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phylib: factor out get_phy_id from within get_phy_device 

We were already doing what amounts to a get_phy_id from within
get_phy_device, and rather than duplicate this for the TBIPA
probing, we might as well just factor it out and make it available
instead.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Paul Gortmaker 2008-04-15 12:49:21 -04:00 committed by Jeff Garzik
parent b1394f961a
commit cac1f3c8a8
2 changed files with 39 additions and 18 deletions
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56
drivers/net/phy/phy_device.c
View File

@ -85,6 +85,39 @@ struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id)
}
EXPORT_SYMBOL(phy_device_create);
/**
* get_phy_id - reads the specified addr for its ID.
* @bus: the target MII bus
* @addr: PHY address on the MII bus
* @phy_id: where to store the ID retrieved.
*
* Description: Reads the ID registers of the PHY at @addr on the
* @bus, stores it in @phy_id and returns zero on success.
*/
int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id)
{
int phy_reg;
/* Grab the bits from PHYIR1, and put them
* in the upper half */
phy_reg = bus->read(bus, addr, MII_PHYSID1);
if (phy_reg < 0)
return -EIO;
*phy_id = (phy_reg & 0xffff) << 16;
/* Grab the bits from PHYIR2, and put them in the lower half */
phy_reg = bus->read(bus, addr, MII_PHYSID2);
if (phy_reg < 0)
return -EIO;
*phy_id |= (phy_reg & 0xffff);
return 0;
}
/**
* get_phy_device - reads the specified PHY device and returns its @phy_device struct
* @bus: the target MII bus
@ -95,26 +128,13 @@ EXPORT_SYMBOL(phy_device_create);
*/
struct phy_device * get_phy_device(struct mii_bus *bus, int addr)
{
int phy_reg;
u32 phy_id;
struct phy_device *dev = NULL;
u32 phy_id;
int r;
/* Grab the bits from PHYIR1, and put them
* in the upper half */
phy_reg = bus->read(bus, addr, MII_PHYSID1);
if (phy_reg < 0)
return ERR_PTR(phy_reg);
phy_id = (phy_reg & 0xffff) << 16;
/* Grab the bits from PHYIR2, and put them in the lower half */
phy_reg = bus->read(bus, addr, MII_PHYSID2);
if (phy_reg < 0)
return ERR_PTR(phy_reg);
phy_id |= (phy_reg & 0xffff);
r = get_phy_id(bus, addr, &phy_id);
if (r)
return ERR_PTR(r);
/* If the phy_id is all Fs, there is no device there */
if (0xffffffff == phy_id)

1
include/linux/phy.h
View File

@ -381,6 +381,7 @@ struct phy_driver {
int phy_read(struct phy_device *phydev, u16 regnum);
int phy_write(struct phy_device *phydev, u16 regnum, u16 val);
int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id);
struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
int phy_clear_interrupt(struct phy_device *phydev);
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts);