[U-Boot] [PATCH] dts: re-write dts/Makefile more simply with Kbuild

[Masahiro Yamada]

Hello Simon,


> 
> >   - dts/dt.dtb
> 
> This is a temporary file, probably deleted during the build. 

No.
It is a temporary file, but it must not be deleted during the build.
Otherwise, dts/dt.dtb will be re-generated at every build
even when it shouldn't.

> I'm not
> even sure if it is created when you are building multiple files.
> Perhaps it use just used for CONFIG_OF_EMBED?

My patch is using dts/dt.dtb for both CONFIG_OF_EMBED and
CONFIG_OF_SEPARTE.

If you don't want to generate dts/dt.dtb at all,
most of  lines in dts/Makefile must be moved to the top Makefile,
which leads we get the top Makefile fatter and dirtier.


> >   - ./u-boot.dtb
> >
> > But, if you really need a DTB at the top directory,
> > I can revive u-boot.dtb at version 3.
> 
> For now I think there is a 'default' .dtb for each board config. After
> all U-Boot does not have a way to select between several of them at
> runtime. So it makes sense for this one to be made available as it
> currently is I think. Perhaps it could be a symlink to the real one?

Creating a symbolic link during the build is generally
troublesome and a bad idea, I think.


Best Regards
Masahiro Yamada