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/linux/usb/otg.h

@@ -0,0 +1,29 @@
+/* include/linux/usb/otg.h
+ *
+ * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * USB OTG (On The Go) defines
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __LINUX_USB_OTG_H
+#define __LINUX_USB_OTG_H
+
+enum usb_dr_mode {
+	USB_DR_MODE_UNKNOWN,
+	USB_DR_MODE_HOST,
+	USB_DR_MODE_PERIPHERAL,
+	USB_DR_MODE_OTG,
+};
+
+/**
+ * usb_get_dr_mode() - Get dual role mode for given device
+ * @node: Node offset to the given device
+ *
+ * The function gets phy interface string from property 'dr_mode',
+ * and returns the correspondig enum usb_dr_mode
+ */
+enum usb_dr_mode usb_get_dr_mode(int node);
+
+#endif /* __LINUX_USB_OTG_H */