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| author | Andrew Lunn <andrew@lunn.ch> | 2016-05-10 23:27:25 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-11 19:36:29 -0400 |
| commit | f8cd8753def081b92b93209265bce68a73885ed0 (patch) | |
| tree | e438a6286d9a2cfbd56ef6e7608ed238ee4deb7e | |
| parent | ff04955c2f678a2c4c3207e0184c4c389da9d1e2 (diff) | |
| download | op-kernel-dev-f8cd8753def081b92b93209265bce68a73885ed0.zip op-kernel-dev-f8cd8753def081b92b93209265bce68a73885ed0.tar.gz | |
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: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx.c | 17 | ||||
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx.h | 3 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index ee78309..a3f0e7e 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -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", diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h index 9ef7673..40e8721 100644 --- a/drivers/net/dsa/mv88e6xxx.h +++ b/drivers/net/dsa/mv88e6xxx.h @@ -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 { |
