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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-246ed91ee20sm92497015ad.136.2025.08.28.02.27.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Aug 2025 02:27:27 -0700 (PDT) From: Yuanfang Zhang Date: Thu, 28 Aug 2025 02:27:22 -0700 Subject: [PATCH v3 1/3] dt-bindings: arm: qcom: Add Coresight Interconnect TNOC 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: quoted-printable Message-Id: <20250828-itnoc-v3-1-f1b55dea7a27@oss.qualcomm.com> References: <20250828-itnoc-v3-0-f1b55dea7a27@oss.qualcomm.com> In-Reply-To: <20250828-itnoc-v3-0-f1b55dea7a27@oss.qualcomm.com> To: Suzuki K Poulose , Mike Leach , James Clark , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexander Shishkin Cc: kernel@oss.qualcomm.com, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Yuanfang Zhang X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1756373245; l=3025; i=yuanfang.zhang@oss.qualcomm.com; s=20250814; h=from:subject:message-id; bh=ubXxXSq3HRpwyGgZB9pVBtD7LlF/Et+jBwYXGMM3AgA=; b=Zgwlt3jRD02lL12U66KU4jhzO1e2GLLqoZX5wl63ys0VNVc0JVoilJq8ycPw8K9YZrM2ChWM9 6TEHNPVDzgxDr88uDQC8FjEDBveI9a2wEv/4o604J5gJoL0jiXMHGkV X-Developer-Key: i=yuanfang.zhang@oss.qualcomm.com; a=ed25519; pk=9oS/FoPW5k0CsqSDDrPlnV+kVIOUaAe0O5pr4M1wHgY= X-Authority-Analysis: v=2.4 cv=VtIjA/2n c=1 sm=1 tr=0 ts=68b02101 cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=gEfo2CItAAAA:8 a=EUspDBNiAAAA:8 a=-QmmxQN2S_yWG1-YAlkA:9 a=QEXdDO2ut3YA:10 a=324X-CrmTo6CU4MGRt3R:22 a=sptkURWiP4Gy88Gu7hUp:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODIzMDAzMiBTYWx0ZWRfXx3kwYFxMF5xk xQeU5Pd5QUbABnRNuImWiz9QAKjcjBaejvFd+BcbBmgJMr2onAl7ghl+yl3y0tkjfKlxltugkJR kOpDBTxcvIgD4v6XVBSWzBurlZvqyZMKUuAUN3D3/SUP7dgeF9bVFWjy/KueySNW0JA4tCyzJFn kIwfyU8fL8MbE5hmkNBYQe2YhJNnvnnt228D06FaC5lorWAbET8igeiYj55oqmMZrIVGQr4vnKK KwyLlLnz+12y7eFNzcz1yAkYnj59y273c/dfk2F4tzABHPxTHwJKKnM/knBV0JnZPc8dOGyDnTs 96+pekMfxE+U1VhAfgUKMnxQ8yBczkpw0v0D1DcF404KI7D6Vn7V9tKGG3+/RvEXxLmz6hDk1oi cs+2VRgr X-Proofpoint-GUID: GGRkIwEaMw7ViyXSszH720sbOI24zKKr X-Proofpoint-ORIG-GUID: GGRkIwEaMw7ViyXSszH720sbOI24zKKr X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-28_02,2025-08-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 suspectscore=0 malwarescore=0 adultscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508230032 Add device tree binding for Qualcomm Coresight Interconnect Trace Network On Chip (ITNOC). This TNOC acts as a CoreSight graph link that forwards trace data from a subsystem to the Aggregator TNOC, without aggregation or ATID functionality. Signed-off-by: Yuanfang Zhang Reviewed-by: Rob Herring (Arm) --- .../bindings/arm/qcom,coresight-itnoc.yaml | 90 ++++++++++++++++++= ++++ 1 file changed, 90 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yam= l b/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml new file mode 100644 index 0000000000000000000000000000000000000000..8936bb7c3e8ea267ca66e0cc3fc= 4dac33ba6de30 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml @@ -0,0 +1,90 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/arm/qcom,coresight-itnoc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm Interconnect Trace Network On Chip - ITNOC + +maintainers: + - Yuanfang Zhang + +description: + The Interconnect TNOC is a CoreSight graph link that forwards trace data + from a subsystem to the Aggregator TNOC. Compared to Aggregator TNOC, it + does not have aggregation and ATID functionality. + +properties: + $nodename: + pattern: "^itnoc(@[0-9a-f]+)?