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Commit 86f6cf41 authored by Daniel Mack's avatar Daniel Mack Committed by David S. Miller
Browse files

net: of_mdio: add of_mdiobus_link_phydev() 



Add a function to walk the list of subnodes of a mdio bus and look for
a node that matches the phy's address with its 'reg' property. If found,
set the of_node pointer for the phy. This allows auto-probed pyh
devices to be augmented by information passed in via DT.

Signed-off-by: default avatarDaniel Mack <zonque@gmail.com>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8f838288

drivers/net/phy/mdio_bus.c

+6 −0
Original line number Diff line number Diff line
@@ -300,6 +300,12 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr) 
	if (IS_ERR(phydev) || phydev == NULL)

		return phydev;



	/*

	 * For DT, see if the auto-probed phy has a correspoding child

	 * in the bus node, and set the of_node pointer in this case.

	 */

	of_mdiobus_link_phydev(bus, phydev);



	err = phy_device_register(phydev);

	if (err) {

		phy_device_free(phydev);

drivers/of/of_mdio.c

+33 −0
Original line number Diff line number Diff line
@@ -183,6 +183,39 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) 
}

EXPORT_SYMBOL(of_mdiobus_register);



/**

 * of_mdiobus_link_phydev - Find a device node for a phy

 * @mdio: pointer to mii_bus structure

 * @phydev: phydev for which the of_node pointer should be set

 *

 * Walk the list of subnodes of a mdio bus and look for a node that matches the

 * phy's address with its 'reg' property. If found, set the of_node pointer for

 * the phy. This allows auto-probed pyh devices to be supplied with information

 * passed in via DT.

 */

void of_mdiobus_link_phydev(struct mii_bus *mdio,

			    struct phy_device *phydev)

{

	struct device *dev = &phydev->dev;

	struct device_node *child;



	if (dev->of_node || !mdio->dev.of_node)

		return;



	for_each_available_child_of_node(mdio->dev.of_node, child) {

		int addr;



		addr = of_mdio_parse_addr(&mdio->dev, child);

		if (addr < 0)

			continue;



		if (addr == phydev->addr) {

			dev->of_node = child;

			return;

		}

	}

}



/* Helper function for of_phy_find_device */

static int of_phy_match(struct device *dev, void *phy_np)

{

include/linux/of_mdio.h

+8 −0
Original line number Diff line number Diff line
@@ -25,6 +25,9 @@ struct phy_device *of_phy_attach(struct net_device *dev, 


extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);



extern void of_mdiobus_link_phydev(struct mii_bus *mdio,

				   struct phy_device *phydev);



#else /* CONFIG_OF */

static inline int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)

{
@@ -60,6 +63,11 @@ static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np) 
{

	return NULL;

}



static inline void of_mdiobus_link_phydev(struct mii_bus *mdio,

					  struct phy_device *phydev)

{

}

#endif /* CONFIG_OF */



#if defined(CONFIG_OF) && defined(CONFIG_FIXED_PHY)