Commit 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks
properties to enable QoS on sa8775p") claims that all interconnects have
clocks and MMIO address space, but that is just not true.  Only few
have.  Bindings should restrict properties and should not allow
specifying non-existing hardware description, so fix missing constraints
for 'reg' and 'clocks'.

Fixes: 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks properties to enable QoS on sa8775p")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
---
 .../interconnect/qcom,sa8775p-rpmh.yaml       | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/Documentation/devicetree/bindings/interconnect/qcom,sa8775p-rpmh.yaml b/Documentation/devicetree/bindings/interconnect/qcom,sa8775p-rpmh.yaml
index 71428d2cce18..3dbe83e2de3d 100644
--- a/Documentation/devicetree/bindings/interconnect/qcom,sa8775p-rpmh.yaml
+++ b/Documentation/devicetree/bindings/interconnect/qcom,sa8775p-rpmh.yaml
@@ -74,6 +74,37 @@ allOf:
             - description: aggre UFS CARD AXI clock
             - description: RPMH CC IPA clock
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sa8775p-config-noc
+              - qcom,sa8775p-dc-noc
+              - qcom,sa8775p-gem-noc
+              - qcom,sa8775p-gpdsp-anoc
+              - qcom,sa8775p-lpass-ag-noc
+              - qcom,sa8775p-mmss-noc
+              - qcom,sa8775p-nspa-noc
+              - qcom,sa8775p-nspb-noc
+              - qcom,sa8775p-pcie-anoc
+              - qcom,sa8775p-system-noc
+    then:
+      properties:
+        clocks: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sa8775p-clk-virt
+              - qcom,sa8775p-mc-virt
+    then:
+      properties:
+        reg: false
+        clocks: false
+
 unevaluatedProperties: false
 
 examples:
-- 
2.48.1

On 11/29/2025 3:16 PM, Krzysztof Kozlowski wrote:
> Commit 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks
> properties to enable QoS on sa8775p") claims that all interconnects have
> clocks and MMIO address space, but that is just not true.  Only few
> have.  Bindings should restrict properties and should not allow
> specifying non-existing hardware description, so fix missing constraints
> for 'reg' and 'clocks'.
> 
> Fixes: 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks properties to enable QoS on sa8775p")
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> ---
>  .../interconnect/qcom,sa8775p-rpmh.yaml       | 31 +++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/interconnect/qcom,sa8775p-rpmh.yaml b/Documentation/devicetree/bindings/interconnect/qcom,sa8775p-rpmh.yaml
> index 71428d2cce18..3dbe83e2de3d 100644
> --- a/Documentation/devicetree/bindings/interconnect/qcom,sa8775p-rpmh.yaml
> +++ b/Documentation/devicetree/bindings/interconnect/qcom,sa8775p-rpmh.yaml
> @@ -74,6 +74,37 @@ allOf:
>              - description: aggre UFS CARD AXI clock
>              - description: RPMH CC IPA clock
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,sa8775p-config-noc
> +              - qcom,sa8775p-dc-noc
> +              - qcom,sa8775p-gem-noc
> +              - qcom,sa8775p-gpdsp-anoc
> +              - qcom,sa8775p-lpass-ag-noc
> +              - qcom,sa8775p-mmss-noc
> +              - qcom,sa8775p-nspa-noc
> +              - qcom,sa8775p-nspb-noc
> +              - qcom,sa8775p-pcie-anoc
> +              - qcom,sa8775p-system-noc
> +    then:
> +      properties:
> +        clocks: false
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,sa8775p-clk-virt
> +              - qcom,sa8775p-mc-virt
> +    then:
> +      properties:
> +        reg: false
> +        clocks: false
> +
>  unevaluatedProperties: false
>  
>  examples:

Hi Krzysztof,
Thanks for fixing this, looks good to me.
Though I did not face any issue with dt_binding_check, agreed, the
earlier change was too permissive. Disallowing reg/clocks for the NOCs
without MMIO/clocks and the virtual providers is the right approach.

As you noted, the previous schema effectively allowed describing
non-existent resources, and this change ensures such issues are caught
early by dt_binding_check.

