diff --git a/arch/arm/dts/r8a779h0-gray-hawk-single-u-boot.dtsi b/arch/arm/dts/r8a779h0-gray-hawk-single-u-boot.dtsi
new file mode 100644
index 00000000000..91e1ee1f890
--- /dev/null
+++ b/arch/arm/dts/r8a779h0-gray-hawk-single-u-boot.dtsi
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source extras for U-Boot for the Gray Hawk board
+ *
+ * Copyright (C) 2025 Renesas Electronics Corp.
+ */
+
+#include "r8a779h0-u-boot.dtsi"
+
+/ {
+	aliases {
+		spi0 = &rpc;
+	};
+};
+
+&pfc {
+	qspi0_pins: qspi0 {
+		groups = "qspi0_ctrl", "qspi0_data4";
+		function = "qspi0";
+	};
+};
+
+&rpc {
+	pinctrl-0 = <&qspi0_pins>;
+	pinctrl-names = "default";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+	spi-max-frequency = <40000000>;
+	status = "okay";
+
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "s25fs512s", "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+		spi-tx-bus-width = <1>;
+		spi-rx-bus-width = <1>;
+	};
+};
diff --git a/arch/arm/dts/r8a779h0-u-boot.dtsi b/arch/arm/dts/r8a779h0-u-boot.dtsi
new file mode 100644
index 00000000000..40e070be9a8
--- /dev/null
+++ b/arch/arm/dts/r8a779h0-u-boot.dtsi
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source extras for U-Boot on R-Car R8A779H0 SoC
+ *
+ * Copyright (C) 2025 Renesas Electronics Corp.
+ */
+
+&rpc {
+	bank-width = <2>;
+	num-cs = <1>;
+};