net: dsa: felix: convert TAS link speed based on phylink speed

state->speed holds a value of 10, 100, 1000 or 2500, but
QSYS_TAG_CONFIG_LINK_SPEED expects a value of 0, 1, 2, 3. So convert the
speed to a proper value.

Fixes: de143c0e ("net: dsa: felix: Configure Time-Aware Scheduler via taprio offload")
Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/ocelot/felix_vsc9959.c

@@ -1284,8 +1284,28 @@ void vsc9959_mdio_bus_free(struct ocelot *ocelot)
 static void vsc9959_sched_speed_set(struct ocelot *ocelot, int port,
 				    u32 speed)
 {
+	u8 tas_speed;
+
+	switch (speed) {
+	case SPEED_10:
+		tas_speed = OCELOT_SPEED_10;
+		break;
+	case SPEED_100:
+		tas_speed = OCELOT_SPEED_100;
+		break;
+	case SPEED_1000:
+		tas_speed = OCELOT_SPEED_1000;
+		break;
+	case SPEED_2500:
+		tas_speed = OCELOT_SPEED_2500;
+		break;
+	default:
+		tas_speed = OCELOT_SPEED_1000;
+		break;
+	}
+
 	ocelot_rmw_rix(ocelot,
-		       QSYS_TAG_CONFIG_LINK_SPEED(speed),
+		       QSYS_TAG_CONFIG_LINK_SPEED(tas_speed),
 		       QSYS_TAG_CONFIG_LINK_SPEED_M,
 		       QSYS_TAG_CONFIG, port);
 }