Merge tag 'thermal-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull thermal control updates from Rafael Wysocki:
 "These further rework the ACPI thermal driver, after the changes made
  to it in the previous cycle, to make it easier to grasp, get rid of
  redundant pieces of internal data structures and eliminate its
  reliance on a specific ordering of trip point objects in the thermal
  core, make thermal core adjustments needed for the ACPI thermal driver
  rework, modify the thermal governor interface so as to use trip
  pointers for representing trip points in it, switch over multiple
  thermal drivers to using void platform driver remove callbacks, add
  support for 2 hardware features to the Intel int340x thermal driver,
  add support for new hardware on ARM platforms, update documentation,
  fix problems, clean up code and update the MAINTAINERS record for
  thermal control.

  Specifics:

   - Untangle the initialization and updates of passive and active trip
     points in the ACPI thermal driver (Rafael Wysocki)

   - Reduce code duplication related to the initialization and updates
     of trip points in the ACPI thermal driver (Rafael Wysocki)

   - Use trip pointers for cooling device binding in the ACPI thermal
     driver (Rafael Wysocki)

   - Simplify critical and hot trips representation in the ACPI thermal
     driver (Rafael Wysocki)

   - Use trip pointers in thermal governors and in the related part of
     the thermal core (Rafael Wysocki)

   - Drop the trips_disabled bitmask that has become redundant from the
     thermal core (Rafael Wysocki)

   - Avoid updating trip points when the thermal zone temperature falls
     into a trip point's hysteresis range (ícolas F. R. A. Prado)

   - Add power floor notifications support to the int340x thermal
     control driver (Srinivas Pandruvada)

   - Rework updating trip points in the int340x thermal driver so that
     it does not access thermal zone internals directly (Rafael
     Wysocki)

   - Use param_get_byte() instead of param_get_int() as the max_idle
     module parameter .get() callback in the Intel powerclamp thermal
     driver to avoid possible out-of-bounds access (David Arcari)

   - Add workload hints support to the int340x thermal driver (Srinivas
     Pandruvada)

   - Add support for Mediatek LVTS MT8192 along with suspend/resume
     routines (Balsam Chihi)

   - Fix probe for THERMAL_V2 in the Mediatek LVTS driver (Markus
     Schneider-Pargmann)

   - Remove duplicate error message from the max76620 driver when
     thermal_of_zone_register() fails (Thierry Reding)

   - Add i.MX7D compatible bindings to fix a warning from dtbs_check for
     the imx6ul platform (Alexander Stein)

   - Add sa8775p compatible to the QCom tsens driver (Priyansh Jain)

   - Fix error check in lvts_debugfs_init() to be against PTR_ERR() in
     the LVTS Mediatek driver (Minjie Du)

   - Remove unused variable in thermal/tools (Kuan-Wei Chiu)

   - Document the imx8dl thermal sensor (Fabio Estevam)

   - Add variable names in callback prototypes to prevent warning from
     checkpatch.pl in the imx8mm driver (Bragatheswaran Manickavel)

   - Add missing unevaluatedProperties on child node schemas for
     tegra124 (Rob Herring)

   - Add mt7988 support to the Mediatek LVTS driver (Frank Wunderlich)"

* tag 'thermal-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (111 commits)
  thermal: ACPI: Include the right header file
  thermal: core: Don't update trip points inside the hysteresis range
  thermal: core: Pass trip pointer to governor throttle callback
  thermal: gov_step_wise: Fold update_passive_instance() into its caller
  thermal: gov_power_allocator: Use trip pointers instead of trip indices
  thermal: gov_fair_share: Rearrange get_trip_level()
  thermal: trip: Define for_each_trip() macro
  thermal: trip: Simplify computing trip indices
  thermal/qcom/tsens: Drop ops_v0_1
  thermal/drivers/mediatek/lvts_thermal: Update calibration data documentation
  thermal/drivers/mediatek/lvts_thermal: Add mt8192 support
  thermal/drivers/mediatek/lvts_thermal: Add suspend and resume
  dt-bindings: thermal: mediatek: Add LVTS thermal controller definition for mt8192
  thermal/drivers/mediatek: Fix probe for THERMAL_V2
  thermal/drivers/max77620: Remove duplicate error message
  dt-bindings: timer: add imx7d compatible
  dt-bindings: net: microchip: Allow nvmem-cell usage
  dt-bindings: imx-thermal: Add #thermal-sensor-cells property
  dt-bindings: thermal: tsens: Add sa8775p compatible
  thermal/drivers/mediatek/lvts_thermal: Fix error check in lvts_debugfs_init()
  ...

