Commit 425775ed authored by Calvin Johnson's avatar Calvin Johnson Committed by David S. Miller
Browse files

net: phy: Introduce phy related fwnode functions 



Define fwnode_phy_find_device() to iterate an mdiobus and find the
phy device of the provided phy fwnode. Additionally define
device_phy_find_device() to find phy device of provided device.

Define fwnode_get_phy_node() to get phy_node using named reference.

Signed-off-by: default avatarCalvin Johnson <calvin.johnson@oss.nxp.com>
Signed-off-by: default avatarIoana Ciornei <ioana.ciornei@nxp.com>
Acked-by: default avatarGrant Likely <grant.likely@arm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0fb16976

drivers/net/phy/phy_device.c

+62 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt



#include <linux/acpi.h>

#include <linux/bitmap.h>

#include <linux/delay.h>

#include <linux/errno.h>
@@ -2898,6 +2899,67 @@ struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode) 
}

EXPORT_SYMBOL(fwnode_mdio_find_device);



/**

 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device.

 *

 * @phy_fwnode: Pointer to the phy's fwnode.

 *

 * If successful, returns a pointer to the phy_device with the embedded

 * struct device refcount incremented by one, or NULL on failure.

 */

struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)

{

	struct mdio_device *mdiodev;



	mdiodev = fwnode_mdio_find_device(phy_fwnode);

	if (!mdiodev)

		return NULL;



	if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)

		return to_phy_device(&mdiodev->dev);



	put_device(&mdiodev->dev);



	return NULL;

}

EXPORT_SYMBOL(fwnode_phy_find_device);



/**

 * device_phy_find_device - For the given device, get the phy_device

 * @dev: Pointer to the given device

 *

 * Refer return conditions of fwnode_phy_find_device().

 */

struct phy_device *device_phy_find_device(struct device *dev)

{

	return fwnode_phy_find_device(dev_fwnode(dev));

}

EXPORT_SYMBOL_GPL(device_phy_find_device);



/**

 * fwnode_get_phy_node - Get the phy_node using the named reference.

 * @fwnode: Pointer to fwnode from which phy_node has to be obtained.

 *

 * Refer return conditions of fwnode_find_reference().

 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy"

 * and "phy-device" are not supported in ACPI. DT supports all the three

 * named references to the phy node.

 */

struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)

{

	struct fwnode_handle *phy_node;



	/* Only phy-handle is used for ACPI */

	phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);

	if (is_acpi_node(fwnode) || !IS_ERR(phy_node))

		return phy_node;

	phy_node = fwnode_find_reference(fwnode, "phy", 0);

	if (IS_ERR(phy_node))

		phy_node = fwnode_find_reference(fwnode, "phy-device", 0);

	return phy_node;

}

EXPORT_SYMBOL_GPL(fwnode_get_phy_node);



/**

 * phy_probe - probe and init a PHY device

 * @dev: device to probe and init

include/linux/phy.h

+20 −0
Original line number Diff line number Diff line
@@ -1378,6 +1378,9 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id, 
				     struct phy_c45_device_ids *c45_ids);

#if IS_ENABLED(CONFIG_PHYLIB)

struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode);

struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode);

struct phy_device *device_phy_find_device(struct device *dev);

struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode);

struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);

int phy_device_register(struct phy_device *phy);

void phy_device_free(struct phy_device *phydev);
@@ -1388,6 +1391,23 @@ struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode) 
	return 0;

}



static inline

struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)

{

	return NULL;

}



static inline struct phy_device *device_phy_find_device(struct device *dev)

{

	return NULL;

}



static inline

struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)

{

	return NULL;

}



static inline

struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)

{