ARM: dts: aspeed: Add Rainier system

Rainier is a new IBM server with POWER host processors and an AST2600
BMC.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/Makefile

@@ -1288,6 +1288,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-bmc-facebook-wedge40.dtb \
 	aspeed-bmc-facebook-wedge100.dtb \
 	aspeed-bmc-facebook-yamp.dtb \
+	aspeed-bmc-ibm-rainier.dtb \
 	aspeed-bmc-intel-s2600wf.dtb \
 	aspeed-bmc-inspur-fp5280g2.dtb \
 	aspeed-bmc-lenovo-hr630.dtb \

arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts

@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright 2019 IBM Corp.
+/dts-v1/;
+
+#include "aspeed-g6.dtsi"
+
+/ {
+	model = "Rainier";
+	compatible = "ibm,rainier-bmc", "aspeed,ast2600";
+
+	aliases {
+		serial4 = &uart5;
+	};
+
+	chosen {
+		stdout-path = &uart5;
+		bootargs = "console=ttyS4,115200n8";
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x80000000 0x40000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		flash_memory: region@B8000000 {
+			no-map;
+			reg = <0xB8000000 0x04000000>; /* 64M */
+		};
+	};
+
+};
+
+&emmc_controller {
+	status = "okay";
+};
+
+&emmc {
+	status = "okay";
+};
+
+&ibt {
+	status = "okay";
+};
+
+&lpc_ctrl {
+	status = "okay";
+	memory-region = <&flash_memory>;
+};