[PATCH v1 1/3] net: stmmac: allow drivers to explicitly select PHY device

[James Hilliard <james.hilliard1@gmail.com>]

Some devices like the Allwinner H616 need the ability to select a phy
in cases where multiple PHY's may be present in a device tree due to
needing the ability to support multiple SoC variants with runtime
PHY selection.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
---
 .../net/ethernet/stmicro/stmmac/stmmac_main.c | 22 +++++++++++++------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 59d07d0d3369..949c4a8a1456 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1210,17 +1210,25 @@ static int stmmac_init_phy(struct net_device *dev)
 	 */
 	if (!phy_fwnode || IS_ERR(phy_fwnode)) {
 		int addr = priv->plat->phy_addr;
-		struct phy_device *phydev;
+		struct phy_device *phydev = NULL;
 
-		if (addr < 0) {
-			netdev_err(priv->dev, "no phy found\n");
-			return -ENODEV;
+		if (priv->plat->phy_node) {
+			phy_fwnode = of_fwnode_handle(priv->plat->phy_node);
+			phydev = fwnode_phy_find_device(phy_fwnode);
+			fwnode_handle_put(phy_fwnode);
 		}
 
-		phydev = mdiobus_get_phy(priv->mii, addr);
 		if (!phydev) {
-			netdev_err(priv->dev, "no phy at addr %d\n", addr);
-			return -ENODEV;
+			if (addr < 0) {
+				netdev_err(priv->dev, "no phy found\n");
+				return -ENODEV;
+			}
+
+			phydev = mdiobus_get_phy(priv->mii, addr);
+			if (!phydev) {
+				netdev_err(priv->dev, "no phy at addr %d\n", addr);
+				return -ENODEV;
+			}
 		}
 
 		ret = phylink_connect_phy(priv->phylink, phydev);
-- 
2.34.1