1 files changed, 409 insertions, 432 deletions

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 312730f8272ee..fb9da37a79d85 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -43,17 +43,7 @@
 #define ACPI_THERMAL_MAX_ACTIVE		10
 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN	65
 
-#define ACPI_TRIPS_CRITICAL	BIT(0)
-#define ACPI_TRIPS_HOT		BIT(1)
-#define ACPI_TRIPS_PASSIVE	BIT(2)
-#define ACPI_TRIPS_ACTIVE	BIT(3)
-#define ACPI_TRIPS_DEVICES	BIT(4)
-
-#define ACPI_TRIPS_THRESHOLDS	(ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
-
-#define ACPI_TRIPS_INIT		(ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
-				 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
-				 ACPI_TRIPS_DEVICES)
+#define ACPI_THERMAL_TRIP_PASSIVE	(-1)
 
 /*
  * This exception is thrown out in two cases:
@@ -62,12 +52,11 @@
  * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
  *   We need to re-bind the cooling devices of a thermal zone when this occurs.
  */
-#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, tz, str) \
+#define ACPI_THERMAL_TRIPS_EXCEPTION(tz, str) \
 do { \
-	if (flags != ACPI_TRIPS_INIT) \
-		acpi_handle_info(tz->device->handle, \
-			"ACPI thermal trip point %s changed\n" \
-			"Please report to linux-acpi@vger.kernel.org\n", str); \
+	acpi_handle_info(tz->device->handle, \
+			 "ACPI thermal trip point %s changed\n" \
+			 "Please report to linux-acpi@vger.kernel.org\n", str); \
 } while (0)
 
 static int act;
@@ -93,13 +82,12 @@ MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
 static struct workqueue_struct *acpi_thermal_pm_queue;
 
 struct acpi_thermal_trip {
-	unsigned long temperature;
-	bool valid;
+	unsigned long temp_dk;
+	struct acpi_handle_list devices;
 };
 
 struct acpi_thermal_passive {
 	struct acpi_thermal_trip trip;
-	struct acpi_handle_list devices;
 	unsigned long tc1;
 	unsigned long tc2;
 	unsigned long tsp;
@@ -107,12 +95,9 @@ struct acpi_thermal_passive {
 
 struct acpi_thermal_active {
 	struct acpi_thermal_trip trip;
-	struct acpi_handle_list devices;
 };
 
 struct acpi_thermal_trips {
-	struct acpi_thermal_trip critical;
-	struct acpi_thermal_trip hot;
 	struct acpi_thermal_passive passive;
 	struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
 };
@@ -120,13 +105,12 @@ struct acpi_thermal_trips {
 struct acpi_thermal {
 	struct acpi_device *device;
 	acpi_bus_id name;
-	unsigned long temperature;
-	unsigned long last_temperature;
+	unsigned long temp_dk;
+	unsigned long last_temp_dk;
 	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 */
 	struct work_struct thermal_check_work;
@@ -146,16 +130,16 @@ static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
 	if (!tz)
 		return -EINVAL;
 
-	tz->last_temperature = tz->temperature;
+	tz->last_temp_dk = tz->temp_dk;
 
 	status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;
 
-	tz->temperature = tmp;
+	tz->temp_dk = tmp;
 
 	acpi_handle_debug(tz->device->handle, "Temperature is %lu dK\n",
-			  tz->temperature);
+			  tz->temp_dk);
 
 	return 0;
 }
@@ -188,245 +172,145 @@ static int acpi_thermal_temp(struct acpi_thermal *tz, int temp_deci_k)
 						       tz->kelvin_offset);
 }
 
-static void __acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
+static bool acpi_thermal_trip_valid(struct acpi_thermal_trip *acpi_trip)
 {
+	return acpi_trip->temp_dk != THERMAL_TEMP_INVALID;
+}
+
+static int active_trip_index(struct acpi_thermal *tz,
+			     struct acpi_thermal_trip *acpi_trip)
+{
+	struct acpi_thermal_active *active;
+
+	active = container_of(acpi_trip, struct acpi_thermal_active, trip);
+	return active - tz->trips.active;
+}
+
+static long get_passive_temp(struct acpi_thermal *tz)
+{
+	unsigned long long tmp;
 	acpi_status status;
+
+	status = acpi_evaluate_integer(tz->device->handle, "_PSV", NULL, &tmp);
+	if (ACPI_FAILURE(status))
+		return THERMAL_TEMP_INVALID;
+
+	return tmp;
+}
+
+static long get_active_temp(struct acpi_thermal *tz, int index)
+{
+	char method[] = { '_', 'A', 'C', '0' + index, '\0' };
 	unsigned long long tmp;
-	struct acpi_handle_list devices;
-	bool valid = false;
-	int i;
+	acpi_status status;
 
-	/* Critical Shutdown */
-	if (flag & ACPI_TRIPS_CRITICAL) {
-		status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, &tmp);
-		tz->trips.critical.temperature = tmp;
-		/*
-		 * Treat freezing temperatures as invalid as well; some
-		 * BIOSes return really low values and cause reboots at startup.
-		 * Below zero (Celsius) values clearly aren't right for sure..
-		 * ... so lets discard those as invalid.
-		 */
-		if (ACPI_FAILURE(status)) {
-			tz->trips.critical.valid = false;
-			acpi_handle_debug(tz->device->handle,
-					  "No critical threshold\n");
-		} else if (tmp <= 2732) {
-			pr_info(FW_BUG "Invalid critical threshold (%llu)\n", tmp);
-			tz->trips.critical.valid = false;
-		} else {
-			tz->trips.critical.valid = true;
-			acpi_handle_debug(tz->device->handle,
-					  "Found critical threshold [%lu]\n",
-					  tz->trips.critical.temperature);
-		}
-		if (tz->trips.critical.valid) {
-			if (crt == -1) {
-				tz->trips.critical.valid = false;
-			} else if (crt > 0) {
-				unsigned long crt_k = celsius_to_deci_kelvin(crt);
-
-				/*
-				 * Allow override critical threshold
-				 */
-				if (crt_k > tz->trips.critical.temperature)
-					pr_info("Critical threshold %d C\n", crt);
-
-				tz->trips.critical.temperature = crt_k;
-			}
-		}
-	}
+	status = acpi_evaluate_integer(tz->device->handle, method, NULL, &tmp);
+	if (ACPI_FAILURE(status))
+		return THERMAL_TEMP_INVALID;
 
