[PATCH 2/3] dts: Add ability to build DTOs only from arch/$(ARCH)/dts

[Marek Vasut]

On 10/3/24 9:58 AM, Sumit Garg wrote:

[...]

>>> IMHO, the OF_UPSTREAM migration can wait until all the required DT
>>> sources (.dts and .dtso) are present upstream. If we start to mix and
>>> match DT sources then it is going to turn into maintainers' hardship
>>> again. However, I am still open to further convincing arguments for
>>> this.
>> With some Linux kernel architectures, it takes months to get a singular
>> patch review out of the maintainers.
> 
> Okay I see the pain but we already have that rule for .dts files for
> OF_UPSTREAM switch but having a different rule for .dtso files is
> going to make maintainability complex.

What kind of rule is that ?

If the rule for .dts files is either dts/upstream or arch/*/dts, then 
the rule for .dtso is either dts/upstream+fallback to arch/*/dts or only 
arch/*/dts .

> The Linux kernel
> sub-architecture maintainers remain the same for both .dts and .dtso
> files.

Well, yes.

>> For systems which already have DTs
>> upstream and only have DTOs left, the OF_UPSTREAM conversion and DTO
>> upstreaming can be done in parallel, hence expedite the process.
> 
> Fair enough, let's try to find a middle ground to gate the local DTOs
> behind a config to make the use of local DTOs explicit. How about
> CONFIG_OF_UPSTREAM_LOCAL_DTOS?
Do you think another Kconfig option is really necessary ? I don't mind 
adding one if you think that would make a difference, but I don't see it 
as strictly necessary.