Re: [RFC PATCH] platform/arm64: lenovo-thinkpad-t14s: Adjust thermal trip with platform profile

[Daniel Lezcano]

On 10/14/26 12:19, Ilpo Järvinen wrote:
> + more people.
>
> On Thu, 1 Oct 2026, Daniel Lezcano wrote:
>
> > Tie the keyboard thermal mitigation temperature to the platform profile
> > selected through the ThinkPad embedded controller.
> >
> > The EC reports Fn+L, Fn+M and Fn+H events corresponding to low-power,
> > balanced and performance operating modes. Use these events to update the
> > passive trip point of the "keyboard-thermal" zone to 49.85°C, 57.85°C
> > and 59.85°C respectively.
> >
> > These thresholds match the thermal mitigation temperatures used by the
> > platform for the corresponding operating profiles.
> >
> > Look up the keyboard thermal zone at probe time and locate the passive
> > trip named "keyboard-ec-alert". The trip name is used deliberately so
> > the EC driver can identify the device-tree trip associated with the
> > platform thermal profile without depending on its position in the trip
> > table.
> >
> > Initialize the thermal mitigation threshold to the balanced profile,
> > matching the default platform behaviour, and update the thermal zone
> > whenever a profile change event is reported by the EC so that the new
> > mitigation temperature takes effect immediately.
> >
> > Using the platform_profile API would provide a more appropriate interface
> > for exposing and managing these operating modes. However, while the API
> > itself is generic, the platform profile core implementation currently
> > lives under the ACPI framework. Making it available to device-tree based
> > platforms requires separating the generic infrastructure from ACPI,
> > which is a larger and independent piece of work.
>
> So the only problem is that platform profile resides underneath acpi
> namespace in sysfs?

Yes but I have a series I'm about to send decoupling the 
platform_profile from ACPI

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