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 <redacted>
---
 arch/arm64/boot/dts/freescale/Makefile        |  1 +
 .../fsl-ls1028a-kontron-sl28-var1.dts         | 61 +++++++++++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 6f0777ee6cd6..79cb0025fcc6 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/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

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts
new file mode 100644
index 000000000000..52f2f3ffdce1
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts

@@ -0,0 +1,61 @@
+// 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-property/ phy-handle;
+	/delete-node/ mdio;