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/drivers/clk/exynos/clk-pll.c

@@ -0,0 +1,33 @@
+/*
+ * Exynos PLL helper functions for clock drivers.
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <div64.h>
+
+#define PLL145X_MDIV_SHIFT	16
+#define PLL145X_MDIV_MASK	0x3ff
+#define PLL145X_PDIV_SHIFT	8
+#define PLL145X_PDIV_MASK	0x3f
+#define PLL145X_SDIV_SHIFT	0
+#define PLL145X_SDIV_MASK	0x7
+
+unsigned long pll145x_get_rate(unsigned int *con1, unsigned long fin_freq)
+{
+	unsigned long pll_con1 = readl(con1);
+	unsigned long mdiv, sdiv, pdiv;
+	uint64_t fvco = fin_freq;
+
+	mdiv = (pll_con1 >> PLL145X_MDIV_SHIFT) & PLL145X_MDIV_MASK;
+	pdiv = (pll_con1 >> PLL145X_PDIV_SHIFT) & PLL145X_PDIV_MASK;
+	sdiv = (pll_con1 >> PLL145X_SDIV_SHIFT) & PLL145X_SDIV_MASK;
+
+	fvco *= mdiv;
+	do_div(fvco, (pdiv << sdiv));
+	return (unsigned long)fvco;
+}