netdev - [PATCH net] arm64: dts: clearfog-gt-8k: fix switch link configuration

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Message-Id: <E1jx73g-0006mp-UI@rmk-PC.armlinux.org.uk>
Date:   Sun, 19 Jul 2020 12:00:40 +0100
From:   Russell King <rmk+kernel@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Martin Rowe <martin.p.rowe@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        devicetree@...r.kernel.org,
        Gregory Clement <gregory.clement@...tlin.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jason Cooper <jason@...edaemon.net>,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>
Subject: [PATCH net] arm64: dts: clearfog-gt-8k: fix switch link configuration

The commit below caused a regression for clearfog-gt-8k, where the link
between the switch and the host does not come up.

Investigation revealed two issues:
- MV88E6xxx DSA no longer allows an in-band link to come up as the link
  is programmed to be forced down. Commit "net: dsa: mv88e6xxx: fix
  in-band AN link establishment" addresses this.

- The dts configured dissimilar link modes at each end of the host to
  switch link; the host was configured using a fixed link (so has no
  in-band status) and the switch was configured to expect in-band
  status.

With both issues fixed, the regression is resolved.

Fixes: 34b5e6a33c1a ("net: dsa: mv88e6xxx: Configure MAC when using fixed link")
Reported-by: Martin Rowe <martin.p.rowe@...il.com>
Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
 arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
index c8243da71041..eb01cc96ba7a 100644
--- a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
+++ b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
@@ -454,10 +454,7 @@
 	status = "okay";
 	phy-mode = "2500base-x";
 	phys = <&cp1_comphy5 2>;
-	fixed-link {
-		speed = <2500>;
-		full-duplex;
-	};
+	managed = "in-band-status";
 };
 
 &cp1_spi1 {
-- 
2.20.1