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phylib: add *_direct() variants of phy_connect and phy_attach functions

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Add phy_connect_direct() and phy_attach_direct() functions so that
drivers can use a pointer to the phy_device instead of trying to determine
the phy's bus_id string.

This patch is useful for OF device tree descriptions of phy devices where
the driver doesn't need or know what the bus_id value in order to get a
phy_device pointer.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Grant Likely 2009-04-25 12:52:51 +00:00 committed by David S. Miller
parent 4dea547fef
commit fa94f6d93c
2 changed files with 90 additions and 33 deletions
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118
drivers/net/phy/phy_device.c
View file

@ -291,6 +291,33 @@ void phy_prepare_link(struct phy_device *phydev,
phydev->adjust_link = handler;
}
/**
* phy_connect_direct - connect an ethernet device to a specific phy_device
* @dev: the network device to connect
* @phydev: the pointer to the phy device
* @handler: callback function for state change notifications
* @flags: PHY device's dev_flags
* @interface: PHY device's interface
*/
int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
void (*handler)(struct net_device *), u32 flags,
phy_interface_t interface)
{
int rc;
rc = phy_attach_direct(dev, phydev, flags, interface);
if (rc)
return rc;
phy_prepare_link(phydev, handler);
phy_start_machine(phydev, NULL);
if (phydev->irq > 0)
phy_start_interrupts(phydev);
return 0;
}
EXPORT_SYMBOL(phy_connect_direct);
/**
* phy_connect - connect an ethernet device to a PHY device
* @dev: the network device to connect
@ -312,18 +339,21 @@ struct phy_device * phy_connect(struct net_device *dev, const char *bus_id,
phy_interface_t interface)
{
struct phy_device *phydev;
struct device *d;
int rc;
phydev = phy_attach(dev, bus_id, flags, interface);
/* Search the list of PHY devices on the mdio bus for the
* PHY with the requested name */
d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
if (!d) {
pr_err("PHY %s not found\n", bus_id);
return ERR_PTR(-ENODEV);
}
phydev = to_phy_device(d);
if (IS_ERR(phydev))
return phydev;
phy_prepare_link(phydev, handler);
phy_start_machine(phydev, NULL);
if (phydev->irq > 0)
phy_start_interrupts(phydev);
rc = phy_connect_direct(dev, phydev, handler, flags, interface);
if (rc)
return ERR_PTR(rc);
return phydev;
}
@ -347,9 +377,9 @@ void phy_disconnect(struct phy_device *phydev)
EXPORT_SYMBOL(phy_disconnect);
/**
* phy_attach - attach a network device to a particular PHY device
* phy_attach_direct - attach a network device to a given PHY device pointer
* @dev: network device to attach
* @bus_id: PHY device to attach
* @phydev: Pointer to phy_device to attach
* @flags: PHY device's dev_flags
* @interface: PHY device's interface
*
@ -360,22 +390,10 @@ EXPORT_SYMBOL(phy_disconnect);
* the attaching device, and given a callback for link status
* change. The phy_device is returned to the attaching driver.
*/
struct phy_device *phy_attach(struct net_device *dev,
const char *bus_id, u32 flags, phy_interface_t interface)
int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
u32 flags, phy_interface_t interface)
{
struct bus_type *bus = &mdio_bus_type;
struct phy_device *phydev;
struct device *d;
/* Search the list of PHY devices on the mdio bus for the
* PHY with the requested name */
d = bus_find_device_by_name(bus, NULL, bus_id);
if (d) {
phydev = to_phy_device(d);
} else {
printk(KERN_ERR "%s not found\n", bus_id);
return ERR_PTR(-ENODEV);
}
struct device *d = &phydev->dev;
/* Assume that if there is no driver, that it doesn't
* exist, and we should use the genphy driver. */
@ -388,13 +406,12 @@ struct phy_device *phy_attach(struct net_device *dev,
err = device_bind_driver(d);
if (err)
return ERR_PTR(err);
return err;
}
if (phydev->attached_dev) {
printk(KERN_ERR "%s: %s already attached\n",
dev->name, bus_id);
return ERR_PTR(-EBUSY);
dev_err(&dev->dev, "PHY already attached\n");
return -EBUSY;
}
phydev->attached_dev = dev;
@ -412,14 +429,49 @@ struct phy_device *phy_attach(struct net_device *dev,
err = phy_scan_fixups(phydev);
if (err < 0)
return ERR_PTR(err);
return err;
err = phydev->drv->config_init(phydev);
if (err < 0)
return ERR_PTR(err);
return err;
}
return 0;
}
EXPORT_SYMBOL(phy_attach_direct);
/**
* phy_attach - attach a network device to a particular PHY device
* @dev: network device to attach
* @bus_id: Bus ID of PHY device to attach
* @flags: PHY device's dev_flags
* @interface: PHY device's interface
*
* Description: Same as phy_attach_direct() except that a PHY bus_id
* string is passed instead of a pointer to a struct phy_device.
*/
struct phy_device *phy_attach(struct net_device *dev,
const char *bus_id, u32 flags, phy_interface_t interface)
{
struct bus_type *bus = &mdio_bus_type;
struct phy_device *phydev;
struct device *d;
int rc;
/* Search the list of PHY devices on the mdio bus for the
* PHY with the requested name */
d = bus_find_device_by_name(bus, NULL, bus_id);
if (!d) {
pr_err("PHY %s not found\n", bus_id);
return ERR_PTR(-ENODEV);
}
phydev = to_phy_device(d);
rc = phy_attach_direct(dev, phydev, flags, interface);
if (rc)
return ERR_PTR(rc);
return phydev;
}
EXPORT_SYMBOL(phy_attach);

5
include/linux/phy.h
View file

@ -447,8 +447,13 @@ struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
int phy_device_register(struct phy_device *phy);
int phy_clear_interrupt(struct phy_device *phydev);
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts);
int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
u32 flags, phy_interface_t interface);
struct phy_device * phy_attach(struct net_device *dev,
const char *bus_id, u32 flags, phy_interface_t interface);
int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
void (*handler)(struct net_device *), u32 flags,
phy_interface_t interface);
struct phy_device * phy_connect(struct net_device *dev, const char *bus_id,
void (*handler)(struct net_device *), u32 flags,
phy_interface_t interface);