[PATCH] ARM64: dts: meson-axg: fix ethernet stability issue

[Jerome Brunet]

Like the odroid-c2 and wetek, the s400 uses the RTL8211F and seems to
suffer from the kind of stability issue.

Doing an iperf3 download test, we can see a significant number of LPI
interrupts on the tx path. After a short while (5 to 15 seconds), the
network connection dies. If using rootfs over NFS, the connection may
also break during the boot sequence.

We still don't have a real explanation for this problem so let's disable
EEE once again.

Fixes: f6f6ac914b82 ("ARM64: dts: meson-axg: enable ethernet for A113D S400 
board")
Signed-off-by: Jerome Brunet <jbru...@baylibre.com>
---
 arch/arm64/boot/dts/amlogic/meson-axg-s400.dts | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts 
b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
index 4b3331fbfe39..dff9b15eb3c0 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
@@ -66,9 +66,22 @@
 
 &ethmac {
        status = "okay";
-       phy-mode = "rgmii";
        pinctrl-0 = <&eth_rgmii_y_pins>;
        pinctrl-names = "default";
+       phy-handle = <&eth_phy0>;
+       phy-mode = "rgmii";
+
+       mdio {
+               compatible = "snps,dwmac-mdio";
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               eth_phy0: ethernet-phy@0 {
+                       /* Realtek RTL8211F (0x001cc916) */
+                       reg = <0>;
+                       eee-broken-1000t;
+               };
+       };
 };
 
 &uart_A {
-- 
2.14.4