Re: [PATCH v7 0/5] Fix traceNoC probe issue on multiple QCOM platforms

[Suzuki K Poulose]

On 10/11/2026 15:46, Rob Herring wrote:
> On Tue, Nov 10, 2026 at 09:21:13AM +0800, Jie Gan wrote:
> > The CoreSight TNOC (Trace Network-On-Chip) binding so far only allowed the
> > two-string AMBA form "qcom,coresight-tnoc", "arm,primecell". That form
> > forces the device onto the AMBA bus, where the driver must read the
> > peripheral ID from the device registers during probe. On several QCOM
> > platforms this AMBA peripheral-ID probing fails, so the traceNoC device
> > never probes and its trace path is unavailable.
>
> But it works fine on some platforms? We have a property to override the
> peripheral-ID which would solve your issue. That would be much simpler
> and avoid the ABI break on any of the working platforms.

That is true ! Sorry, I didn't think of the quirk.

> But this is already applied and it's not any platform I use, so I don't
> really care.

I am happy to revert these changes and let the DTS be fixed.

Cheers
Suzuki


> Rob