Merge back thermal core material for 6.12.

Documentation/driver-api/thermal/sysfs-api.rst

@@ -459,14 +459,7 @@ are supposed to implement the callback. If they don't, the thermal
 framework calculated the trend by comparing the previous and the current
 temperature values.
 
-4.2. get_thermal_instance
+4.2. thermal_cdev_update
--------------------------
-
-This function returns the thermal_instance corresponding to a given
-{thermal_zone, cooling_device, trip_point} combination. Returns NULL
-if such an instance does not exist.
-
-4.3. thermal_cdev_update
 ------------------------
 
 This function serves as an arbitrator to set the state of a cooling

drivers/thermal/broadcom/bcm2835_thermal.c

@@ -208,8 +208,7 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)
 	 */
 	val = readl(data->regs + BCM2835_TS_TSENSCTL);
 	if (!(val & BCM2835_TS_TSENSCTL_RSTB)) {
-		struct thermal_trip trip;
+		int offset, slope, crit_temp;
-		int offset, slope;
 
 		slope = thermal_zone_get_slope(tz);
 		offset = thermal_zone_get_offset(tz);
@@ -217,7 +216,7 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)
 		 * For now we deal only with critical, otherwise
 		 * would need to iterate
 		 */
-		err = thermal_zone_get_trip(tz, 0, &trip);
+		err = thermal_zone_get_crit_temp(tz, &crit_temp);
 		if (err < 0) {
 			dev_err(dev, "Not able to read trip_temp: %d\n", err);
 			return err;
@@ -232,7 +231,7 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)
 		val |= (0xFE << BCM2835_TS_TSENSCTL_RSTDELAY_SHIFT);
 
 		/*  trip_adc value from info */
-		val |= bcm2835_thermal_temp2adc(trip.temperature,
+		val |= bcm2835_thermal_temp2adc(crit_temp,
 						offset,
 						slope)
 			<< BCM2835_TS_TSENSCTL_THOLD_SHIFT;

drivers/thermal/hisi_thermal.c

@@ -465,11 +465,22 @@ static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev)
 	return IRQ_HANDLED;
 }
 
+static int hisi_trip_walk_cb(struct thermal_trip *trip, void *arg)
+{
+	struct hisi_thermal_sensor *sensor = arg;
+
+	if (trip->type != THERMAL_TRIP_PASSIVE)
+		return 0;
+
+	sensor->thres_temp = trip->temperature;
+	/* Return nonzero to terminate the search. */
+	return 1;
+}
+
 static int hisi_thermal_register_sensor(struct platform_device *pdev,
 					struct hisi_thermal_sensor *sensor)
 {
-	int ret, i;
+	int ret;
-	struct thermal_trip trip;
 
 	sensor->tzd = devm_thermal_of_zone_register(&pdev->dev,
 						    sensor->id, sensor,
@@ -482,15 +493,7 @@ static int hisi_thermal_register_sensor(struct platform_device *pdev,
 		return ret;
 	}
 
-	for (i = 0; i < thermal_zone_get_num_trips(sensor->tzd); i++) {
+	thermal_zone_for_each_trip(sensor->tzd, hisi_trip_walk_cb, sensor);
-
-		thermal_zone_get_trip(sensor->tzd, i, &trip);
-
-		if (trip.type == THERMAL_TRIP_PASSIVE) {
-			sensor->thres_temp = trip.temperature;
-			break;
-		}
-	}
 
 	return 0;
 }

drivers/thermal/qcom/qcom-spmi-temp-alarm.c

@@ -291,24 +291,6 @@ static irqreturn_t qpnp_tm_isr(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static int qpnp_tm_get_critical_trip_temp(struct qpnp_tm_chip *chip)
-{
-	struct thermal_trip trip;
-	int i, ret;
-
-	for (i = 0; i < thermal_zone_get_num_trips(chip->tz_dev); i++) {
-
-		ret = thermal_zone_get_trip(chip->tz_dev, i, &trip);
-		if (ret)
-			continue;
-
-		if (trip.type == THERMAL_TRIP_CRITICAL)
-			return trip.temperature;
-	}
-
-	return THERMAL_TEMP_INVALID;
-}
-
 /*
  * This function initializes the internal temp value based on only the
  * current thermal stage and threshold. Setup threshold control and
@@ -343,7 +325,9 @@ static int qpnp_tm_init(struct qpnp_tm_chip *chip)
 
 	mutex_unlock(&chip->lock);
 