-	/* Critical Sleep (optional) */
-	if (flag & ACPI_TRIPS_HOT) {
-		status = acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, &tmp);
-		if (ACPI_FAILURE(status)) {
-			tz->trips.hot.valid = false;
-			acpi_handle_debug(tz->device->handle,
-					  "No hot threshold\n");
-		} else {
-			tz->trips.hot.temperature = tmp;
-			tz->trips.hot.valid = true;
-			acpi_handle_debug(tz->device->handle,
-					  "Found hot threshold [%lu]\n",
-					  tz->trips.hot.temperature);
-		}
+	/*
+	 * If an override has been provided, apply it so there are no active
+	 * trips with thresholds greater than the override.
+	 */
+	if (act > 0) {
+		unsigned long long override = celsius_to_deci_kelvin(act);
+
+		if (tmp > override)
+			tmp = override;
 	}
+	return tmp;
+}
 
-	/* Passive (optional) */
-	if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.trip.valid) ||
-	    flag == ACPI_TRIPS_INIT) {
-		valid = tz->trips.passive.trip.valid;
-		if (psv == -1) {
-			status = AE_SUPPORT;
-		} else if (psv > 0) {
-			tmp = celsius_to_deci_kelvin(psv);
-			status = AE_OK;
-		} else {
-			status = acpi_evaluate_integer(tz->device->handle,
-						       "_PSV", NULL, &tmp);
-		}
+static void acpi_thermal_update_trip(struct acpi_thermal *tz,
+				     const struct thermal_trip *trip)
+{
+	struct acpi_thermal_trip *acpi_trip = trip->priv;
 
-		if (ACPI_FAILURE(status)) {
-			tz->trips.passive.trip.valid = false;
-		} else {
-			tz->trips.passive.trip.temperature = tmp;
-			tz->trips.passive.trip.valid = true;
-			if (flag == ACPI_TRIPS_INIT) {
-				status = acpi_evaluate_integer(tz->device->handle,
-							       "_TC1", NULL, &tmp);
-				if (ACPI_FAILURE(status))
-					tz->trips.passive.trip.valid = false;
-				else
-					tz->trips.passive.tc1 = tmp;
-
-				status = acpi_evaluate_integer(tz->device->handle,
-							       "_TC2", NULL, &tmp);
-				if (ACPI_FAILURE(status))
-					tz->trips.passive.trip.valid = false;
-				else
-					tz->trips.passive.tc2 = tmp;
-
-				status = acpi_evaluate_integer(tz->device->handle,
-							       "_TSP", NULL, &tmp);
-				if (ACPI_FAILURE(status))
-					tz->trips.passive.trip.valid = false;
-				else
-					tz->trips.passive.tsp = tmp;
-			}
-		}
+	if (trip->type == THERMAL_TRIP_PASSIVE) {
+		if (psv > 0)
+			return;
+
+		acpi_trip->temp_dk = get_passive_temp(tz);
+	} else {
+		int index = active_trip_index(tz, acpi_trip);
+
+		acpi_trip->temp_dk = get_active_temp(tz, index);
 	}
-	if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.trip.valid) {
-		memset(&devices, 0, sizeof(struct acpi_handle_list));
-		status = acpi_evaluate_reference(tz->device->handle, "_PSL",
-						 NULL, &devices);
-		if (ACPI_FAILURE(status)) {
-			acpi_handle_info(tz->device->handle,
-					 "Invalid passive threshold\n");
-			tz->trips.passive.trip.valid = false;
-		} else {
-			tz->trips.passive.trip.valid = true;
-		}
 
-		if (memcmp(&tz->trips.passive.devices, &devices,
-			   sizeof(struct acpi_handle_list))) {
-			memcpy(&tz->trips.passive.devices, &devices,
-			       sizeof(struct acpi_handle_list));
-			ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device");
-		}
+	if (!acpi_thermal_trip_valid(acpi_trip))
+		ACPI_THERMAL_TRIPS_EXCEPTION(tz, "state");
+}
+
+static bool update_trip_devices(struct acpi_thermal *tz,
+				struct acpi_thermal_trip *acpi_trip,
+				int index, bool compare)
+{
+	struct acpi_handle_list devices;
+	char method[] = "_PSL";
+	acpi_status status;
+
+	if (index != ACPI_THERMAL_TRIP_PASSIVE) {
+		method[1] = 'A';
+		method[2] = 'L';
+		method[3] = '0' + index;
 	}
-	if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
-		if (valid != tz->trips.passive.trip.valid)
-			ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state");
+
+	memset(&devices, 0, sizeof(devices));
+
+	status = acpi_evaluate_reference(tz->device->handle, method, NULL, &devices);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_info(tz->device->handle, "%s evaluation failure\n", method);
+		return false;
 	}
 
