net: mscc: ocelot: make use of SerDes PHYs for handling their configuration

Previously, the SerDes muxing was hardcoded to a given mode in the MAC
controller driver. Now, the SerDes muxing is configured within the
Device Tree and is enforced in the MAC controller driver so we can have
a lot of different SerDes configurations.

Make use of the SerDes PHYs in the MAC controller to set up the SerDes
according to the SerDes<->switch port mapping and the communication mode
with the Ethernet PHY.

Signed-off-by: Quentin Schulz <quentin.schulz@bootlin.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 1a4f2bb48ead..8f11fdba8d0e 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -472,6 +472,7 @@ static int ocelot_port_open(struct net_device *dev)
 {
 	struct ocelot_port *port = netdev_priv(dev);
 	struct ocelot *ocelot = port->ocelot;
+	enum phy_mode phy_mode;
 	int err;
 
 	/* Enable receiving frames on the port, and activate auto-learning of
@@ -482,8 +483,21 @@ static int ocelot_port_open(struct net_device *dev)
 			 ANA_PORT_PORT_CFG_PORTID_VAL(port->chip_port),
 			 ANA_PORT_PORT_CFG, port->chip_port);
 
+	if (port->serdes) {
+		if (port->phy_mode == PHY_INTERFACE_MODE_SGMII)
+			phy_mode = PHY_MODE_SGMII;
+		else
+			phy_mode = PHY_MODE_QSGMII;
+
+		err = phy_set_mode(port->serdes, phy_mode);
+		if (err) {
+			netdev_err(dev, "Could not set mode of SerDes\n");
+			return err;
+		}
+	}
+
 	err = phy_connect_direct(dev, port->phy, &ocelot_port_adjust_link,
-				 PHY_INTERFACE_MODE_NA);
+				 port->phy_mode);
 	if (err) {
 		netdev_err(dev, "Could not attach to PHY\n");
 		return err;