[PATCH 2/2] kbuild: Build DT binding examples with dtc warnings enabled

[Rob Herring]

Now that we have a separate rule for DT binding examples, we can customize
the dtc options. Let's adjust the dtc warnings to me more strict by
default so the examples get cleaned up as they get converted to schema.

Leaving 'avoid_unnecessary_addr_size' and 'graph_child_address' warnings
disabled as examples tend to be incomplete and they generates a lot of
warnings.

Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Michal Marek <michal.lkml@xxxxxxxxxxx>
Cc: linux-kbuild@xxxxxxxxxxxxxxx
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
---
 scripts/Makefile.lib | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 78fa1a3d983a..1a149e680308 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -308,6 +308,10 @@ define rule_dtc_dt_yaml
 	$(call cmd,dtb_check,$(word 2, $(real-prereqs)))
 endef
 
+$(obj)/%.example.dt.yaml: DTC_FLAGS = \
+	-Wno-avoid_unnecessary_addr_size \
+	-Wno-graph_child_address
+
 $(obj)/%.example.dt.yaml: $(src)/%.example.dts $(DT_EXAMPLES_SCHEMA) $(DTC) FORCE
 	$(call if_changed_rule,dtc_dt_yaml)
 
-- 
2.20.1