net: dsa: mv88e6xxx: add support for MV88E6020 switch

A mv88e6250 family switch with 2 PHY and RMII ports and
no PTP support.
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -5672,6 +5672,26 @@ static const struct mv88e6xxx_ops mv88e6393x_ops = {
 };
 
 static const struct mv88e6xxx_info mv88e6xxx_table[] = {
+	[MV88E6020] = {
+		.prod_num = MV88E6XXX_PORT_SWITCH_ID_PROD_6020,
+		.family = MV88E6XXX_FAMILY_6250,
+		.name = "Marvell 88E6020",
+		.num_databases = 64,
+		.num_ports = 4,
+		.num_internal_phys = 2,
+		.max_vid = 4095,
+		.port_base_addr = 0x8,
+		.phy_base_addr = 0x0,
+		.global1_addr = 0xf,
+		.global2_addr = 0x7,
+		.age_time_coeff = 15000,
+		.g1_irqs = 9,
+		.g2_irqs = 5,
+		.atu_move_port_mask = 0xf,
+		.dual_chip = true,
+		.ops = &mv88e6250_ops,
+	},
+
 	[MV88E6085] = {
 		.prod_num = MV88E6XXX_PORT_SWITCH_ID_PROD_6085,
 		.family = MV88E6XXX_FAMILY_6097,

drivers/net/dsa/mv88e6xxx/chip.h

@@ -54,6 +54,7 @@ enum mv88e6xxx_frame_mode {
 
 /* List of supported models */
 enum mv88e6xxx_model {
+	MV88E6020,
 	MV88E6085,
 	MV88E6095,
 	MV88E6097,
@@ -95,7 +96,7 @@ enum mv88e6xxx_family {
 	MV88E6XXX_FAMILY_6097,	/* 6046 6085 6096 6097 */
 	MV88E6XXX_FAMILY_6165,	/* 6123 6161 6165 */
 	MV88E6XXX_FAMILY_6185,	/* 6108 6121 6122 6131 6152 6155 6182 6185 */
-	MV88E6XXX_FAMILY_6250,	/* 6220 6250 */
+	MV88E6XXX_FAMILY_6250,	/* 6220 6250 6020 */
 	MV88E6XXX_FAMILY_6320,	/* 6320 6321 */
 	MV88E6XXX_FAMILY_6341,	/* 6141 6341 */
 	MV88E6XXX_FAMILY_6351,	/* 6171 6175 6350 6351 */

drivers/net/dsa/mv88e6xxx/port.h

@@ -111,6 +111,7 @@
 /* Offset 0x03: Switch Identifier Register */
 #define MV88E6XXX_PORT_SWITCH_ID		0x03
 #define MV88E6XXX_PORT_SWITCH_ID_PROD_MASK	0xfff0
+#define MV88E6XXX_PORT_SWITCH_ID_PROD_6020	0x0200
 #define MV88E6XXX_PORT_SWITCH_ID_PROD_6085	0x04a0
 #define MV88E6XXX_PORT_SWITCH_ID_PROD_6095	0x0950
 #define MV88E6XXX_PORT_SWITCH_ID_PROD_6097	0x0990