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/include/dm/platdata.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2013 Google, Inc
+ *
+ * (C) Copyright 2012
+ * Pavel Herrmann <morpheus.ibis@gmail.com>
+ * Marek Vasut <marex@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _DM_PLATDATA_H
+#define _DM_PLATDATA_H
+
+#include <linker_lists.h>
+
+/**
+ * struct driver_info - Information required to instantiate a device
+ *
+ * NOTE: Avoid using this except in extreme circumstances, where device tree
+ * is not feasible (e.g. serial driver in SPL where <8KB of SRAM is
+ * available). U-Boot's driver model uses device tree for configuration.
+ *
+ * @name:	Driver name
+ * @platdata:	Driver-specific platform data
+ */
+struct driver_info {
+	const char *name;
+	const void *platdata;
+};
+
+/**
+ * NOTE: Avoid using these except in extreme circumstances, where device tree
+ * is not feasible (e.g. serial driver in SPL where <8KB of SRAM is
+ * available). U-Boot's driver model uses device tree for configuration.
+ */
+#define U_BOOT_DEVICE(__name)						\
+	ll_entry_declare(struct driver_info, __name, driver_info)
+
+/* Declare a list of devices. The argument is a driver_info[] array */
+#define U_BOOT_DEVICES(__name)						\
+	ll_entry_declare_list(struct driver_info, __name, driver_info)
+
+#endif