aspeed: Support for ast2500 Eval Board

ast2500 Eval Board device tree and board specific configuration.
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/Makefile

@@ -334,6 +334,8 @@ dtb-$(CONFIG_ARCH_BCM283X) += \
 	bcm2836-rpi-2-b.dtb \
 	bcm2837-rpi-3-b.dtb
 
+dtb-$(CONFIG_ARCH_ASPEED) += ast2500-evb.dtb
+
 targets += $(dtb-y)
 
 # Add any required device tree compiler flags here

arch/arm/dts/ast2500-evb.dts

@@ -0,0 +1,23 @@
+/dts-v1/;
+
+#include "ast2500-u-boot.dtsi"
+
+/ {
+	memory {
+		device_type = "memory";
+		reg = <0x80000000 0x20000000>;
+	};
+
+	chosen {
+		stdout-path = &uart5;
+	};
+};
+
+&uart5 {
+	u-boot,dm-pre-reloc;
+	status = "okay";
+};
+
+&sdrammc {
+	clock-frequency = <400000000>;
+};

arch/arm/mach-aspeed/ast2500/Kconfig

@@ -11,4 +11,6 @@ config TARGET_EVB_AST2500
 	  4 Serial ports, 4 USB ports, VGA port, PCIe, SD card slot,
 	  20 pin JTAG, pinouts for 14 I2Cs, 3 SPIs and eSPI, 8 PWMs.
 
+source "board/aspeed/evb_ast2500/Kconfig"
+
 endif