--- a/target/linux/ath79/dts/qca9558_ubnt_rocket-5ac-lite.dts
+++ b/target/linux/ath79/dts/qca9558_ubnt_rocket-5ac-lite.dts
@@ -36,6 +35,14 @@
 	nvmem-cell-names = "mac-address";
 	phy-mode = "sgmii";
 	phy-handle = <&phy4>;
+	pll-reg = <0 0x48 0>;
+	pll-data = <0x03000000 0x00000101 0x00001313>;
+
+	qca955x-sgmii-fixup;
+
+	gmac-config {
+		device = <&gmac>;
+	};
 };
 
 &art {
--- a/target/linux/ath79/dts/qca9558_ubnt_powerbeam-5ac-500.dts
+++ b/target/linux/ath79/dts/qca9558_ubnt_powerbeam-5ac-500.dts
@@ -36,6 +35,14 @@
 	nvmem-cell-names = "mac-address";
 	phy-mode = "sgmii";
 	phy-handle = <&phy4>;
+	pll-reg = <0 0x48 0>;
+	pll-data = <0x03000000 0x00000101 0x00001313>;
+
+	qca955x-sgmii-fixup;
+
+	gmac-config {
+		device = <&gmac>;
+	};
 };
 
 &art {