From: Stefan Roese <sr@denx.de>
Date: Wed, 10 Feb 2016 06:06:06 +0000 (+0100)
Subject: net: phy: marvell: Fix problem with phy_reset() clearing BMCR
X-Git-Tag: v2016.03-rc3~87
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a8c3eca43393cffef16a40e683f7a4d45b37e6ed;p=platform%2Fkernel%2Fu-boot.git

net: phy: marvell: Fix problem with phy_reset() clearing BMCR

With commit a058052c [net: phy: do not read configuration register on
reset], phy_reset() will clear the BMCR register. Resulting in bit 12
being cleared (A/N enable). This leads to autonegotiation link problems,
at least on the Marvell Armada ClearFog board. I suspect that other
boards using this driver will be affected as well.

At the of m88e1111s_config(), phy_reset() is called. This is not needed
for the PHY to load the changed configuration, as phy_reset() is called
a few lines before already. So lets call genphy_restart_aneg() here
instead to start the AN correctly.

Tested on clearfog.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Hao Zhang <hzhang@ti.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
---

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 6e3dc85..b8b1157 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -251,8 +251,7 @@ static int m88e1111s_config(struct phy_device *phydev)
 	phy_reset(phydev);
 
 	genphy_config_aneg(phydev);
-
-	phy_reset(phydev);
+	genphy_restart_aneg(phydev);
 
 	return 0;
 }