thermal: qcom: Use thermal_zone_get_crit_temp() in qpnp_tm_init()

Modify qpnp_tm_init() to use thermal_zone_get_crit_temp() to get the
critical trip temperature instead of iterating over trip indices and
using thermal_zone_get_trip() to get a struct thermal_trip pointer
from a trip index until it finds the critical one.

Signed-off-by: Rafael J. Wysocki <[e-mail]>
Reviewed-by: Lukasz Luba <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

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

···
 	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
···
 
 	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);