avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/br4/Kconfig

@@ -0,0 +1,9 @@
+if TARGET_BR4
+
+config SYS_BOARD
+	default "br4"
+
+config SYS_CONFIG_NAME
+	default "br4"
+
+endif

u-boot/board/br4/MAINTAINERS

@@ -0,0 +1,6 @@
+BR4 BOARD
+M:	Dimitar Penev <dpn@switchfin.org>
+S:	Maintained
+F:	board/br4/
+F:	include/configs/br4.h
+F:	configs/br4_defconfig

u-boot/board/br4/Makefile

@@ -0,0 +1,14 @@
+#
+# U-Boot - Makefile
+#
+# Copyright (c) Switchfin Org. <dpn@switchfin.org>
+#
+# Copyright (c) 2005-2007 Analog Device Inc.
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= br4.o

u-boot/board/br4/br4.c

@@ -0,0 +1,30 @@
+/*
+ * U-Boot - main board file
+ *
+ * Copyright (c) Switchfin Org. <dpn@switchfin.org>
+ *
+ * Copyright (c) 2005-2008 Analog Devices Inc.
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <net.h>
+#include <netdev.h>
+
+int checkboard(void)
+{
+	printf("Board: Switchvoice BR4 Appliance\n");
+	printf("       Support: http://www.switchvoice.com/\n");
+	return 0;
+}
+
+#ifdef CONFIG_BFIN_MAC
+int board_eth_init(bd_t *bis)
+{
+	return bfin_EMAC_initialize(bis);
+}
+#endif