Fixes for AllWinner wired network issues due to Realtek PHY driver change (rhbz 1889090)

1 files changed, 132 insertions, 0 deletions

diff --git a/ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch b/ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch
new file mode 100644
index 000000000..d3dfe92c5
--- /dev/null
+++ b/ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch
@@ -0,0 +1,132 @@
+From patchwork Sun Oct 25 14:01:44 2020
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+From: Adam Sampson <ats@offog.org>
+To: linux-sunxi@googlegroups.com, devicetree@vger.kernel.org,
+ linux-arm-kernel@lists.infradead.org
+Subject: [PATCH] ARM: dts: sun7i: pcduino3-nano: enable RGMII RX/TX delay on
+ PHY
+Date: Sun, 25 Oct 2020 14:01:44 +0000
+Message-Id: <20201025140144.28693-1-ats@offog.org>
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+
+The RX/TX delays for the Ethernet PHY on the Linksprite pcDuino 3 Nano
+are configured in hardware, using resistors that are populated to pull
+the RTL8211E's RXDLY/TXDLY pins low or high as needed.
+
+phy-mode should be set to rgmii-id to reflect this. Previously it was
+set to rgmii, which used to work but now results in the delays being
+disabled again as a result of the bugfix in commit bbc4d71d6354 ("net:
+phy: realtek: fix rtl8211e rx/tx delay config").
+
+Tested on two pcDuino 3 Nano boards purchased in 2015. Without this fix,
+Ethernet works unreliably on one board and doesn't work at all on the
+other.
+
+Fixes: 061035d456c9 ("ARM: dts: sun7i: Add dts file for pcDuino 3 Nano board")
+Signed-off-by: Adam Sampson <ats@offog.org>
+Reviewed-by: Andrew Lunn <andrew@lunn.ch>
+---
+ arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts b/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts
+index fce2f7fcd084..bf38c66c1815 100644
+--- a/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts
++++ b/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts
+@@ -1,5 +1,5 @@
+ /*
+- * Copyright 2015 Adam Sampson <ats@offog.org>
++ * Copyright 2015-2020 Adam Sampson <ats@offog.org>
+  *
+  * This file is dual-licensed: you can use it either under the terms
+  * of the GPL or the X11 license, at your option. Note that this dual
+@@ -115,7 +115,7 @@ &gmac {
+ 	pinctrl-names = "default";
+ 	pinctrl-0 = <&gmac_rgmii_pins>;
+ 	phy-handle = <&phy1>;
+-	phy-mode = "rgmii";
++	phy-mode = "rgmii-id";
+ 	status = "okay";
+ };
+