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libphy: add phy_find_first function

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Many drivers do this in them manually. Now they can use this function.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2010-02-04 10:23:02 -08:00 • committed by David S. Miller
commit f8f76db1db
2 changed files with 17 additions and 0 deletions
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16
drivers/net/phy/phy_device.c
View file

@ -276,6 +276,22 @@ int phy_device_register(struct phy_device *phydev)
}
EXPORT_SYMBOL(phy_device_register);
/**
* phy_find_first - finds the first PHY device on the bus
* @bus: the target MII bus
*/
struct phy_device *phy_find_first(struct mii_bus *bus)
{
int addr;
for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
if (bus->phy_map[addr])
return bus->phy_map[addr];
}
return NULL;
}
EXPORT_SYMBOL(phy_find_first);
/**
* phy_prepare_link - prepares the PHY layer to monitor link status
* @phydev: target phy_device struct

1
include/linux/phy.h
View file

@ -452,6 +452,7 @@ 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);
struct phy_device *phy_find_first(struct mii_bus *bus);
int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
void (*handler)(struct net_device *), u32 flags,
phy_interface_t interface);