Re: [PATCH v2] thermal: sysfs: Make trip hysteresis writable along with trip temperature

[Rafael J. Wysocki]

On Thu, Feb 8, 2024 at 3:42 PM Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> wrote:
>
> On 31/01/2024 19:44, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> >
> > Trip point temperature can be modified via sysfs if
> > CONFIG_THERMAL_WRITABLE_TRIPS is enabled and the thermal
> > zone creator requested that the given trip be writable
> > in the writable trips mask passed to the registration
> > function.
> >
> > However, trip point hysteresis is treated differently - it is only
> > writable if the thermal zone has a .set_trip_hyst() operation defined
> > and neither CONFIG_THERMAL_WRITABLE_TRIPS, nor the writable trips mask
> > supplied by the zone creator has any bearing on this.  That is
> > inconsistent and confusing, and it generally does not meet user
> > expectations.
> >
> > For this reason, modify create_trip_attrs() to handle trip point
> > hysteresis in the same way as trip point temperature, so they both
> > are writable at the same time regardless of what trip point operations
> > are defined for the thermal zone.
> >
> > Link: https://lore.kernel.org/linux-pm/20240106191502.29126-1-quic_manafm@xxxxxxxxxxx
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> > ---
>
> Acked-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>

Thanks, but I need to withdraw this one, because there are drivers
that actively don't want their trip points' hysteresis to be adjusted
via sysfs, so I'm now working on a patch series that will tackle this
in a more systematic way.