scripts/Makefile.lib: change spelling of $(srctree)/arch/$(ARCH)/dts in dtc_cpp_flags

Currently, all in-tree .dts files (apart from some under test/ and
tools/), reside in arch/$ARCH/dts. However, in the linux kernel tree,
dts files for arm64 boards, and probably in the not too distant
future [1], arm boards as well, live in subdirectories of that.

For private forks, using a vendor or project subdirectory is also more
convenient to clearly separate private code from upstream - in the
same way that code under board/ is also split and easy to maintain.

In order to prepare for us to follow suit and do the splitting of the
in-tree .dts files, and to make life a little easier for private forks
that already place dts files not directly in arch/$ARCH/dts, change
the $(srctree)/arch/$(ARCH)/dts path to instead refer to the directory of
the .dts file being compiled. This should be a no-op for all existing
cases.

[1] https://lore.kernel.org/lkml/20220328000915.15041-1-ansuelsmth@gmail.com/

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 7362a392ada5f83f3fd8b44fb35851a50a11f870..f5ab7af0f45dd6b55a5e9b4e376e557674ba6c57 100644 (file)
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -186,7 +186,7 @@ u_boot_dtsi = $(strip $(u_boot_dtsi_options_debug) \
 # Modified for U-Boot
 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
                 $(UBOOTINCLUDE)                                         \
-                -I$(srctree)/arch/$(ARCH)/dts                           \
+                -I$(dir $<)                                             \
                 -I$(srctree)/arch/$(ARCH)/dts/include                   \
                 -I$(srctree)/include                                    \
                 -D__ASSEMBLY__                                          \