Hi Simon,
On 6/26/21 8:30 PM, Simon Glass wrote: > 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). I got it working. Also found one alignment issue which needs to be fixed. And also DT overlays are not supported now. Thanks, Michal
