Revert "drivers: thermal: step_wise: add support for hysteresis"

This reverts commit cef4ba0.

Author: popcornmix

drivers/thermal/gov_step_wise.c

@@ -17,11 +17,11 @@
 #include "thermal_core.h"
 
 /*
- * If the temperature is higher than a hysteresis temperature,
+ * If the temperature is higher than a trip point,
  *    a. if the trend is THERMAL_TREND_RAISING, use higher cooling
  *       state for this trip point
  *    b. if the trend is THERMAL_TREND_DROPPING, do nothing
- * If the temperature is lower than a hysteresis temperature,
+ * If the temperature is lower than a trip point,
  *    a. if the trend is THERMAL_TREND_RAISING, do nothing
  *    b. if the trend is THERMAL_TREND_DROPPING, use lower cooling
  *       state for this trip point, if the cooling state already
@@ -74,35 +74,19 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz,
 	int trip_id = thermal_zone_trip_id(tz, trip);
 	struct thermal_instance *instance;
 	bool throttle = false;
-	int hyst_temp;
 
 	if (tz->temperature >= trip_threshold) {
 		throttle = true;
 		trace_thermal_zone_trip(tz, trip_id, trip->type);
 	}
 
-	hyst_temp = trip->temperature - trip->hysteresis;
-
-	dev_dbg(&tz->device,
-		"Trip%d[type=%d,temp=%d,hyst=%d]:trend=%d,throttle=%d\n",
-		trip_id, trip->type, trip->temperature, hyst_temp, trend, throttle);
+	dev_dbg(&tz->device, "Trip%d[type=%d,temp=%d]:trend=%d,throttle=%d\n",
+		trip_id, trip->type, trip_threshold, trend, throttle);
 
 	list_for_each_entry(instance, &td->thermal_instances, trip_node) {
 		int old_target;
 
 		old_target = instance->target;
-		throttle = false;
-		/*
-		 * Lower the mitigation only if the temperature
-		 * goes below the hysteresis temperature.
-		 */
-		if (tz->temperature >= trip->temperature ||
-		   (tz->temperature >= hyst_temp &&
-		   old_target == instance->upper)) {
-			throttle = true;
-			trace_thermal_zone_trip(tz, trip_id, trip->type);
-		}
-
 		instance->target = get_target_state(instance, trend, throttle);
 
 		dev_dbg(&instance->cdev->device, "old_target=%d, target=%ld\n",