$" + + compatible: + const: qcom,coresight-itnoc + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-names: + items: + - const: apb + + in-ports: + $ref: /schemas/graph.yaml#/properties/ports + + patternProperties: + '^port(@[0-9a-f]{1,2})?$': + description: Input connections from CoreSight Trace Bus + $ref: /schemas/graph.yaml#/properties/port + + out-ports: + $ref: /schemas/graph.yaml#/properties/ports + additionalProperties: false + + properties: + port: + description: out connections to aggregator TNOC + $ref: /schemas/graph.yaml#/properties/port + +required: + - compatible + - reg + - clocks + - clock-names + - in-ports + - out-ports + +additionalProperties: false + +examples: + - | + itnoc@109ac000 { + compatible =3D "qcom,coresight-itnoc"; + reg =3D <0x109ac000 0x1000>; + + clocks =3D <&aoss_qmp>; + clock-names =3D "apb"; + + in-ports { + #address-cells =3D <1>; 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-246ed91ee20sm92497015ad.136.2025.08.28.02.27.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Aug 2025 02:27:28 -0700 (PDT) From: Yuanfang Zhang Date: Thu, 28 Aug 2025 02:27:23 -0700 Subject: [PATCH v3 2/3] coresight-tnoc: add platform driver to support Interconnect TNOC 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: quoted-printable Message-Id: <20250828-itnoc-v3-2-f1b55dea7a27@oss.qualcomm.com> References: <20250828-itnoc-v3-0-f1b55dea7a27@oss.qualcomm.com> In-Reply-To: <20250828-itnoc-v3-0-f1b55dea7a27@oss.qualcomm.com> To: Suzuki K Poulose , Mike Leach , James Clark , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexander Shishkin Cc: kernel@oss.qualcomm.com, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Yuanfang Zhang X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1756373245; l=7284; i=yuanfang.zhang@oss.qualcomm.com; s=20250814; h=from:subject:message-id; bh=Z1eZnevWYnpyIWyKbJ9mcPze0cP6MZDj2l5bPS/eoB8=; b=nAWlBA6HM/gtRZPVJfqqW6BAai6jca5mXaH+6xDBN0pEgZT/mWyyMrmD1X74QIykxkiSoeO4b 6NLb6TAq4fkBvCmg8WgK4KpBzdjqQFLGLen0v53MUOx6H/VABzcfQnB X-Developer-Key: i=yuanfang.zhang@oss.qualcomm.com; a=ed25519; pk=9oS/FoPW5k0CsqSDDrPlnV+kVIOUaAe0O5pr4M1wHgY= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODIzMDAzMyBTYWx0ZWRfX1ljwNVua8pq/ YieY7ZZ0GVrtx0QrTzGpOeZAbZVL0jYXGXk+50rhS+JCKhCYWVH+mb973Vp4hfZfWfWjIUqVNmj tjGa2mgXIG7JXVZ8Mg5uBbkIntew91tu+NH6FtOQt3i5KPIQmtewJev/Nf1tJyH7pcK96mBiAsZ MT9Y4FBiN6JNO5pyvWZXCfPnW44BnEpEOWAB5dqNSgM+vcUrFbn0ieynFcsZcy4qKILEYHeUUbb jLpUTkhNQ65/SICHb+M5PUcw4ORWvb0FM7vFf1KHqaC3LPQyYRHMUWn9Y0HBU9b1XRSXyQaozLr wy1V1qYZ1LfUp/+m0kOdIkvf1OzAD97vZVaotj9rUDiV6xZrlhK0G28Uo+6up4NyGd03XjwuO+x 4uluCntl X-Authority-Analysis: v=2.4 cv=Lco86ifi c=1 sm=1 tr=0 ts=68b02102 cx=c_pps a=Qgeoaf8Lrialg5Z894R3/Q==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=EUspDBNiAAAA:8 a=YgsqhSH9U0MoioIrZkcA:9 a=QEXdDO2ut3YA:10 a=x9snwWr2DeNwDh03kgHS:22 X-Proofpoint-GUID: edNyshiXAguNbz29mOgcJKp80OSMpUbI X-Proofpoint-ORIG-GUID: edNyshiXAguNbz29mOgcJKp80OSMpUbI X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-28_02,2025-08-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 clxscore=1015 malwarescore=0 spamscore=0 suspectscore=0 phishscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508230033 This patch adds platform driver support for the CoreSight Interconnect TNOC, Interconnect TNOC is a CoreSight link that forwards trace data from a subsystem to the Aggregator TNOC. Compared to Aggregator