Temperature Sensor Reading not showing up.

Kun Yi kunyi at google.com
Wed Nov 7 06:22:50 AEDT 2018 

Well the temp1_input not showing in sysfs is related to linux kernel, not
with userspace. Please double check your device tree node matches physical
bus, and the corresponding kernel configs are enabled. Attach dmesg and
bootlog would be  helpful for people to help debug.

On Tue, Nov 6, 2018 at 1:53 AM AKASH G J <akashgj91 at gmail.com> wrote:

> I corrected the path of the environment file to be
> meta-zaius/recipes-phosphor/sensors/phosphor-hwmon%/obmc/hwon/ahb/apb/i2c at 1e78a000
> /i2c-bus at 440/tmp75 at 48.conf.
>
> Still temp1_input is not coming on the sysfs (/sys/class/hwmon/hwmon0)
>
> On Tue, Nov 6, 2018 at 12:01 PM Kun Yi <kunyi at google.com> wrote:
>
>>
>> On Mon, Nov 5, 2018 at 10:17 PM Troy Lee <leetroy at gmail.com> wrote:
>>
>>> The *service* here doesn't relate to systemd service.
>>>
>>> It is the name on D-Bus.
>>> https://github.com/openbmc/phosphor-hwmon#d-bus-bus-names
>>>
>>> Try this command to list all the services related to hwmon:
>>> # busctl --no-page list | grep -E "Hwmon1|PID"
>>>
>>> First column will be the service name.
>>>
>>> Yu-Ting Lee (Troy Lee) <LeeTroy at gmail.com>
>>> AKASH G J <akashgj91 at gmail.com> 於 2018年11月5日 週一 下午4:40寫道：
>>> >
>>> > No such service is available in root file system. The output of the
>>> command ls / -R | grep Hwmon  is
>>> >
>>> > root at zaius:~# ls / -R | grep Hwmon
>>> > xyz.openbmc_project.Hwmon at .service
>>> > system-xyz.openbmc_project.Hwmon.slice
>>> >
>>> /sys/fs/cgroup/systemd/system.slice/system-xyz.openbmc_project.Hwmon.slice:
>>> > system-xyz.openbmc_project.Hwmon.slice
>>> >
>>> /sys/fs/cgroup/unified/system.slice/system-xyz.openbmc_project.Hwmon.slice:
>>> > root at zaius:~#
>>> >
>>> > On Mon, Nov 5, 2018 at 1:20 PM Troy Lee <leetroy at gmail.com> wrote:
>>> >>
>>> >> Your service path doesn't look right.
>>> >>
>>> >> According to:
>>> >>
>>> https://github.com/openbmc/docs/blob/master/sensor-architecture.md#d-bus
>>> >>
>>> >> It should be something like this:
>>> >>   xyz.openbmc_project.Hwmon-<hash>.Hwmon1
>>> >>
>>> >>
>>> >>
>>> >> Yu-Ting Lee (Troy Lee) <LeeTroy at gmail.com>
>>> >> AKASH G J <akashgj91 at gmail.com> 於 2018年11月5日 週一 下午2:55寫道：
>>> >> >
>>> >> > I tried the command busctl --system introspect
>>> xyz.openbmc_project.Hwmon at .service
>>> /xyz/openbmc_project/Sensors/temperature/ambient
>>> xyz.openbmc_project.sensor.Threshold.Warning | grep property and it outputs
>>> >> >
>>> >> > Failed to introspect object
>>> /xyz/openbmc_project/Sensors/temperature/ambient of service
>>> xyz.openbmc_project.Hwmon at .service: Invalid argument.
>>> >> >
>>> >> > I added the file
>>> meta-zaius/recipes-phosphor/sensors/phosphor-hwmon%/obmc/hwmon/ahb/apb/i2c at 1e6e2000
>>> /i2c-bus at 90/tmp75 at 48.conf in machine configuration directory with the
>>> following contents for dbus mapping.
>>> >> >
>>> >> > LABEL_temp1 = ambient
>>> >> > WARNLO_temp1=-40
>>> >> > WARNHI_temp1=125
>>> >> >
>>> >> > Whether this is correct or not?
>>> >> >
>>> >> > On Fri, Nov 2, 2018 at 8:57 PM Emily Shaffer <
>>> emilyshaffer at google.com> wrote:
>>> >> >>
>>> >> >> Have you tried a dbus introspect to see if the sensor is coming
>>> across dbus correctly? There is a sample introspect command on the sensor
>>> howto, check out the busctl usage.
>>> https://github.com/openbmc/docs/blob/master/sensor-architecture.md
>>> >> >>
>>> >> >> On Fri, Nov 2, 2018, 3:21 AM AKASH G J <akashgj91 at gmail.com>
>>> wrote:
>>> >> >>>
>>> >> >>> I added the sensor configuration to phosphor-host-ipmid's sensor
>>> configuration like.
>>> >> >>>
>>> >> >>> 0x12: &temperature
>>> >> >>>   sensorType: 0x01
