diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index e0e6f85966e1..af3bc65c4595 100644
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -218,6 +218,19 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
 					break;
 				}
 			}
+			if (perout->flags & PTP_PEROUT_PHASE) {
+				/*
+				 * The phase should be specified modulo the
+				 * period, therefore anything equal or larger
+				 * than 1 period is invalid.
+				 */
+				if (perout->phase.sec > perout->period.sec ||
+				    (perout->phase.sec == perout->period.sec &&
+				     perout->phase.nsec >= perout->period.nsec)) {
+					err = -ERANGE;
+					break;
+				}
+			}
 		} else if (cmd == PTP_PEROUT_REQUEST) {
 			req.perout.flags &= PTP_PEROUT_V1_VALID_FLAGS;
 			req.perout.rsv[0] = 0;