Current update_tftp() flow:
1.) fetch "updatefile" from defined TFTP server
2.) check if FIT format
3.) flash contained images
Add an address parameter to update_tftp(). If this address is non-zero,
skip the TFTP transfer and use the image at this address.
Also extend update_tftp() to return success/fail.
Signed-off-by: Andreas Pretzsch <apr@cn-eng.de>
The auto-update feature allows to automatically download software updates
from a TFTP server and store them in Flash memory during boot. Updates are
contained in a FIT file and protected with SHA-1 checksum.
More detailed description can be found in doc/README.update.
Signed-off-by: Rafal Czubak <rcz@semihalf.com>
Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>
