diff options
Diffstat (limited to 'drivers/net/phy/mdio_bus.c')
| -rw-r--r-- | drivers/net/phy/mdio_bus.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 012b90e834..d209716a14 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -32,6 +32,9 @@ int mdiobus_detect(struct device_d *dev) struct mii_bus *mii = to_mii_bus(dev); int i, ret; + if (mii->is_multiplexed) + return 0; + for (i = 0; i < PHY_MAX_ADDR; i++) { struct phy_device *phydev; @@ -207,6 +210,33 @@ struct mii_bus *mdiobus_get_bus(int busnum) } /** + * of_mdio_find_bus - Given an mii_bus node, find the mii_bus. + * @mdio_bus_np: Pointer to the mii_bus. + * + * Returns a reference to the mii_bus, or NULL if none found. + * + * Because the association of a device_node and mii_bus is made via + * mdiobus_register(), the mii_bus cannot be found before it is + * registered with mdiobus_register(). + * + */ +struct mii_bus *of_mdio_find_bus(struct device_node *mdio_bus_np) +{ + struct mii_bus *mii; + + if (!mdio_bus_np) + return NULL; + + for_each_mii_bus(mii) + if (mii->dev.device_node == mdio_bus_np) + return mii; + + return NULL; +} +EXPORT_SYMBOL(of_mdio_find_bus); + + +/** * mdio_bus_match - determine if given PHY driver supports the given PHY device * @dev: target PHY device * @drv: given PHY driver |