arm64: dts: ls1028a: move PHY nodes to MDIO controller

Move the PHY nodes from the network controller to the dedicated MDIO
controller. According to Vladimir Oltean direct MDIO access via the PF,
that is when the PHY is put under the "mdio" subnode, is defeatured and
in fact the latest reference manual isn't mentioning it anymore.
Suggested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts

@@ -8,7 +8,7 @@
  * None of the  four SerDes lanes are used by the module, instead they are
  * all led out to the carrier for customer use.
  *
- * Copyright (C) 2020 Michael Walle <michael@walle.cc>
+ * Copyright (C) 2021 Michael Walle <michael@walle.cc>
  *
  */
 
@@ -21,43 +21,39 @@ / {
 	compatible = "kontron,sl28-var1", "kontron,sl28", "fsl,ls1028a";
 };
 
+&enetc_mdio_pf3 {
+	/* Delete unused phy node */
+	/delete-node/ ethernet-phy@5;
+
+	phy0: ethernet-phy@4 {
+		reg = <0x4>;
+		eee-broken-1000t;
+		eee-broken-100tx;
+		qca,clk-out-frequency = <125000000>;
+		qca,clk-out-strength = <AR803X_STRENGTH_FULL>;
+		qca,keep-pll-enabled;
+		vddio-supply = <&vddio>;
+
+		vddio: vddio-regulator {
+			regulator-name = "VDDIO";
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <1800000>;
+		};
+
+		vddh: vddh-regulator {
+			regulator-name = "VDDH";
+		};
+	};
+};
+
 &enetc_port0 {
 	status = "disabled";
-	/*
-	 * Delete both the phy-handle to the old phy0 label as well as
-	 * the mdio node with the old phy node with the old phy0 label.
-	 */
+	/* Delete the phy-handle to the old phy0 label */
 	/delete-property/ phy-handle;
-	/delete-node/ mdio;
 };
 
 &enetc_port1 {
 	phy-handle = <&phy0>;
 	phy-connection-type = "rgmii-id";
 	status = "okay";
-
-	mdio {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		phy0: ethernet-phy@4 {
-			reg = <0x4>;
-			eee-broken-1000t;
-			eee-broken-100tx;
-			qca,clk-out-frequency = <125000000>;
-			qca,clk-out-strength = <AR803X_STRENGTH_FULL>;
-			qca,keep-pll-enabled;
-			vddio-supply = <&vddio>;
-
-			vddio: vddio-regulator {
-				regulator-name = "VDDIO";
-				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <1800000>;
-			};
-
-			vddh: vddh-regulator {
-				regulator-name = "VDDH";
-			};
-		};
-	};
 };

arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var2.dts

@@ -5,7 +5,7 @@
  * This is for the network variant 2 which has two ethernet ports. These
  * ports are connected to the internal switch.
  *
- * Copyright (C) 2020 Michael Walle <michael@walle.cc>
+ * Copyright (C) 2021 Michael Walle <michael@walle.cc>
  *
  */
 
@@ -18,12 +18,6 @@ / {
 };
 
 &enetc_mdio_pf3 {
-	phy0: ethernet-phy@5 {
-		reg = <0x5>;
-		eee-broken-1000t;
-		eee-broken-100tx;
-	};
-
 	phy1: ethernet-phy@4 {
 		reg = <0x4>;
 		eee-broken-1000t;
@@ -34,14 +28,11 @@ phy1: ethernet-phy@4 {
 &enetc_port0 {
 	status = "disabled";
 	/*
-	 * In the base device tree the PHY was registered in the mdio
-	 * subnode as it is PHY for this port. On this module this PHY
-	 * is connected to a switch port instead and registered above.
-	 * Therefore, delete the mdio subnode as well as the phy-handle
-	 * property here.
+	 * In the base device tree the PHY at address 5 was assigned for
+	 * this port. On this module this PHY is connected to a switch
+	 * port instead. Therefore, delete the phy-handle property here.
 	 */
 	/delete-property/ phy-handle;
-	/delete-node/ mdio;
 };
 
