ramips: handle mdio address and switch port seperate

The phy handling code forces a phy mdio address and the switch port to
which a phy is attached to be the same. Albeit such a configuration is
used for most boards, it isn't for all.

Pass the switch port number to the ethernet phy connect functions, to
ensure the correct list entry is edited and not the list entry that
matches th phys mdio address.

Use the mdio address with mdiobus_get_phy instead of the port number,
to make sure the expected ethernet phy gets connected.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/mdio.c

@@ -60,19 +60,19 @@ static void fe_phy_link_adjust(struct net_device *dev)
 	spin_unlock_irqrestore(&priv->phy->lock, flags);
 }
 
-int fe_connect_phy_node(struct fe_priv *priv, struct device_node *phy_node)
+int fe_connect_phy_node(struct fe_priv *priv, struct device_node *phy_node, int port)
 {
-	const __be32 *_port = NULL;
+	const __be32 *_phy_addr = NULL;
 	struct phy_device *phydev;
-	int phy_mode, port;
+	int phy_mode;
 
-	_port = of_get_property(phy_node, "reg", NULL);
+	_phy_addr = of_get_property(phy_node, "reg", NULL);
 
-	if (!_port || (be32_to_cpu(*_port) >= 0x20)) {
-		pr_err("%s: invalid port id\n", phy_node->name);
+	if (!_phy_addr || (be32_to_cpu(*_phy_addr) >= 0x20)) {
+		pr_err("%s: invalid phy id\n", phy_node->name);
 		return -EINVAL;
 	}
-	port = be32_to_cpu(*_port);
+
 	phy_mode = of_get_phy_mode(phy_node);
 	if (phy_mode < 0) {
 		dev_err(priv->dev, "incorrect phy-mode %d\n", phy_mode);

target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/mdio.h

@@ -19,7 +19,8 @@
 int fe_mdio_init(struct fe_priv *priv);
 void fe_mdio_cleanup(struct fe_priv *priv);
 int fe_connect_phy_node(struct fe_priv *priv,
-			struct device_node *phy_node);
+			struct device_node *phy_node,
+			int port);
 #else
 static inline int fe_mdio_init(struct fe_priv *priv) { return 0; }
 static inline void fe_mdio_cleanup(struct fe_priv *priv) {}

target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/mdio_rt2880.c

@@ -218,5 +218,5 @@ void rt2880_port_init(struct fe_priv *priv, struct device_node *np)
 	}
 
 	if (priv->phy->phy_node[0] && mdiobus_get_phy(priv->mii_bus, 0))
-		fe_connect_phy_node(priv, priv->phy->phy_node[0]);
+		fe_connect_phy_node(priv, priv->phy->phy_node[0], 0);
 }

target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/soc_mt7620.c

@@ -140,6 +140,7 @@ static void mt7620_port_init(struct fe_priv *priv, struct device_node *np)
 {
 	struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
 	const __be32 *_id = of_get_property(np, "reg", NULL);
+	const __be32 *phy_addr;
 	int phy_mode, size, id;
 	int shift = 12;
 	u32 val, mask = 0;
@@ -234,12 +235,13 @@ static void mt7620_port_init(struct fe_priv *priv, struct device_node *np)
 		return;
 	}
 
-	if (priv->phy->phy_node[id] && mdiobus_get_phy(priv->mii_bus, id)) {
+	phy_addr = of_get_property(priv->phy->phy_node[id], "reg", NULL);
+	if (phy_addr && mdiobus_get_phy(priv->mii_bus, be32_to_cpup(phy_addr))) {
 		u32 val = PMCR_BACKPRES | PMCR_BACKOFF | PMCR_RX_EN |
 			PMCR_TX_EN |  PMCR_MAC_MODE | PMCR_IPG;
 
 		mtk_switch_w32(gsw, val, GSW_REG_PORT_PMCR(id));
-		fe_connect_phy_node(priv, priv->phy->phy_node[id]);
+		fe_connect_phy_node(priv, priv->phy->phy_node[id], id);
 		gsw->autopoll |= BIT(id);
 		mt7620_auto_poll(gsw);
 		return;