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/sun9i-a80-optimus.dts

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+/*
+ * Copyright 2014 Chen-Yu Tsai
+ *
+ * Chen-Yu Tsai <wens@csie.org>
+ *
+ * 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.
+ */
+
+/dts-v1/;
+#include "sun9i-a80.dtsi"
+#include "sunxi-common-regulators.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/sun4i-a10.h>
+
+/ {
+	model = "Merrii A80 Optimus Board";
+	compatible = "merrii,a80-optimus", "allwinner,sun9i-a80";
+
+	aliases {
+		serial0 = &uart0;
+		serial1 = &uart4;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&led_pins_optimus>, <&led_r_pins_optimus>;
+
+		/* The LED names match those found on the board */
+
+		led2 {
+			label = "optimus:led2:usr";
+			gpios = <&pio 7 1 GPIO_ACTIVE_HIGH>;
+		};
+
+		led3 {
+			label = "optimus:led3:usr";
+			gpios = <&r_pio 1 15 GPIO_ACTIVE_HIGH>; /* PM15 */
+		};
+
+		led4 {
+			label = "optimus:led4:usr";
+			gpios = <&pio 7 0 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	reg_usb3_vbus: usb3-vbus {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&usb3_vbus_pin_optimus>;
+		regulator-name = "usb3-vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		enable-active-high;
+		gpio = <&pio 7 5 GPIO_ACTIVE_HIGH>; /* PH5 */
+	};
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&ehci2 {
+	status = "okay";
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&ohci2 {
+	status = "okay";
+};
+
+&pio {
+	led_pins_optimus: led-pins@0 {
+		allwinner,pins = "PH0", "PH1";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+
+	mmc0_cd_pin_optimus: mmc0_cd_pin@0 {
+		allwinner,pins = "PH18";
+		allwinner,function = "gpio_in";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
+	};
+
+	usb1_vbus_pin_optimus: usb1_vbus_pin@1 {
+		allwinner,pins = "PH4";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+
+	usb3_vbus_pin_optimus: usb3_vbus_pin@1 {
+		allwinner,pins = "PH5";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins>, <&mmc0_cd_pin_optimus>;
+	vmmc-supply = <&reg_vcc3v0>;
+	bus-width = <4>;
+	cd-gpios = <&pio 7 18 GPIO_ACTIVE_HIGH>; /* PH8 */
+	cd-inverted;
+	status = "okay";
+};
+
+&mmc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc2_8bit_pins>;
+	vmmc-supply = <&reg_vcc3v0>;
+	bus-width = <8>;
+	non-removable;
+	cap-mmc-hw-reset;
+	status = "okay";
+};
+
+&mmc2_8bit_pins {
+	/* Increase drive strength for DDR modes */
+	allwinner,drive = <SUN4I_PINCTRL_40_MA>;
+};
+
+&reg_usb1_vbus {
+	pinctrl-0 = <&usb1_vbus_pin_optimus>;
+	gpio = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */
+	status = "okay";
+};
+
+&r_ir {
+	status = "okay";
+};
+
+&r_pio {
+	led_r_pins_optimus: led-pins@1 {
+		allwinner,pins = "PM15";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+};
+
+&r_rsb {
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins_a>;
+	status = "okay";
+};
+
+&usbphy1 {
+	phy-supply = <&reg_usb1_vbus>;
+	status = "okay";
+};
+
+&usbphy2 {
+	status = "okay";
+};
+
+&usbphy3 {
+	phy-supply = <&reg_usb3_vbus>;
+	status = "okay";
+};