 &enetc_port2 {

arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var4.dts

@@ -5,7 +5,7 @@
  * This is for the network variant 4 which has two ethernet ports. It
  * extends the base and provides one more port connected via RGMII.
  *
- * Copyright (C) 2019 Michael Walle <michael@walle.cc>
+ * Copyright (C) 2021 Michael Walle <michael@walle.cc>
  *
  */
 
@@ -18,33 +18,30 @@ / {
 	compatible = "kontron,sl28-var4", "kontron,sl28", "fsl,ls1028a";
 };
 
-&enetc_port1 {
-	phy-handle = <&phy1>;
-	phy-connection-type = "rgmii-id";
-	status = "okay";
+&enetc_mdio_pf3 {
+	phy1: ethernet-phy@4 {
+		reg = <0x4>;
+		eee-broken-1000t;
+		eee-broken-100tx;
+		qca,clk-out-frequency = <125000000>;
+		qca,clk-out-strength = <AR803X_STRENGTH_FULL>;
+		qca,keep-pll-enabled;
+		vddio-supply = <&vddio>;
 
-	mdio {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		phy1: ethernet-phy@4 {
-			reg = <0x4>;
-			eee-broken-1000t;
-			eee-broken-100tx;
-			qca,clk-out-frequency = <125000000>;
-			qca,clk-out-strength = <AR803X_STRENGTH_FULL>;
-			qca,keep-pll-enabled;
-			vddio-supply = <&vddio>;
-
-			vddio: vddio-regulator {
-				regulator-name = "VDDIO";
-				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <1800000>;
-			};
+		vddio: vddio-regulator {
+			regulator-name = "VDDIO";
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <1800000>;
+		};
 
-			vddh: vddh-regulator {
-				regulator-name = "VDDH";
-			};
+		vddh: vddh-regulator {
+			regulator-name = "VDDH";
 		};
 	};
 };
+
+&enetc_port1 {
+	phy-handle = <&phy1>;
+	phy-connection-type = "rgmii-id";
+	status = "okay";
+};

arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts

@@ -2,7 +2,7 @@
 /*
  * Device Tree file for the Kontron SMARC-sAL28 board.
  *
- * Copyright (C) 2019 Michael Walle <michael@walle.cc>
+ * Copyright (C) 2021 Michael Walle <michael@walle.cc>
  *
  */
 
@@ -80,22 +80,19 @@ &duart1 {
 	status = "okay";
 };
 
+&enetc_mdio_pf3 {
+	phy0: ethernet-phy@5 {
+		reg = <0x5>;
+		eee-broken-1000t;
+		eee-broken-100tx;
+	};
+};
+
 &enetc_port0 {
 	phy-handle = <&phy0>;
 	phy-connection-type = "sgmii";
 	managed = "in-band-status";
 	status = "okay";
-
-	mdio {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		phy0: ethernet-phy@5 {
-			reg = <0x5>;
-			eee-broken-1000t;
-			eee-broken-100tx;
-		};
-	};
 };
 
 &esdhc {

arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts

@@ -197,6 +197,10 @@ &duart1 {
 };
 
 &enetc_mdio_pf3 {
+	sgmii_phy0: ethernet-phy@2 {
+		reg = <0x2>;
+	};
+
 	/* VSC8514 QSGMII quad PHY */
 	qsgmii_phy0: ethernet-phy@10 {
 		reg = <0x10>;
@@ -220,14 +224,6 @@ &enetc_port0 {
 	phy-connection-type = "sgmii";
 	managed = "in-band-status";
 	status = "okay";
-
-	mdio {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		sgmii_phy0: ethernet-phy@2 {
-			reg = <0x2>;
-		};
-	};
 };
 
 &enetc_port2 {