Thanks,
Odelu

On Sat, 29 Nov 2025 10:46:13 +0100, Krzysztof Kozlowski wrote:
> Commit 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks
> properties to enable QoS on sa8775p") claims that all interconnects have
> clocks and MMIO address space, but that is just not true.  Only few
> have.  Bindings should restrict properties and should not allow
> specifying non-existing hardware description, so fix missing constraints
> for 'reg' and 'clocks'.
> 
> Fixes: 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks properties to enable QoS on sa8775p")
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> ---
>  .../interconnect/qcom,sa8775p-rpmh.yaml       | 31 +++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 

Acked-by: Rob Herring (Arm) <robh@kernel.org>

On Sat, 29 Nov 2025 10:46:13 +0100, Krzysztof Kozlowski wrote:
> Commit 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks
> properties to enable QoS on sa8775p") claims that all interconnects have
> clocks and MMIO address space, but that is just not true.  Only few
> have.  Bindings should restrict properties and should not allow
> specifying non-existing hardware description, so fix missing constraints
> for 'reg' and 'clocks'.
> 
> Fixes: 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks properties to enable QoS on sa8775p")
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> ---
>  .../interconnect/qcom,sa8775p-rpmh.yaml       | 31 +++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/thermal/thermal-sensor.example.dtb: /example-0/soc/thermal-sensor@c263000: failed to match any schema with compatible: ['qcom,sdm845-tsens', 'qcom,tsens-v2']
Documentation/devicetree/bindings/thermal/thermal-sensor.example.dtb: /example-0/soc/thermal-sensor@c263000: failed to match any schema with compatible: ['qcom,sdm845-tsens', 'qcom,tsens-v2']
Documentation/devicetree/bindings/thermal/thermal-sensor.example.dtb: /example-0/soc/thermal-sensor@c265000: failed to match any schema with compatible: ['qcom,sdm845-tsens', 'qcom,tsens-v2']
Documentation/devicetree/bindings/thermal/thermal-sensor.example.dtb: /example-0/soc/thermal-sensor@c265000: failed to match any schema with compatible: ['qcom,sdm845-tsens', 'qcom,tsens-v2']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20251129094612.16838-2-krzysztof.kozlowski@oss.qualcomm.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

On Sat, Nov 29, 2025 at 05:22:15AM -0600, Rob Herring (Arm) wrote:
> 
> On Sat, 29 Nov 2025 10:46:13 +0100, Krzysztof Kozlowski wrote:
> > Commit 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks
> > properties to enable QoS on sa8775p") claims that all interconnects have
> > clocks and MMIO address space, but that is just not true.  Only few
> > have.  Bindings should restrict properties and should not allow
> > specifying non-existing hardware description, so fix missing constraints
> > for 'reg' and 'clocks'.
> > 
> > Fixes: 8a55fbe4c94d ("dt-bindings: interconnect: add reg and clocks properties to enable QoS on sa8775p")
> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> > ---
> >  .../interconnect/qcom,sa8775p-rpmh.yaml       | 31 +++++++++++++++++++
> >  1 file changed, 31 insertions(+)
> > 
> 
> My bot found errors running 'make dt_binding_check' on your patch:
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> Documentation/devicetree/bindings/thermal/thermal-sensor.example.dtb: /example-0/soc/thermal-sensor@c263000: failed to match any schema with compatible: ['qcom,sdm845-tsens', 'qcom,tsens-v2']
> Documentation/devicetree/bindings/thermal/thermal-sensor.example.dtb: /example-0/soc/thermal-sensor@c263000: failed to match any schema with compatible: ['qcom,sdm845-tsens', 'qcom,tsens-v2']
> Documentation/devicetree/bindings/thermal/thermal-sensor.example.dtb: /example-0/soc/thermal-sensor@c265000: failed to match any schema with compatible: ['qcom,sdm845-tsens', 'qcom,tsens-v2']
> Documentation/devicetree/bindings/thermal/thermal-sensor.example.dtb: /example-0/soc/thermal-sensor@c265000: failed to match any schema with compatible: ['qcom,sdm845-tsens', 'qcom,tsens-v2']
> 

These are bot hiccups due to broken way of applying of Qualcomm tsens
patch. False positives.

Best regards,
Krzysztof