[U-Boot-Users] DTB /OF_TREE Newbie and U-boot

Jerry Van Baren gerald.vanbaren at smiths-aerospace.com
Thu Jan 18 20:32:04 CET 2007

Timur Tabi wrote:
> Russell McGuire wrote:


>> 3)       Is this built into the bd_info structure?
> I'm not sure I understand.  The DTB itself is not part of U-Boot, but U-Boot can 
> parse the tree and modify it.

The dtb obsoletes the bd_info structure (but that is directly or 
indirectly the source of some of the added information that bootm puts 
into the dtb).  Instead of passing a pointer to a C struct that is 
defined both in u-boot and the kernel (which must be identical or 
literally nothing happens), the dtb is structured as a searchable 
key/value data structure that is well defined.  If the necessary 
key/value is in there, it will be found an used.  If not, that will be 
reported if possible (some errors, e.g. bad console port definitions, 
are obviously not recoverable).


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