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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7992d0e1336sm20657931b3a.59.2025.10.15.22.49.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Oct 2025 22:49:39 -0700 (PDT) From: Yuanfang Zhang Date: Wed, 15 Oct 2025 22:49:32 -0700 Subject: [PATCH v5 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: <20251015-itnoc-v5-3-d7ca2b1cc6df@oss.qualcomm.com> References: <20251015-itnoc-v5-0-d7ca2b1cc6df@oss.qualcomm.com> In-Reply-To: <20251015-itnoc-v5-0-d7ca2b1cc6df@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 , Leo Yan X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1760593774; l=1738; i=yuanfang.zhang@oss.qualcomm.com; s=20250814; h=from:subject:message-id; bh=/fUCilk7cQkDDYH/V2caZpg8zsP8hHAk09zzZjiZ0fA=; b=ajq5aJ5vu6EVUG4FtscuPxM+NeStMRmsybGkIGaPj8vR80rOniix1u/fRIWNP3dHNUfDaxzhq T4/39IC6fSfD/YQQkOgc/SVlH6t5CS+H9ew9BhhtWKwPbFgVl8+EvH2 X-Developer-Key: i=yuanfang.zhang@oss.qualcomm.com; a=ed25519; pk=9oS/FoPW5k0CsqSDDrPlnV+kVIOUaAe0O5pr4M1wHgY= X-Proofpoint-GUID: ry9vo0Gu125A0XCbvp4DLJXg_phRIACy X-Proofpoint-ORIG-GUID: ry9vo0Gu125A0XCbvp4DLJXg_phRIACy X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDExMDAyMCBTYWx0ZWRfX6ayhMEWQLrcf GuSi+JzS68h7O6xG7+VBfzL7Heamvnn8oyD4fXXew2kjp/U7UcstmmPM7lCK6dpytnQ1376Gfri ac+gU9mHuQCCrzDjsT/bEkrmM8xf2YWklNcaPlHDUslnFaAtZZUC88/RsMOAmz3EsOXP2rUXc4n /eyKWwIF8mRlvrbp8K5sJUxAaORU8uWUs3vG38aV9ZXpgpCJ+PovTyq0lV/i8AslXyUbq/BhLFs ltMy+7jCyuRnXf9j9m0f85EEq59kNkZyLIqNlolorQWto5xfwkUiwc6qOVfKPCdruNGvOM/f2u+ HzLxBBSA81icfoTMH2P8I4O2smTCM/zEE5Q+x8GTl8OVRoAGl1S2nwwDsrMJn4GSoFyO18HXsaK MYlgCGD29/gO/qrZgGrW/lg4sbPgsQ== X-Authority-Analysis: v=2.4 cv=V71wEOni c=1 sm=1 tr=0 ts=68f08775 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=7CQSdrXTAAAA:8 a=qearADheJa7ujHrKWl4A:9 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 a=a-qgeE7W1pNrGK8U0ZQC:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-15_07,2025-10-13_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 malwarescore=0 spamscore=0 adultscore=0 suspectscore=0 impostorscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510020000 definitions=main-2510110020 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 5be882300d79bc0173aa6a19d7da1d48c4aaca9c..2c5370497076536bfa868f0d80d= b775ef242968b 100644 --- a/drivers/hwtracing/coresight/coresight-tnoc.c +++ b/drivers/hwtracing/coresight/coresight-tnoc.c @@ -301,6 +301,28 @@ 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" }, {} @@ -314,6 +336,7 @@ 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