[PATCH v1] thermal: imx: Make trip point offset configurable

[Francesco Dolcini]

On Wed, May 18, 2022 at 12:10:34PM +0200, Daniel Lezcano wrote:
> On 18/05/2022 11:49, Francesco Dolcini wrote:
> > On Wed, May 18, 2022 at 10:55:22AM +0200, Marco Felsch wrote:
> > > On 22-05-16, Francesco Dolcini wrote:
> > > > Currently the imx thermal driver has a hardcoded critical temperature
> > > > value offset of 5 Celsius degrees from the actual SoC maximum
> > > > temperature.
> > > > 
> > > > This affects applications and systems designed to be working on this close
> > > > to the limit, but yet valid, temperature range.
> > > > 
> > > > Given that there is no single value that will fit all the use cases make
> > > > the critical trip point offset from the max temperature configurable
> > > > using a newly added trip_offset module parameter, passive trip point is
> > > > set to 5 Celsius degrees less than the critical. By default the
> > > > system behaves exactly as before.
> > > 
> > > I thought the conclusion of the discussion was to use a dt-property?
> > > Since it is device and/or environment specific.
> > 
> > Daniel proposed to use a module parameter [0], but if you prefer a
> > dt-property I can change this. I would keep the same semantic (offset
> > from max temperature to compute the critical trip point).
> > 
> > [0] https://lore.kernel.org/all/7f5a919c-2fa1-a463-1f6b-6b531d5ee27d@linaro.org/
> 
> 
> It would have been easier if the imx6/7 platforms were defining the thermal
> zones in their DT ...

Marco, Lucas,
What about a &tempon { fsl,tempmon-critical-offset=<0>; } dt property?
>From my point of view this is even a better solution.

Daniel, would something like that also acceptable from your point of
view?

Francesco