tree e191b980a72a1912e399d96c16f8e9133b31bc5e
parent 472a8f50138ac64efb1c7b8352f8d7d846fcb533
author Daniel Kurtz <djkurtz@chromium.org> 1318603473 +0800
committer Daniel Kurtz <djkurtz@chromium.org> 1318919876 +0800

Allow reading a backup without doing an update

If no firmware image is provided, but --backup is requested, still read
the current image and save it to disk.

BUG=chromium-os:21568
TEST=cyapa_fw_update -f -b -o /tmp/backup.bin
  => Should backup current firmware to /tmp/backup.bin

Change-Id: I10c79a2ead42038583a627024aca39a68731892b