The "simple" SPL_LOAD_FIT path is the most compliant with the format documented in doc/uImage.FIT/source_file_format.txt. The other two paths to load a FIT are SPL_LOAD_FIT_FULL and the "bootm" command.
Since the Kconfig menu is the most likely place for a new user to see these options, it seems like the most logical candidate to document the limitations. This documents the _know_ issues, and is not intended to be a complete list of all follies.
Signed-off-by: Alexandru Gagniuc mr.nuke.me@gmail.com --- common/Kconfig.boot | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/common/Kconfig.boot b/common/Kconfig.boot index 9c335f4f8c..f77e59a22a 100644 --- a/common/Kconfig.boot +++ b/common/Kconfig.boot @@ -202,6 +202,16 @@ config SPL_LOAD_FIT particular it can handle selecting from multiple device tree and passing the correct one to U-Boot.
+ This path has the following limitations: + + 1. "loadables" images, other than FTDs, which do not have a "load" + will not be loaded. This limitation also applies to FPGA images + with the correct "compatible" string. + 2. For FPGA images, only the "compatible" = "u-boot,fpga-legacy" + loading method is supported. + 3. FDTs are only loaded for images with an "os" property of "u-boot". + "linux" images are also supported with Falcon boot mode. + config SPL_LOAD_FIT_ADDRESS hex "load address of fit image" depends on SPL_LOAD_FIT