TNOC, it does not have aggregation and ATID functionality. Key changes: - Add platform driver `coresight-itnoc` with device tree match support. - Refactor probe logic into a common `_tnoc_probe()` function. - Conditionally initialize ATID only for AMBA-based TNOC blocks. Signed-off-by: Yuanfang Zhang Reviewed-by: Leo Yan --- drivers/hwtracing/coresight/coresight-tnoc.c | 116 +++++++++++++++++++++++= +--- 1 file changed, 103 insertions(+), 13 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-tnoc.c b/drivers/hwtraci= ng/coresight/coresight-tnoc.c index d542df46ea39314605290311f683010337bfd4bd..ca96c3e66d683d6c1d1215b1b48= d2f7b7f58d5b0 100644 --- a/drivers/hwtracing/coresight/coresight-tnoc.c +++ b/drivers/hwtracing/coresight/coresight-tnoc.c @@ -34,6 +34,7 @@ * @base: memory mapped base address for this component. * @dev: device node for trace_noc_drvdata. * @csdev: component vitals needed by the framework. + * @pclk: APB clock if present, otherwise NULL * @spinlock: serialize enable/disable operation. * @atid: id for the trace packet. */ @@ -41,8 +42,9 @@ struct trace_noc_drvdata { void __iomem *base; struct device *dev; struct coresight_device *csdev; + struct clk *pclk; spinlock_t spinlock; - u32 atid; + int atid; }; =20 DEFINE_CORESIGHT_DEVLIST(trace_noc_devs, "traceNoc"); @@ -51,12 +53,17 @@ static void trace_noc_enable_hw(struct trace_noc_drvdat= a *drvdata) { u32 val; =20 + /* No valid ATID, simply enable the unit */ + if (drvdata->atid =3D=3D -EOPNOTSUPP) { + writel(TRACE_NOC_CTRL_PORTEN, drvdata->base + TRACE_NOC_CTRL); + return; + } + /* Set ATID */ writel_relaxed(drvdata->atid, drvdata->base + TRACE_NOC_XLD); =20 /* Set the data word count between 'SYNC' packets */ writel_relaxed(TRACE_NOC_SYNC_INTERVAL, drvdata->base + TRACE_NOC_SYNCR); - /* Set the Control register: * - Set the FLAG packets to 'FLAG' packets * - Set the FREQ packets to 'FREQ_TS' packets @@ -68,8 +75,8 @@ static void trace_noc_enable_hw(struct trace_noc_drvdata = *drvdata) val &=3D ~TRACE_NOC_CTRL_FLAGTYPE; val |=3D TRACE_NOC_CTRL_FREQTYPE; val |=3D TRACE_NOC_CTRL_PORTEN; - writel(val, drvdata->base + TRACE_NOC_CTRL); + } =20 static int trace_noc_enable(struct coresight_device *csdev, struct coresig= ht_connection *inport, @@ -124,6 +131,11 @@ static int trace_noc_init_default_data(struct trace_no= c_drvdata *drvdata) { int atid; =20 + if (!dev_is_amba(drvdata->dev)) { + drvdata->atid =3D -EOPNOTSUPP; + return 0; + } + atid =3D coresight_trace_id_get_system_id(); if (atid < 0) return atid; @@ -149,8 +161,21 @@ static struct attribute *coresight_tnoc_attrs[] =3D { NULL, }; =20 +static umode_t trace_id_is_visible(struct kobject *kobj, + struct attribute *attr, int idx) +{ + struct device *dev =3D kobj_to_dev(kobj); + struct trace_noc_drvdata *drvdata =3D dev_get_drvdata(dev->parent); + + if (attr =3D=3D &dev_attr_traceid.attr && drvdata->atid < 0) + return 0; + + return attr->mode; +} + static const struct attribute_group coresight_tnoc_group =3D { .attrs =3D coresight_tnoc_attrs, + .is_visible =3D trace_id_is_visible, }; =20 static const struct attribute_group *coresight_tnoc_groups[] =3D { @@ -158,9 +183,8 @@ static const struct attribute_group *coresight_tnoc_gro= ups[] =3D { NULL, }; =20 -static int trace_noc_probe(struct amba_device *adev, const struct amba_id = *id) +static int _tnoc_probe(struct device *dev, struct resource *res) { - struct device *dev =3D &adev->dev; struct coresight_platform_data *pdata; struct