diff --git a/drivers/ptp/ptp_sysfs.c b/drivers/ptp/ptp_sysfs.c
index 302e626fe6b01777523c371e2760ee8f48acc68b..53d43954a9740a5520229a1e8798516805a73c19 100644
--- a/drivers/ptp/ptp_sysfs.c
+++ b/drivers/ptp/ptp_sysfs.c
@@ -28,7 +28,7 @@ static ssize_t clock_name_show(struct device *dev,
 	struct ptp_clock *ptp = dev_get_drvdata(dev);
 	return snprintf(page, PAGE_SIZE-1, "%s\n", ptp->info->name);
 }
-static DEVICE_ATTR(clock_name, 0444, clock_name_show, NULL);
+static DEVICE_ATTR_RO(clock_name);
 
 #define PTP_SHOW_INT(name, var)						\
 static ssize_t var##_show(struct device *dev,				\