Merge branch 'mv88e6xxx-Support-more-SERDES-interfacxes'

Andrew Lunn says:

====================
net: dsa: mv88e6xxx: Support more SERDES interfacxes

Currently the SERDES interfaces for ports 9 and 10 on the mv88e6390x
are supported, allowing upto 10G. However, when unused, these SERDES
interfaces can be used by some of the lower ports for 1000Base-X.

The tricky bit here is ordering. The SERDES have to become free from
ports 9 or 10 before they can be used with lower ports. Normally, this
would happen only when these ports would be configured up, which is
too late. So at probe time, defaulting ports 9 and 10 to 1000BaseX
frees them for use with lower ports. If they are actually needed, they
will be taken back when port 9 and 10 goes up.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 3 deletions

diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c
index cd7db60a508b..ebd26b6a93e6 100644
--- a/drivers/net/dsa/mv88e6xxx/port.c
+++ b/drivers/net/dsa/mv88e6xxx/port.c
@@ -368,12 +368,15 @@ int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
 	u16 reg;
 	int err;
 
-	if (mode == PHY_INTERFACE_MODE_NA)
-		return 0;
-
 	if (port != 9 && port != 10)
 		return -EOPNOTSUPP;
 
+	/* Default to a slow mode, so freeing up SERDES interfaces for
+	 * other ports which might use them for SFPs.
+	 */
+	if (mode == PHY_INTERFACE_MODE_NA)
+		mode = PHY_INTERFACE_MODE_1000BASEX;
+
 	switch (mode) {
 	case PHY_INTERFACE_MODE_1000BASEX:
 		cmode = MV88E6XXX_PORT_STS_CMODE_1000BASE_X;
@@ -437,6 +440,21 @@ int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
 	return 0;
 }
 
+int mv88e6390_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
+			     phy_interface_t mode)
+{
+	switch (mode) {
+	case PHY_INTERFACE_MODE_XGMII:
+	case PHY_INTERFACE_MODE_XAUI:
+	case PHY_INTERFACE_MODE_RXAUI:
+		return -EINVAL;
+	default:
+		break;
+	}
+
+	return mv88e6390x_port_set_cmode(chip, port, mode);
+}
+
 int mv88e6185_port_get_cmode(struct mv88e6xxx_chip *chip, int port, u8 *cmode)
 {
 	int err;