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Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > Hi Frank, > > On 8/14/2026 10:37 PM, Frank Li wrote: > > [You don't often get email from frank.li@oss.nxp.com. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > > > Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding. > > > > > > 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 > > > --- > > > .../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: > > > + 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. > > > + > > > > The compatiblity xlnx,axi-i3c-1.0 already indicates such cap. Do you have > > variance. such as > > > > one Soc have two instances. > > instance 1 have hj and ibi cap > > instance 2 no hj and ibi cap > > Yes, exactly that. The AXI I3C core is not a hard block: it is soft IP > instantiated in the FPGA fabric, and IBI and Hot-Join are per-instance > parameters selected in Vivado when the design is built. I suggest put it i3c.yaml capable-ibi: - enum: ["default", "enable", "disable"] to overwrite auto detect from hardware for difference instances case. put default here to allow overlay dtso to overwrite it since overlay can't delete property. I suppose not only xlnx have such problems. Anyways, need dt team to provide suggestions Frank > > > > > If new version support HJ and IBI, need use new compatible string. > > The compatible does track the IP version, and a future AXI I3C v2.0 > would get its own string. But IBI and Hot-Join are not version > differences: they are independent build time options of this same v1.0 > core, so putting them in the compatible would mean several strings for > one IP version, growing combinatorially with every future option. > > Thanks, > Shubham> > > Frank > > > > > required: > > > - compatible > > > - reg > > > - clocks > > > > > > +dependencies: > > > + xlnx,hj-capable: ["xlnx,ibi-capable"] > > > + > > > allOf: > > > - $ref: i3c.yaml# > > > + - if: > > > + required: > > > + - xlnx,ibi-capable > > > + then: > > > + required: > > > + - interrupts > > > > > > unevaluatedProperties: false > > > > > > @@ -54,5 +75,7 @@ examples: > > > interrupts = ; > > > #address-cells = <3>; > > > #size-cells = <0>; > > > + xlnx,ibi-capable; > > > + xlnx,hj-capable; > > > }; > > > ... > > > -- > > > 2.34.1 > > > >