-	/* Active (optional) */
-	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
-		char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
-		valid = tz->trips.active[i].trip.valid;
+	if (compare && memcmp(&acpi_trip->devices, &devices, sizeof(devices)))
+		ACPI_THERMAL_TRIPS_EXCEPTION(tz, "device");
 
-		if (act == -1)
-			break; /* disable all active trip points */
-
-		if (flag == ACPI_TRIPS_INIT || ((flag & ACPI_TRIPS_ACTIVE) &&
-		    tz->trips.active[i].trip.valid)) {
-			status = acpi_evaluate_integer(tz->device->handle,
-						       name, NULL, &tmp);
-			if (ACPI_FAILURE(status)) {
-				tz->trips.active[i].trip.valid = false;
-				if (i == 0)
-					break;
-
-				if (act <= 0)
-					break;
-
-				if (i == 1)
-					tz->trips.active[0].trip.temperature =
-							celsius_to_deci_kelvin(act);
-				else
-					/*
-					 * Don't allow override higher than
-					 * the next higher trip point
-					 */
-					tz->trips.active[i-1].trip.temperature =
-						min_t(unsigned long,
-						      tz->trips.active[i-2].trip.temperature,
-						      celsius_to_deci_kelvin(act));
-
-				break;
-			} else {
-				tz->trips.active[i].trip.temperature = tmp;
-				tz->trips.active[i].trip.valid = true;
-			}
-		}
+	memcpy(&acpi_trip->devices, &devices, sizeof(devices));
+	return true;
+}
 
-		name[2] = 'L';
-		if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].trip.valid) {
-			memset(&devices, 0, sizeof(struct acpi_handle_list));
-			status = acpi_evaluate_reference(tz->device->handle,
-							 name, NULL, &devices);
-			if (ACPI_FAILURE(status)) {
-				acpi_handle_info(tz->device->handle,
-						 "Invalid active%d threshold\n", i);
-				tz->trips.active[i].trip.valid = false;
-			} else {
-				tz->trips.active[i].trip.valid = true;
-			}
-
-			if (memcmp(&tz->trips.active[i].devices, &devices,
-				   sizeof(struct acpi_handle_list))) {
-				memcpy(&tz->trips.active[i].devices, &devices,
-				       sizeof(struct acpi_handle_list));
-				ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device");
-			}
-		}
-		if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
-			if (valid != tz->trips.active[i].trip.valid)
-				ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state");
+static void acpi_thermal_update_trip_devices(struct acpi_thermal *tz,
+					     const struct thermal_trip *trip)
+{
+	struct acpi_thermal_trip *acpi_trip = trip->priv;
+	int index = trip->type == THERMAL_TRIP_PASSIVE ?
+			ACPI_THERMAL_TRIP_PASSIVE : active_trip_index(tz, acpi_trip);
 
-		if (!tz->trips.active[i].trip.valid)
-			break;
-	}
+	if (update_trip_devices(tz, acpi_trip, index, true))
+		return;
 
-	if (flag & ACPI_TRIPS_DEVICES) {
-		memset(&devices, 0, sizeof(devices));
-		status = acpi_evaluate_reference(tz->device->handle, "_TZD",
-						 NULL, &devices);
-		if (ACPI_SUCCESS(status) &&
-		    memcmp(&tz->devices, &devices, sizeof(devices))) {
-			tz->devices = devices;
-			ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device");
-		}
-	}
+	acpi_trip->temp_dk = THERMAL_TEMP_INVALID;
+	ACPI_THERMAL_TRIPS_EXCEPTION(tz, "state");
 }
 
+struct adjust_trip_data {
+	struct acpi_thermal *tz;
+	u32 event;
+};
+
 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;
+	struct adjust_trip_data *atd = data;
+	struct acpi_thermal *tz = atd->tz;
 
-	if (!acpi_trip)
+	if (!acpi_trip || !acpi_thermal_trip_valid(acpi_trip))
 		return 0;
 
-	if (acpi_trip->valid)
-		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temperature);
+	if (atd->event == ACPI_THERMAL_NOTIFY_THRESHOLDS)
+		acpi_thermal_update_trip(tz, trip);
+	else
+		acpi_thermal_update_trip_devices(tz, trip);
+
+	if (acpi_thermal_trip_valid(acpi_trip))
+		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temp_dk);
 	else
 		trip->temperature = THERMAL_TEMP_INVALID;
 
 	return 0;
 }
 
-static void acpi_thermal_adjust_thermal_zone(struct thermal_zone_device *thermal,
-					     unsigned long data)
-{
-	struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
-	int flag = data == ACPI_THERMAL_NOTIFY_THRESHOLDS ?
-				ACPI_TRIPS_THRESHOLDS : ACPI_TRIPS_DEVICES;
-
-	__acpi_thermal_trips_update(tz, flag);
-
-	for_each_thermal_trip(tz->thermal_zone, acpi_thermal_adjust_trip, tz);
-}
-
 static void acpi_queue_thermal_check(struct acpi_thermal *tz)
 {
 	if (!work_pending(&tz->thermal_check_work))
@@ -435,41 +319,156 @@ static void acpi_queue_thermal_check(struct acpi_thermal *tz)
 
 static void acpi_thermal_trips_update(struct acpi_thermal *tz, u32 event)
 {
+	struct adjust_trip_data atd = { .tz = tz, .event = event };
 	struct acpi_device *adev = tz->device;
 
