Porting hwmon sensors to openBMC

Patrick Venture venture at google.com
Thu Feb 15 05:36:23 AEDT 2018

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
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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