On Wed, Nov 11, 2026 at 12:58:59PM +0000, Suzuki K Poulose wrote:
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.
This series preserves support AMBA driver probe, "arm,primecell" would continue to work.
That is true ! Sorry, I didn't think of the quirk.
If adding "arm,primecell-periphid" property resolves the issue, I agree that updating the DTS nodes would be better way to resolve issue (for this case, anyway it requires to update DT blobs on broken platforms).
Thanks, Leo