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net: phy: bcm7xxx: re-advertise all supported modes out of suspend 

The BCM7xxx internal Gigabit PHYs on 28nm process platforms come out
reset without any half-duplex or "hub" compatible advertised modes,
which was causing auto-negotiation issues coming out of S3
suspend/resume, we just could not establish a link with a half-duplex
only link partner.

Make sure that the resume function properly re-configures the PHY device
to advertise all supported modes.

Fixes: b560a58c45 ("net: phy: add Broadcom BCM7xxx internal PHY driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@greenl8ke.davemloft.net>
This commit is contained in:
Florian Fainelli 2014-08-14 16:52:52 -07:00 committed by David S. Miller
parent 16466f4284
commit 4fd14e0b4a
1 changed files with 20 additions and 3 deletions
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23
drivers/net/phy/bcm7xxx.c
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@ -157,6 +157,23 @@ static int bcm7xxx_28nm_config_init(struct phy_device *phydev)
return bcm7xxx_28nm_afe_config_init(phydev);
}
static int bcm7xxx_28nm_resume(struct phy_device *phydev)
{
int ret;
/* Re-apply workarounds coming out suspend/resume */
ret = bcm7xxx_28nm_config_init(phydev);
if (ret)
return ret;
/* 28nm Gigabit PHYs come out of reset without any half-duplex
* or "hub" compliant advertised mode, fix that. This does not
* cause any problems with the PHY library since genphy_config_aneg()
* gracefully handles auto-negotiated and forced modes.
*/
return genphy_config_aneg(phydev);
}
static int phy_set_clr_bits(struct phy_device *dev, int location,
int set_mask, int clr_mask)
{
@ -258,7 +275,7 @@ static struct phy_driver bcm7xxx_driver[] = {
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_28nm_afe_config_init,
.resume = bcm7xxx_28nm_resume,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM7439,
@ -271,7 +288,7 @@ static struct phy_driver bcm7xxx_driver[] = {
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_28nm_afe_config_init,
.resume = bcm7xxx_28nm_resume,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM7445,
@ -284,7 +301,7 @@ static struct phy_driver bcm7xxx_driver[] = {
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_28nm_config_init,
.resume = bcm7xxx_28nm_afe_config_init,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_BCM_OUI_4,