Commit b5b6775d authored by Russell King's avatar Russell King Committed by David S. Miller
Browse files

of: add of_mdio_find_device() api 



Add a helper function which finds the mdio_device structure given a
device tree node. This is helpful for finding the PCS device based on a
DTS node but managing it as a mdio_device instead of a phy_device.

Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarIoana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e7e95c90

drivers/of/of_mdio.c

+29 −9
Original line number Diff line number Diff line
@@ -337,6 +337,29 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) 
}

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);

	}

		return to_phy_device(&mdiodev->dev);



	put_device(&mdiodev->dev);



	return NULL;

}

include/linux/of_mdio.h

+6 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ bool of_mdiobus_child_is_phy(struct device_node *child); 
int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np);

int devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio,

			     struct device_node *np);

struct mdio_device *of_mdio_find_device(struct device_node *np);

struct phy_device *of_phy_find_device(struct device_node *phy_np);

struct phy_device *

of_phy_connect(struct net_device *dev, struct device_node *phy_np,
@@ -74,6 +75,11 @@ static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node * 
	return mdiobus_register(mdio);

}



static inline struct mdio_device *of_mdio_find_device(struct device_node *np)

{

	return NULL;

}



static inline struct phy_device *of_phy_find_device(struct device_node *phy_np)

{

	return NULL;