arm64: dts: ls1028a: sl28: add support for variant 2

Now that there is support for the Felix switch this variant can also be
added. It features two external ports ethernet ports which are connected
to the internal switch core. No direct connection to any of the enetc's
is supported.
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-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-sl28-var2.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-sl28-var3-ads2.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-kontron-sl28-var4.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-qds.dtb

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

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Device Tree file for the Kontron SMARC-sAL28 board.
+ *
+ * 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>
+ *
+ */
+
+/dts-v1/;
+#include "fsl-ls1028a-kontron-sl28.dts"
+
+/ {
+	model = "Kontron SMARC-sAL28 (TSN-on-module)";
+	compatible = "kontron,sl28-var2", "kontron,sl28", "fsl,ls1028a";
+};
+
+&enetc_mdio_pf3 {
+	phy0: ethernet-phy@5 {
+		reg = <0x5>;
+		eee-broken-1000t;
+		eee-broken-100tx;
+	};
+
+	phy1: ethernet-phy@4 {
+		reg = <0x4>;
+		eee-broken-1000t;
+		eee-broken-100tx;
+	};
+};
+
+&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.
+	 */
+	/delete-property/ phy-handle;
+	/delete-node/ mdio;
+};
+
+&enetc_port2 {
+	status = "okay";
+};
+
+&mscc_felix_port0 {
+	label = "gbe0";
+	phy-handle = <&phy0>;
+	phy-mode = "sgmii";
+	status = "okay";
+};
+
+&mscc_felix_port1 {
+	label = "gbe1";
+	phy-handle = <&phy1>;
+	phy-mode = "sgmii";
+	status = "okay";
+};
+
+&mscc_felix_port4 {
+	ethernet = <&enetc_port2>;
+	status = "okay";
+};