phylib: Work around bug in Teranetics PHY

The Teranetics PHY does not properly report the link state
for fiber connections. The new PHY code actually checked the link,
and so the FM driver would refuse to talk over a linkless PHY.

But the link may actually be up, so now we always report it as up
for fiber connections on the tn2020.

Signed-off-by: Andy Fleming <afleming@freescale.com>

drivers/net/phy/teranetics.c

@@ -41,6 +41,25 @@ int tn2020_config(struct phy_device *phydev)
 	return 0;
 }
 
+int tn2020_startup(struct phy_device *phydev)
+{
+	if (phydev->port != PORT_FIBRE)
+		return gen10g_startup(phydev);
+
+	/*
+	 * The TN2020 only pretends to support fiber.
+	 * It works, but it doesn't look like it works,
+	 * so the link status reports no link.
+	 */
+	phydev->link = 1;
+
+	/* For now just lie and say it's 10G all the time */
+	phydev->speed = SPEED_10000;
+	phydev->duplex = DUPLEX_FULL;
+
+	return 0;
+}
+
 struct phy_driver tn2020_driver = {
 	.name = "Teranetics TN2020",
 	.uid = 0x00a19410,
@@ -50,7 +69,7 @@ struct phy_driver tn2020_driver = {
 			MDIO_DEVS_PHYXS | MDIO_DEVS_AN |
 			MDIO_DEVS_VEND1 | MDIO_DEVS_VEND2),
 	.config = &tn2020_config,
-	.startup = &gen10g_startup,
+	.startup = &tn2020_startup,
 	.shutdown = &gen10g_shutdown,
 };