diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c
index 36d0729..5e820b5 100644
--- a/drivers/thermal/hisi_thermal.c
+++ b/drivers/thermal/hisi_thermal.c
@@ -68,12 +68,12 @@
 	 * Every step equals (1 * 200) / 255 celsius, and finally
 	 * need convert to millicelsius.
 	 */
-	return (HISI_TEMP_BASE + (step * 200 / 255)) * 1000;
+	return (HISI_TEMP_BASE * 1000 + (step * 200000 / 255));
 }
 
 static inline long _temp_to_step(long temp)
 {
-	return ((temp / 1000 - HISI_TEMP_BASE) * 255 / 200);
+	return ((temp - HISI_TEMP_BASE * 1000) * 255) / 200000;
 }
 
 static long hisi_thermal_get_sensor_temp(struct hisi_thermal_data *data,
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index f1db496..5133cd1 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -959,7 +959,7 @@
 	struct thermal_zone_device *tz = to_thermal_zone(dev);		\
 									\
 	if (tz->tzp)							\
-		return sprintf(buf, "%u\n", tz->tzp->name);		\
+		return sprintf(buf, "%d\n", tz->tzp->name);		\
 	else								\
 		return -EIO;						\
 	}								\