arm64: dts: freescale: sl28: add variant 1

There is a new variant 1 of this board available. It features up to four
SerDes lanes for customer use. Add a new device tree which features just
the basic peripherals. A customer will then have to modify or append to
this device tree.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/Makefile

@@ -6,6 +6,7 @@ dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1012a-qds.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1012a-rdb.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-kbox-a-230-ls.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-sl28.dtb
+dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-sl28-var1.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-sl28-var2.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-sl28-var3-ads2.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-sl28-var4.dtb

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

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Device Tree file for the Kontron SMARC-sAL28 board.
+ *
+ * This is for the network variant 1 which has one ethernet port. It is
+ * different than the base variant, which also has one port, but here the
+ * port is connected via RGMII. This port is not TSN aware.
+ * 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>
+ *
+ */
+
+/dts-v1/;
+#include "fsl-ls1028a-kontron-sl28.dts"
+#include <dt-bindings/net/qca-ar803x.h>
+
+/ {
+	model = "Kontron SMARC-sAL28 (4 Lanes)";
+	compatible = "kontron,sl28-var1", "kontron,sl28", "fsl,ls1028a";
+};
+
+&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-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>;
+			vddio-supply = <&vddh>;
+
+			vddio: vddio-regulator {
+				regulator-name = "VDDIO";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+			};
+
+			vddh: vddh-regulator {
+				regulator-name = "VDDH";
+			};
+		};
+	};
+};