trace_noc_drvdata *drvdata; struct coresight_desc desc =3D { 0 }; @@ -173,16 +197,20 @@ static int trace_noc_probe(struct amba_device *adev, = const struct amba_id *id) pdata =3D coresight_get_platform_data(dev); if (IS_ERR(pdata)) return PTR_ERR(pdata); - adev->dev.platform_data =3D pdata; + dev->platform_data =3D pdata; =20 drvdata =3D devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); if (!drvdata) return -ENOMEM; =20 - drvdata->dev =3D &adev->dev; + drvdata->dev =3D dev; dev_set_drvdata(dev, drvdata); =20 - drvdata->base =3D devm_ioremap_resource(dev, &adev->res); + ret =3D coresight_get_enable_clocks(dev, &drvdata->pclk, NULL); + if (ret) + return ret; + + drvdata->base =3D devm_ioremap_resource(dev, res); if (IS_ERR(drvdata->base)) return PTR_ERR(drvdata->base); =20 @@ -195,20 +223,31 @@ static int trace_noc_probe(struct amba_device *adev, = const struct amba_id *id) desc.ops =3D &trace_noc_cs_ops; desc.type =3D CORESIGHT_DEV_TYPE_LINK; desc.subtype.link_subtype =3D CORESIGHT_DEV_SUBTYPE_LINK_MERG; - desc.pdata =3D adev->dev.platform_data; - desc.dev =3D &adev->dev; + desc.pdata =3D pdata; + desc.dev =3D dev; desc.access =3D CSDEV_ACCESS_IOMEM(drvdata->base); desc.groups =3D coresight_tnoc_groups; drvdata->csdev =3D coresight_register(&desc); if (IS_ERR(drvdata->csdev)) { - coresight_trace_id_put_system_id(drvdata->atid); + if (drvdata->atid > 0) + coresight_trace_id_put_system_id(drvdata->atid); return PTR_ERR(drvdata->csdev); } - pm_runtime_put(&adev->dev); =20 return 0; } =20 +static int trace_noc_probe(struct amba_device *adev, const struct amba_id = *id) +{ + int ret; + + ret =3D _tnoc_probe(&adev->dev, &adev->res); + if (!ret) + pm_runtime_put(&adev->dev); + + return ret; +} + static void trace_noc_remove(struct amba_device *adev) { struct trace_noc_drvdata *drvdata =3D dev_get_drvdata(&adev->dev); @@ -236,7 +275,58 @@ static struct amba_driver trace_noc_driver =3D { .id_table =3D trace_noc_ids, }; =20 -module_amba_driver(trace_noc_driver); +static int itnoc_probe(struct platform_device *pdev) +{ + struct resource *res =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); + int ret; + + pm_runtime_get_noresume(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + + ret =3D _tnoc_probe(&pdev->dev, res); + pm_runtime_put(&pdev->dev); + if (ret) + pm_runtime_disable(&pdev->dev); + + return ret; +} + +static void itnoc_remove(struct platform_device *pdev) +{ + struct trace_noc_drvdata *drvdata =3D platform_get_drvdata(pdev); + + coresight_unregister(drvdata->csdev); + pm_runtime_disable(&pdev->dev); +} + +static const struct of_device_id itnoc_of_match[] =3D { + { .compatible =3D "qcom,coresight-itnoc" }, + {} +}; +MODULE_DEVICE_TABLE(of, itnoc_of_match); + +static struct platform_driver itnoc_driver =3D { + .probe =3D itnoc_probe, + .remove =3D itnoc_remove, + .driver =3D { + .name =3D "coresight-itnoc", + .of_match_table =3D itnoc_of_match, + .suppress_bind_attrs =3D true, + }, +}; + +static int __init tnoc_init(void) +{ + return coresight_init_driver("tnoc", &trace_noc_driver, &itnoc_driver, TH= IS_MODULE); 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-246ed91ee20sm92497015ad.136.2025.08.28.02.27.