diff options
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/of_mdio.c | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c index cb32d7ef4938..4daf94bb56a5 100644 --- a/drivers/of/of_mdio.c +++ b/drivers/of/of_mdio.c @@ -338,6 +338,29 @@ unregister: EXPORT_SYMBOL(of_mdiobus_register); /** + * of_mdio_find_device - Given a device tree node, find the mdio_device + * @np: pointer to the mdio_device's device tree node + * + * If successful, returns a pointer to the mdio_device with the embedded + * struct device refcount incremented by one, or NULL on failure. + * The caller should call put_device() on the mdio_device after its use + */ +struct mdio_device *of_mdio_find_device(struct device_node *np) +{ + struct device *d; + + if (!np) + return NULL; + + d = bus_find_device_by_of_node(&mdio_bus_type, np); + if (!d) + return NULL; + + return to_mdio_device(d); +} +EXPORT_SYMBOL(of_mdio_find_device); + +/** * of_phy_find_device - Give a PHY node, find the phy_device * @phy_np: Pointer to the phy's device tree node * @@ -346,19 +369,16 @@ EXPORT_SYMBOL(of_mdiobus_register); */ struct phy_device *of_phy_find_device(struct device_node *phy_np) { - struct device *d; struct mdio_device *mdiodev; - if (!phy_np) + mdiodev = of_mdio_find_device(phy_np); + if (!mdiodev) return NULL; - d = bus_find_device_by_of_node(&mdio_bus_type, phy_np); - if (d) { - mdiodev = to_mdio_device(d); - if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY) - return to_phy_device(d); - put_device(d); - } + if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY) + return to_phy_device(&mdiodev->dev); + + put_device(&mdiodev->dev); return NULL; } |