-	crit_temp = qpnp_tm_get_critical_trip_temp(chip);
+	ret = thermal_zone_get_crit_temp(chip->tz_dev, &crit_temp);
+	if (ret)
+		crit_temp = THERMAL_TEMP_INVALID;
 
 	mutex_lock(&chip->lock);
 

drivers/thermal/renesas/rcar_gen3_thermal.c

@@ -563,11 +563,7 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev)
 		if (ret)
 			goto error_unregister;
 
-		ret = thermal_zone_get_num_trips(tsc->zone);
+		dev_info(dev, "Sensor %u: Loaded\n", i);
-		if (ret < 0)
-			goto error_unregister;
-
-		dev_info(dev, "Sensor %u: Loaded %d trip points\n", i, ret);
 	}
 
 	if (!priv->num_tscs) {

drivers/thermal/tegra/soctherm.c

@@ -682,24 +682,25 @@ static const struct thermal_zone_device_ops tegra_of_thermal_ops = {
 	.set_trips = tegra_thermctl_set_trips,
 };
 
-static int get_hot_temp(struct thermal_zone_device *tz, int *trip_id, int *temp)
+static int get_hot_trip_cb(struct thermal_trip *trip, void *arg)
 {
-	int i, ret;
+	const struct thermal_trip **trip_ret = arg;
-	struct thermal_trip trip;
 
-	for (i = 0; i < thermal_zone_get_num_trips(tz); i++) {
+	if (trip->type != THERMAL_TRIP_HOT)
+		return 0;
 
-		ret = thermal_zone_get_trip(tz, i, &trip);
+	*trip_ret = trip;
-		if (ret)
+	/* Return nonzero to terminate the search. */
-			return -EINVAL;
+	return 1;
+}
 
-		if (trip.type == THERMAL_TRIP_HOT) {
+static const struct thermal_trip *get_hot_trip(struct thermal_zone_device *tz)
-			*trip_id = i;
+{
-			return 0;
+	const struct thermal_trip *trip = NULL;
-		}
-	}
 
-	return -EINVAL;
+	thermal_zone_for_each_trip(tz, get_hot_trip_cb, &trip);
+
+	return trip;
 }
 
 /**
@@ -731,8 +732,9 @@ static int tegra_soctherm_set_hwtrips(struct device *dev,
 				      struct thermal_zone_device *tz)
 {
 	struct tegra_soctherm *ts = dev_get_drvdata(dev);
+	const struct thermal_trip *hot_trip;
 	struct soctherm_throt_cfg *stc;
-	int i, trip, temperature, ret;
+	int i, temperature, ret;
 
 	/* Get thermtrips. If missing, try to get critical trips. */
 	temperature = tsensor_group_thermtrip_get(ts, sg->id);
@@ -749,8 +751,8 @@ static int tegra_soctherm_set_hwtrips(struct device *dev,
 	dev_info(dev, "thermtrip: will shut down when %s reaches %d mC\n",
 		 sg->name, temperature);
 
