[PATCH 14/15] arm64: dts: renesas: Add Gray Hawk Single board support

[Geert Uytterhoeven]

Add initial support for the Renesas Gray Hawk Single board, which is
based on the R-Car V4M (R8A779H0) SoC:
  - Memory,
  - Crystal oscillators,
  - Serial console.

Based on the White Hawk Single DTS, and on a patch for the Gray Hawk
board stack in the BSP by Hai Pham.

Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
An alternative naming candidate would be "r8a779h0-gray-hawk-s.dts".

As the Gray Hawk and White Hawk board stacks share all boards except for
the CPU board, we might be able to reuse white-hawk-common.dtsi[1] once
all needed SoC support has been added to r8a779h0.dtsi.

[1] "[PATCH/RFC 0/7] arm64: dts: renesas: Add support for more R-Car V4H
     and White Hawk variants"
    https://lore.kernel.org/all/cover.1702309604.git.geert+renesas@glider.be
---
 arch/arm64/boot/dts/renesas/Makefile          |  2 +
 .../dts/renesas/r8a779h0-gray-hawk-single.dts | 52 +++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts

diff --git a/arch/arm64/boot/dts/renesas/Makefile b/arch/arm64/boot/dts/renesas/Makefile
index 8ea68d5827105b76..34d7c2262260f220 100644
--- a/arch/arm64/boot/dts/renesas/Makefile
+++ b/arch/arm64/boot/dts/renesas/Makefile
@@ -86,6 +86,8 @@ dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g0-white-hawk-ard-audio-da7212.dtbo
 r8a779g0-white-hawk-ard-audio-da7212-dtbs := r8a779g0-white-hawk.dtb r8a779g0-white-hawk-ard-audio-da7212.dtbo
 dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g0-white-hawk-ard-audio-da7212.dtb
 
+dtb-$(CONFIG_ARCH_R8A779H0) += r8a779h0-gray-hawk-single.dtb
+
 dtb-$(CONFIG_ARCH_R8A77951) += r8a779m1-salvator-xs.dtb
 r8a779m1-salvator-xs-panel-aa104xd12-dtbs := r8a779m1-salvator-xs.dtb salvator-panel-aa104xd12.dtbo
 dtb-$(CONFIG_ARCH_R8A77951) += r8a779m1-salvator-xs-panel-aa104xd12.dtb
diff --git a/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts b/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts
new file mode 100644
index 0000000000000000..fe3863cbf69d8454
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Source for the Gray Hawk Single board
+ *
+ * Copyright (C) 2023 Renesas Electronics Corp.
+ * Copyright (C) 2024 Glider bv
+ */
+
+/dts-v1/;
+#include "r8a779h0.dtsi"
+
+/ {
+	model = "Renesas Gray Hawk Single board based on r8a779h0";
+	compatible = "renesas,gray-hawk-single", "renesas,r8a779h0";
+
+	aliases {
+		serial0 = &hscif0;
+	};
+
+	chosen {
+		bootargs = "ignore_loglevel";
+		stdout-path = "serial0:921600n8";
+	};
+
+	memory at 48000000 {
+		device_type = "memory";
+		/* first 128MB is reserved for secure area. */
+		reg = <0x0 0x48000000 0x0 0x78000000>;
+	};
+
+	memory at 480000000 {
+		device_type = "memory";
+		reg = <0x4 0x80000000 0x1 0x80000000>;
+	};
+};
+
+&extal_clk {
+	clock-frequency = <16666666>;
+};
+
+&extalr_clk {
+	clock-frequency = <32768>;
+};
+
+&hscif0 {
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&scif_clk {
+	clock-frequency = <24000000>;
+};
-- 
2.34.1