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Tue, 29 Jul 2025 09:39:09 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA04.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 56T9d8VR026385 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Jul 2025 09:39:08 GMT Received: from [10.231.195.155] (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Tue, 29 Jul 2025 02:39:05 -0700 Message-ID: Date: Tue, 29 Jul 2025 17:39:02 +0800 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 4/4] arm64: dts: qcom: Add base HAMOA-IOT-EVK board To: Konrad Dybcio , Yijie Yang , Bjorn Andersson , "Konrad Dybcio" , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley CC: , , , Shuai Zhang , , References: <20250729-hamoa_initial-v3-0-806e092789dc@oss.qualcomm.com> <20250729-hamoa_initial-v3-4-806e092789dc@oss.qualcomm.com> From: Yingying Tang In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 28bjND0JqCliO6bpHeGX9Tf2UaegbSXP X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzI5MDA3NSBTYWx0ZWRfXwoqglyeIiM9W fSIpnMIhB4UDMkjcL+TttddROmSQ75RyyxDuB21ulIkf81pVAqulxFTj3CtPXXy3VkFtqv0J3zC 2fwTAS0/avzQmvIzCD1hRiWThSeUnI/4oYoK/vMWWFegl344RK+6DFpn1HnTBPZkj6I7KJdUZnw efwdGKBaOOrjRtC+HH+FbaSrouthBpE433gM9Z+rSvAdwA6Dmtp4YRe1oawDf5X3nryD7MW1S/5 2dN0hCfeCHcguJs0XvjB3xiUPe3WHEM3bA9Po/hHr5xOb5MPvT7sfA6elSMh3FkcoDdqs0/tie2 VfwriyhuyUGVzNvrF/fw+RlaYW7SF7lKXFBYzLbbqx2m1n9Q2ri1p/IXqwCn8cNfOimGQ7XQPwm v3bIEKy1Tk17DuqtqJB6yErnPGc2hHRo/Dxl9nmgj2yt/RzL5pR2InS9Q18zqVoRufYqADkX X-Authority-Analysis: v=2.4 cv=HfYUTjE8 c=1 sm=1 tr=0 ts=688896bd cx=c_pps a=JYp8KDb2vCoCEuGobkYCKw==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=GEpy-HfZoHoA:10 a=IkcTkHD0fZMA:10 a=Wb1JkmetP80A:10 a=EUspDBNiAAAA:8 a=1utyrP9q1XeMewFY-dYA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: 28bjND0JqCliO6bpHeGX9Tf2UaegbSXP 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=2025-07-29_02,2025-07-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 clxscore=1011 bulkscore=0 suspectscore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 mlxlogscore=993 phishscore=0 priorityscore=1501 malwarescore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507290075 On 7/29/2025 4:37 PM, Konrad Dybcio wrote: > On 7/29/25 7:51 AM, Yijie Yang wrote: >> >> >> On 2025-07-29 09:32, Yijie Yang wrote: >>> The HAMOA-IOT-EVK is an evaluation platform for IoT products, composed of >>> the Hamoa IoT SoM and a carrier board. Together, they form a complete >>> embedded system capable of booting to UART. >>> >>> This change enables and overlays the following peripherals on the carrier >>> board: >>> - UART >>> - On-board regulators >>> - USB Type-C mux >>> - Pinctrl >>> - Embedded USB (EUSB) repeaters >>> - NVMe >>> - pmic-glink >>> - USB DisplayPorts >>> >>> Written with contributions from Shuai Zhang (added Bluetooth) and Yongxing >>> Mou (added USB DisplayPorts). >>> >>> Signed-off-by: Yijie Yang >>> --- > > [...]>> + vreg_wcn_3p3: regulator-wcn-3p3 { >>> + compatible = "regulator-fixed"; >>> + >>> + regulator-name = "VREG_WCN_3P3"; >>> + regulator-min-microvolt = <3300000>; >>> + regulator-max-microvolt = <3300000>; >>> + >>> + gpio = <&tlmm 214 GPIO_ACTIVE_HIGH>; >>> + enable-active-high; >>> + >>> + pinctrl-0 = <&wcn_sw_en>; >>> + pinctrl-names = "default"; >>> + >>> + regulator-boot-on; >> >> It should be set to 'regulator-always-on'. > > Are you sure? Turning off Wi-Fi sounds like a valid usecase.. Hi Konard, It is m.2 interface on Hamoa. The PCIe power of m.2 should be always on. Even on QCOM's B2B interface, we are unable to dynamically control the power of PCIe devices on upstream kernel. The PCIe specification does not support dynamic power control between the PCIe device and the RC. PCIe power should be always on here. > > Konrad