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/arch/arm/mach-uniphier/sbc/sbc-pxs2.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2015-2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <linux/io.h>
+
+#include "../init.h"
+#include "sbc-regs.h"
+
+int uniphier_pxs2_sbc_init(const struct uniphier_board_data *bd)
+{
+	/* necessary for ROM boot ?? */
+	/* system bus output enable */
+	writel(0x17, PC0CTRL);
+
+	return 0;
+}