Hi Rob, On 10-02-22, 08:39, Rob Herring wrote: > On Thu, Feb 10, 2022 at 12:51 AM Vinod Koul <vkoul@xxxxxxxxxx> wrote: > > > > Duplicated unit address is okay if we have only one such node enabled. > > So, remove '-Wno-unique_unit_address' from DTC_FLAGS. > > > > This helps in reducing warnings in qcom dts from > > > > 6483 unique_unit_address > > 1108 simple_bus_reg > > 764 avoid_unnecessary_addr_size > > 712 unit_address_vs_reg > > 120 graph_child_address > > 32 unique_unit_address_if_enabled > > > > after this patch: > > 277 simple_bus_reg > > 191 avoid_unnecessary_addr_size > > 178 unit_address_vs_reg > > 32 unique_unit_address_if_enabled > > 30 graph_child_address > > I'm confused how unique_unit_address changes the count for others? It does, I reran this and comparing before and after logs and looking at the diff, few other warnings seems to disappear as well: For example these are not shown now after applying the patch and they seem legit to me arch/arm64/boot/dts/qcom/ipq6018.dtsi:181.11-764.4: Warning (unit_address_vs_reg): /soc: node has a reg or ranges property, but no unit name arch/arm64/boot/dts/qcom/ipq6018.dtsi:188.20-193.5: Warning (simple_bus_reg): /soc/qrng@e1000: simple-bus unit address format error, expected "e3000" arch/arm64/boot/dts/qcom/ipq6018.dtsi:519.9-525.5: Warning (simple_bus_reg): /soc/timer: missing or empty reg/ranges property arch/arm64/boot/dts/qcom/ipq6018.dtsi:646.22-679.5: Warning (simple_bus_reg): /soc/usb2@7000000: simple-bus unit address format error, expected "70f8800" also defined at arch/arm64/boot/dts/qcom/ipq6018-cp01-c1.dts:86.7-88.3 arch/arm64/boot/dts/qcom/ipq6018.dtsi:723.22-763.5: Warning (simple_bus_reg): /soc/usb3@8A00000: simple-bus unit address format error, expected "8af8800" arch/arm64/boot/dts/qcom/ipq6018.dtsi:300.22-313.5: Warning (unique_unit_address): /soc/spi@78b6000: duplicate unit-address (also used in node /soc/i2c@78b6000) arch/arm64/boot/dts/qcom/msm8996.dtsi:427.18-436.5: Warning (unit_address_vs_reg): /reserved-memory/rmtfs@86700000: node has a unit name, but no reg or ranges property arch/arm64/boot/dts/qcom/msm8996.dtsi:576.11-3188.4: Warning (unit_address_vs_reg): /soc: node has a reg or ranges property, but no unit name arch/arm64/boot/dts/qcom/msm8996.dtsi:1569.11-1730.5: Warning (unit_address_vs_reg): /soc/agnoc@0: node has a unit name, but no reg or ranges property arch/arm64/boot/dts/qcom/msm8996.dtsi:2994.24-2997.7: Warning (unit_address_vs_reg): /soc/slim@91c0000/ngd@1/tas-ifd: node has a reg or ranges property, but no unit name arch/arm64/boot/dts/qcom/msm8996.dtsi:3063.13-3066.8: Warning (unit_address_vs_reg): /soc/remoteproc@9300000/smd-edge/apr/q6core: node has a reg or ranges property, but no unit name arch/arm64/boot/dts/qcom/msm8996.dtsi:3068.19-3080.8: Warning (unit_address_vs_reg): /soc/remoteproc@9300000/smd-edge/apr/q6afe: node has a reg or ranges property, but no unit name arch/arm64/boot/dts/qcom/msm8996.dtsi:3082.19-3092.8: Warning (unit_address_vs_reg): /soc/remoteproc@9300000/smd-edge/apr/q6asm: node has a reg or ranges property, but no unit name arch/arm64/boot/dts/qcom/msm8996.dtsi:3094.19-3101.8: Warning (unit_address_vs_reg): /soc/remoteproc@9300000/smd-edge/apr/q6adm: node has a reg or ranges property, but no unit name arch/arm64/boot/dts/qcom/msm8996.dtsi:1569.11-1730.5: Warning (simple_bus_reg): /soc/agnoc@0: missing or empty reg/ranges property arch/arm64/boot/dts/qcom/msm8996.dtsi:1810.23-1943.5: Warning (simple_bus_reg): /soc/camss@a00000: simple-bus unit address format error, expected "a34000" arch/arm64/boot/dts/qcom/msm8996.dtsi:831.21-878.6: Warning (avoid_unnecessary_addr_size): /soc/mdss@900000/dsi@994000: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property arch/arm64/boot/dts/qcom/pm8994.dtsi:132.9-141.4: Warning (avoid_unnecessary_addr_size): /soc/spmi@400f000/pmic@1: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property arch/arm64/boot/dts/qcom/msm8996.dtsi:3046.13-3104.6: Warning (avoid_unnecessary_addr_size): /soc/remoteproc@9300000/smd-edge: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property arch/arm64/boot/dts/qcom/msm8996.dtsi:2901.27-2916.5: Warning (unique_unit_address): /soc/i2c@75ba000: duplicate unit-address (also used in node /soc/spi@75ba000) arch/arm64/boot/dts/qcom/msm8996.dtsi:927.11-937.7: Warning (graph_child_address): /soc/mdss@900000/hdmi-tx@9a0000/ports: graph node has single child node 'port@0', #address-cells/#size-cells are not necessary arch/arm64/boot/dts/qcom/ipq8074.dtsi:104.11-849.4: Warning (unit_address_vs_reg): /soc: node has a reg or ranges property, but no unit name arch/arm64/boot/dts/qcom/ipq8074.dtsi:651.9-657.5: Warning (simple_bus_reg): /soc/timer: missing or empty reg/ranges property Thanks > > > > > which would help people focus on the actual warnings and fix them. > > Hopefully you do a 'sort -u' on the warnings to dedup them... > > > > > Suggested-by: Rob Herring <robh@xxxxxxxxxx> > > Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> > > --- > > scripts/Makefile.lib | 8 +++++--- > > 1 file changed, 5 insertions(+), 3 deletions(-) > > > > diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib > > index 79be57fdd32a..7e4f6671d950 100644 > > --- a/scripts/Makefile.lib > > +++ b/scripts/Makefile.lib > > @@ -299,7 +299,8 @@ quiet_cmd_gzip = GZIP $@ > > # DTC > > # --------------------------------------------------------------------------- > > DTC ?= $(objtree)/scripts/dtc/dtc > > -DTC_FLAGS += -Wno-interrupt_provider > > +DTC_FLAGS += -Wno-interrupt_provider \ > > + -Wno-unique_unit_address > > > > # Disable noisy checks by default > > ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),) > > @@ -307,8 +308,9 @@ DTC_FLAGS += -Wno-unit_address_vs_reg \ > > -Wno-avoid_unnecessary_addr_size \ > > -Wno-alias_paths \ > > -Wno-graph_child_address \ > > - -Wno-simple_bus_reg \ > > - -Wno-unique_unit_address > > + -Wno-simple_bus_reg > > +else > > +DTC_FLAGS += -Wunique_unit_address_if_enabled > > endif > > > > ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),) > > -- > > 2.31.1 > > -- ~Vinod
