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/mtd/mtd_uboot.c

@@ -0,0 +1,100 @@
+/*
+ * (C) Copyright 2014
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <linux/mtd/mtd.h>
+#include <jffs2/jffs2.h>
+
+static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size,
+		loff_t *maxsize, int devtype)
+{
+#ifdef CONFIG_CMD_MTDPARTS
+	struct mtd_device *dev;
+	struct part_info *part;
+	u8 pnum;
+	int ret;
+
+	ret = mtdparts_init();
+	if (ret)
+		return ret;
+
+	ret = find_dev_and_part(partname, &dev, &pnum, &part);
+	if (ret)
+		return ret;
+
+	if (dev->id->type != devtype) {
+		printf("not same typ %d != %d\n", dev->id->type, devtype);
+		return -1;
+	}
+
+	*off = part->offset;
+	*size = part->size;
+	*maxsize = part->size;
+	*idx = dev->id->num;
+
+	return 0;
+#else
+	puts("mtdparts support missing.\n");
+	return -1;
+#endif
+}
+
+int mtd_arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
+		loff_t *maxsize, int devtype, uint64_t chipsize)
+{
+	if (!str2off(arg, off))
+		return get_part(arg, idx, off, size, maxsize, devtype);
+
+	if (*off >= chipsize) {
+		puts("Offset exceeds device limit\n");
+		return -1;
+	}
+
+	*maxsize = chipsize - *off;
+	*size = *maxsize;
+	return 0;
+}
+
+int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
+		     loff_t *size, loff_t *maxsize, int devtype,
+		     uint64_t chipsize)
+{
+	int ret;
+
+	if (argc == 0) {
+		*off = 0;
+		*size = chipsize;
+		*maxsize = *size;
+		goto print;
+	}
+
+	ret = mtd_arg_off(argv[0], idx, off, size, maxsize, devtype,
+			  chipsize);
+	if (ret)
+		return ret;
+
+	if (argc == 1)
+		goto print;
+
+	if (!str2off(argv[1], size)) {
+		printf("'%s' is not a number\n", argv[1]);
+		return -1;
+	}
+
+	if (*size > *maxsize) {
+		puts("Size exceeds partition or device limit\n");
+		return -1;
+	}
+
+print:
+	printf("device %d ", *idx);
+	if (*size == chipsize)
+		puts("whole chip\n");
+	else
+		printf("offset 0x%llx, size 0x%llx\n",
+		       (unsigned long long)*off, (unsigned long long)*size);
+	return 0;
+}