Message-Id: <20230330104526.3196-1-rui.zhang@intel.com>
Date:   Thu, 30 Mar 2023 18:45:26 +0800
From:   Zhang Rui <rui.zhang@...el.com>
To:     linux-pm@...r.kernel.org, rafael.j.wysocki@...el.com,
        daniel.lezcano@...aro.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] thermal/core: Remove thermal_bind_params structure

Remove struct thermal_bind_params because no one is using it for thermal
binding now.

Signed-off-by: Zhang Rui <rui.zhang@...el.com>
---
 .../driver-api/thermal/sysfs-api.rst          |  40 ------
 drivers/thermal/thermal_core.c                | 129 ++----------------
 include/linux/thermal.h                       |  38 ------
 3 files changed, 11 insertions(+), 196 deletions(-)

diff --git a/Documentation/driver-api/thermal/sysfs-api.rst b/Documentation/driver-api/thermal/sysfs-api.rst
index 2e0f79a9e2ee..6c1175c6afba 100644
--- a/Documentation/driver-api/thermal/sysfs-api.rst
+++ b/Documentation/driver-api/thermal/sysfs-api.rst
@@ -304,42 +304,6 @@ temperature) and throttle appropriate devices.
 1.4 Thermal Zone Parameters
 ---------------------------
 
-    ::
-
-	struct thermal_bind_params
-
-    This structure defines the following parameters that are used to bind
-    a zone with a cooling device for a particular trip point.
-
-    .cdev:
-	     The cooling device pointer
-    .weight:
-	     The 'influence' of a particular cooling device on this
-	     zone. This is relative to the rest of the cooling
-	     devices. For example, if all cooling devices have a
-	     weight of 1, then they all contribute the same. You can
-	     use percentages if you want, but it's not mandatory. A
-	     weight of 0 means that this cooling device doesn't
-	     contribute to the cooling of this zone unless all cooling
-	     devices have a weight of 0. If all weights are 0, then
-	     they all contribute the same.
-    .trip_mask:
-	       This is a bit mask that gives the binding relation between
-	       this thermal zone and cdev, for a particular trip point.
-	       If nth bit is set, then the cdev and thermal zone are bound
-	       for trip point n.
-    .binding_limits:
-		     This is an array of cooling state limits. Must have
-		     exactly 2 * thermal_zone.number_of_trip_points. It is an
-		     array consisting of tuples <lower-state upper-state> of
-		     state limits. Each trip will be associated with one state
-		     limit tuple when binding. A NULL pointer means
-		     <THERMAL_NO_LIMITS THERMAL_NO_LIMITS> on all trips.
-		     These limits are used when binding a cdev to a trip point.
-    .match:
-	    This call back returns success(0) if the 'tz and cdev' need to
-	    be bound, as per platform data.
-
     ::
 
 	struct thermal_zone_params
@@ -357,10 +321,6 @@ temperature) and throttle appropriate devices.
 	       will be created. when no_hwmon == true, nothing will be done.
 	       In case the thermal_zone_params is NULL, the hwmon interface
 	       will be created (for backward compatibility).
-    .num_tbps:
-	       Number of thermal_bind_params entries for this zone
-    .tbp:
-	       thermal_bind_params entries
 
 2. sysfs attributes structure
 =============================
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index d51cacd66756..2e6a49dd527d 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -794,64 +794,18 @@ void print_bind_err_msg(struct thermal_zone_device *tz,
 		tz->type, cdev->type, ret);
 }
 
-static void __bind(struct thermal_zone_device *tz, int mask,
-		   struct thermal_cooling_device *cdev,
-		   unsigned long *limits,
-		   unsigned int weight)
-{
-	int i, ret;
-
-	for (i = 0; i < tz->num_trips; i++) {
-		if (mask & (1 << i)) {
-			unsigned long upper, lower;
-
-			upper = THERMAL_NO_LIMIT;
-			lower = THERMAL_NO_LIMIT;
-			if (limits) {
-				lower = limits[i * 2];
-				upper = limits[i * 2 + 1];
-			}
-			ret = thermal_zone_bind_cooling_device(tz, i, cdev,
-							       upper, lower,
-							       weight);
-			if (ret)
-				print_bind_err_msg(tz, cdev, ret);
-		}
-	}
-}
-
 static void bind_cdev(struct thermal_cooling_device *cdev)
 {
-	int i, ret;
-	const struct thermal_zone_params *tzp;
+	int ret;
 	struct thermal_zone_device *pos = NULL;
 
