Commit 4fd14e0b authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

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: b560a58c ("net: phy: add Broadcom BCM7xxx internal PHY driver")
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@greenl8ke.davemloft.net>
parent 16466f42

drivers/net/phy/bcm7xxx.c

+20 −3
Original line number Diff line number Diff line
@@ -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,

CRA Git | Maintained and supported by SUSTech CRA and CCSE