[PATCH v2 8/9] arm64: dts: renesas: Add HiHope RZ/G2M v3.0 SoC main board support

[Ayman Chaudhry <ayman.chaudhry.kc@renesas.com>]

Add support for the HiHope RZ/G2M v3.0 (a.k.a. R8A774A3) SoC main
board.

The RZ/G2M v3.0 SoC main board is similar to the RZ/G2M v1.3 SoC main
board, so there are already DTSI files available in the kernel. These
DTSI files will be included once additional support (e.g. I2C, GPIO
and sound) is added for the RZ/G2M v3.0 SoC.

Signed-off-by: Ayman Chaudhry <ayman.chaudhry.kc@renesas.com>
---
v1->v2:
- Dropped bootargs from chosen.
- Updated licensing to "GPL-2.0-only OR BSD-2-Clause"

 arch/arm64/boot/dts/renesas/Makefile          |  2 +
 .../dts/renesas/r8a774a3-hihope-rzg2m.dts     | 49 +++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 arch/arm64/boot/dts/renesas/r8a774a3-hihope-rzg2m.dts

diff --git a/arch/arm64/boot/dts/renesas/Makefile b/arch/arm64/boot/dts/renesas/Makefile
index b742baf509a1..9817f3ada6f9 100644
--- a/arch/arm64/boot/dts/renesas/Makefile
+++ b/arch/arm64/boot/dts/renesas/Makefile
@@ -8,6 +8,8 @@ dtb-$(CONFIG_ARCH_R8A774A1) += r8a774a1-hihope-rzg2m-rev2.dtb
 dtb-$(CONFIG_ARCH_R8A774A1) += r8a774a1-hihope-rzg2m-rev2-ex.dtb
 dtb-$(CONFIG_ARCH_R8A774A1) += r8a774a1-hihope-rzg2m-rev2-ex-idk-1110wr.dtb
 
+dtb-$(CONFIG_ARCH_R8A774A3) += r8a774a3-hihope-rzg2m.dtb
+
 dtb-$(CONFIG_ARCH_R8A774B1) += r8a774b1-beacon-rzg2n-kit.dtb
 dtb-$(CONFIG_ARCH_R8A774B1) += r8a774b1-hihope-rzg2n.dtb
 dtb-$(CONFIG_ARCH_R8A774B1) += r8a774b1-hihope-rzg2n-ex.dtb
diff --git a/arch/arm64/boot/dts/renesas/r8a774a3-hihope-rzg2m.dts b/arch/arm64/boot/dts/renesas/r8a774a3-hihope-rzg2m.dts
new file mode 100644
index 000000000000..cd46af2a924a
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r8a774a3-hihope-rzg2m.dts
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+/*
+ * Device Tree Source for the HiHope RZ/G2M v3.0 SoC main board
+ *
+ *Copyright (C) 2026 Renesas Electronics Corp.
+ */
+
+/dts-v1/;
+#include "r8a774a3.dtsi"
+
+/ {
+	model = "HopeRun HiHope RZ/G2M v3.0 main board based on r8a774a3";
+	compatible = "hoperun,hihope-rzg2m", "renesas,r8a774a3";
+
+	memory@48000000 {
+		device_type = "memory";
+		/* First 128MiB is reserved for secure area */
+		reg = <0x0 0x48000000 0x0 0x78000000>;
+	};
+
+	memory@600000000 {
+		device_type = "memory";
+		reg = <0x6 0x00000000 0x0 0x80000000>;
+	};
+
+	aliases {
+		serial0 = &scif2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&extal_clk {
+	clock-frequency = <16666666>;
+};
+
+&extalr_clk {
+	clock-frequency = <32768>;
+};
+
+&scif2 {
+	status = "okay";
+};
+
+&scif_clk {
+	clock-frequency = <14745600>;
+};
-- 
2.34.1