Re: [PATCH 2/3] thermal/drivers/intel: Use generic trip points for processor_thermal_device_pci

[Daniel Lezcano]

Hi Srinivas,


On 18/01/2023 20:09, srinivas pandruvada wrote:
> On Wed, 2023-01-18 at 19:16 +0100, Daniel Lezcano wrote:
> > The thermal framework gives the possibility to register the trip
> > points with the thermal zone. When that is done, no get_trip_* ops
> > are
> > needed and they can be removed.
> >
> > Convert ops content logic into generic trip points and register them
> > with the
> > thermal zone.
> In this scheme is the assumption is that trip point temperature never
> changes? If firmware updated the trip temperature, what needs to be
> done?

I'm a bit confused about the situation where the firmware can change the 
trip point in the back of the OSPM.

Does the firmware send a notification about the trip change? Or does it 
assume the OSPM will be reading the trip point while monitoring/polling 
the thermal zone ?

Is the question for this particular driver?

If the trip point is changed by the userspace (via sysfs), 
thermal_zone_set_trip() is used which in turn changes the thermal trip 
temperature directly in the generic structure and then calls the back 
set_trip_temp.


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