On 06/19/10 09:27, Jean Delvare wrote: > 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). Ah, I missed that general defining of terms. It's fine as is unless we end up with lots of people not reading it properly like me ;) > > 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. > _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
