diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c
index 9810aaa..a215560 100644
--- a/drivers/hwmon/adt7470.c
+++ b/drivers/hwmon/adt7470.c
@@ -114,8 +114,6 @@
 /* sleep 1s while gathering temperature data */
 #define TEMP_COLLECTION_TIME	1000
 
-#define power_of_2(x)	(((x) & ((x) - 1)) == 0)
-
 /* datasheet says to divide this number by the fan reading to get fan rpm */
 #define FAN_PERIOD_TO_RPM(x)	((90000 * 60) / (x))
 #define FAN_RPM_TO_PERIOD	FAN_PERIOD_TO_RPM
@@ -677,7 +675,7 @@
 {
 	if (input == ADT7470_PWM_ALL_TEMPS)
 		return 0;
-	if (input < 1 || !power_of_2(input))
+	if (input < 1 || !is_power_of_2(input))
 		return -EINVAL;
 	return ilog2(input) + 1;
 }