1 files changed, 8 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-class-net b/Documentation/ABI/testing/sysfs-class-net
index d922060e455d..416c5d59f52e 100644
--- a/Documentation/ABI/testing/sysfs-class-net
+++ b/Documentation/ABI/testing/sysfs-class-net
@@ -169,6 +169,14 @@ Description:
                 "unknown", "notpresent", "down", "lowerlayerdown", "testing",
                 "dormant", "up".
 
+What:           /sys/class/net/<iface>/phys_port_id
+Date:           July 2013
+KernelVersion:  3.12
+Contact:        netdev@vger.kernel.org
+Description:
+                Indicates the interface unique physical port identifier within
+                the NIC, as a string.
+
 What:           /sys/class/net/<iface>/speed
 Date:           October 2009
 KernelVersion:  2.6.33