Re: [PATCH 1/3] dt-bindings: i3c: xlnx: Add IBI and hot-join capability properties

On Fri, Aug 14, 2026 at 05:21:53PM +0530, Shubham Patil wrote:
> In-Band Interrupt and Hot-Join are synthesis-time options of the AXI I3C
> IP. Describe them with two boolean properties.
> 
> A Hot-Join request is acknowledged by the IBI machinery, so a hot-join
> capable design is always IBI capable as well. Both events are reported
> through the controller interrupt, which is therefore required whenever
> the capability is present.
> 
> Signed-off-by: Shubham Patil <[email protected]>
> ---
>  .../bindings/i3c/xlnx,axi-i3c-1.0.yaml        | 23 +++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/i3c/xlnx,axi-i3c-1.0.yaml b/Documentation/devicetree/bindings/i3c/xlnx,axi-i3c-1.0.yaml
> index 2caa245a8656..07e3d0b4d767 100644
> --- a/Documentation/devicetree/bindings/i3c/xlnx,axi-i3c-1.0.yaml
> +++ b/Documentation/devicetree/bindings/i3c/xlnx,axi-i3c-1.0.yaml
> @@ -32,13 +32,34 @@ properties:
>    interrupts:
>      maxItems: 1
>  
> +  xlnx,ibi-capable:
> +    type: boolean
> +    description:
> +      The IP is synthesized with In-Band Interrupt support. IBIs are reported
> +      through the controller interrupt.
> +
> +  xlnx,hj-capable:

tbh, I'd prefer if these were spelt out a little bit more, characters
are cheap. Not a big deal though.

> +    type: boolean
> +    description:
> +      The IP is synthesized with Hot-Join support. A Hot-Join request is
> +      acknowledged by the same machinery as an In-Band Interrupt.
> +
>  required:
>    - compatible
>    - reg
>    - clocks
>  
> +dependencies:
> +  xlnx,hj-capable: ["xlnx,ibi-capable"]
> +
>  allOf:
>    - $ref: i3c.yaml#
> +  - if:
> +      required:
> +        - xlnx,ibi-capable
> +    then:
> +      required:
> +        - interrupts

Why is one dependency expressed this way, and the other expressed using
the dependencies property? Can the interrupts property be handled that
way too?

Cheers,
Conor.

>  
>  unevaluatedProperties: false
>  
> @@ -54,5 +75,7 @@ examples:
>          interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
>          #address-cells = <3>;
>          #size-cells = <0>;
> +        xlnx,ibi-capable;
> +        xlnx,hj-capable;
>      };
>  ...
> -- 
> 2.34.1
>

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