On Fri, 18 Jun 2010 12:13:25 -0700, Guenter Roeck wrote: > On Fri, 2010-06-18 at 14:10 -0400, Jonathan Cameron wrote: > > Another quick query. Are the _min / _max attributes as defined in the > > abi meant for alarms? I always thought they were to tell userspace the > > limits on measurement? > > > Good question. I thought it is supposed to refer to alarm limits, but I > may be wrong. > > Browsing through a couple of drivers, it _looks_ like the values are > used for alarm limits (eg adm1025 or lm85). Limits are not always set to Yes, these are alarms. _min and _max are really misnomers, these should have been _low and _high but by the time I realized it, _min and _max were already de facto standards and it was too late to change this. Documentation/hwmon/sysfs-interface says: Usual items are "input" (measured value), "max" (high threshold, "min" (low threshold). Specific occurrences are then left without details. If you think this document can be improved, I welcome patches. > useful values, though. This is what my CPU board returns: > > lm85-i2c-0-2e > Adapter: SMBus PIIX4 adapter at 0580 > V1.5: +1.80 V (min = +0.00 V, max = +3.32 V) > VCore: +1.29 V (min = +0.00 V, max = +2.99 V) > V3.3: +3.32 V (min = +0.00 V, max = +4.38 V) > V5: +5.00 V (min = +0.00 V, max = +6.64 V) > V12: +12.12 V (min = +0.00 V, max = +15.94 V) > > The lm85 datasheet says: "If a voltage input either exceeds the value > set in the voltage high limit register or falls below the value set in > the voltage low limit register, the corresponding bit will be set > automatically by the LM85 in the interrupt status registers (41-42h)." > > > Either way, one of us has misunderstood so perhaps the documentation needs > > to be more specific.... > > Agreed. -- Jean Delvare _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
