Commit f8cd8753 authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller
Browse files

dsa: mv88e6xxx: Handle eeprom-length property 



A switch can export an attached EEPROM using the standard ethtool API.
However the switch itself cannot determine the size of the EEPROM, and
multiple sizes are allowed. Thus a device tree property is supported
to indicate the length of the EEPROM. Parse this property during
device probe, and implement a callback function to retrieve it.

Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ff04955c

drivers/net/dsa/mv88e6xxx.c

+17 −0
Original line number Diff line number Diff line
@@ -869,6 +869,16 @@ error: 
	return ret;

}



static int mv88e6xxx_get_eeprom_len(struct dsa_switch *ds)

{

	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);



	if (mv88e6xxx_has(ps, MV88E6XXX_FLAG_EEPROM))

		return ps->eeprom_len;



	return 0;

}



static int mv88e6xxx_get_eeprom(struct dsa_switch *ds,

				struct ethtool_eeprom *eeprom, u8 *data)

{
@@ -3610,6 +3620,7 @@ struct dsa_switch_driver mv88e6xxx_switch_driver = { 
	.set_temp_limit		= mv88e6xxx_set_temp_limit,

	.get_temp_alarm		= mv88e6xxx_get_temp_alarm,

#endif

	.get_eeprom_len		= mv88e6xxx_get_eeprom_len,

	.get_eeprom		= mv88e6xxx_get_eeprom,

	.set_eeprom		= mv88e6xxx_set_eeprom,

	.get_regs_len		= mv88e6xxx_get_regs_len,
@@ -3631,9 +3642,11 @@ struct dsa_switch_driver mv88e6xxx_switch_driver = { 
int mv88e6xxx_probe(struct mdio_device *mdiodev)

{

	struct device *dev = &mdiodev->dev;

	struct device_node *np = dev->of_node;

	struct mv88e6xxx_priv_state *ps;

	int id, prod_num, rev;

	struct dsa_switch *ds;

	u32 eeprom_len;

	int err;



	ds = devm_kzalloc(dev, sizeof(*ds) + sizeof(*ps), GFP_KERNEL);
@@ -3676,6 +3689,10 @@ int mv88e6xxx_probe(struct mdio_device *mdiodev) 
		}

	}



	if (mv88e6xxx_has(ps, MV88E6XXX_FLAG_EEPROM) &&

	    !of_property_read_u32(np, "eeprom-length", &eeprom_len))

		ps->eeprom_len = eeprom_len;



	dev_set_drvdata(dev, ds);



	dev_info(dev, "switch 0x%x probed: %s, revision %u\n",

drivers/net/dsa/mv88e6xxx.h

+3 −0
Original line number Diff line number Diff line
@@ -602,6 +602,9 @@ struct mv88e6xxx_priv_state { 
	 * switch soft reset.

	 */

	struct gpio_desc *reset;



	/* set to size of eeprom if supported by the switch */

	int		eeprom_len;

};



enum stat_type {

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