openbmc Digest, Vol 30, Issue 51

[guhan balasubramanian]

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>
> To: Lei YU <mine260309 at gmail.com>
> Cc: "Sachin Naik (sachnaik)" <sachnaik at cisco.com>,
>         "openbmc at lists.ozlabs.org" <openbmc at lists.ozlabs.org>
> Subject: Re: Porting hwmon sensors to openBMC
> Message-ID:
>         <CAO=notwMecK=GhvVUtgeVUZFV38K71Q5SSF0TeCS0CxY2W+axw at mail.gm
> ail.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
> for an example.
>
> On Tue, Jan 23, 2018 at 11:04 PM, Lei YU <mine260309 at gmail.com> wrote:
> > On Tue, Jan 23, 2018 at 3:33 PM, Sachin Naik (sachnaik)
> > <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
> >>
> >>
>
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