hwmontempsensor issue in dbus-sensor

[Ed Tanous]

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.