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/board/Marvell/db-88f6720/MAINTAINERS

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+DB_88F6720 BOARD
+M:	Stefan Roese <sr@denx.de>
+S:	Maintained
+F:	board/Marvell/db-88f6720/
+F:	include/configs/db-88f6720.h
+F:	configs/db-88f6720_defconfig

u-boot/board/Marvell/db-88f6720/Makefile

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+#
+# Copyright (C) 2016 Stefan Roese <sr@denx.de>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= db-88f6720.o

u-boot/board/Marvell/db-88f6720/db-88f6720.c

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+/*
+ * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <miiphy.h>
+#include <netdev.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/soc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Those values and defines are taken from the Marvell U-Boot version
+ * "u-boot-2013.01-2014_T2.0" for the board Armada 375 DB-88F6720
+ */
+#define DB_88F6720_MPP0_7		0x00020020 /* SPI */
+#define DB_88F6720_MPP8_15		0x22000022 /* SPI , I2C */
+#define DB_88F6720_MPP16_23		0x22222222 /* UART, TDM*/
+#define DB_88F6720_MPP24_31		0x33333333 /* SDIO, SPI1*/
+#define DB_88F6720_MPP32_39		0x04403330 /* SPI1, External SMI */
+#define DB_88F6720_MPP40_47		0x22002044 /* UART1, GE0, SATA0 LED */
+#define DB_88F6720_MPP48_55		0x22222222 /* GE0 */
+#define DB_88F6720_MPP56_63		0x04444422 /* GE0 , LED_MATRIX, GPIO */
+#define DB_88F6720_MPP64_67		0x014	/* LED_MATRIX, SATA1 LED*/
+
+#define DB_88F6720_GPP_OUT_ENA_LOW	0xFFFFFFFF
+#define DB_88F6720_GPP_OUT_ENA_MID	0x7FFFFFFF
+#define DB_88F6720_GPP_OUT_ENA_HIGH	0xFFFFFFFF
+#define DB_88F6720_GPP_OUT_VAL_LOW	0x0
+#define DB_88F6720_GPP_OUT_VAL_MID	BIT(31)	/* SATA Power output enable */
+#define DB_88F6720_GPP_OUT_VAL_HIGH	0x0
+#define DB_88F6720_GPP_POL_LOW		0x0
+#define DB_88F6720_GPP_POL_MID		0x0
+#define DB_88F6720_GPP_POL_HIGH		0x0
+
+int board_early_init_f(void)
+{
+	/* Configure MPP */
+	writel(DB_88F6720_MPP0_7, MVEBU_MPP_BASE + 0x00);
+	writel(DB_88F6720_MPP8_15, MVEBU_MPP_BASE + 0x04);
+	writel(DB_88F6720_MPP16_23, MVEBU_MPP_BASE + 0x08);
+	writel(DB_88F6720_MPP24_31, MVEBU_MPP_BASE + 0x0c);
+	writel(DB_88F6720_MPP32_39, MVEBU_MPP_BASE + 0x10);
+	writel(DB_88F6720_MPP40_47, MVEBU_MPP_BASE + 0x14);
+	writel(DB_88F6720_MPP48_55, MVEBU_MPP_BASE + 0x18);
+	writel(DB_88F6720_MPP56_63, MVEBU_MPP_BASE + 0x1c);
+	writel(DB_88F6720_MPP64_67, MVEBU_MPP_BASE + 0x20);
+
+	/* Configure GPIO */
+	/* Set GPP Out value */
+	writel(DB_88F6720_GPP_OUT_VAL_LOW, MVEBU_GPIO0_BASE + 0x00);
+	writel(DB_88F6720_GPP_OUT_VAL_MID, MVEBU_GPIO1_BASE + 0x00);
+	writel(DB_88F6720_GPP_OUT_VAL_HIGH, MVEBU_GPIO2_BASE + 0x00);
+
+	/* Set GPP Polarity */
+	writel(DB_88F6720_GPP_POL_LOW, MVEBU_GPIO0_BASE + 0x0c);
+	writel(DB_88F6720_GPP_POL_MID, MVEBU_GPIO1_BASE + 0x0c);
+	writel(DB_88F6720_GPP_POL_HIGH, MVEBU_GPIO2_BASE + 0x0c);
+
+	/* Set GPP Out Enable */
+	writel(DB_88F6720_GPP_OUT_ENA_LOW, MVEBU_GPIO0_BASE + 0x04);
+	writel(DB_88F6720_GPP_OUT_ENA_MID, MVEBU_GPIO1_BASE + 0x04);
+	writel(DB_88F6720_GPP_OUT_ENA_HIGH, MVEBU_GPIO2_BASE + 0x04);
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
+
+	return 0;
+}
+
+int checkboard(void)
+{
+	puts("Board: Marvell DB-88F6720\n");
+
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	cpu_eth_init(bis); /* Built in controller(s) come first */
+	return pci_eth_init(bis);
+}

u-boot/board/Marvell/db-88f6720/kwbimage.cfg

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+#
+# Copyright (C) 2014 Stefan Roese <sr@denx.de>
+#
+
+# Armada XP uses version 1 image format
+VERSION		1
+
+# Boot Media configurations
+BOOT_FROM	spi
+
+# Binary Header (bin_hdr) with DDR3 training code
+BINARY spl/u-boot-spl-dtb.bin 0000005b 00000068