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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2edb6e0d5c0sm3148065ad.71.2026.11.09.17.21.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 17:22:01 -0800 (PST) From: Jie Gan Date: Tue, 10 Nov 2026 09:21:17 +0800 Subject: [PATCH v7 4/5] arm64: dts: qcom: sm8750: bind traceNoC on the platform bus X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261110-fix-trace-noc-probe-issue-v7-4-2f06905c77fe@oss.qualcomm.com> References: <20261110-fix-trace-noc-probe-issue-v7-0-2f06905c77fe@oss.qualcomm.com> In-Reply-To: <20261110-fix-trace-noc-probe-issue-v7-0-2f06905c77fe@oss.qualcomm.com> To: Suzuki K Poulose , Mike Leach , James Clark , Leo Yan , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , Yuanfang Zhang , Alexander Shishkin , Bjorn Andersson , Konrad Dybcio , Abel Vesa , Jingyi Wang Cc: Jie Gan , linux-arm-msm@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1794273690; l=1677; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=kZiNHGuoVNQkmFL0f1QJxaveTsNubLnCPGMK37H6F3U=; b=e3fMacKJRF3qjdJA+5qwXtZU3e/TGJVbSK8JjnWWrajul9wrlr2x33918PI81Yq/4MBAFZPAN GNkwgEpZYYAC0BEf8rSHydVrEwYZ7b9AW794RJSuX6CJPb9gfS1BoYv X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTEwMDAwNSBTYWx0ZWRfX3hDVjTBtZ1IS mvRBK2gLFFEzamK1Mt7/LJGDbiNS9QIh7PSW8mH/Ta5prIrBxyEFTSaG6HUWqmo/mv7+OlASqP8 mkkSRHZ1Si/RPi4my/up595NFimlr18XgLtGY58cuU5WqPzXY9NcuU8LXUxFDqNzBcO1AQk0OeO VWtQrBfsaQhkiCIDSnd+Xx9Nvvg8TYMktHb07H5dPFt3aNR1tacG9vM+9YcNEXeLObvq1iy3cg/ gvel48FF9XATLp8VtVwEZWog+aVnw69bkshPvtuD+CXyxR4XjlJ28NpTK8wOOe3ygCOcYkk0PBM Pm/1OFKGwZ8XDRbgwGOFoxukBuloCI7Sq0bLxYRoGNadPiEpY1IdLgztdGvBRYewtOcagn7jJzZ 5WloOarKRonEdqTybZFNPjvdqE+P1nVAQwVgAPlaDe19L/gRpFmnvFW5UyqyoSpMVlit1vgJ9zu 7uo4W/cWulnbA772UOg== X-Proofpoint-GUID: SI9QmeZKlKOaQiHnKACxpfjypVR5jgxv X-Proofpoint-ORIG-GUID: SI9QmeZKlKOaQiHnKACxpfjypVR5jgxv X-Proofpoint-Spam-Info: AW1haW4tMjYxMTEwMDAwNSBTYWx0ZWRfX2UmlLRlMATid xMmjrioNaCt4yYOQpzMVFgg/PhfupmRAUOg5kbbzXPDdA2onzIh76HAUs8flX+cGf3TcfKltkie ORTb3tu/Td2G0QGTJEExyOSIVpjz/7U= X-Authority-Analysis: v=2.4 cv=Yr+a1IYX c=1 sm=1 tr=0 ts=6af271ba cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=zJRp6_cAMcgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=7Rut49xxg77_icr6qwgA:9 a=QEXdDO2ut3YA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-10_01,2026-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 phishscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 suspectscore=0 malwarescore=0 lowpriorityscore=0 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2611040001 definitions=main-2611100005 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") Reviewed-by: Konrad Dybcio 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 cf947acc5760..13f05c0d67f6 100644 --- a/arch/arm64/boot/dts/qcom/sm8750.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi @@ -5172,7 +5172,7 @@ 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