 	/*
-	 * Use thermal_zone_device_exec() to carry out the trip points
+	 * Use thermal_zone_for_each_trip() to carry out the trip points
 	 * update, so as to protect thermal_get_trend() from getting stale
 	 * trip point temperatures and to prevent thermal_zone_device_update()
 	 * invoked from acpi_thermal_check_fn() from producing inconsistent
 	 * results.
 	 */
-	thermal_zone_device_exec(tz->thermal_zone,
-				 acpi_thermal_adjust_thermal_zone, event);
+	thermal_zone_for_each_trip(tz->thermal_zone,
+				   acpi_thermal_adjust_trip, &atd);
 	acpi_queue_thermal_check(tz);
 	acpi_bus_generate_netlink_event(adev->pnp.device_class,
 					dev_name(&adev->dev), event, 0);
 }
 
+static long acpi_thermal_get_critical_trip(struct acpi_thermal *tz)
+{
+	unsigned long long tmp;
+	acpi_status status;
+
+	if (crt > 0) {
+		tmp = celsius_to_deci_kelvin(crt);
+		goto set;
+	}
+	if (crt == -1) {
+		acpi_handle_debug(tz->device->handle, "Critical threshold disabled\n");
+		return THERMAL_TEMP_INVALID;
+	}
+
+	status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, &tmp);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_debug(tz->device->handle, "No critical threshold\n");
+		return THERMAL_TEMP_INVALID;
+	}
+	if (tmp <= 2732) {
+		/*
+		 * Below zero (Celsius) values clearly aren't right for sure,
+		 * so discard them as invalid.
+		 */
+		pr_info(FW_BUG "Invalid critical threshold (%llu)\n", tmp);
+		return THERMAL_TEMP_INVALID;
+	}
+
+set:
+	acpi_handle_debug(tz->device->handle, "Critical threshold [%llu]\n", tmp);
+	return tmp;
+}
+
+static long acpi_thermal_get_hot_trip(struct acpi_thermal *tz)
+{
+	unsigned long long tmp;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, &tmp);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_debug(tz->device->handle, "No hot threshold\n");
+		return THERMAL_TEMP_INVALID;
+	}
+
+	acpi_handle_debug(tz->device->handle, "Hot threshold [%llu]\n", tmp);
+	return tmp;
+}
+
+static bool passive_trip_params_init(struct acpi_thermal *tz)
+{
+	unsigned long long tmp;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(tz->device->handle, "_TC1", NULL, &tmp);
+	if (ACPI_FAILURE(status))
+		return false;
+
+	tz->trips.passive.tc1 = tmp;
+
+	status = acpi_evaluate_integer(tz->device->handle, "_TC2", NULL, &tmp);
+	if (ACPI_FAILURE(status))
+		return false;
+
+	tz->trips.passive.tc2 = tmp;
+
+	status = acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, &tmp);
+	if (ACPI_FAILURE(status))
+		return false;
+
+	tz->trips.passive.tsp = tmp;
+
+	return true;
+}
+
+static bool acpi_thermal_init_trip(struct acpi_thermal *tz, int index)
+{
+	struct acpi_thermal_trip *acpi_trip;
+	long temp;
+
+	if (index == ACPI_THERMAL_TRIP_PASSIVE) {
+		acpi_trip = &tz->trips.passive.trip;
+
+		if (psv == -1)
+			goto fail;
+
+		if (!passive_trip_params_init(tz))
+			goto fail;
+
+		temp = psv > 0 ? celsius_to_deci_kelvin(psv) :
+				 get_passive_temp(tz);
+	} else {
+		acpi_trip = &tz->trips.active[index].trip;
+
+		if (act == -1)
+			goto fail;
+
+		temp = get_active_temp(tz, index);
+	}
+
+	if (temp == THERMAL_TEMP_INVALID)
+		goto fail;
+
+	if (!update_trip_devices(tz, acpi_trip, index, false))
+		goto fail;
+
+	acpi_trip->temp_dk = temp;
+	return true;
+
+fail:
+	acpi_trip->temp_dk = THERMAL_TEMP_INVALID;
+	return false;
+}
+
 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
 {
-	bool valid;
+	unsigned int count = 0;
 	int i;
 
-	__acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
-
-	valid = tz->trips.critical.valid |
-		tz->trips.hot.valid |
-		tz->trips.passive.trip.valid;
+	if (acpi_thermal_init_trip(tz, ACPI_THERMAL_TRIP_PASSIVE))
+		count++;
 
-	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
-		valid = valid || tz->trips.active[i].trip.valid;
+	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+		if (acpi_thermal_init_trip(tz, i))
+			count++;
+		else
+			break;
 
-	if (!valid) {
-		pr_warn(FW_BUG "No valid trip found\n");
-		return -ENODEV;
 	}
-	return 0;
+
+	while (++i < ACPI_THERMAL_MAX_ACTIVE)
+		tz->trips.active[i].trip.temp_dk = THERMAL_TEMP_INVALID;
+
+	return count;
 }
 
 /* sys I/F for generic thermal sysfs support */
@@ -486,7 +485,7 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp)
 	if (result)
 		return result;
 
