+void thermal_zone_set_trips(struct thermal_zone_device *tz)
+{
+ int low = -INT_MAX;
+ int high = INT_MAX;
+ int trip_temp, hysteresis;
+ int i, ret;
+
+ mutex_lock(&tz->lock);
+
+ if (!tz->ops->set_trips || !tz->ops->get_trip_hyst)
+ goto exit;
+
+ for (i = 0; i < tz->trips; i++) {
+ int trip_low;
+
+ tz->ops->get_trip_temp(tz, i, &trip_temp);
+ tz->ops->get_trip_hyst(tz, i, &hysteresis);
+
+ trip_low = trip_temp - hysteresis;
+
+ if (trip_low < tz->temperature && trip_low > low)
+ low = trip_low;
+
+ if (trip_temp > tz->temperature && trip_temp < high)
+ high = trip_temp;
+ }
+
+ /* No need to change trip points */
+ if (tz->prev_low_trip == low && tz->prev_high_trip == high)
+ goto exit;
+
+ tz->prev_low_trip = low;
+ tz->prev_high_trip = high;
+
+ dev_dbg(&tz->device,
+ "new temperature boundaries: %d < x < %d\n", low, high);
+
+ /*
+ * Set a temperature window. When this window is left the driver
+ * must inform the thermal core via thermal_zone_device_update.
+ */
+ ret = tz->ops->set_trips(tz, low, high);
+ if (ret)
+ dev_err(&tz->device, "Failed to set trips: %d\n", ret);
+
+exit:
+ mutex_unlock(&tz->lock);
+}
+EXPORT_SYMBOL_GPL(thermal_zone_set_trips);
+