From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Jie Gan <jie.gan@oss.qualcomm.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Tingwei Zhang <tingwei.zhang@oss.qualcomm.com>,
Jingyi Wang <jingyi.wang@oss.qualcomm.com>,
Abel Vesa <abel.vesa@oss.qualcomm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Mike Leach <mike.leach@arm.com>,
James Clark <james.clark@linaro.org>, Leo Yan <leo.yan@arm.com>,
Yuanfang Zhang <yuanfang.zhang@oss.qualcomm.com>,
Abel Vesa <abelvesa@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, coresight@lists.linaro.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3 3/5] arm64: dts: qcom: kaanapali: fix traceNoC probe issue
Date: Tue, 30 Jun 2026 14:53:53 +0200 [thread overview]
Message-ID: <a88201a7-0a00-48d8-97cd-300d6aa5fc88@oss.qualcomm.com> (raw)
In-Reply-To: <20260630-fix-tracenoc-probe-issue-v3-3-7201e1841e94@oss.qualcomm.com>
On 6/30/26 12:36 PM, Jie Gan wrote:
> The traceNoC node used the "qcom,coresight-tnoc", "arm,primecell"
> compatible, which places the device on the AMBA bus. The AMBA peripheral
> ID probing fails on this platform, so the device never probes.
An interested reader would immediately expect an answer to why that's
the case
> Switch the node to the standalone "qcom,coresight-agtnoc" compatible.
> Dropping "arm,primecell" makes the device probe through the platform
> driver instead of the AMBA bus, which resolves the probe failure while
> keeping it an Aggregator TNOC that retains ATID functionality.
This describes OS behavior. Move your message towards the other
compatible not depending on reading that ID register.
Konrad
next prev parent reply other threads:[~2026-06-30 12:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-30 10:36 [PATCH v3 0/5] Fix traceNoC probe issue on multiple QCOM platforms Jie Gan
2026-06-30 10:36 ` [PATCH v3 1/5] dt-bindings: arm: coresight-tnoc: Add standalone qcom,coresight-agtnoc compatible Jie Gan
2026-06-30 10:36 ` [PATCH v3 2/5] coresight: tnoc: Add AG tnoc standalone compatible to the platform driver Jie Gan
2026-06-30 10:57 ` sashiko-bot
2026-06-30 10:59 ` Jie Gan
2026-06-30 10:36 ` [PATCH v3 3/5] arm64: dts: qcom: kaanapali: fix traceNoC probe issue Jie Gan
2026-06-30 11:08 ` sashiko-bot
2026-06-30 12:53 ` Konrad Dybcio [this message]
2026-06-30 13:44 ` Jie Gan
2026-06-30 10:36 ` [PATCH v3 4/5] arm64: dts: qcom: sm8750: " Jie Gan
2026-06-30 11:19 ` sashiko-bot
2026-06-30 10:36 ` [PATCH v3 5/5] arm64: dts: qcom: glymur: use Aggregator TNOC compatible Jie Gan
2026-06-30 11:31 ` sashiko-bot
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