Temperature Sensor Reading not showing up.

[Troy Lee]

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.
>> >>>> >
>> >>>> > 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
>> >>>> >