-	ret = get_hot_temp(tz, &trip, &temperature);
+	hot_trip = get_hot_trip(tz);
-	if (ret) {
+	if (!hot_trip) {
 		dev_info(dev, "throttrip: %s: missing hot temperature\n",
 			 sg->name);
 		return 0;
@@ -763,7 +765,7 @@ static int tegra_soctherm_set_hwtrips(struct device *dev,
 			continue;
 
 		cdev = ts->throt_cfgs[i].cdev;
-		if (get_thermal_instance(tz, cdev, trip))
+		if (thermal_trip_is_bound_to_cdev(tz, hot_trip, cdev))
 			stc = find_throttle_cfg_by_name(ts, cdev->type);
 		else
 			continue;

drivers/thermal/tegra/tegra30-tsensor.c

@@ -303,33 +303,37 @@ stop_channel:
 	return 0;
 }
 
-static void tegra_tsensor_get_hw_channel_trips(struct thermal_zone_device *tzd,
+struct trip_temps {
-					       int *hot_trip, int *crit_trip)
+	int hot_trip;
-{
+	int crit_trip;
-	unsigned int i;
+};
 
+static int tegra_tsensor_get_trips_cb(struct thermal_trip *trip, void *arg)
+{
+	struct trip_temps *temps = arg;
+
+	if (trip->type == THERMAL_TRIP_HOT)
+		temps->hot_trip = trip->temperature;
+	else if (trip->type == THERMAL_TRIP_CRITICAL)
+		temps->crit_trip = trip->temperature;
+
+	return 0;
+}
+
+static void tegra_tsensor_get_hw_channel_trips(struct thermal_zone_device *tzd,
+					       struct trip_temps *temps)
+{
 	/*
 	 * 90C is the maximal critical temperature of all Tegra30 SoC variants,
 	 * use it for the default trip if unspecified in a device-tree.
 	 */
-	*hot_trip  = 85000;
+	temps->hot_trip  = 85000;
-	*crit_trip = 90000;
+	temps->crit_trip = 90000;
 
-	for (i = 0; i < thermal_zone_get_num_trips(tzd); i++) {
+	thermal_zone_for_each_trip(tzd, tegra_tsensor_get_trips_cb, temps);
-
-		struct thermal_trip trip;
-
-		thermal_zone_get_trip(tzd, i, &trip);
-
-		if (trip.type == THERMAL_TRIP_HOT)
-			*hot_trip = trip.temperature;
-
-		if (trip.type == THERMAL_TRIP_CRITICAL)
-			*crit_trip = trip.temperature;
-	}
 
 	/* clamp hardware trips to the calibration limits */
-	*hot_trip = clamp(*hot_trip, 25000, 90000);
+	temps->hot_trip = clamp(temps->hot_trip, 25000, 90000);
 
 	/*
 	 * Kernel will perform a normal system shut down if it will
@@ -338,7 +342,7 @@ static void tegra_tsensor_get_hw_channel_trips(struct thermal_zone_device *tzd,
 	 * shut down gracefully before sending signal to the Power
 	 * Management controller.
 	 */
-	*crit_trip = clamp(*crit_trip + 5000, 25000, 90000);
+	temps->crit_trip = clamp(temps->crit_trip + 5000, 25000, 90000);
 }
 
 static int tegra_tsensor_enable_hw_channel(const struct tegra_tsensor *ts,
@@ -346,7 +350,8 @@ static int tegra_tsensor_enable_hw_channel(const struct tegra_tsensor *ts,
 {
 	const struct tegra_tsensor_channel *tsc = &ts->ch[id];
 	struct thermal_zone_device *tzd = tsc->tzd;
-	int err, hot_trip = 0, crit_trip = 0;
+	struct trip_temps temps = { 0 };
+	int err;
 	u32 val;
 
 	if (!tzd) {
@@ -357,24 +362,24 @@ static int tegra_tsensor_enable_hw_channel(const struct tegra_tsensor *ts,
 		return 0;
 	}
 
-	tegra_tsensor_get_hw_channel_trips(tzd, &hot_trip, &crit_trip);
+	tegra_tsensor_get_hw_channel_trips(tzd, &temps);
 
 	dev_info_once(ts->dev, "ch%u: PMC emergency shutdown trip set to %dC\n",
-		      id, DIV_ROUND_CLOSEST(crit_trip, 1000));
+		      id, DIV_ROUND_CLOSEST(temps.crit_trip, 1000));
 
