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

[Patil, Shubham Sanjay]

Hi Krzysztof,

On 8/17/2026 2:20 PM, Krzysztof Kozlowski wrote:
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> 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 <shubhamsanjay.patil@xxxxxxx>
> > ---
> >   .../bindings/i3c/xlnx,axi-i3c-1.0.yaml        | 23 +++++++++++++++++++
> >   1 file changed, 23 insertions(+)
>
> So the same SoC using this core will have different synthesis options?
> IOW, why isn't this implied by a specific compatible?

Yes. This core is not part of the SoC's fixed hardware: it is a design
compiled into the FPGA fabric. When the core is added to a design in
Vivado, IBI and Hot-Join are options that are turned on or off, so two
builds -- or two instances in the same build -- can use the identical IP
version and still differ in which features are present.

The compatible string identifies the IP core and its version. It says 
nothing about which options were selected when
that instance was built, so it cannot imply the capability.

Thanks,
Shubham

> Best regards,
> Krzysztof