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net: phy: micrel: refactor broadcast disable 

Refactor and clean up broadcast disable.

Some Micrel PHYs have a broadcast-off bit in the Operation Mode Strap
Override register which can be used to disable PHY address 0 as the
broadcast address, so that it can be used as a unique (non-broadcast)
address on a shared bus.

Note that the KSZPHY_OMSO_RMII_OVERRIDE bit is set by default on
KSZ8021/8031.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johan Hovold 2014-11-11 20:00:10 +01:00 committed by David S. Miller
parent 00aee09500
commit bde151296a
1 changed files with 22 additions and 2 deletions
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24
drivers/net/phy/micrel.c
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@ -184,6 +184,25 @@ static int kszphy_setup_led(struct phy_device *phydev,
return rc < 0 ? rc : 0;
}
/* Disable PHY address 0 as the broadcast address, so that it can be used as a
* unique (non-broadcast) address on a shared bus.
*/
static int kszphy_broadcast_disable(struct phy_device *phydev)
{
int ret;
ret = phy_read(phydev, MII_KSZPHY_OMSO);
if (ret < 0)
goto out;
ret = phy_write(phydev, MII_KSZPHY_OMSO, ret | KSZPHY_OMSO_B_CAST_OFF);
out:
if (ret)
dev_err(&phydev->dev, "failed to disable broadcast address\n");
return ret;
}
static int kszphy_config_init(struct phy_device *phydev)
{
return 0;
@ -197,7 +216,6 @@ static int kszphy_config_init_led8041(struct phy_device *phydev)
static int ksz8021_config_init(struct phy_device *phydev)
{
const u16 val = KSZPHY_OMSO_B_CAST_OFF | KSZPHY_OMSO_RMII_OVERRIDE;
int rc;
rc = kszphy_setup_led(phydev, 0x1f, 4);
@ -207,7 +225,9 @@ static int ksz8021_config_init(struct phy_device *phydev)
rc = ksz_config_flags(phydev);
if (rc < 0)
return rc;
rc = phy_write(phydev, MII_KSZPHY_OMSO, val);
rc = kszphy_broadcast_disable(phydev);
return rc < 0 ? rc : 0;
}