Re: [PATCH] devicetree: Enable generation of __symbols__ in all dtb files

Frank Rowand
2017-08-16T00:14:53Z

On 08/15/17 15:36, Rob Herring wrote:
> On Tue, Aug 15, 2017 at 4:15 PM, Tom Rini <trini@konsulko.com> wrote:
>> With support for stacked overlays being part of libfdt it is now

< snip >

>> My proposal is that we do not want __symbols__ existence to be dependent
>> on some part of the kernel configuration for a number of reasons.
>> First, this is out of step with the rest of how dtbs are created today
>> and more importantly, thought about. Today, all dtb content is
>> independent of CONFIG options. If you build a dtb from a given kernel
>> tree, everyone will agree on the result. This is part of the "contract"
>> on passing old kernels and new dtb files even.
>
> Agree completely. I don't even like that building dtbs depends on the ARCH.

< snip >

I also agree that use of CONFIG options is a solution that I do not like.
It has always seemed that there is a bit of an impedence mismatch in that
we build a dtb in an environment that is configured for a specific board
and architecture.

Does anyone have any thoughts on another way to control whether or not a
given dtb or a given build of a dtb would contain the symbols needed for
overlays or not include the symbols?

-Frank