diff --git a/boards/st/nucleo_h563zi/nucleo_h563zi.dts b/boards/st/nucleo_h563zi/nucleo_h563zi.dts
index 347a9fa954899c0..e4bf6a632c921af 100644
--- a/boards/st/nucleo_h563zi/nucleo_h563zi.dts
+++ b/boards/st/nucleo_h563zi/nucleo_h563zi.dts
@@ -40,14 +40,24 @@
 
 &mac {
 	status = "okay";
-	pinctrl-0 = <&eth_mdc_pc1
-		     &eth_rxd0_pc4
+	pinctrl-0 = <&eth_rxd0_pc4
 		     &eth_rxd1_pc5
 		     &eth_ref_clk_pa1
-		     &eth_mdio_pa2
 		     &eth_crs_dv_pa7
 		     &eth_tx_en_pg11
 		     &eth_txd0_pg13
 		     &eth_txd1_pb15>;
 	pinctrl-names = "default";
 };
+
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&eth_mdio_pa2 &eth_mdc_pc1>;
+	pinctrl-names = "default";
+
+	ethernet-phy@0 {
+		compatible = "generic-phy";
+		reg = <0x00>;
+		status = "okay";
+	};
+};
diff --git a/boards/st/nucleo_h723zg/nucleo_h723zg.dts b/boards/st/nucleo_h723zg/nucleo_h723zg.dts
index cb3064b6ef2c27f..d02057070b09100 100644
--- a/boards/st/nucleo_h723zg/nucleo_h723zg.dts
+++ b/boards/st/nucleo_h723zg/nucleo_h723zg.dts
@@ -160,9 +160,7 @@
 &mac {
 	status = "okay";
 	pinctrl-0 = <&eth_ref_clk_pa1
-		     &eth_mdio_pa2
 		     &eth_crs_dv_pa7
-		     &eth_mdc_pc1
 		     &eth_rxd0_pc4
 		     &eth_rxd1_pc5
 		     &eth_tx_en_pg11
@@ -171,6 +169,18 @@
 	pinctrl-names = "default";
 };
 
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&eth_mdio_pa2 &eth_mdc_pc1>;
+	pinctrl-names = "default";
+
+	ethernet-phy@0 {
+		compatible = "adi,adin1100-phy";
+		reg = <0x00>;
+		status = "okay";
+	};
+};
+
 zephyr_udc0: &usbotg_hs {
 	pinctrl-0 = <&usb_otg_hs_dm_pa11 &usb_otg_hs_dp_pa12>;
 	pinctrl-names = "default";
diff --git a/boards/st/nucleo_h743zi/nucleo_h743zi.dts b/boards/st/nucleo_h743zi/nucleo_h743zi.dts
index ad88d87f0599f35..a16b08f91020c97 100644
--- a/boards/st/nucleo_h743zi/nucleo_h743zi.dts
+++ b/boards/st/nucleo_h743zi/nucleo_h743zi.dts
@@ -187,11 +187,9 @@ zephyr_udc0: &usbotg_fs {
  */
 &mac {
 	status = "okay";
-	pinctrl-0 = <&eth_mdc_pc1
-		     &eth_rxd0_pc4
+	pinctrl-0 = <&eth_rxd0_pc4
 		     &eth_rxd1_pc5
 		     &eth_ref_clk_pa1
-		     &eth_mdio_pa2
 		     &eth_crs_dv_pa7
 		     &eth_tx_en_pg11
 		     &eth_txd0_pg13
@@ -199,6 +197,18 @@ zephyr_udc0: &usbotg_fs {
 	pinctrl-names = "default";
 };
 
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&eth_mdio_pa2 &eth_mdc_pc1>;
+	pinctrl-names = "default";
+
+	ethernet-phy@0 {
+		compatible = "generic-phy";
+		reg = <0x00>;
+		status = "okay";
+	};
+};
+
 &spi1 {
 	status = "okay";
 	pinctrl-0 = <&spi1_sck_pa5 &spi1_miso_pa6 &spi1_mosi_pb5>;
diff --git a/boards/st/nucleo_h745zi_q/nucleo_h745zi_q_stm32h745xx_m7.dts b/boards/st/nucleo_h745zi_q/nucleo_h745zi_q_stm32h745xx_m7.dts
index cf22a60ad2abd7e..2c2785afec86eb0 100644
--- a/boards/st/nucleo_h745zi_q/nucleo_h745zi_q_stm32h745xx_m7.dts
+++ b/boards/st/nucleo_h745zi_q/nucleo_h745zi_q_stm32h745xx_m7.dts
@@ -107,9 +107,7 @@
 &mac {
 	status = "okay";
 	pinctrl-0 = <&eth_ref_clk_pa1
-		     &eth_mdio_pa2
 		     &eth_crs_dv_pa7
-		     &eth_mdc_pc1
 		     &eth_rxd0_pc4
 		     &eth_rxd1_pc5
 		     &eth_tx_en_pg11
@@ -118,6 +116,18 @@
 	pinctrl-names = "default";
 };
 
