Re: [PATCH 3/3] thermal/drivers/intel: Use generic trip points int340x

[Daniel Lezcano]

Hi Rui;

thanks for testing and your comments


On 13/01/2023 12:41, Zhang, Rui wrote:
> On Tue, 2023-01-10 at 16:17 +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 the ops content logic into generic trip points and register
> > them with the thermal zone.
> >
> > In order to consolidate the code, use the ACPI thermal framework API
> > to fill the generic trip point from the ACPI tables.
> >
> > It has been tested on a Intel i7-8650U - x280 with the INT3400, the
> > PCH, ACPITZ, and x86_pkg_temp. No regression observed so far.
> >
> > Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
> > ---
> >     V3:
> >        - The driver Kconfig option selects CONFIG_THERMAL_ACPI
> >        - Change the initialization to use GTSH for the hysteresis on
> >          all the trip points
> >
> > Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
> > ---
> >   drivers/thermal/intel/int340x_thermal/Kconfig |   1 +
> >   .../int340x_thermal/int340x_thermal_zone.c    | 177 ++++----------
> > ----

[ ... ]

> > -static int int340x_thermal_get_trip_hyst(struct thermal_zone_device
> > *zone,
> > -		int trip, int *temp)
> > -{
> > -	struct int34x_thermal_zone *d = zone->devdata;
> > -	acpi_status status;
> > -	unsigned long long hyst;
> > -
> > -	status = acpi_evaluate_integer(d->adev->handle, "GTSH", NULL,
> > &hyst);
> > -	if (ACPI_FAILURE(status))
> > -		*temp = 0;
> > -	else
> > -		*temp = hyst * 100;
>
> The previous code returns hyst * 100.
> But the new API retuurns hyst directly.
>
> -/sys/class/thermal/thermal_zone2/trip_point_4_hyst:2000
> +/sys/class/the
> rmal/thermal_zone2/trip_point_4_hyst:20
>
> Is this done on purpose?

No, it is an error. The function thermal_acpi_trip_gtsh() should do:

	return deci_kelvin_to_millicelsius(hyst);




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