On Thu, Nov 01, 2012 at 07:12:08PM +0100, Jean Delvare wrote: > On Thu, 1 Nov 2012 10:17:07 -0700, Guenter Roeck wrote: > > On Thu, Nov 01, 2012 at 05:37:57PM +0100, Jean Delvare wrote: > > > On an IT8720F chip with temp3 configured for PECI: > > > > > > temp1_offset: 0 > > > temp2_offset: 0 > > > temp3_offset: -128000 > > > > > > I'm unsure how to interpret this -128000... This value is definitely > > > not neutral, doesn't sound very realistic. I would expect a positive > > > number for PECI. Maybe the offset register should be treated as > > > unsigned in PECI mode? Or maybe its value is irrelevant for the IT8720F > > > in PECI mode. > > > > > > # grep . /sys/class/hwmon/hwmon2/device/temp3* > > > /sys/class/hwmon/hwmon2/device/temp3_alarm:0 > > > /sys/class/hwmon/hwmon2/device/temp3_beep:1 > > > /sys/class/hwmon/hwmon2/device/temp3_input:25000 > > > /sys/class/hwmon/hwmon2/device/temp3_max:70000 > > > /sys/class/hwmon/hwmon2/device/temp3_min:127000 > > > /sys/class/hwmon/hwmon2/device/temp3_offset:-128000 > > > /sys/class/hwmon/hwmon2/device/temp3_type:6 > > > > > > This is with an it87 driver including all your recent patches. It you > > > have ideas or theories, I'm interested. > > > > > Hi Jean, > > > > I agree. The alternative (+128 degrees C) sounds a bit high, though. > > Maybe there is another register on IT8720F to store Tjmax ? Did you check > > in the register map if there is a register value that happens to match it ? > > How would I know which value I am looking for? k10temp says this: > high = +70.0°C, crit = +90.0°C, hyst = +87.0°C > but the monitored value doesn't match it87's temp3. > > > What happens if you change the offset register value to, say, 100 ? > > Does the reported temperature change as well ? > > Yes it does. > temp3_offset = 120000 -> temp3_input = 14000 > temp3_offset = 125000 -> temp3_input = 19000 > temp3_offset = -128000 -> temp3_input = 22000 > temp3_offset = -126000 -> temp3_input = 23000 > > This leads me to the conclusion that the offset registers are unsigned > in PECI mode. > If so, then only for AMD, or it is is a chip dependent. On Intel (with IT8728F): temp3_offset = -20000: temp3_input = -96000 temp3_offset = -10000: temp3_input = -87000 temp3_offset = 0: temp3_input = -76000 temp3_offset = 10000: temp3_input = -67000 temp3_offset = 20000: temp3_input = -56000 temp3_offset = 105000: temp3_input = 28000 (matches Tjmax / coretemp) I don't know what AMD uses as equivalent of Tjmax - maybe they use a fixed value of 128°C. > > Another maybe dumb question - is this with Intel or AMD CPU ? Because > > if it is AMD, it would not be PECI but AMDSI (something to fix if someone > > has a system w/ IT87xx and AMD CPU). > > It is AMD indeed, that's another issue I wanted to report. Do you > already know how to fix it? > Yes, I think so, at least I have an idea. Give me a couple of days. Guenter _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
