Fan PWM monitoring and control

[Lei YU]

On Tue, Sep 17, 2019 at 6:48 PM rgrs <rgrs at protonmail.com> wrote:
>
> Hi,
>
> I need some help with phosphor hwmon related to fan sensors.
>
> I'm trying to control Fans in a server motherboard using ADT7462 controller. Hw mon porting is done and the sysfs interfaces are working as expected.
>
> While I am able to read RPM, i don't find pwm/target to control the fans exposed as dbus objects.

Could you elaborate the issue?
And could you try to introspect the fan sensor to see what interfaces
it implements?

    service=`mapper get-service /xyz/openbmc_project/sensors/fan_tach/xxx`
    busctl introspect $service /xyz/openbmc_project/sensors/fan_tach/xxx

>
> # busctl --no-page tree xyz.openbmc_project.FanSensor
> Failed to introspect object / of service xyz.openbmc_project.FanSensor: The name is not activatable
> No objects discovered.
>
> I came across this post, I think it is similar to my issue. (https://gerrit.openbmc-project.xyz/c/openbmc/phosphor-hwmon/+/8353)
>
> Please someone point to latest documentation or reference Fan porting from openBMC repo?
> What are the exact fields in YAML that are used create FanPWM objects.
>
> (I'm using Feb release in my sandbox, https://github.com/openbmc/docs/blob/master/release/release-notes.md#26-feb-4-2019)
>
> Thanks,
> Raj