Add initial support for the Samsung Galaxy S20 5G (x1s/SM-G981B)
phone. It was launched in 2020, and it's based on the Exynos 990 SoC. It
has only one configuration with 12GB of RAM and 128GB of UFS 3.0 storage.

This device tree adds support for the following:

- SimpleFB
- 12GB RAM
- Buttons

Signed-off-by: Umer Uddin <umer.uddin@mentallysanemainliners.org>
---
 arch/arm64/boot/dts/exynos/Makefile          |  1 +
 arch/arm64/boot/dts/exynos/exynos990-x1s.dts | 23 ++++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 arch/arm64/boot/dts/exynos/exynos990-x1s.dts

diff --git a/arch/arm64/boot/dts/exynos/Makefile b/arch/arm64/boot/dts/exynos/Makefile
index 7a934499b..deb8dc509 100644
--- a/arch/arm64/boot/dts/exynos/Makefile
+++ b/arch/arm64/boot/dts/exynos/Makefile
@@ -9,5 +9,6 @@ dtb-$(CONFIG_ARCH_EXYNOS) += \
 	exynos850-e850-96.dtb		\
 	exynos8895-dreamlte.dtb		\
 	exynos990-c1s.dtb		\
+	exynos990-x1s.dtb		\
 	exynosautov9-sadk.dtb		\
 	exynosautov920-sadk.dtb
diff --git a/arch/arm64/boot/dts/exynos/exynos990-x1s.dts b/arch/arm64/boot/dts/exynos/exynos990-x1s.dts
new file mode 100644
index 000000000..f7b1afd0e
--- /dev/null
+++ b/arch/arm64/boot/dts/exynos/exynos990-x1s.dts
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Samsung Galaxy S20 5G (x1s/SM-G981B) device tree source
+ *
+ * Copyright (c) 2024, Umer Uddin <umer.uddin@mentallysanemainliners.org>
+ */
+
+/dts-v1/;
+#include "exynos990-hubble-common.dtsi"
+
+/ {
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	model = "Samsung Galaxy S20 5G";
+	compatible = "samsung,x1s", "samsung,exynos990";
+
+	memory@9fec00000 {
+		device_type = "memory";
+		reg = <0x9 0xfec00000 0x0 0x01400000>,
+		      <0xa 0x0 0x0 0xfe800000>;
+	};
+};
-- 
2.47.0