-	hot_trip  = tegra_tsensor_temp_to_counter(ts, hot_trip);
+	temps.hot_trip  = tegra_tsensor_temp_to_counter(ts, temps.hot_trip);
-	crit_trip = tegra_tsensor_temp_to_counter(ts, crit_trip);
+	temps.crit_trip = tegra_tsensor_temp_to_counter(ts, temps.crit_trip);
 
 	/* program LEVEL2 counter threshold */
 	val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG1);
 	val &= ~TSENSOR_SENSOR0_CONFIG1_TH2;
-	val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG1_TH2, hot_trip);
+	val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG1_TH2, temps.hot_trip);
 	writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG1);
 
 	/* program LEVEL3 counter threshold */
 	val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG2);
 	val &= ~TSENSOR_SENSOR0_CONFIG2_TH3;
-	val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG2_TH3, crit_trip);
+	val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG2_TH3, temps.crit_trip);
 	writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG2);
 
 	/*

drivers/thermal/thermal_core.h

@@ -15,8 +15,20 @@
 #include "thermal_netlink.h"
 #include "thermal_debugfs.h"
 
+struct thermal_attr {
+	struct device_attribute attr;
+	char name[THERMAL_NAME_LENGTH];
+};
+
+struct thermal_trip_attrs {
+	struct thermal_attr type;
+	struct thermal_attr temp;
+	struct thermal_attr hyst;
+};
+
 struct thermal_trip_desc {
 	struct thermal_trip trip;
+	struct thermal_trip_attrs trip_attrs;
 	struct list_head notify_list_node;
 	int notify_temp;
 	int threshold;
@@ -56,9 +68,6 @@ struct thermal_governor {
  * @device:	&struct device for this thermal zone
  * @removal:	removal completion
  * @resume:	resume completion
- * @trip_temp_attrs:	attributes for trip points for sysfs: trip temperature
- * @trip_type_attrs:	attributes for trip points for sysfs: trip type
- * @trip_hyst_attrs:	attributes for trip points for sysfs: trip hysteresis
  * @mode:		current mode of this thermal zone
  * @devdata:	private pointer for device private data
  * @num_trips:	number of trip points the thermal zone supports
@@ -102,9 +111,6 @@ struct thermal_zone_device {
 	struct completion removal;
 	struct completion resume;
 	struct attribute_group trips_attribute_group;
-	struct thermal_attr *trip_temp_attrs;
-	struct thermal_attr *trip_type_attrs;
-	struct thermal_attr *trip_hyst_attrs;
 	enum thermal_device_mode mode;
 	void *devdata;
 	int num_trips;
@@ -188,11 +194,6 @@ int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *),
 
 struct thermal_zone_device *thermal_zone_get_by_id(int id);
 
-struct thermal_attr {
-	struct device_attribute attr;
-	char name[THERMAL_NAME_LENGTH];
-};
-
 static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
 {
 	return cdev->ops->get_requested_power && cdev->ops->state2power &&
@@ -204,11 +205,6 @@ void __thermal_cdev_update(struct thermal_cooling_device *cdev);
 
 int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip);
 
-struct thermal_instance *
-get_thermal_instance(struct thermal_zone_device *tz,
-		     struct thermal_cooling_device *cdev,
-		     int trip);
-
 /*
  * This structure is used to describe the behavior of
  * a certain cooling device on a certain trip point
@@ -262,11 +258,11 @@ const char *thermal_trip_type_name(enum thermal_trip_type trip_type);
 void thermal_zone_set_trips(struct thermal_zone_device *tz);
 int thermal_zone_trip_id(const struct thermal_zone_device *tz,
 			 const struct thermal_trip *trip);
-void thermal_zone_trip_updated(struct thermal_zone_device *tz,
-			       const struct thermal_trip *trip);
 int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
 void thermal_zone_trip_down(struct thermal_zone_device *tz,
 			    const struct thermal_trip *trip);
+void thermal_zone_set_trip_hyst(struct thermal_zone_device *tz,
+				struct thermal_trip *trip, int hyst);
 