-	*temp = deci_kelvin_to_millicelsius_with_offset(tz->temperature,
+	*temp = deci_kelvin_to_millicelsius_with_offset(tz->temp_dk,
 							tz->kelvin_offset);
 	return 0;
 }
@@ -503,15 +502,15 @@ static int thermal_get_trend(struct thermal_zone_device *thermal,
 		return -EINVAL;
 
 	acpi_trip = trip->priv;
-	if (!acpi_trip || !acpi_trip->valid)
+	if (!acpi_trip || !acpi_thermal_trip_valid(acpi_trip))
 		return -EINVAL;
 
 	switch (trip->type) {
 	case THERMAL_TRIP_PASSIVE:
-		t = tz->trips.passive.tc1 * (tz->temperature -
-						tz->last_temperature) +
-			tz->trips.passive.tc2 * (tz->temperature -
-						acpi_trip->temperature);
+		t = tz->trips.passive.tc1 * (tz->temp_dk -
+						tz->last_temp_dk) +
+			tz->trips.passive.tc2 * (tz->temp_dk -
+						acpi_trip->temp_dk);
 		if (t > 0)
 			*trend = THERMAL_TREND_RAISING;
 		else if (t < 0)
@@ -522,7 +521,7 @@ static int thermal_get_trend(struct thermal_zone_device *thermal,
 		return 0;
 
 	case THERMAL_TRIP_ACTIVE:
-		t = acpi_thermal_temp(tz, tz->temperature);
+		t = acpi_thermal_temp(tz, tz->temp_dk);
 		if (t <= trip->temperature)
 			break;
 
@@ -557,91 +556,72 @@ static void acpi_thermal_zone_device_critical(struct thermal_zone_device *therma
 	thermal_zone_device_critical(thermal);
 }
 
-static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
-					  struct thermal_cooling_device *cdev,
-					  bool bind)
+struct acpi_thermal_bind_data {
+	struct thermal_zone_device *thermal;
+	struct thermal_cooling_device *cdev;
+	bool bind;
+};
+
+static int bind_unbind_cdev_cb(struct thermal_trip *trip, void *arg)
 {
-	struct acpi_device *device = cdev->devdata;
-	struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
-	struct acpi_device *dev;
-	acpi_handle handle;
+	struct acpi_thermal_trip *acpi_trip = trip->priv;
+	struct acpi_thermal_bind_data *bd = arg;
+	struct thermal_zone_device *thermal = bd->thermal;
+	struct thermal_cooling_device *cdev = bd->cdev;
+	struct acpi_device *cdev_adev = cdev->devdata;
 	int i;
-	int j;
-	int trip = -1;
-	int result = 0;
 
-	if (tz->trips.critical.valid)
-		trip++;
+	/* Skip critical and hot trips. */
+	if (!acpi_trip)
+		return 0;
 
-	if (tz->trips.hot.valid)
-		trip++;
+	for (i = 0; i < acpi_trip->devices.count; i++) {
+		acpi_handle handle = acpi_trip->devices.handles[i];
+		struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
 
-	if (tz->trips.passive.trip.valid) {
-		trip++;
-		for (i = 0; i < tz->trips.passive.devices.count; i++) {
-			handle = tz->trips.passive.devices.handles[i];
-			dev = acpi_fetch_acpi_dev(handle);
-			if (dev != device)
-				continue;
-
-			if (bind)
-				result = thermal_zone_bind_cooling_device(
-						thermal, trip, cdev,
-						THERMAL_NO_LIMIT,
-						THERMAL_NO_LIMIT,
-						THERMAL_WEIGHT_DEFAULT);
-			else
-				result =
-					thermal_zone_unbind_cooling_device(
-						thermal, trip, cdev);
-
-			if (result)
-				goto failed;
-		}
-	}
+		if (adev != cdev_adev)
+			continue;
 
-	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
-		if (!tz->trips.active[i].trip.valid)
-			break;
+		if (bd->bind) {
+			int ret;
 
-		trip++;
-		for (j = 0; j < tz->trips.active[i].devices.count; j++) {
-			handle = tz->trips.active[i].devices.handles[j];
-			dev = acpi_fetch_acpi_dev(handle);
-			if (dev != device)
-				continue;
-
-			if (bind)
-				result = thermal_zone_bind_cooling_device(
-						thermal, trip, cdev,
-						THERMAL_NO_LIMIT,
-						THERMAL_NO_LIMIT,
-						THERMAL_WEIGHT_DEFAULT);
-			else
-				result = thermal_zone_unbind_cooling_device(
-						thermal, trip, cdev);
-
-			if (result)
-				goto failed;
+			ret = thermal_bind_cdev_to_trip(thermal, trip, cdev,
+							THERMAL_NO_LIMIT,
+							THERMAL_NO_LIMIT,
+							THERMAL_WEIGHT_DEFAULT);
+			if (ret)
+				return ret;
+		} else {
+			thermal_unbind_cdev_from_trip(thermal, trip, cdev);
 		}
 	}
 
