diff options
| author | Andrew Lunn <andrew@lunn.ch> | 2016-06-04 19:17:04 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-04 21:29:54 (GMT) |
| commit | e755e49eb3ea925834006c294e989df52f592580 (patch) | |
| tree | 22a130b4708421378138307d97c5ccfd3fe294ff /net/dsa | |
| parent | 39a7f2a4eb496c0c68cc93fcb403190b48605168 (diff) | |
| download | linux-e755e49eb3ea925834006c294e989df52f592580.tar.xz | |
net: dsa: Make mdio bus optional
The switch may want to instantiate its own MDIO bus. Only do it
centrally if the switch has not already created one, and the read op
is implemented.
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>
Diffstat (limited to 'net/dsa')
| -rw-r--r-- | net/dsa/dsa.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c index 221ebde..6c314f3 100644 --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -340,17 +340,18 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) if (ret < 0) goto out; - ds->slave_mii_bus = devm_mdiobus_alloc(parent); - if (ds->slave_mii_bus == NULL) { - ret = -ENOMEM; - goto out; - } - dsa_slave_mii_bus_init(ds); - - ret = mdiobus_register(ds->slave_mii_bus); - if (ret < 0) - goto out; + if (!ds->slave_mii_bus && drv->phy_read) { + ds->slave_mii_bus = devm_mdiobus_alloc(parent); + if (!ds->slave_mii_bus) { + ret = -ENOMEM; + goto out; + } + dsa_slave_mii_bus_init(ds); + ret = mdiobus_register(ds->slave_mii_bus); + if (ret < 0) + goto out; + } /* * Create network devices for physical switch ports. @@ -493,7 +494,8 @@ static void dsa_switch_destroy(struct dsa_switch *ds) dsa_cpu_dsa_destroy(ds->ports[port].dn); } - mdiobus_unregister(ds->slave_mii_bus); + if (ds->slave_mii_bus && ds->drv->phy_read) + mdiobus_unregister(ds->slave_mii_bus); } #ifdef CONFIG_PM_SLEEP |