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Aug 2025 02:27:29 -0700 (PDT) From: Yuanfang Zhang Date: Thu, 28 Aug 2025 02:27:24 -0700 Subject: [PATCH v3 3/3] coresight-tnoc: Add runtime PM support for Interconnect TNOC 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: quoted-printable Message-Id: <20250828-itnoc-v3-3-f1b55dea7a27@oss.qualcomm.com> References: <20250828-itnoc-v3-0-f1b55dea7a27@oss.qualcomm.com> In-Reply-To: <20250828-itnoc-v3-0-f1b55dea7a27@oss.qualcomm.com> To: Suzuki K Poulose , Mike Leach , James Clark , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexander Shishkin Cc: kernel@oss.qualcomm.com, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Yuanfang Zhang X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1756373245; l=1698; i=yuanfang.zhang@oss.qualcomm.com; s=20250814; h=from:subject:message-id; bh=o+5/ACwsPDXaRMmwhSug61zH+Sv2mKJhHu/g8cXlGAs=; b=ilhqjytLS638zwMPR8kFJ/BYFsh+0ivhmo7Xklxsa8n4A7l49eb/ttMdW9+Ms3EmE4w7v4fuG ep3zeVkPCiaAko6vEjW7vzVFmKwBjdMqQjwMaWGaHyNIzMJygusBs0P X-Developer-Key: i=yuanfang.zhang@oss.qualcomm.com; a=ed25519; pk=9oS/FoPW5k0CsqSDDrPlnV+kVIOUaAe0O5pr4M1wHgY= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODIzMDAzNCBTYWx0ZWRfXz8y4Qk0p/0p4 4hlr9KGmxdjcUTQ0CMXy1a7NPA2LIY16cPrP7J+EY7K1x4GgJKvELtbUy7mEcF5cQbzRcyoowF/ eRBcXGv+R1IgkqyjpKG0nOiD0uLcxil+SLHzCKpRi+DdLvwHLfPr0yMsL+a7tIQ7YMgYk8EgaH2 IXglS5CsV13bTIgcAni6FNKY13JZ2chkyOZs5ntkXpr8zhKcY/6kdCCxOG+P9Pt6ivU6qTnms+B OkjidGXBZwkhtB8z32GdtDJ90r0BWH2rO6mQtqAyspna9kTYolhe1L7cybDO5QPLTvDiEHWR7lu zPxfKt8wryctTg38PUkoTi63uExre/kZrVPi5gP7wZv06ovhKZT6Movuqs7RexHrPuT18t47va/ QHJZjIvJ X-Proofpoint-GUID: nc-hAHHDcZ5CEFwj9zqB09MXq21VevK5 X-Authority-Analysis: v=2.4 cv=K+AiHzWI c=1 sm=1 tr=0 ts=68b02103 cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=EUspDBNiAAAA:8 a=qearADheJa7ujHrKWl4A:9 a=QEXdDO2ut3YA:10 a=GvdueXVYPmCkWapjIL-Q:22 X-Proofpoint-ORIG-GUID: nc-hAHHDcZ5CEFwj9zqB09MXq21VevK5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-28_02,2025-08-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 bulkscore=0 clxscore=1015 adultscore=0 impostorscore=0 priorityscore=1501 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508230034 This patch adds runtime power management support for platform-based CoreSight Interconnect TNOC (ITNOC) devices. It introduces suspend and resume callbacks to manage the APB clock (`pclk`) during device runtime transitions. Signed-off-by: Yuanfang Zhang Reviewed-by: Leo Yan --- drivers/hwtracing/coresight/coresight-tnoc.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-tnoc.c b/drivers/hwtraci= ng/coresight/coresight-tnoc.c index ca96c3e66d683d6c1d1215b1b48d2f7b7f58d5b0..b744354b47c861370a247e1a6ce= 88563aa01c4aa 100644 --- a/drivers/hwtracing/coresight/coresight-tnoc.c +++ b/drivers/hwtracing/coresight/coresight-tnoc.c @@ -300,6 +300,28 @@ static void itnoc_remove(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); } =20 +#ifdef CONFIG_PM +static int itnoc_runtime_suspend(struct device *dev) +{ + struct trace_noc_drvdata *drvdata =3D dev_get_drvdata(dev); + + clk_disable_unprepare(drvdata->pclk); + + return 0; +} + +static int itnoc_runtime_resume(struct device *dev) +{ + struct trace_noc_drvdata *drvdata =3D dev_get_drvdata(dev); + + return clk_prepare_enable(drvdata->pclk); +} +#endif + +static const struct dev_pm_ops itnoc_dev_pm_ops =3D { + SET_RUNTIME_PM_OPS(itnoc_runtime_suspend, itnoc_runtime_resume, NULL) +}; + static const struct of_device_id itnoc_of_match[] =3D { { .compatible =3D "qcom,coresight-itnoc" }, {} @@ -313,6 +335,7 @@ static struct platform_driver itnoc_driver =3D { .name =3D "coresight-itnoc", .of_match_table =3D itnoc_of_match, .suppress_bind_attrs =3D true, + .pm =3D &itnoc_dev_pm_ops, }, }; =20 --=20 2.34.1