 /* sysfs I/F */
 int thermal_zone_create_device_groups(struct thermal_zone_device *tz);

drivers/thermal/thermal_helpers.c

@@ -39,18 +39,18 @@ int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip
 	return trend;
 }
 
-static struct thermal_instance *get_instance(struct thermal_zone_device *tz,
+static bool thermal_instance_present(struct thermal_zone_device *tz,
-					     struct thermal_cooling_device *cdev,
+				     struct thermal_cooling_device *cdev,
-					     const struct thermal_trip *trip)
+				     const struct thermal_trip *trip)
 {
 	struct thermal_instance *ti;
 
 	list_for_each_entry(ti, &tz->thermal_instances, tz_node) {
 		if (ti->trip == trip && ti->cdev == cdev)
-			return ti;
+			return true;
 	}
 
-	return NULL;
+	return false;
 }
 
 bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
@@ -62,7 +62,7 @@ bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
 	mutex_lock(&tz->lock);
 	mutex_lock(&cdev->lock);
 
-	ret = !!get_instance(tz, cdev, trip);
+	ret = thermal_instance_present(tz, cdev, trip);
 
 	mutex_unlock(&cdev->lock);
 	mutex_unlock(&tz->lock);
@@ -71,24 +71,6 @@ bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
 }
 EXPORT_SYMBOL_GPL(thermal_trip_is_bound_to_cdev);
 
-struct thermal_instance *
-get_thermal_instance(struct thermal_zone_device *tz,
-		     struct thermal_cooling_device *cdev, int trip_index)
-{
-	struct thermal_instance *ti;
-
-	mutex_lock(&tz->lock);
-	mutex_lock(&cdev->lock);
-
-	ti = get_instance(tz, cdev, &tz->trips[trip_index].trip);
-
-	mutex_unlock(&cdev->lock);
-	mutex_unlock(&tz->lock);
-
-	return ti;
-}
-EXPORT_SYMBOL(get_thermal_instance);
-
 /**
  * __thermal_zone_get_temp() - returns the temperature of a thermal zone
  * @tz: a valid pointer to a struct thermal_zone_device

drivers/thermal/thermal_sysfs.c

@@ -12,6 +12,7 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <linux/container_of.h>
 #include <linux/sysfs.h>
 #include <linux/device.h>
 #include <linux/err.h>
@@ -78,39 +79,38 @@ mode_store(struct device *dev, struct device_attribute *attr,
 	return count;
 }
 
+#define thermal_trip_of_attr(_ptr_, _attr_)				\
+	({ 								\
+		struct thermal_trip_desc *td;				\
+									\
+		td = container_of(_ptr_, struct thermal_trip_desc,	\
+				  trip_attrs._attr_.attr);		\
+		&td->trip;						\
+	})
+
 static ssize_t
 trip_point_type_show(struct device *dev, struct device_attribute *attr,
 		     char *buf)
 {
-	struct thermal_zone_device *tz = to_thermal_zone(dev);
+	struct thermal_trip *trip = thermal_trip_of_attr(attr, type);
-	int trip_id;
 
-	if (sscanf(attr->attr.name, "trip_point_%d_type", &trip_id) != 1)
+	return sprintf(buf, "%s\n", thermal_trip_type_name(trip->type));
-		return -EINVAL;
-
-	return sprintf(buf, "%s\n", thermal_trip_type_name(tz->trips[trip_id].trip.type));
 }
 
 static ssize_t
 trip_point_temp_store(struct device *dev, struct device_attribute *attr,
 		      const char *buf, size_t count)
 {
+	struct thermal_trip *trip = thermal_trip_of_attr(attr, temp);
 	struct thermal_zone_device *tz = to_thermal_zone(dev);
-	struct thermal_trip *trip;
+	int ret, temp;
-	int trip_id, ret;
-	int temp;
 
 	ret = kstrtoint(buf, 10, &temp);
 	if (ret)
 		return -EINVAL;
 
