Documentation: net: phy: improve explanation when to specify the PHY ID
authorMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Sun, 22 Jan 2017 16:41:32 +0000 (17:41 +0100)
committerDavid S. Miller <davem@davemloft.net>
Tue, 24 Jan 2017 18:31:02 +0000 (13:31 -0500)
commit7630ea4bda18df2ee1c64dfdca1724a9cc32f920
treeebb096b59a04490bf57ee7af007cb41af8a5fbab
parentf39aac7e839368e3895dff952f3bfa0a22e20060
Documentation: net: phy: improve explanation when to specify the PHY ID

The old description basically read like "ethernet-phy-idAAAA.BBBB" can
be specified when you know the actual PHY ID. However, specifying this
has a side-effect: it forces Linux to bind to a certain PHY driver (the
one that matches the ID given in the compatible string), ignoring the ID
which is reported by the actual PHY.
Whenever a device is shipped with (multiple) different PHYs during it's
production lifetime then explicitly specifying
"ethernet-phy-idAAAA.BBBB" could break certain revisions of that device.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Documentation/devicetree/bindings/net/phy.txt