diff options
author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-08-09 13:07:23 +0200 |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-08-17 11:25:22 +0200 |
commit | ec23c1c462ded022ec0c3ed3fa92af6ca25b9599 (patch) | |
tree | 5e074d6afef246558938668b614042550df34694 /drivers/acpi/thermal.c | |
parent | 96b8b4365db44af0a94b91a805cd5beed45d24fa (diff) | |
download | linux-ec23c1c462ded022ec0c3ed3fa92af6ca25b9599.tar.gz linux-ec23c1c462ded022ec0c3ed3fa92af6ca25b9599.tar.bz2 linux-ec23c1c462ded022ec0c3ed3fa92af6ca25b9599.zip |
ACPI: thermal: Use trip point table to register thermal zones
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>
Diffstat (limited to 'drivers/acpi/thermal.c')
-rw-r--r-- | drivers/acpi/thermal.c | 93 |
1 files changed, 86 insertions, 7 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index bfbbbbdc658c..c2fe806fd3d7 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -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; } |