Faking Sensor Readings

[rgrs]

Hi James,

I don't see any results for the grep command.

Our platform was built referencing Witherspoon IIRC.

Below links were used during porting,

https://github.com/openbmc/docs/blob/master/development/add-new-system.md

https://developer.ibm.com/linuxonpower/2019/01/07/how-to-port-openbmc/

I don't see "entity manager" being used in above links. Is it something specific to Intel servers?

If I were to port a new board today, which is the reference platform or guide to refer?

Thx,
Raj




‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Monday, December 9, 2019 11:58 PM, James Feist <james.feist at linux.intel.com> wrote:

> On 12/6/19 3:32 AM, rgrs wrote:
>
> > Hi,
> > I dont see any new service even after adding dbus-sensors.
> > Please can you point to any platform in upstream that I can refer to?
>
> https://github.com/openbmc/meta-intel/blob/daa333d956ad9391abcbb85468d9bc9f26ee1190/meta-common/recipes-intel/packagegroups/packagegroup-intel-apps.bb#L43
>
> https://github.com/openbmc/meta-facebook/blob/master/meta-tiogapass/recipes-fbtp/packagegroups/packagegroup-fb-apps.bb
>
> If you do a ps do you see any of the sensor daemons running?
>
> root at intel-obmc:~# ps | grep -i sensor
> 332 root 6008 S /usr/bin/adcsensor
> 333 root 6356 S /usr/bin/cpusensor
> 334 root 5784 S /usr/bin/exitairtempsensor
> 335 root 5696 S /usr/bin/fansensor
> 336 root 5608 S /usr/bin/hwmontempsensor
> 337 root 5660 S intrusionsensor
> 339 root 5716 S /usr/bin/ipmbsensor
> 340 root 5512 S /usr/bin/mcutempsensor
> 341 root 5868 S /usr/bin/psusensor
> 588 root 2776 S grep -i sensor
> root at intel-obmc:~#
>
> If so then you'll need to add entity-manager configurations like these:
>
> https://github.com/openbmc/entity-manager/blob/7d807754cc9153b04b599804464edd9654d7a81e/configurations/WFT Baseboard.json#L2023
>
> Thanks
>
> James
>
> > Thanks,
> > Raj
> > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> > On Wednesday, December 4, 2019 10:40 PM, James Feist james.feist at linux.intel.com wrote:
> >
> > > On 12/4/19 1:39 AM, rgrs wrote:
> > >
> > > > Hi James,
> > > > I tried busctl set-property, but the values didn't change.
> > > > Are the steps below correct?
> > > > (test with both 'field mode' enabled and disabled)
> > > > root at obmc:~# busctl introspect xyz.openbmc_project.Hwmon-2439434288.Hwmon1 /xyz/openbmc_project/sensors/temperature/INLET_TEMP xyz.openbmc_project.Sensor.Value --no-pager
> > > > NAME TYPE SIGNATURE RESULT/VALUE FLAGS
> > > > .MaxValue property x 0 emits-change writable
> > > > .MinValue property x 0 emits-change writable
> > > > .Scale property x -3 emits-change writable
> > > > .Unit property s "xyz.openbmc_project.Sensor.Value.Unit.… emits-change writable
> > >
> > > This looks like phosphor-hwmon, not dbus-sensors
> > > https://github.com/openbmc/dbus-sensors.
> > >
> > > > .Value property x 18500 emits-change writable
> > > > root at obmc:~# busctl --no-pager set-property xyz.openbmc_project.Hwmon-2439434288.Hwmon1 /xyz/openbmc_project/sensors/temperature/INLET_TEMP xyz.openbmc_project.Sensor.Value Value x 50000
> > > > root at saber:~# busctl --no-pager get-property xyz.openbmc_project.Hwmon-2439434288.Hwmon1 /xyz/openbmc_project/sensors/temperature/INLET_TEMP xyz.openbmc_project.Sensor.Value Value
> > > > x 18500
> > > > root at obmc:~#
> > > > Thanks,
> > > > Raj
> > > > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> > > > On Wednesday, December 4, 2019 1:34 AM, James Feist james.feist at linux.intel.com wrote:
> > > >
> > > > > On 12/3/19 5:49 AM, Alexander Amelkin wrote:
> > > > >
> > > > > > 03.12.2019 15:06, rgrs wrote:
> > > > > >
> > > > > > > Hi,
> > > > > > > How do I fake sensor readings in OpenBMC?
> > > > > > > We're trying to fake temperature sensors and make sure fans ramp up/down
> > > > > > > accordingly.
> > > > > >
> > > > > > We ended up patching the kernel driver to fake the readings by request.
> > > > > > I'm not aware of any ready interface in OpenBMC for that.
> > > > >
> > > > > If you're using d-bus sensors, the sensor property is writable. It is
> > > > > also supported by patching the sensor value in redfish.
> > > > >
> > > > > > With best regards,
> > > > > > Alexander Amelkin
> > > > > > /james.feist at linux.intel.com