net: dsa: sja1105: cache the phy-mode port property

So far we've succeeded in operating without keeping a copy of the
phy-mode in the driver, since we already have the static config and we
can look at the xMII Mode Parameters Table which already holds that
information.

But with the SJA1110, we cannot make the distinction between sgmii and
2500base-x, because to the hardware's static config, it's all SGMII.
So add a phy_mode property per port inside struct sja1105_private.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/sja1105/sja1105.h

@@ -210,6 +210,7 @@ struct sja1105_private {
 	struct sja1105_static_config static_config;
 	bool rgmii_rx_delay[SJA1105_MAX_NUM_PORTS];
 	bool rgmii_tx_delay[SJA1105_MAX_NUM_PORTS];
+	phy_interface_t phy_mode[SJA1105_MAX_NUM_PORTS];
 	bool best_effort_vlan_filtering;
 	unsigned long learn_ena;
 	unsigned long ucast_egress_floods;

drivers/net/dsa/sja1105/sja1105_main.c

@@ -871,6 +871,8 @@ static int sja1105_parse_ports_node(struct sja1105_private *priv,
 			ports[index].role = XMII_MAC;
 		else if (of_property_read_bool(child, "sja1105,role-phy"))
 			ports[index].role = XMII_PHY;
+
+		priv->phy_mode[index] = phy_mode;
 	}
 
 	return 0;
@@ -1081,27 +1083,7 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 static bool sja1105_phy_mode_mismatch(struct sja1105_private *priv, int port,
 				      phy_interface_t interface)
 {
-	struct sja1105_xmii_params_entry *mii;
-	sja1105_phy_interface_t phy_mode;
-
-	mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
-	phy_mode = mii->xmii_mode[port];
-
-	switch (interface) {
-	case PHY_INTERFACE_MODE_MII:
-		return (phy_mode != XMII_MODE_MII);
-	case PHY_INTERFACE_MODE_RMII:
-		return (phy_mode != XMII_MODE_RMII);
-	case PHY_INTERFACE_MODE_RGMII:
-	case PHY_INTERFACE_MODE_RGMII_ID:
-	case PHY_INTERFACE_MODE_RGMII_RXID:
-	case PHY_INTERFACE_MODE_RGMII_TXID:
-		return (phy_mode != XMII_MODE_RGMII);
-	case PHY_INTERFACE_MODE_SGMII:
-		return (phy_mode != XMII_MODE_SGMII);
-	default:
-		return true;
-	}
+	return priv->phy_mode[port] != interface;
 }
 
 static void sja1105_mac_config(struct dsa_switch *ds, int port,