realtek: make all link speeds work for RTL8221B in Zyxel XGS1210-12 rev B1

SGMII only works correctly on this device if inband auto-negotiation is
enabled. Configure the PHY for SGMII and in-band mode in the device tree
to make this happen.

For 2.5G link speeds the PHY will still switch to 2500Base-X without AN.

The same configuration also works on RTL8226, so it is fine to apply
this change to the A1 revision of XGS1010-12/XGS1210-12 as well.

Signed-off-by: Jan Hoffmann <jan@3e8.eu>
Link: https://github.com/openwrt/openwrt/pull/21605
Signed-off-by: Robert Marko <robimarko@gmail.com>

diff --git a/target/linux/realtek/dts/rtl9302_zyxel_xgs1x10-12-common.dtsi b/target/linux/realtek/dts/rtl9302_zyxel_xgs1x10-12-common.dtsi
index 9a0f4a93063b41166c75c686b1247c46c8701b7b..539cdb622984a421478c3b5c805246c78a5b234f 100644 (file)
--- a/target/linux/realtek/dts/rtl9302_zyxel_xgs1x10-12-common.dtsi
+++ b/target/linux/realtek/dts/rtl9302_zyxel_xgs1x10-12-common.dtsi
@@ -221,16 +221,18 @@
                        label = "lan9";
                        pcs-handle = <&serdes6>;
                        phy-handle = <&phy24>;
-                       phy-mode = "2500base-x";
+                       phy-mode = "sgmii";
                        led-set = <1>;
+                       managed = "in-band-status";
                };
                port@25 {
                        reg = <25>;
                        label = "lan10";
                        pcs-handle = <&serdes7>;
                        phy-handle = <&phy25>;
-                       phy-mode = "2500base-x";
+                       phy-mode = "sgmii";
                        led-set = <1>;
+                       managed = "in-band-status";
                };
 
                port@26 {