of_mdio / mdiobus: ensure mdio devices have fwnode correctly populated

Ensure that all mdio devices populate the struct device fwnode pointer
as well as the of_node pointer to allow drivers that wish to use
fwnode APIs to work.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/of/of_mdio.c

@@ -81,6 +81,7 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio,
 	 * can be looked up later */
 	of_node_get(child);
 	phy->mdio.dev.of_node = child;
+	phy->mdio.dev.fwnode = of_fwnode_handle(child);
 
 	/* All data is now stored in the phy struct;
 	 * register it */
@@ -111,6 +112,7 @@ static int of_mdiobus_register_device(struct mii_bus *mdio,
 	 */
 	of_node_get(child);
 	mdiodev->dev.of_node = child;
+	mdiodev->dev.fwnode = of_fwnode_handle(child);
 
 	/* All data is now stored in the mdiodev struct; register it. */
 	rc = mdio_device_register(mdiodev);
@@ -206,6 +208,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
 	mdio->phy_mask = ~0;
 
 	mdio->dev.of_node = np;
+	mdio->dev.fwnode = of_fwnode_handle(np);
 
 	/* Get bus level PHY reset GPIO details */
 	mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;