net: dsa: mv88e6xxx: add port priority override op

Add a new operation to disable the DA, SA and VTU priority override.

Setting such limit is not likely to be used soon, so provide a
port_disable_pri_override operation directly. This can be changed later
for port_set_pri_override when we'll need it.

Also remove the now obsolete mv88e6xxx_6320_family helper.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/mv88e6xxx.h

@@ -872,6 +872,7 @@ struct mv88e6xxx_ops {
 	int (*port_egress_rate_limiting)(struct mv88e6xxx_chip *chip, int port);
 	int (*port_pause_config)(struct mv88e6xxx_chip *chip, int port);
 	int (*port_disable_learn_limit)(struct mv88e6xxx_chip *chip, int port);
+	int (*port_disable_pri_override)(struct mv88e6xxx_chip *chip, int port);
 
 	/* CMODE control what PHY mode the MAC will use, eg. SGMII, RGMII, etc.
 	 * Some chips allow this to be configured on specific ports.

drivers/net/dsa/mv88e6xxx/port.c

@@ -812,6 +812,13 @@ int mv88e6xxx_port_disable_learn_limit(struct mv88e6xxx_chip *chip, int port)
 	return mv88e6xxx_port_write(chip, port, PORT_ATU_CONTROL, 0);
 }
 
+/* Offset 0x0D: (Priority) Override Register */
+
+int mv88e6xxx_port_disable_pri_override(struct mv88e6xxx_chip *chip, int port)
+{
+	return mv88e6xxx_port_write(chip, port, PORT_PRI_OVERRIDE, 0);
+}
+
 /* Offset 0x0f: Port Ether type */
 
 int mv88e6351_port_set_ether_type(struct mv88e6xxx_chip *chip, int port,

drivers/net/dsa/mv88e6xxx/port.h

@@ -77,5 +77,6 @@ int mv88e6095_port_set_upstream_port(struct mv88e6xxx_chip *chip, int port,
 				     int upstream_port);
 
 int mv88e6xxx_port_disable_learn_limit(struct mv88e6xxx_chip *chip, int port);
+int mv88e6xxx_port_disable_pri_override(struct mv88e6xxx_chip *chip, int port);
 
 #endif /* _MV88E6XXX_PORT_H */