Hi Michal, On Fri, 11 Jun 2021 at 07:56, Michal Simek <[email protected]> wrote: > > Hi, > > I am just trying to wrap my head around DTB_RESELECT feature.
Did you intend to cc the author of that? Does doc/README.multi-dtb-fit help? > ZynqMP is using u-boot.itb which is u-boot/atf + a lot of DT files. > As of now SPL should pick the right one load it predefined location > which U-Boot proper pickup. > Others DTBs are not loaded at all. > This is working fine and I expect it should work like this even with > DTB_RESELECT enabled because you need to have base DTB for being able to > do platform detection. > I have hookup platform detection in embedded_dtb_select and I know which > board revision I am running at and struggling how to tell u-boot what to do. > > What should be the right flow for changing DTB at run time? > Where they should be stored? I would expect that I need to have FIT > image in memory for all board revisions and u-boot should be calling > board_fit_config_name_match() which will decide which DT is correct > based on board detection done in embedded_dtb_select(). Yes you can use a FIT to hold the DTs. You can also use binman I suppose (the 'files' entry type perhaps). Regards, Simon
