sunxi H5 DTB fix for realtek regression

[Clément Bœsch <u@xxxxxx>]

Hi,

Commit bbc4d71d63549bcd003a430de18a72a742d8c91e ("net: phy: realtek: fix
rtl8211e rx/tx delay config") broke the network on the NanoPI NEO 2 board
(RTL8211E chip).

Following what was suggested by Andrew Lunn for another hardware¹, I tried
the following diff:

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts b/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
index 02f8e72f0cad..05486cccee1c 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
@@ -75,7 +75,7 @@ &emac {
        pinctrl-0 = <&emac_rgmii_pins>;
        phy-supply = <&reg_gmac_3v3>;
        phy-handle = <&ext_rgmii_phy>;
-       phy-mode = "rgmii";
+       phy-mode = "rgmii-id";
        status = "okay";
 };


...which fixed the issue. This was tested on v5.11.4 but the patch applies
cleanly on stable so far.

I'm sorry for not sending a proper patch: I unfortunately have very little
clue about what I'm doing here so it's very hard for me to elaborate a
proper commit description.

Best regards,

[1]: https://www.spinics.net/lists/netdev/msg692731.html

-- 
Clément B.