-	if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) != 1)
-		return -EINVAL;
-
 	mutex_lock(&tz->lock);
 
-	trip = &tz->trips[trip_id].trip;
-
 	if (temp != trip->temperature) {
 		if (tz->ops.set_trip_temp) {
 			ret = tz->ops.set_trip_temp(tz, trip, temp);
@@ -133,39 +133,29 @@ static ssize_t
 trip_point_temp_show(struct device *dev, struct device_attribute *attr,
 		     char *buf)
 {
-	struct thermal_zone_device *tz = to_thermal_zone(dev);
+	struct thermal_trip *trip = thermal_trip_of_attr(attr, temp);
-	int trip_id;
 
-	if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) != 1)
+	return sprintf(buf, "%d\n", READ_ONCE(trip->temperature));
-		return -EINVAL;
-
-	return sprintf(buf, "%d\n", READ_ONCE(tz->trips[trip_id].trip.temperature));
 }
 
 static ssize_t
 trip_point_hyst_store(struct device *dev, struct device_attribute *attr,
 		      const char *buf, size_t count)
 {
+	struct thermal_trip *trip = thermal_trip_of_attr(attr, hyst);
 	struct thermal_zone_device *tz = to_thermal_zone(dev);
-	struct thermal_trip *trip;
+	int ret, hyst;
-	int trip_id, ret;
-	int hyst;
 
 	ret = kstrtoint(buf, 10, &hyst);
 	if (ret || hyst < 0)
 		return -EINVAL;
 
-	if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip_id) != 1)
-		return -EINVAL;
-
 	mutex_lock(&tz->lock);
 
-	trip = &tz->trips[trip_id].trip;
-
 	if (hyst != trip->hysteresis) {
-		WRITE_ONCE(trip->hysteresis, hyst);
+		thermal_zone_set_trip_hyst(tz, trip, hyst);
 
-		thermal_zone_trip_updated(tz, trip);
+		__thermal_zone_device_update(tz, THERMAL_TRIP_CHANGED);
 	}
 
 	mutex_unlock(&tz->lock);
@@ -177,13 +167,9 @@ static ssize_t
 trip_point_hyst_show(struct device *dev, struct device_attribute *attr,
 		     char *buf)
 {
-	struct thermal_zone_device *tz = to_thermal_zone(dev);
+	struct thermal_trip *trip = thermal_trip_of_attr(attr, hyst);
-	int trip_id;
 
-	if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip_id) != 1)
+	return sprintf(buf, "%d\n", READ_ONCE(trip->hysteresis));
-		return -EINVAL;
-
-	return sprintf(buf, "%d\n", READ_ONCE(tz->trips[trip_id].trip.hysteresis));
 }
 
 static ssize_t
@@ -382,87 +368,55 @@ static const struct attribute_group *thermal_zone_attribute_groups[] = {
  */
 static int create_trip_attrs(struct thermal_zone_device *tz)
 {
-	const struct thermal_trip_desc *td;
+	struct thermal_trip_desc *td;
 	struct attribute **attrs;
-
+	int i;
-	/* This function works only for zones with at least one trip */
-	if (tz->num_trips <= 0)
-		return -EINVAL;
-
-	tz->trip_type_attrs = kcalloc(tz->num_trips, sizeof(*tz->trip_type_attrs),
-				      GFP_KERNEL);
-	if (!tz->trip_type_attrs)
-		return -ENOMEM;
-
-	tz->trip_temp_attrs = kcalloc(tz->num_trips, sizeof(*tz->trip_temp_attrs),
-				      GFP_KERNEL);
-	if (!tz->trip_temp_attrs) {
-		kfree(tz->trip_type_attrs);
-		return -ENOMEM;
-	}
-
-	tz->trip_hyst_attrs = kcalloc(tz->num_trips,
-				      sizeof(*tz->trip_hyst_attrs),
-				      GFP_KERNEL);
-	if (!tz->trip_hyst_attrs) {
-		kfree(tz->trip_type_attrs);
-		kfree(tz->trip_temp_attrs);
-		return -ENOMEM;
-	}
 
