net: dsa: mv88e6xxx: Add support for EEPROM via platform data

Add the size of the EEPROM to the platform data, so it can also be
instantiated by a platform device.
Signed-off-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

@@ -4386,7 +4386,6 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 	struct device_node *np = dev->of_node;
 	const struct mv88e6xxx_info *compat_info;
 	struct mv88e6xxx_chip *chip;
-	u32 eeprom_len;
 	int port;
 	int err;
 
@@ -4436,9 +4435,13 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 
 	mv88e6xxx_phy_init(chip);
 
-	if (chip->info->ops->get_eeprom &&
-	    !of_property_read_u32(np, "eeprom-length", &eeprom_len))
-		chip->eeprom_len = eeprom_len;
+	if (chip->info->ops->get_eeprom) {
+		if (np)
+			of_property_read_u32(np, "eeprom-length",
+					     &chip->eeprom_len);
+		else
+			chip->eeprom_len = pdata->eeprom_len;
+	}
 
 	mutex_lock(&chip->reg_lock);
 	err = mv88e6xxx_switch_reset(chip);

drivers/net/dsa/mv88e6xxx/chip.h

@@ -238,7 +238,7 @@ struct mv88e6xxx_chip {
 	struct gpio_desc *reset;
 
 	/* set to size of eeprom if supported by the switch */
-	int		eeprom_len;
+	u32 eeprom_len;
 
 	/* List of mdio busses */
 	struct list_head mdios;

include/linux/platform_data/mv88e6xxx.h

@@ -12,6 +12,7 @@ struct dsa_mv88e6xxx_pdata {
 	const char *compatible;
 	unsigned int enabled_ports;
 	struct net_device *netdev;
+	u32 eeprom_len;
 };
 
 #endif