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>
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 921a36f..4e0f3c2 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -312,6 +312,18 @@
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 @@
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)