[PATCH v7 4/4] doc/guides: add PTP IDPF documentation

[Soumyadeep Hore <soumyadeep.hore@intel.com>]

Updates the IDPF Documentation with PTP feature.

Signed-off-by: Soumyadeep Hore <soumyadeep.hore@intel.com>
Acked-by: Rajesh Kumar <rajesh3.kumar@intel.com>
---
 doc/guides/nics/features/idpf.ini      |  1 +
 doc/guides/nics/idpf.rst               | 15 +++++++++++++++
 doc/guides/rel_notes/release_26_03.rst |  4 ++++
 3 files changed, 20 insertions(+)

diff --git a/doc/guides/nics/features/idpf.ini b/doc/guides/nics/features/idpf.ini
index 63b799289a..f546648924 100644
--- a/doc/guides/nics/features/idpf.ini
+++ b/doc/guides/nics/features/idpf.ini
@@ -19,6 +19,7 @@ RSS reta update      = Y
 L3 checksum offload  = P
 L4 checksum offload  = P
 Timestamp offload    = P
+Timesync             = Y
 Packet type parsing  = Y
 Basic stats          = Y
 Linux                = Y
diff --git a/doc/guides/nics/idpf.rst b/doc/guides/nics/idpf.rst
index b99cc18188..998c1a5dfa 100644
--- a/doc/guides/nics/idpf.rst
+++ b/doc/guides/nics/idpf.rst
@@ -109,3 +109,18 @@ The paths are chosen based on 2 conditions:
   A value "P" means the offload feature is not supported by vector path.
   If any not supported features are used, idpf vector PMD is disabled
   and the scalar paths are chosen.
+
+  Time Synchronization
+  ~~~~~~~~~~~~~~~~~~~~
+
+  The system operator can run a PTP (Precision Time Protocol) client application
+  to synchronize the time on the network card in ACC
+  (and optionally the time on the system) to the PTP primary.
+
+  IDPF PMD supports PTP client applications that use the DPDK IEEE 1588 API
+  to communicate with the PTP primary clock.
+  Note that PTP client application needs to run on PF in ACC.
+
+  .. code-block:: console
+
+    examples/dpdk-ptpclient -l 0-3 -n 3 -a 0000:ec:00.1 -- -T 1 -p 0x1
diff --git a/doc/guides/rel_notes/release_26_03.rst b/doc/guides/rel_notes/release_26_03.rst
index afdf1af06c..16b5a0b0b1 100644
--- a/doc/guides/rel_notes/release_26_03.rst
+++ b/doc/guides/rel_notes/release_26_03.rst
@@ -63,6 +63,10 @@ New Features
 
   * The timestamp value has been updated to make it usable.
 
+* **Updated Intel idpf ethernet driver.**
+
+  * Added support for time sync features.
+
 * **Updated Intel iavf driver.**
 
   * Added support for pre and post VF reset callbacks.
-- 
2.47.1