 	mutex_lock(&thermal_list_lock);
 
 	list_for_each_entry(pos, &thermal_tz_list, node) {
-		if (!pos->tzp && !pos->ops->bind)
-			continue;
-
 		if (pos->ops->bind) {
 			ret = pos->ops->bind(pos, cdev);
 			if (ret)
 				print_bind_err_msg(pos, cdev, ret);
-			continue;
-		}
-
-		tzp = pos->tzp;
-		if (!tzp || !tzp->tbp)
-			continue;
-
-		for (i = 0; i < tzp->num_tbps; i++) {
-			if (tzp->tbp[i].cdev || !tzp->tbp[i].match)
-				continue;
-			if (tzp->tbp[i].match(pos, cdev))
-				continue;
-			tzp->tbp[i].cdev = cdev;
-			__bind(pos, tzp->tbp[i].trip_mask, cdev,
-			       tzp->tbp[i].binding_limits,
-			       tzp->tbp[i].weight);
 		}
 	}
 
@@ -1138,16 +1092,6 @@ void thermal_cooling_device_update(struct thermal_cooling_device *cdev)
 }
 EXPORT_SYMBOL_GPL(thermal_cooling_device_update);
 
-static void __unbind(struct thermal_zone_device *tz, int mask,
-		     struct thermal_cooling_device *cdev)
-{
-	int i;
-
-	for (i = 0; i < tz->num_trips; i++)
-		if (mask & (1 << i))
-			thermal_zone_unbind_cooling_device(tz, i, cdev);
-}
-
 /**
  * thermal_cooling_device_unregister - removes a thermal cooling device
  * @cdev:	the thermal cooling device to remove.
@@ -1157,8 +1101,6 @@ static void __unbind(struct thermal_zone_device *tz, int mask,
  */
 void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
 {
-	int i;
-	const struct thermal_zone_params *tzp;
 	struct thermal_zone_device *tz;
 
 	if (!cdev)
@@ -1175,21 +1117,8 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
 
 	/* Unbind all thermal zones associated with 'this' cdev */
 	list_for_each_entry(tz, &thermal_tz_list, node) {
-		if (tz->ops->unbind) {
+		if (tz->ops->unbind)
 			tz->ops->unbind(tz, cdev);
-			continue;
-		}
-
-		if (!tz->tzp || !tz->tzp->tbp)
-			continue;
-
-		tzp = tz->tzp;
-		for (i = 0; i < tzp->num_tbps; i++) {
-			if (tzp->tbp[i].cdev == cdev) {
-				__unbind(tz, tzp->tbp[i].trip_mask, cdev);
-				tzp->tbp[i].cdev = NULL;
-			}
-		}
 	}
 
 	mutex_unlock(&thermal_list_lock);
@@ -1200,41 +1129,20 @@ EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister);
 
 static void bind_tz(struct thermal_zone_device *tz)
 {
-	int i, ret;
+	int ret;
 	struct thermal_cooling_device *pos = NULL;
-	const struct thermal_zone_params *tzp = tz->tzp;
 
-	if (!tzp && !tz->ops->bind)
+	if (!tz->ops->bind)
 		return;
 
 	mutex_lock(&thermal_list_lock);
 
