For boards that need U-Boot-specific additions to the device tree, it is
a minor annoyance to have to add these each time the tree is synced with
upstream.
Add a means to include a file (e.g. u-boot.dtsi) automatically into the .dts
file before it is compiled.
The file uses is the first one that exists in this list:
arch/<arch>/dts/<board.dts>-u-boot.dtsi
arch/<arch>/dts/<cpu>-u-boot.dtsi
arch/<arch>/dts/<vendor>-u-boot.dtsi
arch/<arch>/dts/u-boot.dtsi
Signed-off-by: Simon Glass <s...@chromium.org>
Suggested-by: Tom Rini <tr...@konsulko.com>
---
Changes in v3:
- Add a new patch to automatically include a U-Boot .dtsi file
Changes in v2: None
scripts/Makefile.lib | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 2539ba5..b414a0c 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -164,6 +164,17 @@ cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS)
$(UBOOTINCLUDE) \
ld_flags = $(LDFLAGS) $(ldflags-y)
+dts_dir = $(srctree)/arch/$(ARCH)/dts
+
+# Try these files in order to find the U-Boot-specific .dtsi include file
+binman_dtsi_options = $(wildcard $(dts_dir)/$(basename $(notdir
$<))-u-boot.dtsi) \
+ $(wildcard $(dts_dir)/$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \
+ $(wildcard $(dts_dir)/$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \
+ $(wildcard $(dts_dir)/u-boot.dtsi)
+
+# We use the first match
+binman_dtsi = $(firstword $(binman_dtsi_options))
+
# Modified for U-Boot
dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
-I$(srctree)/arch/$(ARCH)/dts \
@@ -293,8 +304,10 @@ $(obj)/%.dtb.S: $(obj)/%.dtb
quiet_cmd_dtc = DTC $@
# Modified for U-Boot
+# Bring in any U-Boot-specific include after the '/dts-v1/;' header
cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
- $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
+ cat $< $(if $(binman_dtsi),| sed '/dts-v1/a\#include
\"$(binman_dtsi)\"') | \
+ $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) - ;
\
$(DTC) -O dtb -o $@ -b 0 \
-i $(dir $<) $(DTC_FLAGS) \
-d $(depfile).dtc.tmp $(dtc-tmp) ; \
--
2.8.0.rc3.226.g39d4020
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