Fix ODROID-C2 Ethernet on some boards (#1202) (#1305)

buildroot-external/board/hardkernel/patches/uboot/0004-arm64-dts-meson-odroidc2-readd-PHY-reset-properties.patch

@@ -0,0 +1,40 @@
+From 825686fdd92e44c4a136f8105e91fb1e05f4c64b Mon Sep 17 00:00:00 2001
+Message-Id: <825686fdd92e44c4a136f8105e91fb1e05f4c64b.1617883279.git.stefan@agner.ch>
+In-Reply-To: <526ccae8321b9b48925c44999611c3c5a374328e.1617883279.git.stefan@agner.ch>
+References: <526ccae8321b9b48925c44999611c3c5a374328e.1617883279.git.stefan@agner.ch>
+From: Stefan Agner <stefan@agner.ch>
+Date: Thu, 1 Apr 2021 14:33:57 +0200
+Subject: [PATCH 4/4] arm64: dts: meson: odroidc2: readd PHY reset properties
+
+The sync of the device tree and dt-bindings from Linux v5.6-rc2
+11a48a5a18c6 ("Linux 5.6-rc2") causes Ethernet to break on some
+ODROID-C2. The PHY seems to need proper reset timing to be functional
+in U-Boot and Linux afterwards. Readd the old PHY reset bindings for
+dwmac until we support the new bindings in the PHY node.
+
+Fixes: dd5f2351e99a ("arm64: dts: meson: sync dt and bindings from v5.6-rc2")
+Signed-off-by: Stefan Agner <stefan@agner.ch>
+---
+ arch/arm/dts/meson-gxbb-odroidc2-u-boot.dtsi | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/arch/arm/dts/meson-gxbb-odroidc2-u-boot.dtsi b/arch/arm/dts/meson-gxbb-odroidc2-u-boot.dtsi
+index 484b40504d..f11b8fa591 100644
+--- a/arch/arm/dts/meson-gxbb-odroidc2-u-boot.dtsi
++++ b/arch/arm/dts/meson-gxbb-odroidc2-u-boot.dtsi
+@@ -6,6 +6,12 @@
+ 
+ #include "meson-gx-u-boot.dtsi"
+ 
++&ethmac {
++	snps,reset-gpio = <&gpio GPIOZ_14 0>;
++	snps,reset-delays-us = <0 10000 1000000>;
++	snps,reset-active-low;
++};
++
+ &usb0 {
+ 	status = "disabled";
+ };
+-- 
+2.31.1
+