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Mon, 14 Sep 2026 22:23:10 -0700 (PDT) Received: from [10.218.35.45] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-33ba4cf015csm33549798eec.4.2026.09.14.22.23.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 14 Sep 2026 22:23:10 -0700 (PDT) Message-ID: <3e28ec09-4378-4cd7-b786-ddee520db5eb@oss.qualcomm.com> Date: Tue, 15 Sep 2026 10:53:03 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/5] dt-bindings: phy: qcom: add Nord QMP PCIe PHY binding To: Krzysztof Kozlowski Cc: 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 , 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, shengchao.guo@oss.qualcomm.com References: <20260909-nord-v3-0-b0a82721c547@oss.qualcomm.com> <20260909-nord-v3-1-b0a82721c547@oss.qualcomm.com> <20260910-neat-goat-of-prosperity-eeecaf@quoll> Content-Language: en-US From: Krishna Chaitanya Chundru In-Reply-To: <20260910-neat-goat-of-prosperity-eeecaf@quoll> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: Dsa2lwZt2vSneYKPU0xr0kVTGdklOtPB X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE1MDA3NCBTYWx0ZWRfX9W7+iCsdM58j dK82hsY3Hu6j3RqVnXCxWUG9xOihI80RAv9rRZbmyJvbOBk4V+5y/TPpbNXdRAmRSUxIE5lRJCq qLJlV+sCVsNoNeKW9qyBURTviJ8JS9BpwpE1ygKbOJC7xkwpjnpFCBLHI2ogkuzWY0ZX4Lgg5Vj Ga7p6bDAfXTlj/foXwbxsI4mLrQ8bfkArUGgfzchegBux3Fe5/fK8hdAJUkflOcAlDmZo3nYNrI dEdBRrXxtFhUtFTczNCQwbGQd8X2UV6scFOv96yxaRX2lLIbcYNcCkHqIH/Ot70BG/zvKAr+jfO kQuB18InLIgK/rguxJVtgA0yiXe/DrpEbatxtYokwStdyM4VjW6gsaLVE/1B1y0XauY1LtffsgF iNsG1Srk5kwnb4mllh1wM2EOPS4BDJ98Cn7S2Pgi2qF84FQU1r28dTkwIo9u1KEVad0T/LlxYkc dLqglrb4vop6X6vfJZQ== X-Proofpoint-GUID: Dsa2lwZt2vSneYKPU0xr0kVTGdklOtPB X-Authority-Analysis: v=2.4 cv=M7TYuCws c=1 sm=1 tr=0 ts=6aa8d640 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=bnyAZr9--xUIB8vRdWUA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE1MDA3NCBTYWx0ZWRfX2y3kbCZkPfbG 6xsOAzk4mTj4BS30egqayux8PsZgcphNmSXZhEgjiWrNIl/K5FzApujMRpJrXcv082eijwDhVpH NUPWyfJLM6GqGLHk0Q2z5R0AovG2p6o= 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=2026-09-15_01,2026-09-14_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1015 bulkscore=0 impostorscore=0 suspectscore=0 malwarescore=0 adultscore=0 lowpriorityscore=0 spamscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609150074 On 9/10/2026 3:33 PM, Krzysztof Kozlowski wrote: > On Wed, Sep 09, 2026 at 05:18:16PM +0530, Krishna Chaitanya Chundru wrote: >> + vdda-phy-a-supply: true >> + >> + vdda-phy-b-supply: true >> + >> + vdda-phy-c-supply: true >> + >> + vdda-phy-d-supply: true >> + >> + vdda-pll-a-supply: true >> + >> + vdda-pll-b-supply: true >> + >> + vdda-pll-c-supply: true >> + >> + vdda-pll-d-supply: true >> + >> + qcom,link-mode: >> + description: | >> + Reference to the TCSR syscon and the offset of the >> + TCSR_PCIE_LINK_CONFIG_MODE register. >> + 0 (QMP_PCIE_NORD_MODE_X16) — all ports ganged as x16 >> + 1 (QMP_PCIE_NORD_MODE_X8_X8) — x8 (port A) + x8 (port B+C+D) >> + 2 (QMP_PCIE_NORD_MODE_X8_X4_X4) — x8 (A) + x4 (B) + x4 (C+D) >> + 3 (QMP_PCIE_NORD_MODE_X8_X4_X2_X2)— x8 (A) + x4 (B) + x2 (C) + x2 (D) > What does this mean? The phy working mode is defined by phy-cells > argument, so what are these numbers above? I wasn't clear on the description of phy-cells properly, we need phy-cells to be 1, so that controller nodes can reference phy with index indicating which port of phy being used. I will update the description in next series. The TCSR register is the real value programmed by TZ to tell which mode we are currently operating. - Krishna Chaitanya. > > Best regards, > Krzysztof >