@@ -196,19 +196,31 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
 			break;
 		}
 		pct = &sysoff->ts[0];
-		for (i = 0; i < sysoff->n_samples; i++) {
-			getnstimeofday64(&ts);
+		if (ptp->info->getsynctime64 && sysoff->n_samples == 1) {
+			ptp->info->getsynctime64(ptp->info, &ts, &systs);
+			pct->sec = systs.tv_sec;
+			pct->nsec = systs.tv_nsec;
+			++pct;

 			pct->sec = ts.tv_sec;
 			pct->nsec = ts.tv_nsec;
-			pct++;
-			ptp->info->gettime64(ptp->info, &ts);
+			++pct;
+			pct->sec = systs.tv_sec;
+			pct->nsec = systs.tv_nsec;
+		} else {
+			for (i = 0; i < sysoff->n_samples; i++) {
+				getnstimeofday64(&ts);
+				pct->sec = ts.tv_sec;
+				pct->nsec = ts.tv_nsec;
+				pct++;
+				ptp->info->gettime64(ptp->info, &ts);
+				pct->sec = ts.tv_sec;
+				pct->nsec = ts.tv_nsec;
+				pct++;
+			}
+			getnstimeofday64(&ts);
 			pct->sec = ts.tv_sec;
 			pct->nsec = ts.tv_nsec;
-			pct++;
 		}
-		getnstimeofday64(&ts);
-		pct->sec = ts.tv_sec;
-		pct->nsec = ts.tv_nsec;
 		if (copy_to_user((void __user *)arg, sysoff, sizeof(*sysoff)))
 			err = -EFAULT;
 		break;

diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index b8b7306..edff9a5 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h

@@ -105,6 +105,9 @@ struct ptp_clock_info {
 	int (*adjfreq)(struct ptp_clock_info *ptp, s32 delta);
 	int (*adjtime)(struct ptp_clock_info *ptp, s64 delta);
 	int (*gettime64)(struct ptp_clock_info *ptp, struct timespec64 *ts);
+	int (*getsynctime64)
+		(struct ptp_clock_info *ptp, struct timespec64 *dev,
+		 struct timespec64 *sys);