ARM: dts: renesas: Add RZ/A1 GR-Peach board

Add board code and DTs for Renesas RZ/A1 SoC-based GR-Peach,
which is a cheap development platform with RZ/A1H SoC. The
DTs are imported from Linux 5.0.11, commit d5a2675b207d .

Currently supported are UART, ethernet and RPC SPI. The board
can be booted from RPC SPI by writing the u-boot.bin binary
to the beginning of the SPI NOR, e.g. using the "sf" command.
The board can also be booted via JTAG by setting text base to
0x20020000, loading u-boot.bin there via JTAG and executing it
from that address.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/dts/r7s72100-gr-peach-u-boot.dts b/arch/arm/dts/r7s72100-gr-peach-u-boot.dts
new file mode 100644
index 0000000..28247d1
--- /dev/null
+++ b/arch/arm/dts/r7s72100-gr-peach-u-boot.dts
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source extras for U-Boot for the GR Peach board
+ *
+ * Copyright (C) 2019 Marek Vasut <marek.vasut@gmail.com>
+ */
+
+#include "r7s72100-gr-peach.dts"
+
+/ {
+	aliases {
+		spi0 = &rpc;
+	};
+
+	soc {
+		u-boot,dm-pre-reloc;
+	};
+
+	leds {
+		led1 {
+			label = "peach:bottom:red";
+		};
+
+		led-red {
+			label = "peach:tri:red";
+			gpios = <&port6 13 GPIO_ACTIVE_HIGH>;
+		};
+
+		led-green {
+			label = "peach:tri:green";
+			gpios = <&port6 14 GPIO_ACTIVE_HIGH>;
+		};
+
+		led-blue {
+			label = "peach:tri:blue";
+			gpios = <&port6 15 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	rpc: rpc@0xee200000 {
+		compatible = "renesas,rpc-r7s72100", "renesas,rpc";
+		reg = <0x3fefa000 0x100>, <0x18000000 0x08000000>;
+		bank-width = <2>;
+		num-cs = <1>;
+		status = "okay";
+		spi-max-frequency = <50000000>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		flash0: spi-flash@0 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "jedec,spi-nor";
+			spi-max-frequency = <50000000>;
+			spi-tx-bus-width = <1>;
+			spi-rx-bus-width = <1>;
+			reg = <0>;
+			status = "okay";
+		};
+	};
+};
+
+&ostm0 {
+	u-boot,dm-pre-reloc;
+};
+
+&pinctrl {
+	u-boot,dm-pre-reloc;
+};
+
+&scif2 {
+	u-boot,dm-pre-reloc;
+	clock = <66666666>;	/* ToDo: Replace by DM clock driver */
+};
+
+&scif2_pins {
+	u-boot,dm-pre-reloc;
+};