[PATCH v3 6/9] kbuild: consolidate Devicetree dtb build rules

[Andreas Färber]

Hi Geert,

Am 13.09.18 um 17:51 schrieb Geert Uytterhoeven:
> On Wed, Sep 12, 2018 at 3:02 AM Masahiro Yamada
> <yamada.masahiro at socionext.com> wrote:
>> Even x86 can enable OF and OF_UNITTEST.
>>
>> Another solution might be,
>> guard it by 'depends on ARCH_SUPPORTS_OF'.
>>
>> This is actually what ACPI does.
>>
>> menuconfig ACPI
>>         bool "ACPI (Advanced Configuration and Power Interface) Support"
>>         depends on ARCH_SUPPORTS_ACPI
>>          ...
> 
> ACPI is a real platform feature, as it depends on firmware.
> 
> CONFIG_OF can be enabled, and DT overlays can be loaded, on any platform,
> even if it has ACPI ;-)

How would loading a DT overlay work on an ACPI platform? I.e., what
would it overlay against and how to practically load such a file?

I wonder whether that could be helpful for USB devices and serdev...

Cheers,
Andreas

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