On Sun, Jan 29, 2023 at 06:30:22PM +0200, Laurent Pinchart wrote: > FIT image support is commonly used to bundle a kernel image, a device > tree, and device tree overlays. Applying overlays requires the > OF_LIBFDT_OVERLAY config option to be set, which lots of boards fail to > select, most likely because developers never noticed. This leads to an > error when trying to apply overlays: > > "config with overlays but CONFIG_OF_LIBFDT_OVERLAY not set" > > TI ARM boards select the option by default. Extend this to all systems > that select the FIT option. This only affects the default, overlay > support can still be disabled manually in the configuration. > > Signed-off-by: Laurent Pinchart <[email protected]> > Reviewed-by: Marek Vasut <[email protected]> > Reviewed-by: Simon Glass <[email protected]> > --- > I'm posting this as an RFC to get feedback. If the idea is generally > appreciated, I'll update the defconfig files accordingly.
Alright, so, I put this through a world build, and most platforms grow by 4-5kB. I think that means what I'd really like to see as a starting point is more SoCs doing an "imply OF_LIBFDT_OVERLAY if OF_LIBFDT && FIT" or adding to the default y list below, or similar. If that brings us to the point where a good number of ARM boards with FIT are enabling it, we can default y if ARM, for example. But right now it's more like several hundred boards growing in size, which is uncomfortable, given the size it's growing by. -- Tom
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