formula in sensors.conf: jabba:~# echo "(`cat /sys/devices/platform/vt1211.24576/temp1_input` / 1000 - 73.869) / 0.9528" | bc 41 The idlebar plugin must be doing something funny. > And thanks for the driver! Finally with 2.6.21 I have sensors that work, > I've been worrying about my board as I've squeezed it into a small case, > now I can rest easy that the temps are in range :D Assuming you trust the values? :-) Out of curiosity, what VIA board do you have? Can you control fan speeds on your board? ...juerg > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Freevo-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freevo-users > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Freevo-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freevo-users
