[PATCH v4 19/21] drivers/of: Support adding sub-tree

[Pantelis Antoniou]

Hi Ben,

> On May 14, 2015, at 10:47 , Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote:
> 

[snip]

So I spend some time thinking about your use case and I think it boils down
to this:

I have a live tree in the firmware, I have made changes and I need to reflect
those changes to the live tree in the kernel.

Sounds like ‘how do I generate a patch for getting those two in sync'. No?

I can see where this might be useful for others as all.

I think we really need to create a liblivedt like we have libfdt since
we have a number of projects going about using/manipulating DT at runtime.

1. The linux kernel, with it’s own live tree implementation.
2. The device tree compiler (it has a live tree) custom implemented.
3. Your weird and wonderful (or wacky) firmware.
4. u-boot does use DT now, but it does with libfdt. I believe this is suboptimal.
5. barebox does DT as well.

Most of what we want to do with DT can be abstracted in a library I think that
all of those projects can use.

What are your thoughts?

Regards

— Pantelis