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Wed, 02 Sep 2026 08:16:47 -0700 (PDT) X-Received: by 2002:ac8:7d44:0:b0:52e:3b7d:df99 with SMTP id d75a77b69052e-53036b4e8cdmr38543531cf.1.1788362206529; Wed, 02 Sep 2026 08:16:46 -0700 (PDT) Received: from [192.168.202.12] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6a67f941dd4sm1212684a12.20.2026.09.02.08.16.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Sep 2026 08:16:45 -0700 (PDT) Message-ID: <8237cae7-0a3c-48ae-a85c-8521cda87015@oss.qualcomm.com> Date: Wed, 2 Sep 2026 17:16:41 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/4] PCI: qcom: Add CGC disable workaround for Nord PCIe To: Krishna Chaitanya Chundru , Vinod Koul , Neil Armstrong , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lorenzo Pieralisi , =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= , Manivannan Sadhasivam , Bjorn Helgaas , Bjorn Andersson , Maxime Chevallier , Philipp Zabel Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org References: <20260828-nord-v2-0-18bf59d19d6f@oss.qualcomm.com> <20260828-nord-v2-3-18bf59d19d6f@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260828-nord-v2-3-18bf59d19d6f@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: Ka0vRNNNnKOVRu8hVW6l7gCCJgHRmhCc X-Authority-Analysis: v=2.4 cv=FeAHAp+6 c=1 sm=1 tr=0 ts=6a983de0 cx=c_pps a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=6pHcnep46kEejBPVP2gA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=a_PwQJl-kcHnX1M80qC6:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAyMDEzNSBTYWx0ZWRfX3g1ZkhYLRyBf UWfpRA1QOe0tmoa0nRnYJW2BiKr1NGdTGNd/nZsAYqh64QCrzCYCHq49V5CABiBAR1bvwhvtCWG zlIUL84SNVzJFd9lsUjR1jPLqMQ9MlA= X-Proofpoint-ORIG-GUID: Ka0vRNNNnKOVRu8hVW6l7gCCJgHRmhCc X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAyMDEzNSBTYWx0ZWRfXzISEm4tYuI6O rFXG2sSc4DLnVNS9tsqLHmwQnT7ynmvrfgiUprjktn9O92Jwpj6g4HNN86CE0aeyVsGRG6yBOGZ meiCkZii5Mhkp5q1rIOXRgRJUBX0uNWkE0lxZg+yLy4wjfaySeYY9ynL9i6fwAg4f6Yg+oZc0Zz u/rvIoIiiygasiYHJLKlggB2JlOi/F3DcNPVTyB+n5+F/N6ScjW6A4iXreOT/3UTqIVYXsWxtEd 1fUwIqnF6+m7GMOXkdLOZqO5Oh0aGbL5KfXZzTIjNrajbOXgb3GUGEui2KBPbybrzpQ0LRNb3cx QekDYYSM2VLFhQ7H0p5wW0miv8AWcT539BWH/E4hPErirkgcdDcVGD30nd7t0W1z24T4EbHUV1r z7GbN4UA1Gr+t4GoHTQ1f4P6sXrqK6VeKY8sK9YHylmxXkqhMnPEWa9SjUSvxLFNxgimv8Ycgji BGQrw5y+2HBmo9ddCOQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-02_03,2026-09-01_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 phishscore=0 clxscore=1015 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609020135 On 8/28/26 10:43 AM, Krishna Chaitanya Chundru wrote: > Nord requires a workaround to address a timing convergence issue in the > PCIe power domain. To avoid the issue, set the CORE_CLK_CGC_DIS and > AUX_PWR_DET bits in PARF_SYS_CTRL after controller initialization. > > The SLV_ACLK_CGC_DIS bit is already configured by hardware reset. This > change adds the remaining required settings as documented in > QCTDD11972446. > > Signed-off-by: Krishna Chaitanya Chundru > --- Reviewed-by: Konrad Dybcio Konrad