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ACPI: thermal: Use trip point table to register thermal zones

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Make the ACPI thermal driver use thermal_zone_device_register_with_trips()
to register its thermal zones.

For this purpose, make it create a trip point table that will be passed to
thermal_zone_device_register_with_trips() as an argument.

Also use the thermal_zone_update_trip_temp() helper introduced
previously to update temperatures of the passive and active trip
points after a trip points change notification from the platform
firmware.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2023-08-09 13:07:23 +02:00
parent 96b8b4365d
commit ec23c1c462
1 changed files with 86 additions and 7 deletions
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93
drivers/acpi/thermal.c
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@ -125,6 +125,7 @@ struct acpi_thermal {
unsigned long polling_frequency;
volatile u8 zombie;
struct acpi_thermal_trips trips;
struct thermal_trip *trip_table;
struct acpi_handle_list devices;
struct thermal_zone_device *thermal_zone;
int kelvin_offset; /* in millidegrees */
@ -178,6 +179,15 @@ static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
return 0;
}
static int acpi_thermal_temp(struct acpi_thermal *tz, int temp_deci_k)
{
if (temp_deci_k == THERMAL_TEMP_INVALID)
return THERMAL_TEMP_INVALID;
return deci_kelvin_to_millicelsius_with_offset(temp_deci_k,
tz->kelvin_offset);
}
static void __acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
{
acpi_status status;
@ -389,10 +399,30 @@ static void __acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
}
}
static int acpi_thermal_adjust_trip(struct thermal_trip *trip, void *data)
{
struct acpi_thermal_trip *acpi_trip = trip->priv;
struct acpi_thermal *tz = data;
if (!acpi_trip)
return 0;
if (acpi_trip->valid)
trip->temperature = acpi_thermal_temp(tz, acpi_trip->temperature);
else
trip->temperature = THERMAL_TEMP_INVALID;
return 0;
}
static void acpi_thermal_adjust_thermal_zone(struct thermal_zone_device *thermal,
unsigned long data)
{
__acpi_thermal_trips_update(thermal_zone_device_priv(thermal), data);
struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
__acpi_thermal_trips_update(tz, data);
for_each_thermal_trip(tz->thermal_zone, acpi_thermal_adjust_trip, tz);
}
static void acpi_queue_thermal_check(struct acpi_thermal *tz)
@ -757,6 +787,8 @@ static void acpi_thermal_zone_sysfs_remove(struct acpi_thermal *tz)
static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
{
struct acpi_thermal_trip *acpi_trip;
struct thermal_trip *trip;
int passive_delay = 0;
int trip_count = 0;
int result;
@ -776,12 +808,56 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].trip.valid; i++)
trip_count++;
tz->thermal_zone = thermal_zone_device_register("acpitz", trip_count, 0,
tz, &acpi_thermal_zone_ops,
NULL, passive_delay,
tz->polling_frequency * 100);
if (IS_ERR(tz->thermal_zone))
return -ENODEV;
trip = kcalloc(trip_count, sizeof(*trip), GFP_KERNEL);
if (!trip)
return -ENOMEM;
tz->trip_table = trip;
if (tz->trips.critical.valid) {
trip->type = THERMAL_TRIP_CRITICAL;
trip->temperature = acpi_thermal_temp(tz, tz->trips.critical.temperature);
trip++;
}
if (tz->trips.hot.valid) {
trip->type = THERMAL_TRIP_HOT;
trip->temperature = acpi_thermal_temp(tz, tz->trips.hot.temperature);
trip++;
}
acpi_trip = &tz->trips.passive.trip;
if (acpi_trip->valid) {
trip->type = THERMAL_TRIP_PASSIVE;
trip->temperature = acpi_thermal_temp(tz, acpi_trip->temperature);
trip->priv = acpi_trip;
trip++;
}
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
acpi_trip = &tz->trips.active[i].trip;
if (!acpi_trip->valid)
break;
trip->type = THERMAL_TRIP_ACTIVE;
trip->temperature = acpi_thermal_temp(tz, acpi_trip->temperature);
trip->priv = acpi_trip;
trip++;
}
tz->thermal_zone = thermal_zone_device_register_with_trips("acpitz",
tz->trip_table,
trip_count,
0, tz,
&acpi_thermal_zone_ops,
NULL,
passive_delay,
tz->polling_frequency * 100);
if (IS_ERR(tz->thermal_zone)) {
result = PTR_ERR(tz->thermal_zone);
goto free_trip_table;
}
result = acpi_thermal_zone_sysfs_add(tz);
if (result)
@ -800,6 +876,8 @@ remove_links:
acpi_thermal_zone_sysfs_remove(tz);
unregister_tzd:
thermal_zone_device_unregister(tz->thermal_zone);
free_trip_table:
kfree(tz->trip_table);
return result;
}
@ -808,6 +886,7 @@ static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
{
acpi_thermal_zone_sysfs_remove(tz);
thermal_zone_device_unregister(tz->thermal_zone);
kfree(tz->trip_table);
tz->thermal_zone = NULL;
}