openbmc Digest, Vol 30, Issue 51

[James Feist]

Hi Guhan,

I don't believe there is a way to do this today, but I have posted an 
RFC to dynamically collect the SDR info from dbus that you might be 
interested here: https://gerrit.openbmc-project.xyz/#/c/8521/

The ipmi maintainers I believe like this approach and plan on moving 
towards this once this code is integrated into the current ipmi libraries.

Thanks,

James


On 03/01/2018 05:49 PM, guhan balasubramanian wrote:
> Hi,
> 
> Currently in the IPMID (net and host) shared libraries, SDR and sensor 
> ipmi commands are addressed by querying the "IdInfoMap" data structure 
> (sensorhandler.cpp). This data structure is being filled up using 
> phosphor-sensor-inventory/config.yaml, during build time (as mentioned 
> by Patrick and Lei).
> 
> Assuming that we are not able to pre-fill the config yaml, is there a 
> way in the current implementation, where we can add sensors to this 
> sensors "IdInfoMap" data structure dynamically during run time?
> 
> Thanks,
> Guhan
> 
>     Date: Wed, 14 Feb 2018 10:36:23 -0800
>     From: Patrick Venture <venture at google.com <mailto:venture at google.com>>
>     To: Lei YU <mine260309 at gmail.com <mailto:mine260309 at gmail.com>>
>     Cc: "Sachin Naik (sachnaik)" <sachnaik at cisco.com
>     <mailto:sachnaik at cisco.com>>,
>              "openbmc at lists.ozlabs.org
>     <mailto:openbmc at lists.ozlabs.org>" <openbmc at lists.ozlabs.org
>     <mailto:openbmc at lists.ozlabs.org>>
>     Subject: Re: Porting hwmon sensors to openBMC
>     Message-ID:
>             
>     <CAO=notwMecK=GhvVUtgeVUZFV38K71Q5SSF0TeCS0CxY2W+axw at mail.gmail.com
>     <mailto:GhvVUtgeVUZFV38K71Q5SSF0TeCS0CxY2W%2Baxw at mail.gmail.com>>
>     Content-Type: text/plain; charset="UTF-8"
> 
>     Lei is correct. If you want, however, to read the sensors over IPMI
>     you'll need to add a yaml configuration for the sensors as well for
>     phosphor-host-ipmid.
>     See
>     https://github.com/openbmc/openbmc/blob/master/meta-openbmc-machines/meta-x86/meta-quanta/meta-q71l/recipes-phosphor/ipmi/q71l-ipmi-sensor-map/config.yaml
>     <https://github.com/openbmc/openbmc/blob/master/meta-openbmc-machines/meta-x86/meta-quanta/meta-q71l/recipes-phosphor/ipmi/q71l-ipmi-sensor-map/config.yaml>
>     for an example.
> 
>     On Tue, Jan 23, 2018 at 11:04 PM, Lei YU <mine260309 at gmail.com
>     <mailto:mine260309 at gmail.com>> wrote:
>      > On Tue, Jan 23, 2018 at 3:33 PM, Sachin Naik (sachnaik)
>      > <sachnaik at cisco.com <mailto:sachnaik at cisco.com>> wrote:
>      >> Hi All
>      >>
>      >> I am porting a new board to openbmc.
>      >> I have question on mapping hwmon type sensors to Dbus
>      >>
>      >> So far I have created machine layer and added U-boot config,
>     Kernel config and device tree. In kernel config I have enabled lm75
>     hwmon driver for LM75 temperature device. Corresponding entry added
>     in device tree.
>      >>
>      >> Right now I have created hwmon temperature sensors entry in our
>     machine layer by extending
>     recipes-phosphor/sensors/phosphor-hwmon%.bbappend
>      >> and created conf file with temperature sensors label.
>      >>
>      >> Now my question is how do implement/map dbus temperature sensor
>     value interface to our hwmon temperature sensors? Is above
>     implementation is enough or it requires
>      >> Some mapping for dbus to hwmon instance?
>      >
>      > After you added config files for the temperature sensors with
>      > phosphor-hwmon%.bbappend, phosphor-hwmon will read from
>      > hwmon instance and create dbus objects at
>      > /xyz/openbmc_project/sensors/, which will at least have "Value",
>      > “Scale" and "Unit" properties.
>      >
>      > I do not think it requires other configs, unless I misunderstand
>      > your case?
>      >
>      >>
>      >> Thanks and regards
>      >> Sachin
>      >>
>      >>
>