On Wed, Mar 30, 2022 at 10:33:06AM +0800, Jiaxin Yu wrote:

> "(Although I think this would technicallybreak the ABI?)"
> ==> I can't understand this question, could you help explain it in more
> detail.

Making a previously optional property required means that systems that
previously worked may stop working unless they update their DT, DTs may
be distributed separately to the kernel and perhaps even baked into
firmware or similar.