>>> >> >>>   path: /xyz/openbmc_project/sensors/temperature/ambient
>>> >> >>>   sensorReadingType: 0x01
>>> >> >>>   multiplierM: 235
>>> >> >>>   offsetB: 0
>>> >> >>>   bExp: 0
>>> >> >>>   unit: xyz.openbmc_project.Sensor.Value.Unit.DegreesC
>>> >> >>>   scale: -3
>>> >> >>>   rExp: -3
>>> >> >>>   serviceInterface: org.freedesktop.DBus.Properties
>>> >> >>>   readingType: readingData
>>> >> >>>   interfaces:
>>> >> >>>     xyz.openbmc_project.Sensor.Value:
>>> >> >>>       Value:
>>> >> >>>         Offsets:
>>> >> >>>           0xFF:
>>> >> >>>             type: int64_t
>>> >> >>>
>>> >> >>>
>>> >> >>> When I run the command ipmitool -I dbus sdr elist full, it gives
>>> the following.
>>> >> >>>
>>> >> >>> ambient          | 12h | ns  |  0.0 | Disabled
>>> >> >>>
>>> >> >>> It is not giving the sensor reading and it is showing the sensor
>>> device is disabled.
>>> >> >>>
>>> >> >>> On Thu, Nov 1, 2018 at 11:28 PM Patrick Venture <
>>> venture at google.com> wrote:
>>> >> >>>>
>>> >> >>>> On Tue, Oct 30, 2018 at 10:13 PM AKASH G J <akashgj91 at gmail.com>
>>> wrote:
>>> >> >>>> >
>>> >> >>>> > Hi All,
>>> >> >>>> >
>>> >> >>>> > I built OpenBMC Linux using Zaius configuration and booted on
>>> BMC Aspeed AST-2500. The board we are using have one temperature sensor
>>> (Texas Instruments TMP75) on I2C-12 interface.
>>> >> >>>> >
>>> >> >>>> > I added the file
>>> meta-zaius/recipes-phosphor/sensors/phosphor-hwmon%/obmc/hwmon/ahb/apb/i2c at 1e6e2000
>>> /i2c-bus at 90/tmp75 at 48.conf in machine configuration directory with the
>>> following contents.
>>> >> >>>> >
>>> >> >>>> > LABEL_temp1 = ambient
>>> >> >>>> > WARNLO_temp1=-40
>>> >> >>>> > WARNHI_temp1=125
>>> >> >>>> >
>>> >> >>>> > I added the following patch to the kernel file
>>> linux/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts.
>>> >> >>>> >
>>> >> >>>> >  &i2c12 {
>>> >> >>>> > -    status = "disabled";
>>> >> >>>> > +    status = "okay";
>>> >> >>>> > +
>>> >> >>>> > +    tmp75 at 48 {
>>> >> >>>> > +        compatible = "ti,tmp75";
>>> >> >>>> > +        reg = <0x48>;
>>> >> >>>> > +    };
>>> >> >>>> > +
>>> >> >>>> >  };
>>> >> >>>> >
>>> >> >>>> > After booting Linux, the changes are reflected in
>>> /sys/firmware/devicetree/base/ahb/apb/i2c at 1e78a000/i2c-bus at 440/tmp75 at 48.
>>> Also,
>>> >> >>>> > tmp78.conf is showing in
>>> /etc/default/obmc/hwmon/ahb/apb/i2c at 1e78a000/i2c-bus at 90.
>>>
>>
>> Besides what others suggested looks like you have a mismatch between your
>> device path and the path for the environment file. They need to have the
>> same path.
>>
>> Steps to try:
>> 1. Fix the path of your environment file to be
>> meta-zaius/recipes-phosphor/sensors/phosphor-hwmon%/obmc/hwon/ahb/apb/i2c at 1e78a000
>> /i2c-bus at 440/tmp75 at 48.conf
>> 2. Make sure the hwmon sysfs interface shows up and temp1_input reads a
>> valid value
>> 3. Play with busctl as others suggested and make sure the sensor value is
>> reported over DBus
>>
>>
>>> >> >>>> >
>>> >> >>>> > when I am running the ipmitool command: ipmitool -I dbus sdr
>>> elist full it is not showing the temperature sensor and its reading.
>>> >> >>>> >
>>> >> >>>> > Please someone help to resolve the problem.
>>> >> >>>>
>>> >> >>>> You'll need to add the sensor configuration to the
>>> >> >>>> phosphor-host-ipmid's sensor configuration, see:
>>> >> >>>>
>>> >> >>>>
>>> https://github.com/openbmc/openbmc/blob/master/meta-ingrasys/meta-zaius/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory%25/config.yaml
>>> >> >>>>
>>> >> >>>> >
>>> >> >>>> >
>>> >> >>>> > Thanks and Regards,
>>> >> >>>> >
>>> >> >>>> > Akash
>>> >> >>>> >
>>>
>>
>>
>> --
>> Regards,
>> Kun
>>
>

-- 
Regards,
Kun
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