> -----Original Message----- > From: lm-sensors-bounces at lm-sensors.org > [mailto:lm-sensors-bounces at lm-sensors.org] On Behalf Of > Sebastian Flothow > Sent: Sunday, August 12, 2007 11:56 AM > To: lm-sensors > Subject: Re: Andigilog aSC7621 on Intel 975XBX2 > - mostly working > > Am 12. Aug 2007 um 00:43 Uhr schrieb Sebastian Flothow: > > Am 12. Aug 2007 um 00:19 Uhr schrieb George Joseph ((dev)): > >> Try ... > >> http://www.peakin.com/download/asc76xx-2.6.22.2.patch > > > > Does compile against 2.6.16.52-xen, with hwmon debugging turned on. > > I'll boot it tomorrow. > > Works, debug messages appear in dmesg, and PECI is enabled by > default. > Nice. > > I took a closer look at the PWM stuff this time and found > it's behaving > a bit weird. > > Setting pwm?_enable to 0 should cause the fan to run at full speed, > right? This is not really clear in > Documentation/hwmon/sysfs-interface, > though. > When setting pwm[12]_enable to 0, I can't observe any effect at all; > setting pwm3_enable to 0 causes the fans 3 and 4 to stop. Pwm?_enable = 0 means disable the fan. The driver makes no distinction between the 3 pwm settings whatsoever but remember, pwm 1 & 2 are 4-wire interfaces and pwm 3 is a 3 wire interface. Also, there are other settings that can affect what happens to the fan when "disabled". Take a look at the datasheet (http://www.andigilog.com/downloads/aSC7621_70A06010.pdf) and in the mean time, I'll run another set of tests. Also, on 1 of my 3 boards, the pwm1 output is inverted. I.E. 0=full, 255=off. Don't ask me why. I have to set pwm1_invert=1 to get it to behave correctly. > > With pwm?_enable set to 1 (manual), it seems that 51 is the effective > minimum for pwm1 - I can set it to lower values, and read them back, > but the fan won't get any slower than at 51. For pwm2 and pwm3, this > limit is 76. Why is this? > Unfortunately, this is a question for Intel and Andigilog. I see the same. > > _______________________________________________ > lm-sensors mailing list > lm-sensors at lm-sensors.org > http://lists.lm-sensors.org/mailman/listinfo/lm-sensors >
