On Thu, Feb 23, 2023 at 3:34 PM Frank Rowand <frowand.list@xxxxxxxxx> wrote: > > When enabling CONFIG_OF on a platform where of_root is not populated by > firmware, we end up without a root node. In order to apply overlays and > create subnodes of the root node, we need one. Create this root node > by unflattening an empty builtin dtb. > > If firmware provides a flattened device tree (FDT) then the FDT is > unflattened via setup_arch(). Otherwise, setup_of() which is called > immediately after setup_arch(), and will create the default root node > if it does not exist. Why do we need a hook after setup_arch() rather than an initcall? Rob
