netdev - [PATCH] net: phy: marvell: avoid configuring fiber page for SGMII-to-Copper

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Message-Id: <E1eP3Ep-0000ZC-UN@rmk-PC.armlinux.org.uk>
Date:   Wed, 13 Dec 2017 09:22:03 +0000
From:   Russell King <rmk+kernel@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     Jon Nettleton <jon@...id-run.com>, netdev@...r.kernel.org
Subject: [PATCH] net: phy: marvell: avoid configuring fiber page for
 SGMII-to-Copper

When in SGMII-to-Copper mode, the fiber page is used for the MAC facing
link, and does not require configuration of the fiber auto-negotiation
settings.  Avoid trying.

Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/marvell.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 1e3996b41af5..710110ead6ad 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -678,6 +678,10 @@ static int m88e1510_config_aneg(struct phy_device *phydev)
 	if (err < 0)
 		goto error;
 
+	/* Do not touch the fiber page if we're in copper->sgmii mode */
+	if (phydev->interface == PHY_INTERFACE_MODE_SGMII)
+		return 0;
+
 	/* Then the fiber link */
 	err = marvell_set_page(phydev, MII_MARVELL_FIBER_PAGE);
 	if (err < 0)
-- 
2.7.4