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&eth_mdio_pa2 &eth_mdc_pc1>;
+	pinctrl-names = "default";
+
+	ethernet-phy@0 {
+		compatible = "generic-phy";
+		reg = <0x00>;
+		status = "okay";
+	};
+};
+
 &rng {
 	status = "okay";
 };
diff --git a/boards/st/nucleo_h753zi/nucleo_h753zi.dts b/boards/st/nucleo_h753zi/nucleo_h753zi.dts
index 701cf4276f3041d..aba8cde9ffcea59 100644
--- a/boards/st/nucleo_h753zi/nucleo_h753zi.dts
+++ b/boards/st/nucleo_h753zi/nucleo_h753zi.dts
@@ -164,11 +164,9 @@ zephyr_udc0: &usbotg_fs {
  */
 &mac {
 	status = "okay";
-	pinctrl-0 = <&eth_mdc_pc1
-		     &eth_rxd0_pc4
+	pinctrl-0 = <&eth_rxd0_pc4
 		     &eth_rxd1_pc5
 		     &eth_ref_clk_pa1
-		     &eth_mdio_pa2
 		     &eth_crs_dv_pa7
 		     &eth_tx_en_pg11
 		     &eth_txd0_pg13
@@ -176,6 +174,18 @@ zephyr_udc0: &usbotg_fs {
 	pinctrl-names = "default";
 };
 
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&eth_mdio_pa2 &eth_mdc_pc1>;
+	pinctrl-names = "default";
+
+	ethernet-phy@0 {
+		compatible = "generic-phy";
+		reg = <0x00>;
+		status = "okay";
+	};
+};
+
 &spi1 {
 	status = "okay";
 	pinctrl-0 = <&spi1_sck_pa5 &spi1_miso_pa6 &spi1_mosi_pb5>;
diff --git a/boards/st/stm32h573i_dk/stm32h573i_dk.dts b/boards/st/stm32h573i_dk/stm32h573i_dk.dts
index 30401d7493ab2a2..e8ae32146f475b8 100644
--- a/boards/st/stm32h573i_dk/stm32h573i_dk.dts
+++ b/boards/st/stm32h573i_dk/stm32h573i_dk.dts
@@ -149,11 +149,9 @@
 
 &mac {
 	status = "okay";
-	pinctrl-0 = <&eth_mdc_pc1
-		     &eth_rxd0_pc4
+	pinctrl-0 = <&eth_rxd0_pc4
 		     &eth_rxd1_pc5
 		     &eth_ref_clk_pa1
-		     &eth_mdio_pa2
 		     &eth_crs_dv_pa7
 		     &eth_tx_en_pg11
 		     &eth_txd0_pg13
@@ -161,6 +159,18 @@
 	pinctrl-names = "default";
 };
 
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&eth_mdio_pa2 &eth_mdc_pc1>;
+	pinctrl-names = "default";
+
+	ethernet-phy@0 {
+		compatible = "generic-phy";
+		reg = <0x00>;
+		status = "okay";
+	};
+};
+
 &flash0 {
 	partitions {
 		compatible = "fixed-partitions";
diff --git a/boards/st/stm32h735g_disco/stm32h735g_disco.dts b/boards/st/stm32h735g_disco/stm32h735g_disco.dts
index cc504a4a6c3b70e..3c202e116ad95ad 100644
--- a/boards/st/stm32h735g_disco/stm32h735g_disco.dts
+++ b/boards/st/stm32h735g_disco/stm32h735g_disco.dts
@@ -130,11 +130,9 @@
 };
 
 &mac {
-	pinctrl-0 = <&eth_mdc_pc1
-		     &eth_rxd0_pc4
+	pinctrl-0 = <&eth_rxd0_pc4
 		     &eth_rxd1_pc5
 		     &eth_ref_clk_pa1
-		     &eth_mdio_pa2
 		     &eth_crs_dv_pa7
 		     &eth_tx_en_pb11
 		     &eth_txd0_pb12
@@ -143,6 +141,18 @@
 	status = "okay";
 };
 
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&eth_mdio_pa2 &eth_mdc_pc1>;
+	pinctrl-names = "default";
+
+	ethernet-phy@0 {
+		compatible = "generic-phy";
+		reg = <0x00>;
+		status = "okay";
+	};
+};
+
 &sdmmc1 {
 	pinctrl-0 = <&sdmmc1_d0_pc8
 		     &sdmmc1_d1_pc9