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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-ca5af6df87fsm4517611a12.5.2026.07.09.19.40.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Jul 2026 19:40:19 -0700 (PDT) From: Jie Gan Date: Fri, 10 Jul 2026 10:39:03 +0800 Subject: [PATCH v6 4/5] arm64: dts: qcom: sm8750: bind traceNoC on the platform bus 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: <20260710-fix-tracenoc-probe-issue-v6-4-41eb36fef8d9@oss.qualcomm.com> References: <20260710-fix-tracenoc-probe-issue-v6-0-41eb36fef8d9@oss.qualcomm.com> In-Reply-To: <20260710-fix-tracenoc-probe-issue-v6-0-41eb36fef8d9@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=1783651186; l=1616; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=kUxtfu2GkKubtJdHqbDaFenuC/gQXoog7GcvX2P9CYg=; b=hlg9blVs46R5OiJ16+aISTtFikhio7y1TA4JxSn81vWK6bQvO1MyWoU4RGnN5Kjasstk+58Id xNgxcCOpTOqDrJ6K8vWSPiIWE7O0Etl3i34zOsebsMTQ7McjP4QlPxA X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEwMDAyMyBTYWx0ZWRfX0u2gLU1f77C3 eCWi8GmHFxfEPI27MYKvq5q94VQ5mR4epQgV2g3JA2ekaDTnEfa0zmBqtvEyh7eH3rSvFTVhxnx OzlaKbDmTG4vPWxdurjf92VXCtJ/VOWRWu+SP/TBkSclZ6Z4MzbFumw7JaLGGbQguZOyfCDv74A QSRRXdbOkfWK5J8vjWmWo02NfUt8cbJTikaFf6h/NL5yQS7KTCKpS1+bkSXP/cJFHDweRcNHFyO Fc25g3rggSs+UbrnSNrxn+VHZWrAXtAEsTxTltDUjdS4FJnTREzBMrn/m6YPTDzXW6ZDT78cOfR w2KdgQcv117iyvF3Ez8f9F1HmDtz+Pae/tC5eAX6k5JUsTAFV3TkOtRJZ5R83zteKuFVOCI9JQj 7wmeB61OrrK8pwjKu8mEfYYi7PHrPRXe3wCEe6x9cCEMBr0D+JOl9W5ZlcdKLjFYXTvAnP7MTfI agd8me5jW9y8FTGkJDw== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEwMDAyMyBTYWx0ZWRfX5KfdUQy/PR9Q zC2nC0ct4eaH+XkxrSlu3X3kfTFfGG2DNso+PUXMSurz4uaHD2KPlp8z51jM1yU//tTITINh3Ew qEmVlaMnK0WTrPU8G0fYvx2BjQtSqWQ= X-Proofpoint-GUID: FmaHt3ICZ0RmjL3cHwLGnkbAJS2en6z- X-Proofpoint-ORIG-GUID: FmaHt3ICZ0RmjL3cHwLGnkbAJS2en6z- X-Authority-Analysis: v=2.4 cv=GJ441ONK c=1 sm=1 tr=0 ts=6a505b95 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=i4VRK_AS-aeX222KLmsA:9 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-09_04,2026-07-09_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 suspectscore=0 spamscore=0 phishscore=0 adultscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607100023 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 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. The traceNoC exposes the CID registers, but the Component ID value returned by the hardware is 0x00000000 instead of a valid AMBA Component ID, so the match never succeeds, the AMBA probe fails, and the device is left stuck in deferred probe indefinitely. Drop the "arm,primecell" entry and use the standalone "qcom,coresight-tnoc" compatible, which binds via the platform driver by compatible string and does not rely on the component ID register at all. This lets the device probe on hardware that does not return a valid 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..1e25be41aef5 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-tnoc"; reg = <0x0 0x109ab000 0x0 0x4200>; clocks = <&aoss_qmp>; -- 2.34.1