therm_pm72 units, interface

[Jan Engelhardt]

On Wednesday 2012-08-15 23:35, Benjamin Herrenschmidt wrote:
>> XServe G5 of mine started powering off more or less 
>> randomly
>
>BTW. There's a new windfarm driver for these in recent kernels...
>
>Appart from that, the trip points are coming from a calibration EEPROM,
>you may want to tweak the driver to warn a bit earlier or that sort of
>things ? (Or just to print more things out ?)

If you have more things to print/offer via sysfs, I'm all for it.

The XsG5 really has (by looking into the casing): 1 PCI Fan,
6 center fans, 1 PSU intake and 1 PSU outblow fan (this last one
seems rather slow-turning, but maybe that's normal).
It is not quite clear which is which in the sysfs display.

What I did figure out: at the PROM, fans run at what seems
to be full speed (some 8000-9000 rpm?). Once Linux and therm_pm72
are loaded, the fans settle down towards 4000 rpm, and if the machine
has warmed up, that is then when it powers off. (The kernel is indeed
3.4. I now need to figure out how to place a new kernel on it without
it powering off inbetween.)

>> $ cd /sys/devices/temperature; grep '' *;
>> backside_fan_pwm:32
>> backside_temperature:54.000
>> cpu0_current:34.423
>> cpu0_exhaust_fan_rpm:5340
>> cpu0_intake_fan_rpm:5340
>> cpu0_temperature:72.889
>> cpu0_voltage:1.252
>> cpu1_current:34.179
>> cpu1_exhaust_fan_rpm:4584
>> cpu1_intake_fan_rpm:4584
>> cpu1_temperature:68.526
>> cpu1_voltage:1.259
>> dimms_temperature:53.000
>> grep: driver: Er en filkatalog
>> modalias:platform:temperature
>> grep: power: Er en filkatalog
>> slots_fan_pwm:20
>> slots_temperature:38.500
>> grep: subsystem: Er en filkatalog
>> uevent:DRIVER=temperature
>> uevent:OF_NAME=fan
>> uevent:OF_FULLNAME=/u3 at 0,f8000000/i2c at f8001000/fan at 15e
>> uevent:OF_TYPE=fcu
>> uevent:OF_COMPATIBLE_0=fcu
>> uevent:OF_COMPATIBLE_N=1
>> uevent:MODALIAS=of:NfanTfcuCfcu