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/drivers/misc/sysreset-uclass.c

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <sysreset.h>
+#include <dm.h>
+#include <errno.h>
+#include <regmap.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dm/root.h>
+#include <linux/err.h>
+
+int sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+	struct sysreset_ops *ops = sysreset_get_ops(dev);
+
+	if (!ops->request)
+		return -ENOSYS;
+
+	return ops->request(dev, type);
+}
+
+int sysreset_walk(enum sysreset_t type)
+{
+	struct udevice *dev;
+	int ret = -ENOSYS;
+
+	while (ret != -EINPROGRESS && type < SYSRESET_COUNT) {
+		for (uclass_first_device(UCLASS_SYSRESET, &dev);
+		     dev;
+		     uclass_next_device(&dev)) {
+			ret = sysreset_request(dev, type);
+			if (ret == -EINPROGRESS)
+				break;
+		}
+		type++;
+	}
+
+	return ret;
+}
+
+void sysreset_walk_halt(enum sysreset_t type)
+{
+	int ret;
+
+	ret = sysreset_walk(type);
+
+	/* Wait for the reset to take effect */
+	if (ret == -EINPROGRESS)
+		mdelay(100);
+
+	/* Still no reset? Give up */
+	debug("System reset not supported on this platform\n");
+	hang();
+}
+
+/**
+ * reset_cpu() - calls sysreset_walk(SYSRESET_WARM)
+ */
+void reset_cpu(ulong addr)
+{
+	sysreset_walk_halt(SYSRESET_WARM);
+}
+
+
+int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	sysreset_walk_halt(SYSRESET_WARM);
+
+	return 0;
+}
+
+UCLASS_DRIVER(sysreset) = {
+	.id		= UCLASS_SYSRESET,
+	.name		= "sysreset",
+};