-failed:
-	return result;
+	return 0;
+}
+
+static int acpi_thermal_bind_unbind_cdev(struct thermal_zone_device *thermal,
+					 struct thermal_cooling_device *cdev,
+					 bool bind)
+{
+	struct acpi_thermal_bind_data bd = {
+		.thermal = thermal, .cdev = cdev, .bind = bind
+	};
+
+	return for_each_thermal_trip(thermal, bind_unbind_cdev_cb, &bd);
 }
 
 static int
 acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
 				 struct thermal_cooling_device *cdev)
 {
-	return acpi_thermal_cooling_device_cb(thermal, cdev, true);
+	return acpi_thermal_bind_unbind_cdev(thermal, cdev, true);
 }
 
 static int
 acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
 				   struct thermal_cooling_device *cdev)
 {
-	return acpi_thermal_cooling_device_cb(thermal, cdev, false);
+	return acpi_thermal_bind_unbind_cdev(thermal, cdev, false);
 }
 
 static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
@@ -679,66 +659,11 @@ static void acpi_thermal_zone_sysfs_remove(struct acpi_thermal *tz)
 	sysfs_remove_link(&tzdev->kobj, "device");
 }
 
-static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
+static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz,
+					      unsigned int trip_count,
+					      int passive_delay)
 {
-	struct acpi_thermal_trip *acpi_trip;
-	struct thermal_trip *trip;
-	int passive_delay = 0;
-	int trip_count = 0;
 	int result;
-	int i;
-
-	if (tz->trips.critical.valid)
-		trip_count++;
-
-	if (tz->trips.hot.valid)
-		trip_count++;
-
-	if (tz->trips.passive.trip.valid) {
-		trip_count++;
-		passive_delay = tz->trips.passive.tsp * 100;
-	}
-
-	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->trips.active[i].trip.valid; i++)
-		trip_count++;
-
-	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,
@@ -748,10 +673,8 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 								   NULL,
 								   passive_delay,
 								   tz->polling_frequency * 100);
-	if (IS_ERR(tz->thermal_zone)) {
-		result = PTR_ERR(tz->thermal_zone);
-		goto free_trip_table;
-	}
+	if (IS_ERR(tz->thermal_zone))
+		return PTR_ERR(tz->thermal_zone);
 
 	result = acpi_thermal_zone_sysfs_add(tz);
 	if (result)
@@ -770,8 +693,6 @@ 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;
 }
@@ -844,38 +765,6 @@ static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
 	acpi_evaluate_integer(handle, "_TMP", NULL, &value);
 }
 
-static int acpi_thermal_get_info(struct acpi_thermal *tz)
-{
-	int result;
-
-	if (!tz)
-		return -EINVAL;
-
-	acpi_thermal_aml_dependency_fix(tz);
-
-	/* Get trip points [_CRT, _PSV, etc.] (required) */
-	result = acpi_thermal_get_trip_points(tz);
-	if (result)
-		return result;
-
-	/* Get temperature [_TMP] (required) */
-	result = acpi_thermal_get_temperature(tz);
-	if (result)
-		return result;
-
-	/* Set the cooling mode [_SCP] to active cooling (default) */
-	acpi_execute_simple_method(tz->device->handle, "_SCP",
-				   ACPI_THERMAL_MODE_ACTIVE);
-
-	/* Get default polling frequency [_TZP] (optional) */
-	if (tzp)
-		tz->polling_frequency = tzp;
-	else
-		acpi_thermal_get_polling_frequency(tz);
-
-	return 0;
-}
-
 /*
  * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
  * handles temperature values with a single decimal place. As a consequence,
@@ -886,10 +775,9 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz)
  * The heuristic below should work for all ACPI thermal zones which have a
  * critical trip point with a value being a multiple of 0.5 degree Celsius.
  */
-static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
+static void acpi_thermal_guess_offset(struct acpi_thermal *tz, long crit_temp)
 {
-	if (tz->trips.critical.valid &&
-	    (tz->trips.critical.temperature % 5) == 1)
+	if (crit_temp != THERMAL_TEMP_INVALID && crit_temp % 5 == 1)
 		tz->kelvin_offset = 273100;
 	else
 		tz->kelvin_offset = 273200;
@@ -922,8 +810,14 @@ static void acpi_thermal_check_fn(struct work_struct *work)
 
 static int acpi_thermal_add(struct acpi_device *device)
 {
+	struct acpi_thermal_trip *acpi_trip;
+	struct thermal_trip *trip;
 	struct acpi_thermal *tz;
+	unsigned int trip_count;
+	int crit_temp, hot_temp;
+	int passive_delay = 0;
 	int result;
+	int i;
 
 	if (!device)
 		return -EINVAL;
@@ -938,22 +832,94 @@ static int acpi_thermal_add(struct acpi_device *device)
 	strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
 	device->driver_data = tz;
 
-	result = acpi_thermal_get_info(tz);
+	acpi_thermal_aml_dependency_fix(tz);
+
+	/* Get trip points [_CRT, _PSV, etc.] (required). */
+	trip_count = acpi_thermal_get_trip_points(tz);
+
+	crit_temp = acpi_thermal_get_critical_trip(tz);
+	if (crit_temp != THERMAL_TEMP_INVALID)
+		trip_count++;
+
+	hot_temp = acpi_thermal_get_hot_trip(tz);
+	if (hot_temp != THERMAL_TEMP_INVALID)
+		trip_count++;
+
+	if (!trip_count) {
+		pr_warn(FW_BUG "No valid trip points!\n");
+		result = -ENODEV;
+		goto free_memory;
+	}
+
+	/* Get temperature [_TMP] (required). */
+	result = acpi_thermal_get_temperature(tz);
 	if (result)
 		goto free_memory;
 
