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/dts/sun4i-a10-pcduino2.dts

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2015 Siarhei Siamashka <siarhei.siamashka@gmail.com>
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This file is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of the
+ *     License, or (at your option) any later version.
+ *
+ *     This file is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ * Or, alternatively,
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * The LinkSprite pcDuino2 board is almost identical to the older
+ * LinkSprite pcDuino1 board. The only software visible difference
+ * is that the pcDuino2 board got a USB VBUS voltage regulator, which
+ * is controlled by the PD2 pin (pulled-up by default). Also one of
+ * the USB host ports has been replaced with a USB WIFI chip.
+ */
+
+#include "sun4i-a10-pcduino.dts"
+
+/ {
+	model = "LinkSprite pcDuino2";
+	compatible = "linksprite,a10-pcduino2", "allwinner,sun4i-a10";
+};
+
+&pio {
+	usb2_vbus_pin_pcduino2: usb2_vbus_pin@0 {
+		allwinner,pins = "PD2";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+};
+
+&reg_usb2_vbus {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usb2_vbus_pin_pcduino2>;
+	gpio = <&pio 3 2 GPIO_ACTIVE_HIGH>;
+	status = "okay";
+};
+
+&usbphy {
+	usb1_vbus-supply = <&reg_vcc3v3>; /* USB WIFI is always on */
+	usb2_vbus-supply = <&reg_usb2_vbus>;
+	status = "okay";
+};