Advantages:
- preserves existing partition layout on the sd-card.
Only the boot and rootfs partition will be overwritten.
Please note that sysupgrade will refuse to upgrade, if the existing
installation has an incompatible partition layout. Future changes
to the bootfs and/or rootfs partition size will likely cause breakage
to the sysupgrade procedure. In these cases, the ext4-sdcard.img.gz
will have to be written to the sdcard manually.
Please don't forget to backup your configuration in this case.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
This patch converts all the raspberrypi images to utilize
the common metadata-based image verification.
Note: the CM1 and CM3 currently use the same "rpi-cm"
boardname.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
The Raspberry Pi bootloader reads configuration values from config.txt
in the boot partition. This file allows to specify the amount of memory
to assign to the GPU, the license keys for hardware MPEG-2 and VC-1
decoding, Device Tree parameters and overlays, and lots of other things.
Since sysupgrade only restores the configuration after booting the newly
flashed image, these values will not be active, even if sysupgrade would
save /boot/config.txt. To solve this, add the file to the files to be
backed up, and restore it in platform_copy_config, before reboot.
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Implement a crude but functioning sysupgrade image check for the
Raspberry Pi. The code only checks if the master boot record boot
signature (0x55aa) is present in the first 512-bytes at the correct
location. This can prevent the odd bricking of a system when flashing
the wrong file.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
This way it's easier to configure device tree overlays, customize other
parameters...
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
SVN-Revision: 47126
Implement sysupgrade for Raspberry Pi, similar to the way it is done on x86:
The config files are saved in the boot partition and moved to where they are
normally expected in preinit.
Also add optional gzip compression for the SD card image, since this can save
a lot of space (76M vs 6M), also similar to x86.
Signed-off-by: Bruno Randolf <br1@einfach.org>
SVN-Revision: 46347