-	/* If there is ops->bind, try to use ops->bind */
-	if (tz->ops->bind) {
-		list_for_each_entry(pos, &thermal_cdev_list, node) {
-			ret = tz->ops->bind(tz, pos);
-			if (ret)
-				print_bind_err_msg(tz, pos, ret);
-		}
-		goto exit;
-	}
-
-	if (!tzp || !tzp->tbp)
-		goto exit;
-
 	list_for_each_entry(pos, &thermal_cdev_list, node) {
-		for (i = 0; i < tzp->num_tbps; i++) {
-			if (tzp->tbp[i].cdev || !tzp->tbp[i].match)
-				continue;
-			if (tzp->tbp[i].match(tz, pos))
-				continue;
-			tzp->tbp[i].cdev = pos;
-			__bind(tz, tzp->tbp[i].trip_mask, pos,
-			       tzp->tbp[i].binding_limits,
-			       tzp->tbp[i].weight);
-		}
+		ret = tz->ops->bind(tz, pos);
+		if (ret)
+			print_bind_err_msg(tz, pos, ret);
 	}
-exit:
+
 	mutex_unlock(&thermal_list_lock);
 }
 
@@ -1491,15 +1399,13 @@ EXPORT_SYMBOL_GPL(thermal_zone_device_id);
  */
 void thermal_zone_device_unregister(struct thermal_zone_device *tz)
 {
-	int i, tz_id;
-	const struct thermal_zone_params *tzp;
+	int tz_id;
 	struct thermal_cooling_device *cdev;
 	struct thermal_zone_device *pos = NULL;
 
 	if (!tz)
 		return;
 
-	tzp = tz->tzp;
 	tz_id = tz->id;
 
 	mutex_lock(&thermal_list_lock);
@@ -1514,22 +1420,9 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
 	list_del(&tz->node);
 
 	/* Unbind all cdevs associated with 'this' thermal zone */
-	list_for_each_entry(cdev, &thermal_cdev_list, node) {
-		if (tz->ops->unbind) {
+	list_for_each_entry(cdev, &thermal_cdev_list, node)
+		if (tz->ops->unbind)
 			tz->ops->unbind(tz, cdev);
-			continue;
-		}
-
-		if (!tzp || !tzp->tbp)
-			break;
-
-		for (i = 0; i < tzp->num_tbps; i++) {
-			if (tzp->tbp[i].cdev == cdev) {
-				__unbind(tz, tzp->tbp[i].trip_mask, cdev);
-				tzp->tbp[i].cdev = NULL;
-			}
-		}
-	}
 
 	mutex_unlock(&thermal_list_lock);
 
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index fef625f799ae..ab7460bfdcf6 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -207,41 +207,6 @@ struct thermal_governor {
 	struct list_head	governor_list;
 };
 
-/* Structure that holds binding parameters for a zone */
-struct thermal_bind_params {
-	struct thermal_cooling_device *cdev;
-
-	/*
-	 * This is a measure of 'how effectively these devices can
-	 * cool 'this' thermal zone. It shall be determined by
-	 * platform characterization. This value is relative to the
-	 * rest of the weights so a cooling device whose weight is
-	 * double that of another cooling device is twice as
-	 * effective. See Documentation/driver-api/thermal/sysfs-api.rst for more
-	 * information.
-	 */
-	int weight;
-
-	/*
-	 * This is a bit mask that gives the binding relation between this
-	 * thermal zone and cdev, for a particular trip point.
-	 * See Documentation/driver-api/thermal/sysfs-api.rst for more information.
-	 */
-	int trip_mask;
-
-	/*
-	 * This is an array of cooling state limits. Must have exactly
-	 * 2 * thermal_zone.number_of_trip_points. It is an array consisting
-	 * of tuples <lower-state upper-state> of state limits. Each trip
-	 * will be associated with one state limit tuple when binding.
-	 * A NULL pointer means <THERMAL_NO_LIMITS THERMAL_NO_LIMITS>
-	 * on all trips.
-	 */
-	unsigned long *binding_limits;
-	int (*match) (struct thermal_zone_device *tz,
-			struct thermal_cooling_device *cdev);
-};
-
 /* Structure to define Thermal Zone parameters */
 struct thermal_zone_params {
 	char governor_name[THERMAL_NAME_LENGTH];
@@ -253,9 +218,6 @@ struct thermal_zone_params {
 	 */
 	bool no_hwmon;
 
-	int num_tbps;	/* Number of tbp entries */
-	struct thermal_bind_params *tbp;
-
 	/*
 	 * Sustainable power (heat) that this thermal zone can dissipate in
 	 * mW
-- 
2.25.1

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