 	attrs = kcalloc(tz->num_trips * 3 + 1, sizeof(*attrs), GFP_KERNEL);
-	if (!attrs) {
+	if (!attrs)
-		kfree(tz->trip_type_attrs);
-		kfree(tz->trip_temp_attrs);
-		kfree(tz->trip_hyst_attrs);
 		return -ENOMEM;
-	}
 
+	i = 0;
 	for_each_trip_desc(tz, td) {
-		int indx = thermal_zone_trip_id(tz, &td->trip);
+		struct thermal_trip_attrs *trip_attrs = &td->trip_attrs;
 
 		/* create trip type attribute */
-		snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH,
+		snprintf(trip_attrs->type.name, THERMAL_NAME_LENGTH,
-			 "trip_point_%d_type", indx);
+			 "trip_point_%d_type", i);
 
-		sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr);
+		sysfs_attr_init(&trip_attrs->type.attr.attr);
-		tz->trip_type_attrs[indx].attr.attr.name =
+		trip_attrs->type.attr.attr.name = trip_attrs->type.name;
-						tz->trip_type_attrs[indx].name;
+		trip_attrs->type.attr.attr.mode = S_IRUGO;
-		tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO;
+		trip_attrs->type.attr.show = trip_point_type_show;
-		tz->trip_type_attrs[indx].attr.show = trip_point_type_show;
+		attrs[i] = &trip_attrs->type.attr.attr;
-		attrs[indx] = &tz->trip_type_attrs[indx].attr.attr;
 
 		/* create trip temp attribute */
-		snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH,
+		snprintf(trip_attrs->temp.name, THERMAL_NAME_LENGTH,
-			 "trip_point_%d_temp", indx);
+			 "trip_point_%d_temp", i);
 
-		sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr);
+		sysfs_attr_init(&trip_attrs->temp.attr.attr);
-		tz->trip_temp_attrs[indx].attr.attr.name =
+		trip_attrs->temp.attr.attr.name = trip_attrs->temp.name;
-						tz->trip_temp_attrs[indx].name;
+		trip_attrs->temp.attr.attr.mode = S_IRUGO;
-		tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO;
+		trip_attrs->temp.attr.show = trip_point_temp_show;
-		tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show;
 		if (td->trip.flags & THERMAL_TRIP_FLAG_RW_TEMP) {
-			tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR;
+			trip_attrs->temp.attr.attr.mode |= S_IWUSR;
-			tz->trip_temp_attrs[indx].attr.store =
+			trip_attrs->temp.attr.store = trip_point_temp_store;
-							trip_point_temp_store;
 		}
-		attrs[indx + tz->num_trips] = &tz->trip_temp_attrs[indx].attr.attr;
+		attrs[i + tz->num_trips] = &trip_attrs->temp.attr.attr;
 
-		snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH,
+		snprintf(trip_attrs->hyst.name, THERMAL_NAME_LENGTH,
-			 "trip_point_%d_hyst", indx);
+			 "trip_point_%d_hyst", i);
 
-		sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr);
+		sysfs_attr_init(&trip_attrs->hyst.attr.attr);
-		tz->trip_hyst_attrs[indx].attr.attr.name =
+		trip_attrs->hyst.attr.attr.name = trip_attrs->hyst.name;
-					tz->trip_hyst_attrs[indx].name;
+		trip_attrs->hyst.attr.attr.mode = S_IRUGO;
-		tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO;
+		trip_attrs->hyst.attr.show = trip_point_hyst_show;
-		tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show;
 		if (td->trip.flags & THERMAL_TRIP_FLAG_RW_HYST) {
-			tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR;
+			trip_attrs->hyst.attr.attr.mode |= S_IWUSR;
-			tz->trip_hyst_attrs[indx].attr.store =
+			trip_attrs->hyst.attr.store = trip_point_hyst_store;
-					trip_point_hyst_store;
 		}
-		attrs[indx + tz->num_trips * 2] =
+		attrs[i + 2 * tz->num_trips] = &trip_attrs->hyst.attr.attr;
-					&tz->trip_hyst_attrs[indx].attr.attr;
+		i++;
 	}
 	attrs[tz->num_trips * 3] = NULL;
 