-	acpi_thermal_guess_offset(tz);
+	/* Set the cooling mode [_SCP] to active cooling. */
+	acpi_execute_simple_method(tz->device->handle, "_SCP",
+				   ACPI_THERMAL_MODE_ACTIVE);
 
-	result = acpi_thermal_register_thermal_zone(tz);
-	if (result)
+	/* Determine the default polling frequency [_TZP]. */
+	if (tzp)
+		tz->polling_frequency = tzp;
+	else
+		acpi_thermal_get_polling_frequency(tz);
+
+	acpi_thermal_guess_offset(tz, crit_temp);
+
+	trip = kcalloc(trip_count, sizeof(*trip), GFP_KERNEL);
+	if (!trip) {
+		result = -ENOMEM;
 		goto free_memory;
+	}
+
+	tz->trip_table = trip;
+
+	if (crit_temp != THERMAL_TEMP_INVALID) {
+		trip->type = THERMAL_TRIP_CRITICAL;
+		trip->temperature = acpi_thermal_temp(tz, crit_temp);
+		trip++;
+	}
+
+	if (hot_temp != THERMAL_TEMP_INVALID) {
+		trip->type = THERMAL_TRIP_HOT;
+		trip->temperature = acpi_thermal_temp(tz, hot_temp);
+		trip++;
+	}
+
+	acpi_trip = &tz->trips.passive.trip;
+	if (acpi_thermal_trip_valid(acpi_trip)) {
+		passive_delay = tz->trips.passive.tsp * 100;
+
+		trip->type = THERMAL_TRIP_PASSIVE;
+		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temp_dk);
+		trip->priv = acpi_trip;
+		trip++;
+	}
+
+	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+		acpi_trip =  &tz->trips.active[i].trip;
+
+		if (!acpi_thermal_trip_valid(acpi_trip))
+			break;
+
+		trip->type = THERMAL_TRIP_ACTIVE;
+		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temp_dk);
+		trip->priv = acpi_trip;
+		trip++;
+	}
+
+	result = acpi_thermal_register_thermal_zone(tz, trip_count, passive_delay);
+	if (result)
+		goto free_trips;
 
 	refcount_set(&tz->thermal_check_count, 3);
 	mutex_init(&tz->thermal_check_lock);
 	INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn);
 
 	pr_info("%s [%s] (%ld C)\n", acpi_device_name(device),
-		acpi_device_bid(device), deci_kelvin_to_celsius(tz->temperature));
+		acpi_device_bid(device), deci_kelvin_to_celsius(tz->temp_dk));
 
 	result = acpi_dev_install_notify_handler(device, ACPI_DEVICE_NOTIFY,
 						 acpi_thermal_notify);
@@ -965,6 +931,8 @@ static int acpi_thermal_add(struct acpi_device *device)
 flush_wq:
 	flush_workqueue(acpi_thermal_pm_queue);
 	acpi_thermal_unregister_thermal_zone(tz);
+free_trips:
+	kfree(tz->trip_table);
 free_memory:
 	kfree(tz);
 
@@ -1010,11 +978,13 @@ static int acpi_thermal_resume(struct device *dev)
 		return -EINVAL;
 
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
-		if (!tz->trips.active[i].trip.valid)
+		struct acpi_thermal_trip *acpi_trip = &tz->trips.active[i].trip;
+
+		if (!acpi_thermal_trip_valid(acpi_trip))
 			break;
 
-		for (j = 0; j < tz->trips.active[i].devices.count; j++) {
-			acpi_bus_update_power(tz->trips.active[i].devices.handles[j],
+		for (j = 0; j < acpi_trip->devices.count; j++) {
+			acpi_bus_update_power(acpi_trip->devices.handles[j],
 					      &power_state);
 		}
 	}
@@ -1046,7 +1016,8 @@ static struct acpi_driver acpi_thermal_driver = {
 	.drv.pm = &acpi_thermal_pm,
 };
 
-static int thermal_act(const struct dmi_system_id *d) {
+static int thermal_act(const struct dmi_system_id *d)
+{
 	if (act == 0) {
 		pr_notice("%s detected: disabling all active thermal trip points\n",
 			  d->ident);
@@ -1054,13 +1025,17 @@ static int thermal_act(const struct dmi_system_id *d) {
 	}
 	return 0;
 }
-static int thermal_nocrt(const struct dmi_system_id *d) {
+
+static int thermal_nocrt(const struct dmi_system_id *d)
+{
 	pr_notice("%s detected: disabling all critical thermal trip point actions.\n",
 		  d->ident);
 	crt = -1;
 	return 0;
 }
-static int thermal_tzp(const struct dmi_system_id *d) {
+
+static int thermal_tzp(const struct dmi_system_id *d)
+{
 	if (tzp == 0) {
 		pr_notice("%s detected: enabling thermal zone polling\n",
 			  d->ident);
@@ -1068,7 +1043,9 @@ static int thermal_tzp(const struct dmi_system_id *d) {
 	}
 	return 0;
 }
-static int thermal_psv(const struct dmi_system_id *d) {
+
+static int thermal_psv(const struct dmi_system_id *d)
+{
 	if (psv == 0) {
 		pr_notice("%s detected: disabling all passive thermal trip points\n",
 			  d->ident);