tree 0d576cb7e987e4eef936880ebc2785ffa7d2efb9
parent 2855a0c14dc1e390a13fbaecf14e888d1339a0b9
author Julius Werner <jwerner@chromium.org> 1558047859 -0700
committer Patrick Georgi <pgeorgi@google.com> 1561108927 +0000

fit: Add device tree compression

This patch adds support for compressing individual device trees in the
FIT image. In order to make this efficient, we'll have to pull the
compatible property out of the FDT and store it directly in the config
node of the FIT image, so that we don't have to scan (and therefore
decompress) every single FDT on boot. Device tree compression is only
supported for FIT images that have this external compatible property.
For older images with no compression, we still support fallback to
scanning the FDT for the property.

This patch was adapted from depthcharge's http://crosreview.com/1553458

Change-Id: Ifcb6997782c480c8ef6692df17b66ad96264e623
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32872
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>