net: sysfs: Document "phydev" symbolic link

Now that we link the network device to its PHY device, document this
sysfs symbolic link.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/ABI/testing/sysfs-class-net b/Documentation/ABI/testing/sysfs-class-net
index 668604fc8e062bc7d7d4fc363aec6db48b00d6e8..6856da99b6f73b317eb2be31bc8194d28fa161ab 100644 (file)
--- a/Documentation/ABI/testing/sysfs-class-net
+++ b/Documentation/ABI/testing/sysfs-class-net
@@ -251,3 +251,11 @@ Contact:   netdev@vger.kernel.org
 Description:
                Indicates the unique physical switch identifier of a switch this
                port belongs to, as a string.
+
+What:          /sys/class/net/<iface>/phydev
+Date:          May 2017
+KernelVersion: 4.13
+Contact:       netdev@vger.kernel.org
+Description:
+               Symbolic link to the PHY device this network device is attached
+               to.