diff --git a/boards/sensry/ganymed_bob/ganymed_bob_sy120-pinctrl.dtsi b/boards/sensry/ganymed_bob/ganymed_bob_sy120-pinctrl.dtsi
index 5e105da6d420..06edebcc7768 100644
--- a/boards/sensry/ganymed_bob/ganymed_bob_sy120-pinctrl.dtsi
+++ b/boards/sensry/ganymed_bob/ganymed_bob_sy120-pinctrl.dtsi
@@ -55,6 +55,15 @@
 		bias-pull-up;
 	};
 
+	/* MDIO */
+	/omit-if-no-ref/ mdio_io: mdio_io {
+		pinmux = <SY1XX_RGMII0_PAD_CFG3 SY1XX_PAD(0)>;
+		input-enable;
+	};
+
+	/omit-if-no-ref/ mdio_clk: mdio_clk {
+		pinmux = <SY1XX_RGMII0_PAD_CFG3 SY1XX_PAD(1)>;
+	};
 };
 
 
diff --git a/boards/sensry/ganymed_bob/ganymed_bob_sy120_gbm.dts b/boards/sensry/ganymed_bob/ganymed_bob_sy120_gbm.dts
index 4deba1e0e4fd..5a00bdbbba24 100644
--- a/boards/sensry/ganymed_bob/ganymed_bob_sy120_gbm.dts
+++ b/boards/sensry/ganymed_bob/ganymed_bob_sy120_gbm.dts
@@ -3,6 +3,8 @@
 
 /dts-v1/;
 
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
 #include <sensry/ganymed-sy1xx.dtsi>
 #include "ganymed_bob_sy120-pinctrl.dtsi"
 
@@ -16,3 +18,20 @@
 	};
 
 };
+
+&mdio0 {
+	status = "okay";
+
+	pinctrl-0 = <&mdio_clk &mdio_io>;
+	pinctrl-names = "default";
+
+	pyh0: phy@0 {
+		compatible = "microchip,vsc8541";
+		reg = <0x0>;
+		status = "okay";
+
+		reset-gpios = <&gpio0 11 GPIO_ACTIVE_HIGH>;
+
+		microchip,interface-type = "rgmii";
+	};
+};
diff --git a/boards/sensry/ganymed_bob/ganymed_bob_sy120_gen1.dts b/boards/sensry/ganymed_bob/ganymed_bob_sy120_gen1.dts
index 4deba1e0e4fd..5a00bdbbba24 100644
--- a/boards/sensry/ganymed_bob/ganymed_bob_sy120_gen1.dts
+++ b/boards/sensry/ganymed_bob/ganymed_bob_sy120_gen1.dts
@@ -3,6 +3,8 @@
 
 /dts-v1/;
 
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
 #include <sensry/ganymed-sy1xx.dtsi>
 #include "ganymed_bob_sy120-pinctrl.dtsi"
 
@@ -16,3 +18,20 @@
 	};
 
 };
+
+&mdio0 {
+	status = "okay";
+
+	pinctrl-0 = <&mdio_clk &mdio_io>;
+	pinctrl-names = "default";
+
+	pyh0: phy@0 {
+		compatible = "microchip,vsc8541";
+		reg = <0x0>;
+		status = "okay";
+
+		reset-gpios = <&gpio0 11 GPIO_ACTIVE_HIGH>;
+
+		microchip,interface-type = "rgmii";
+	};
+};