kbuild: disable new dtc graph and unit-address warnings

dtc gained some new warnings for OF graphs and unique unit addresses,
but they are currently much too noisy. So turn off
'graph_child_address', 'graph_port', and 'unique_unit_address' warnings
by default. They can be enabled by building dtbs with W=1.

Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: linux-kbuild@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 07d07409f16f..26fa6d3845b9 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -251,6 +251,9 @@ DTC_FLAGS += -Wno-unit_address_vs_reg \
         -Wno-unit_address_format \
         -Wno-avoid_unnecessary_addr_size \
         -Wno-alias_paths \
+        -Wno-graph_child_address \
+        -Wno-graph_port \
+        -Wno-unique_unit_address \
         -Wno-pci_device_reg
 endif