[PATCH 2/4] build: Respect CONFIG_SPL_BUILD in DT sources

[Simon Glass]

Hi Marek,

On Thu, 21 Nov 2024 at 18:59, Marek Vasut <marex at denx.de> wrote:
>
> Currently the U-Boot SPL build uses the same DTBs that were generated
> during U-Boot proper build, and calls 'fdtgrep' on those DTBs to filter
> out uninteresting nodes and properties. Those U-Boot proper DTBs are
> built from DTS which are first preprocessed by CPP, but that CPP is
> invoked in U-Boot proper build context and effectively ignores the
> CONFIG_SPL_BUILD macro. In case the CONFIG_SPL_BUILD macro is used
> in any .dts file, the content of the macro is removed by CPP.
>
> Fix this by building a separate set of DTBs for the SPL, which are
> preprocessed by CPP with -DCONFIG_SPL_BUILD set. Use the same way
> for the other PLs.
>
> Signed-off-by: Marek Vasut <marex at denx.de>
> ---
> Cc: "NXP i.MX U-Boot Team" <uboot-imx at nxp.com>
> Cc: Bryan Brattlof <bb at ti.com>
> Cc: Fabio Estevam <festevam at gmail.com>
> Cc: Greg Malysa <greg.malysa at timesys.com>
> Cc: Ian Roberts <ian.roberts at timesys.com>
> Cc: Ilias Apalodimas <ilias.apalodimas at linaro.org>
> Cc: Jonathan Humphreys <j-humphreys at ti.com>
> Cc: Masahisa Kojima <kojima.masahisa at socionext.com>
> Cc: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
> Cc: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Stefano Babic <sbabic at denx.de>
> Cc: Sumit Garg <sumit.garg at linaro.org>
> Cc: Tim Harvey <tharvey at gateworks.com>
> Cc: Tom Rini <trini at konsulko.com>
> Cc: u-boot at lists.denx.de
> ---
> NOTE: For v2025.04
> ---
>  dts/Makefile         |  5 ++++-
>  scripts/Makefile.lib | 11 +++++++++++
>  scripts/Makefile.xpl |  7 ++++++-
>  3 files changed, 21 insertions(+), 2 deletions(-)

As mentioned on the other patch, this should be handled in fdtgrep

Regards,
Simon