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net: dsa: Provide a slave MII bus if needed 

Mimic what net/dsa/dsa.c does and provide a slave MII bus by default
which will be created if the driver implements a phy_read method.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2016-06-07 16:32:40 -07:00 committed by David S. Miller
parent 6e830d8f0d
commit 1eb59443e7
1 changed files with 15 additions and 0 deletions
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15
net/dsa/dsa2.c
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@ -312,6 +312,18 @@ static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
if (err < 0)
return err;
if (!ds->slave_mii_bus && ds->drv->phy_read) {
ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev);
if (!ds->slave_mii_bus)
return -ENOMEM;
dsa_slave_mii_bus_init(ds);
err = mdiobus_register(ds->slave_mii_bus);
if (err < 0)
return err;
}
for (index = 0; index < DSA_MAX_PORTS; index++) {
port = ds->ports[index].dn;
if (!port)
@ -361,6 +373,9 @@ static void dsa_ds_unapply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
dsa_user_port_unapply(port, index, ds);
}
if (ds->slave_mii_bus && ds->drv->phy_read)
mdiobus_unregister(ds->slave_mii_bus);
}
static int dsa_dst_apply(struct dsa_switch_tree *dst)