@@ -479,13 +433,8 @@ static int create_trip_attrs(struct thermal_zone_device *tz)
  */
 static void destroy_trip_attrs(struct thermal_zone_device *tz)
 {
-	if (!tz)
+	if (tz)
-		return;
+		kfree(tz->trips_attribute_group.attrs);
-
-	kfree(tz->trip_type_attrs);
-	kfree(tz->trip_temp_attrs);
-	kfree(tz->trip_hyst_attrs);
-	kfree(tz->trips_attribute_group.attrs);
 }
 
 int thermal_zone_create_device_groups(struct thermal_zone_device *tz)

drivers/thermal/thermal_trip.c

@@ -55,12 +55,6 @@ int thermal_zone_for_each_trip(struct thermal_zone_device *tz,
 }
 EXPORT_SYMBOL_GPL(thermal_zone_for_each_trip);
 
-int thermal_zone_get_num_trips(struct thermal_zone_device *tz)
-{
-	return tz->num_trips;
-}
-EXPORT_SYMBOL_GPL(thermal_zone_get_num_trips);
-
 /**
  * thermal_zone_set_trips - Computes the next trip points for the driver
  * @tz: a pointer to a thermal zone device structure
@@ -114,20 +108,6 @@ void thermal_zone_set_trips(struct thermal_zone_device *tz)
 		dev_err(&tz->device, "Failed to set trips: %d\n", ret);
 }
 
-int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id,
-			  struct thermal_trip *trip)
-{
-	if (!tz || !trip || trip_id < 0 || trip_id >= tz->num_trips)
-		return -EINVAL;
-
-	mutex_lock(&tz->lock);
-	*trip = tz->trips[trip_id].trip;
-	mutex_unlock(&tz->lock);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(thermal_zone_get_trip);
-
 int thermal_zone_trip_id(const struct thermal_zone_device *tz,
 			 const struct thermal_trip *trip)
 {
@@ -138,11 +118,11 @@ int thermal_zone_trip_id(const struct thermal_zone_device *tz,
 	return trip_to_trip_desc(trip) - tz->trips;
 }
 
-void thermal_zone_trip_updated(struct thermal_zone_device *tz,
+void thermal_zone_set_trip_hyst(struct thermal_zone_device *tz,
-			       const struct thermal_trip *trip)
+				struct thermal_trip *trip, int hyst)
 {
+	WRITE_ONCE(trip->hysteresis, hyst);
 	thermal_notify_tz_trip_change(tz, trip);
-	__thermal_zone_device_update(tz, THERMAL_TRIP_CHANGED);
 }
 
 void thermal_zone_set_trip_temp(struct thermal_zone_device *tz,

include/linux/thermal.h

@@ -203,15 +203,12 @@ static inline void devm_thermal_of_zone_unregister(struct device *dev,
 }
 #endif
 
-int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id,
-			  struct thermal_trip *trip);
 int for_each_thermal_trip(struct thermal_zone_device *tz,
 			  int (*cb)(struct thermal_trip *, void *),
 			  void *data);
 int thermal_zone_for_each_trip(struct thermal_zone_device *tz,
 			       int (*cb)(struct thermal_trip *, void *),
 			       void *data);
-int thermal_zone_get_num_trips(struct thermal_zone_device *tz);
 void thermal_zone_set_trip_temp(struct thermal_zone_device *tz,
 				struct thermal_trip *trip, int temp);