Update the various references to SPL in this document. Make sure to
refer to 'phases' instead of 'stages', which is not a U-Boot term.
Fix a few U-boot typos and try to improve grammar a little while we are
here.
Signed-off-by: Simon Glass <sjg@chromium.org>
When using FIT to load firmware builds for multiple models, the FIT must
include a common binary along with a number of devicetree blobs, one for
each model. This is the same mechanism as is used for loading an OS.
However, SPL builds do not normally use the full devicetree, but instead
a cut-down version which various nodes and properties removed.
Add a new fit,fdt-phase property to allow binman to produce these
devicetree blobs.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add details regarding scheme which need to be followed in SPL and
further stages for those regions which need to be preserved across
bootstages.
Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
Reviewed-by: Simon Glass <sjg@chromium>
Add info regarding splash screen, video, bloblist and GPIO related
Kconfigs which were missing in the documentation.
Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
Reviewed-by: Simon Glass <sjg@chromium>
Add more detail to the description of U-Boot boot phases:
* describe which steps are optional
* mentions alternative boot flows
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Now that Linux has accepted these tags, move U-Boot over to use them.
Tidy up the comments and formatting, making sure that VPL is mentioned
too.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add support for VPL, a new phase of U-Boot. This runs after TPL. It is
responsible for selecting which SPL binary to run, based on a
verified-boot process.
Signed-off-by: Simon Glass <sjg@chromium.org>
