From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Document the Interrupt Control Unit (ICU) used on the Renesas RZ/V2N SoC.
Although the ICU closely matches the design found on the RZ/V2H(P) family,
it differs in its register layout, particularly in the reduced set of
ECCRAM related registers. These variations require a distinct compatible
string so that software can correctly match and handle the RZ/V2N
implementation.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
v1->v2:
- Dropped using RZ/V2H compatible as a fallback.
---
 .../bindings/interrupt-controller/renesas,rzv2h-icu.yaml         | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/renesas,rzv2h-icu.yaml b/Documentation/devicetree/bindings/interrupt-controller/renesas,rzv2h-icu.yaml
index 3f99c8645767..cb244b8f5e1c 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/renesas,rzv2h-icu.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,rzv2h-icu.yaml
@@ -22,6 +22,7 @@ properties:
   compatible:
     enum:
       - renesas,r9a09g047-icu # RZ/G3E
+      - renesas,r9a09g056-icu # RZ/V2N
       - renesas,r9a09g057-icu # RZ/V2H(P)
 
   '#interrupt-cells':
-- 
2.52.0

Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

On Thu, 27 Nov 2025 16:24:46 +0000, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> 
> Document the Interrupt Control Unit (ICU) used on the Renesas RZ/V2N SoC.
> Although the ICU closely matches the design found on the RZ/V2H(P) family,
> it differs in its register layout, particularly in the reduced set of
> ECCRAM related registers. These variations require a distinct compatible
> string so that software can correctly match and handle the RZ/V2N
> implementation.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> v1->v2:
> - Dropped using RZ/V2H compatible as a fallback.
> ---
>  .../bindings/interrupt-controller/renesas,rzv2h-icu.yaml         | 1 +
>  1 file changed, 1 insertion(+)
> 

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

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/slimbus/slimbus.example.dtb: slim@28080000 (qcom,slim-ngd-v1.5.0): 'audio-codec@1,0' does not match any of the regexes: '^pinctrl-[0-9]+$', '^slim@[0-9a-f]+$'
	from schema $id: http://devicetree.org/schemas/slimbus/qcom,slim-ngd.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/slimbus/slimbus.example.dtb: slim@28080000 (qcom,slim-ngd-v1.5.0): #address-cells: 1 was expected
	from schema $id: http://devicetree.org/schemas/slimbus/qcom,slim-ngd.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/slimbus/slimbus.example.dtb: slim@28080000 (qcom,slim-ngd-v1.5.0): 'dmas' is a required property
	from schema $id: http://devicetree.org/schemas/slimbus/qcom,slim-ngd.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/slimbus/slimbus.example.dtb: slim@28080000 (qcom,slim-ngd-v1.5.0): 'dma-names' is a required property
	from schema $id: http://devicetree.org/schemas/slimbus/qcom,slim-ngd.yaml
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/20251127162447.320971-2-prabhakar.mahadev-lad.rj@bp.renesas.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 Thu, 27 Nov 2025 at 17:24, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Document the Interrupt Control Unit (ICU) used on the Renesas RZ/V2N SoC.
> Although the ICU closely matches the design found on the RZ/V2H(P) family,
> it differs in its register layout, particularly in the reduced set of
> ECCRAM related registers. These variations require a distinct compatible
> string so that software can correctly match and handle the RZ/V2N
> implementation.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> v1->v2:
> - Dropped using RZ/V2H compatible as a fallback.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds