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ACPI: thermal: Add Thermal fast Sampling Period (_TFP) support

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Add support of "Thermal fast Sampling Period (_TFP)" for passive
cooling.

As per the ACPI specification (ACPI 6.5, Section 11.4.17 "_TFP (Thermal
fast Sampling Period)", _TFP overrides _TSP ("Thermal Sampling Period"
if both are present in a Thermal zone.

Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
Co-developed-by: Sumit Gupta <sumitg@nvidia.com>
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jeff Brasen 2023-11-10 00:03:21 +05:30 committed by Rafael J. Wysocki
parent 9c8647224e
commit a2ee7581af
1 changed files with 9 additions and 3 deletions
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12
drivers/acpi/thermal.c
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@ -92,7 +92,7 @@ struct acpi_thermal_passive {
struct acpi_thermal_trip trip;
unsigned long tc1;
unsigned long tc2;
unsigned long tsp;
unsigned long delay;
};
struct acpi_thermal_active {
@ -396,11 +396,17 @@ static bool passive_trip_params_init(struct acpi_thermal *tz)
tz->trips.passive.tc2 = tmp;
status = acpi_evaluate_integer(tz->device->handle, "_TFP", NULL, &tmp);
if (ACPI_SUCCESS(status)) {
tz->trips.passive.delay = tmp;
return true;
}
status = acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, &tmp);
if (ACPI_FAILURE(status))
return false;
tz->trips.passive.tsp = tmp;
tz->trips.passive.delay = tmp * 100;
return true;
}
@ -896,7 +902,7 @@ static int acpi_thermal_add(struct acpi_device *device)
acpi_trip = &tz->trips.passive.trip;
if (acpi_thermal_trip_valid(acpi_trip)) {
passive_delay = tz->trips.passive.tsp * 100;
passive_delay = tz->trips.passive.delay;
trip->type = THERMAL_TRIP_PASSIVE;
trip->temperature = acpi_thermal_temp(tz, acpi_trip->temp_dk);