hwmontempsensor issue in dbus-sensor

[Kumar Thangavel]

Thanks Bruce for your response.

Please find below the entitymanager hwmon sensor configuration path for our
system.
https://github.com/openbmc/entity-manager/blob/master/configurations/FBYV2.json#L434

Thanks,
Kumar.



On Sat, Jan 1, 2022 at 1:42 AM Bruce Mitchell <
bruce.mitchell at linux.vnet.ibm.com> wrote:

> On 12/31/2021 09:30, Bruce Mitchell wrote:
> > On 12/20/2021 10:29, Ed Tanous wrote:
> >> On Sun, Dec 19, 2021 at 9:11 PM Kumar Thangavel
> >> <kumarthangavel.hcl at gmail.com> wrote:
> >>>
> >>> Hi All,
> >>>
> >>> Gentle Reminder on this.
> >>>
> >>> Thanks,
> >>> Kumar.
> >>>
> >>> On Thu, Dec 16, 2021 at 1:56 PM Kumar Thangavel
> >>> <kumarthangavel.hcl at gmail.com> wrote:
> >>>>
> >>>> Hi All,
> >>>>
> >>>>
> >>>> In dbus-sensors repo, I saw the patch for changes in Hwmon Temp
> Sensor.
> >>>>
> https://github.com/openbmc/dbus-sensors/commit/544e7dc58cecef898fe7d684c3ba0fbce178cf2d#diff-bfc8d7ed4ade4b3519ad3b7fe091f9c79a60faf8a26f410c1568e5341b22b7ab
> >>>>
> >>
> >> Bruce, this is your patch.  Could you take a look at the below and
> >> provide your input?
> >>
> >>>>
> >>>>
> >>>> While testing those changes in my platform, I found that each sensor
> >>>> in hwmon temp has been creating twice.
> >>>> After analyzed the patch, for below 2 paths SP_OUTLET_TEMP sensor is
> >>>> created twice.
> >>>>
> >>>>
> >>>> /sys/class/hwmon/hwmon2/temp2_input
> >>>> /sys/class/hwmon/hwmon2/temp1_input
> >>>>
> >>>>
> >>>> Before your change, hwmon temp sensor will check whether the path is
> >>>> already exists or not.
> >>>> If it exists, it will skip and proceed with next path.
> >>>>
> https://github.com/openbmc/dbus-sensors/commit/544e7dc58cecef898fe7d684c3ba0fbce178cf2d#diff-bfc8d7ed4ade4b3519ad3b7fe091f9c79a60faf8a26f410c1568e5341b22b7abL96
> >>>>
> >>>>
> >>>>
> >>>> Could you please explain why it is creating twice in hwmon temp ?
> >>>>
> >>>>
> >>>> Journalctl log before your changes applied :
> >>>>
> >>>>
> >>>> Dec 31 16:01:32 yosemitev2 hwmontempsensor[286]: Path :
> >>>> "/sys/class/hwmon/hwmon2/temp2_input"
> >>>> Dec 31 16:01:32 yosemitev2 hwmontempsensor[286]: Type :
> >>>> xyz.openbmc_project.Configuration.TMP421
> >>>> Dec 31 16:01:32 yosemitev2 hwmontempsensor[286]: Name : SP_OUTLET_TEMP
> >>>> Dec 31 16:01:32 yosemitev2 hwmontempsensor[286]: Dbus path :
> >>>> /xyz/openbmc_project/sensors/temperature/SP_OUTLET_TEMP
> >>>> Dec 31 16:01:32 yosemitev2 hwmontempsensor[286]: Dbus path :
> >>>> /xyz/openbmc_project/sensors/temperature/SP_OUTLET_REMOTE_TEMP
> >>>> Dec 31 16:01:32 yosemitev2 hwmontempsensor[286]: Path :
> >>>> "/sys/class/hwmon/hwmon2/temp1_input"
> >>>>
> >>>>
> >>>>
> >>>> Journalctl log after your changes applied :
> >>>>
> >>>>
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Path :
> >>>> "/sys/class/hwmon/hwmon2/temp2_input"
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Sensor type :
> >>>> xyz.openbmc_project.Configuration.TMP421
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Name : SP_OUTLET_TEMP
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Path :
> >>>> /xyz/openbmc_project/sensors/temperature/SP_OUTLET_TEMP
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Path :
> >>>> /xyz/openbmc_project/sensors/temperature/SP_OUTLET_REMOTE_TEMP
> >>>>
> >>>>
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Path :
> >>>> "/sys/class/hwmon/hwmon2/temp1_input"
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Sensor type :
> >>>> xyz.openbmc_project.Configuration.TMP421
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Name : SP_OUTLET_TEMP
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Path :
> >>>> /xyz/openbmc_project/sensors/temperature/SP_OUTLET_TEMP
> >>>> Dec 31 16:01:54 yosemitev2 hwmontempsensor[327]: Path :
> >>>> /xyz/openbmc_project/sensors/temperature/SP_OUTLET_REMOTE_TEMP
> >>>>
> >>>>
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Kumar.
> >
> > I will give it quick look today.  Also today is my last day at IBM.
> >
>
> The problem I had to solve was that I was adding devices
> (DPS310 and Si7020 type) that has more than one sensor type
> per device, in this case under /sys/bus/iio/devices .
> So the loop cannot continue after finding the first sensor of
> the device.  I have not seen p10bmc /sys/class/hwmon temperature
> sensors being created twice, in this case the TMP75.
>
> What is the entity-manager configuration for your system?
> I suspect that the dbus-sensors Hwmon does not take into account
> some detail that is needs to related to entity-manager.
>
>
>
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