diff --git a/target/linux/ath79/dts/qca9556_avm_fritz-repeater.dtsi b/target/linux/ath79/dts/qca9556_avm_fritz-repeater.dtsi
index 34b47b15f7..13e0b3371a 100644
--- a/target/linux/ath79/dts/qca9556_avm_fritz-repeater.dtsi
+++ b/target/linux/ath79/dts/qca9556_avm_fritz-repeater.dtsi
@@ -78,6 +78,8 @@
 	phy-handle = <&phy0>;
 	pll-data = <0x3000000 0x101 0x1313>;
 
+	qca955x-sgmii-fixup;
+
 	gmac-config {
 		device = <&gmac>;
 		ge0-sgmii = <0>;
@@ -89,5 +91,6 @@
 
 	phy0: ethernet-phy@0 {
 		reg = <0>;
+		at803x-override-sgmii-link-check;
 	};
 };
diff --git a/target/linux/ath79/dts/qca9558_devolo_dvl1xxx.dtsi b/target/linux/ath79/dts/qca9558_devolo_dvl1xxx.dtsi
index 25e0fee3bd..fc15dd4416 100644
--- a/target/linux/ath79/dts/qca9558_devolo_dvl1xxx.dtsi
+++ b/target/linux/ath79/dts/qca9558_devolo_dvl1xxx.dtsi
@@ -132,6 +132,7 @@
 &mdio1 {
 	phy1: ethernet-phy@1 {
 		reg = <1>;
+		at803x-override-sgmii-link-check;
 	};
 };
 
@@ -141,6 +142,8 @@
 
 	phy-handle = <&phy1>;
 	pll-data = <0x03000101 0x00000101 0x00001313>;
+
+	qca955x-sgmii-fixup;
 };
 
 &wmac {
diff --git a/target/linux/ath79/dts/qca9558_ocedo_ursus.dts b/target/linux/ath79/dts/qca9558_ocedo_ursus.dts
index b790ed11a2..d629f5b6ba 100644
--- a/target/linux/ath79/dts/qca9558_ocedo_ursus.dts
+++ b/target/linux/ath79/dts/qca9558_ocedo_ursus.dts
@@ -117,6 +117,7 @@
 
 	phy2: ethernet-phy@2 {
 		reg = <2>;
+		at803x-override-sgmii-link-check;
 	};
 };
 
@@ -144,4 +145,5 @@
 	mtd-mac-address = <&art 0x12>;
 	phy-handle = <&phy2>;
 	pll-data = <0x3000101 0x101 0x1313>;
+	qca955x-sgmii-fixup;
 };