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/exynos4210-pinctrl-uboot.dtsi

@@ -0,0 +1,29 @@
+/*
+ * U-Boot additions to enable a generic Exynos GPIO driver
+ *
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/{
+	pinctrl_0: pinctrl@11400000 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "samsung,exynos4210-pinctrl";
+	};
+
+	pinctrl_1: pinctrl@11000000 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		gpx0: gpx0 {
+			reg = <0xc00 0x20>;
+		};
+	};
+
+	pinctrl_2: pinctrl@03860000 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+	};
+
+};