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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ca37a7102esm23040315ad.6.2026.06.30.18.54.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jun 2026 18:54:39 -0700 (PDT) From: Jie Gan Date: Wed, 01 Jul 2026 09:53:44 +0800 Subject: [PATCH v4 4/5] arm64: dts: qcom: sm8750: fix traceNoC probe issue Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260701-fix-tracenoc-probe-issue-v4-4-aefab449a470@oss.qualcomm.com> References: <20260701-fix-tracenoc-probe-issue-v4-0-aefab449a470@oss.qualcomm.com> In-Reply-To: <20260701-fix-tracenoc-probe-issue-v4-0-aefab449a470@oss.qualcomm.com> To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , Jingyi Wang , Jie Gan , Abel Vesa , Suzuki K Poulose , Mike Leach , James Clark , Leo Yan , Yuanfang Zhang , Abel Vesa , Alexander Shishkin Cc: Konrad Dybcio , 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 X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1782870847; l=1628; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=PCET8Oqhsj9WNLCZ/XUS+HHH9XBuN/KDsAhmhsc1HOE=; b=YKy+xllUw9RH0izO9EqIparMC755sqafsp0VAOQ5ekC4jfS4ZNDSjscTf+3kw/y231kgg3C8e 3fhvMJA7yZMBjxXVyYEA7L6jBAJg644X6v/W9xfks3a/UgSflNtw0di X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzAxMDAxOCBTYWx0ZWRfXyvzO3hDD47v1 YawV0mA1K5xRdQSDbTvbsupk78Ue0XPAheJyfwJEY5NJJLqlzCPoMSb2UwAMRJ+y34DvKhj8dv/ JPbWHl2AFXzFM3akJPR200eip3VTdbvGwB9RS8Y6IlHLFCvXo7nEor/KcwMwLtwfZ8ml/E+YCNj mUrZWO2g7MSRD7YwC67ktreL3UQ3I3DS0hw5K00G2E1mcAKaMW68KaejC/P6AbI1ALPZ4+PI4GZ zHZ8rIvbl7nvQ+o6TnD+i+baOLLEDkoQlgoRT+uiRctIb29SX9JJTifo+vFK44OLWGRZCKb77zz KccJAl2CsWetRoPZSbYEpOMLjZh3j4tIH1Vs152I7ZG2PoIsYnCDjboRyiuSTsN8uxWzFzf7NqJ z4twS18jWYQOOAKVhkLkH9IOsw8+eGPDWBVR0L4gjZuP8eVNTxP0f+UlJG8JcqeJrHjlF+rVPa5 qYiw6w/b8YOVUVYwFNA== X-Proofpoint-GUID: SmpeXuz7vR-J9GMqgBjhqjAljJfC8iQh X-Proofpoint-ORIG-GUID: SmpeXuz7vR-J9GMqgBjhqjAljJfC8iQh X-Authority-Analysis: v=2.4 cv=Ivkutr/g c=1 sm=1 tr=0 ts=6a447361 cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=EUspDBNiAAAA:8 a=5VkFZXXe0QlYWD9W4eUA:9 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzAxMDAxOCBTYWx0ZWRfX8wH3QPmYUvFM sCoIZ+DjarD1BhPTO6zhPSGOf3UMFJvNkf2HlU7gpTvPp1oz9rKDLKRPQwzvgs9WfHrk567Ymk3 gL+G/TW5MszjYndRS9/IQ7a23Hcl7O8= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-30_06,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 malwarescore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607010018 The traceNoC node used the "qcom,coresight-tnoc", "arm,primecell" compatible, which places the device on the AMBA bus. To bind an AMBA device, the bus first reads the peripheral and component ID registers (PID/CID) at the top of the device's register block and matches them against the primecell ID. On this platform the traceNoC does not expose a valid CID in that register, so the read never yields the expected primecell value, the AMBA match fails, and the device is left stuck in deferred probe indefinitely. The Aggregator TNOC is fully described by the "qcom,coresight-agtnoc" compatible, which binds via the platform driver by compatible string and does not rely on reading the primecell ID register at all. Switch the node to that standalone compatible so the device probes on hardware that does not expose a readable CID, while remaining an Aggregator TNOC that retains ATID functionality. Fixes: ebd1eb365cae ("arm64: qcom: dts: sm8750: add coresight nodes") Signed-off-by: Jie Gan --- arch/arm64/boot/dts/qcom/sm8750.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi index fafed417c66f..d58483f9f93a 100644 --- a/arch/arm64/boot/dts/qcom/sm8750.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi @@ -4687,7 +4687,7 @@ tpdm_rdpm_cmb2_out: endpoint { }; tn@109ab000 { - compatible = "qcom,coresight-tnoc", "arm,primecell"; + compatible = "qcom,coresight-agtnoc"; reg = <0x0 0x109ab000 0x0 0x4200>; clocks = <&aoss_qmp>; -- 2.34.1