From 5e5adbea0ce88caac7d164317606758399e1b8f3 Mon Sep 17 00:00:00 2001
From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Wed, 22 Nov 2023 09:51:14 +0100
Subject: [PATCH] doc: update description of NTP over PTP in FAQ

---
 doc/faq.adoc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/doc/faq.adoc b/doc/faq.adoc
index 386f452..85e5657 100644
--- a/doc/faq.adoc
+++ b/doc/faq.adoc
@@ -651,7 +651,10 @@ The `ethtool -T` command can be used to verify the timestamping support.
 As an experimental feature added in version 4.2, `chrony` can use PTP as a
 transport for NTP messages (NTP over PTP) to enable hardware timestamping on
 hardware which can timestamp PTP packets only. It can be enabled by the
-`ptpport` directive.
+`ptpport` directive. Since version 4.5, `chrony` can also apply corrections
+provided by PTP one-step end-to-end transparent clocks to reach the accuracy of
+ordinary PTP clocks. The application of PTP corrections can be enabled by the
+`extfield F324` option.
 
 === How can I avoid using wrong PHC refclock?