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/tegra20-whistler.dts

@@ -0,0 +1,76 @@
+/dts-v1/;
+
+#include "tegra20.dtsi"
+
+/ {
+	model = "NVIDIA Tegra20 Whistler evaluation board";
+	compatible = "nvidia,whistler", "nvidia,tegra20";
+
+	chosen {
+		stdout-path = &uarta;
+	};
+
+	aliases {
+		i2c0 = "/i2c@7000d000";
+		usb0 = "/usb@c5008000";
+		sdhci0 = "/sdhci@c8000600";
+		sdhci1 = "/sdhci@c8000400";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = < 0x00000000 0x20000000 >;
+	};
+
+	serial@70006000 {
+		clock-frequency = < 216000000 >;
+	};
+
+	i2c@7000d000 {
+		status = "okay";
+		clock-frequency = <100000>;
+
+		pmic@3c {
+			compatible = "maxim,max8907b";
+			reg = <0x3c>;
+
+			clk_32k: clock {
+				compatible = "fixed-clock";
+				/*
+				 * leave out for now due to CPP:
+				 * #clock-cells = <0>;
+				 */
+				clock-frequency = <32768>;
+			};
+		};
+	};
+
+	usb@c5008000 {
+		status = "okay";
+	};
+
+	sdhci@c8000400 {
+		status = "okay";
+		wp-gpios = <&gpio TEGRA_GPIO(V, 5) GPIO_ACTIVE_HIGH>;
+		bus-width = <8>;
+	};
+
+	sdhci@c8000600 {
+		status = "okay";
+		bus-width = <8>;
+	};
+
+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock@0 {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
+};