net: of_mdio: add of_mdiobus_link_phydev()

Add a function to walk the list of subnodes of a mdio bus and look for
a node that matches the phy's address with its 'reg' property. If found,
set the of_node pointer for the phy. This allows auto-probed pyh
devices to be augmented by information passed in via DT.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index a6284964b711..2e58aa54484c 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -300,6 +300,12 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
         if (IS_ERR(phydev) || phydev == NULL)
                 return phydev;
 
+        /*
+         * For DT, see if the auto-probed phy has a correspoding child
+         * in the bus node, and set the of_node pointer in this case.
+         */
+        of_mdiobus_link_phydev(bus, phydev);
+
         err = phy_device_register(phydev);
         if (err) {
                 phy_device_free(phydev);