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/common/spl/spl_sata.c

@@ -0,0 +1,55 @@
+/*
+ * (C) Copyright 2013
+ * Texas Instruments, <www.ti.com>
+ *
+ * Dan Murphy <dmurphy@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * Derived work from spl_usb.c
+ */
+
+#include <common.h>
+#include <spl.h>
+#include <asm/u-boot.h>
+#include <sata.h>
+#include <scsi.h>
+#include <errno.h>
+#include <fat.h>
+#include <image.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int spl_sata_load_image(void)
+{
+	int err;
+	struct blk_desc *stor_dev;
+
+	err = init_sata(CONFIG_SPL_SATA_BOOT_DEVICE);
+	if (err) {
+#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
+		printf("spl: sata init failed: err - %d\n", err);
+#endif
+		return err;
+	} else {
+		/* try to recognize storage devices immediately */
+		scsi_scan(0);
+		stor_dev = blk_get_devnum_by_type(IF_TYPE_SCSI, 0);
+		if (!stor_dev)
+			return -ENODEV;
+	}
+
+#ifdef CONFIG_SPL_OS_BOOT
+	if (spl_start_uboot() || spl_load_image_fat_os(stor_dev,
+									CONFIG_SYS_SATA_FAT_BOOT_PARTITION))
+#endif
+	err = spl_load_image_fat(stor_dev,
+				CONFIG_SYS_SATA_FAT_BOOT_PARTITION,
+				CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
+	if (err) {
+		puts("Error loading sata device\n");
+		return err;
+	}
+
+	return 0;
+}