[PATCH v3 4/4] doc: add PTP IDPF documentation

[Soumyadeep Hore]

Updated the IDPF Documentation with PTP feature.

Signed-off-by: Soumyadeep Hore <soumyadeep.hore at intel.com>
---
 doc/guides/nics/idpf.rst | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/doc/guides/nics/idpf.rst b/doc/guides/nics/idpf.rst
index b99cc18188..6e02aa3dbb 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 Synchronisation
+~~~~~~~~~~~~~~~~~~~~
+
+The system operator can run a PTP (Precision Time Protocol) client application
+to synchronise 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
-- 
2.47.1