From: Jeff Brasen <jbrasen@xxxxxxxxxx>
Add support of "Thermal fast Sampling Period (_TFP)" for Passive cooling.
As per [1], _TFP overrides the "Thermal Sampling Period (_TSP)" if both
are present in a Thermal zone.
[1] ACPI Specification 6.4 - section 11.4.17. _TFP (Thermal fast Sampling
Period)"
Signed-off-by: Jeff Brasen <jbrasen@xxxxxxxxxx>
Co-developed-by: Sumit Gupta <sumitg@xxxxxxxxxx>
Signed-off-by: Sumit Gupta <sumitg@xxxxxxxxxx>
---
drivers/acpi/thermal.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index f74d81abdbfc..3b75eb2260d7 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -90,7 +90,7 @@ 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 {
@@ -404,11 +404,17 @@ 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;
}
@@ -904,7 +910,7 @@ 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);
--
2.17.1
