linux-kernel - [PATCH] ARM: dts: imx6dl-yapp4: Fix RGMII connection to QCA8334 switch

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Message-Id: <1618325157-5774-1-git-send-email-michal.vokac@ysoft.com>
Date:   Tue, 13 Apr 2021 16:45:57 +0200
From:   Michal Vokáč <michal.vokac@...ft.com>
To:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>
Cc:     Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Michal Vokáč <michal.vokac@...ft.com>,
        stable@...r.kernel.org
Subject: [PATCH] ARM: dts: imx6dl-yapp4: Fix RGMII connection to QCA8334 switch

The FEC does not have a PHY so it should not have a phy-handle. It is
connected to the switch at RGMII level so we need a fixed-link sub-node
on both ends.

This was not a problem until the qca8k.c driver was converted to PHYLINK
by commit b3591c2a3661 ("net: dsa: qca8k: Switch to PHYLINK instead of
PHYLIB"). That commit revealed the FEC configuration was not correct.

Fixes: 87489ec3a77f ("ARM: dts: imx: Add Y Soft IOTA Draco, Hydra and Ursa boards")
Cc: stable@...r.kernel.org
Signed-off-by: Michal Vokáč <michal.vokac@...ft.com>
---
 arch/arm/boot/dts/imx6dl-yapp4-common.dtsi | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
index 111d4d331f98..686dab57a1e4 100644
--- a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
+++ b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
@@ -121,9 +121,13 @@
 	phy-reset-gpios = <&gpio1 25 GPIO_ACTIVE_LOW>;
 	phy-reset-duration = <20>;
 	phy-supply = <&sw2_reg>;
-	phy-handle = <&ethphy0>;
 	status = "okay";
 
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+
 	mdio {
 		#address-cells = <1>;
 		#size-cells = <0>;
-- 
2.1.4