thermal/drivers/armada: Use the thermal_zone_get_crit_temp()

The driver browses the trip point to find out the critical trip
temperature. However the function thermal_zone_get_crit_temp() does
already that, so the routine is pointless in the driver.

Use thermal_zone_get_crit_temp() instead of inspecting all the trip
points.

In addition, the hysteresis value is set to zero. A critical trip
point does not have a hysteresis.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230118222610.186088-1-daniel.lezcano@linaro.org

drivers/thermal/armada_thermal.c

@@ -782,34 +782,26 @@ static int armada_configure_overheat_int(struct armada_thermal_priv *priv,
 					 int sensor_id)
 {
 	/* Retrieve the critical trip point to enable the overheat interrupt */
-	struct thermal_trip trip;
+	int temperature;
 	int ret;
-	int i;
 
-	for (i = 0; i < thermal_zone_get_num_trips(tz); i++) {
+	ret = thermal_zone_get_crit_temp(tz, &temperature);
+	if (ret)
+		return ret;
 
-		ret = thermal_zone_get_trip(tz, i, &trip);
-		if (ret)
-			return ret;
+	ret = armada_select_channel(priv, sensor_id);
+	if (ret)
+		return ret;
 
-		if (trip.type != THERMAL_TRIP_CRITICAL)
-			continue;
+	/*
+	 * A critical temperature does not have a hysteresis
+	 */
+	armada_set_overheat_thresholds(priv, temperature, 0);
+	priv->overheat_sensor = tz;
+	priv->interrupt_source = sensor_id;
+	armada_enable_overheat_interrupt(priv);
 
-		ret = armada_select_channel(priv, sensor_id);
-		if (ret)
-			return ret;
-
-		armada_set_overheat_thresholds(priv, trip.temperature,
-					       trip.hysteresis);
-		priv->overheat_sensor = tz;
-		priv->interrupt_source = sensor_id;
-
-		armada_enable_overheat_interrupt(priv);
-
-		return 0;
-	}
-
-	return -EINVAL;
+	return 0;
 }
 
 static int armada_thermal_probe(struct platform_device *pdev)