Hi Oliver, > > BTW, may I ask how you did measure the frequency? > > I hooked an oscilloscope to the clock and data pins. Impressive :) I wish I had the necessary hardware to do so. > > May I know the SMBus speed (or rather slowness) is so important to > > you? > > The 3rd party board I am trying to use does not seem to like the > slower clock rate. Strange, usually most chips are fine with that (which is why they chose it, I guess). OK, you may try to apply the attached patch to your kernel tree. It attempts to change a PCI configuration bit which *might* switch the SMBus speed from 16kHz to 64kHz. I am not able to verify whether it works or not since I do not have an oscilloscope, and the i2c-viapro is poll-based so measuring performance from userspace doesn't help (the poll delay dominates the SMBus speed by a huge factor). Also it might not work for all VIA chips, I have no datasheets, I can't say. You tell me if it works for you :) -- Jean Delvare http://khali.linux-fr.org/ -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: linux-2.6.11-rc1-i2c-viapro-speed.diff Url: http://lists.lm-sensors.org/pipermail/lm-sensors/attachments/20050125/4511ea95/attachment.pl
