entity-manager experiments

[Patrick Venture]

On Fri, Jul 26, 2019 at 4:40 PM Patrick Venture <venture at google.com> wrote:
>
> Hi,
>
> I was curious if you had any thoughts on what is missing here -- I
> wrote a basic json file:
>
> razorback.json:
> {
>     "Exposes": [
>         {
>             "Address": "$address",
>             "Bus": "$bus",
>             "Name": "Razorback",
>             "Type": "EEPROM"
>         },
>         {
>             "Address": "0x4c",
>             "Bus": "$bus",
>             "Name": "Razorback Temp Sensor",
>             "Type": "TMP421"
>         }
>     ],
>     "Name": "Razorback Board",
>     "Probe" : "xyz.openbmc_project.FruDevice({'PRODUCT_PRODUCT_NAME':
> '.*Razorback'})",
>     "Type": "Board",
>     "xyz.openbmc_project.Inventory.Decorator.Asset": {
>         "Manufacturer": "$PRODUCT_MANUFACTURER",
>         "Model": "$PRODUCT_PRODUCT_NAME",
>         "PartNumber": "$PRODUCT_PART_NUMBER",
>         "SerialNumber": "$PRODUCT_SERIAL_NUMBER"
>     }
> }
>
> And it finds it:
> Service xyz.openbmc_project.EntityManager:
> `-/xyz
>   `-/xyz/openbmc_project
>     |-/xyz/openbmc_project/EntityManager
>     `-/xyz/openbmc_project/inventory
>       `-/xyz/openbmc_project/inventory/system
>         `-/xyz/openbmc_project/inventory/system/board
>           `-/xyz/openbmc_project/inventory/system/board/Razorback_Board
>             |-/xyz/openbmc_project/inventory/system/board/Razorback_Board/Razorback
>             `-/xyz/openbmc_project/inventory/system/board/Razorback_Board/Razorback_Temp_Sensor
>
> Service xyz.openbmc_project.FruDevice:
> `-/xyz
>   `-/xyz/openbmc_project
>     `-/xyz/openbmc_project/FruDevice
>       `-/xyz/openbmc_project/FruDevice/_0
>
> I don't know why it's named _0, but I can debug that later.
>
> So I introspect on it:
> busctl introspect --no-pager xyz.openbmc_project.EntityManager
> /xyz/openbmc_project/inventory/system/board/Razorback_Board/Razorback_Temp_Sensor
> NAME                                     TYPE      SIGNATURE
> RESULT/VALUE            FLAGS
> org.freedesktop.DBus.Introspectable      interface -         -
>               -
> .Introspect                              method    -         s
>               -
> org.freedesktop.DBus.Peer                interface -         -
>               -
> .GetMachineId                            method    -         s
>               -
> .Ping                                    method    -         -
>               -
> org.freedesktop.DBus.Properties          interface -         -
>               -
> .Get                                     method    ss        v
>               -
> .GetAll                                  method    s         a{sv}
>               -
> .Set                                     method    ssv       -
>               -
> .PropertiesChanged                       signal    sa{sv}as  -
>               -
> xyz.openbmc_project.Configuration.TMP421 interface -         -
>               -
> .Address                                 property  t         76
>               emits-change
> .Bus                                     property  t         17
>               emits-change
> .Name                                    property  s
> "Razorback Temp Sensor" emits-change
> .Type                                    property  s         "TMP421"
>               emits-change
>
> and all that looks correct, and now there's an i2c device at 17-004c,
> but no hwmon path, and:
>
> Jul 25 00:27:24 machine intrusion-sensor[2654]: Error communicating to
> entity manager
> Jul 25 00:27:24 machine intrusion-sensor[2654]: error communicating to
> entity manager
> Jul 25 00:27:24 machine fansensor[2671]: Error communicating to entity manager
> Jul 25 00:27:24 machine fansensor[2671]: error communicating to entity manager
> Jul 25 00:27:24 machine fansensor[2671]: Error calling entity manager
> Jul 25 00:27:24 machine adcsensor[2658]: Error communicating to entity manager
> Jul 25 00:27:24 machine adcsensor[2658]: error communicating to entity manager
> Jul 25 00:27:25 machine mcutempsensor[2689]: Error contacting entity manager
> Jul 25 00:27:25 machine hwmontempsensor[2675]: Error communicating to
> entity manager
> Jul 25 00:27:25 machine hwmontempsensor[2675]: error communicating to
> entity manager
> Jul 25 00:27:26 machine psusensor[2677]: Error communicating to entity manager
> Jul 25 00:27:26 machine psusensor[2677]: error get sensor config from
> entity manager
> Jul 25 00:27:27 machine ipmbsensor[2674]: Error contacting entity manager
> Jul 25 00:27:27 machine cpusensor
[2666]: Error communicating to entity manager
> Jul 25 00:27:27 machine entity-manager[2694]: Clearing previous configuration
>
> Service xyz.openbmc_project.HwmonTempSensor:
> Only root object discovered.
>
> Any thoughts on the disconnect?  Have you seen anything like this?

I had a hunch the driver was missing:

tmp/work-shared/machine/kernel-build-artifacts/.config:1827:#
CONFIG_SENSORS_TMP421 is not set

... ok, so that makes sense then! :D  Will try fixing that first!

>
> Patrick