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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af47f44d758sm240579766b.76.2025.07.25.02.39.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Jul 2025 02:39:59 -0700 (PDT) Message-ID: Date: Fri, 25 Jul 2025 11:39:56 +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 4/4] arm64: dts: qcom: Add base HAMOA-IOT-EVK board To: Yijie Yang , Krzysztof Kozlowski , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250724-hamoa_initial-v2-0-91b00c882d11@oss.qualcomm.com> <20250724-hamoa_initial-v2-4-91b00c882d11@oss.qualcomm.com> <3f03b1c0-94a2-4081-adb0-aac4f42ee430@kernel.org> <20829683-b2ce-4aaa-beb4-4ca5774350a2@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20829683-b2ce-4aaa-beb4-4ca5774350a2@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=NfTm13D4 c=1 sm=1 tr=0 ts=688350f1 cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Wb1JkmetP80A:10 a=3OGU9N5RSJw_tsRa1MMA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=dawVfQjAaf238kedN5IG:22 X-Proofpoint-ORIG-GUID: Yl469E72i36dluYpiRv6a-bpgRYsWpxc X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzI1MDA4MSBTYWx0ZWRfX9j4hg15W6DF5 Z+x1JzHHcKHTlp+z8iDYGOhfVFMu64R7gwV4gBED0y74If2MbjE/lgQh7xT1VipJ4LEoXSQPsld vobSEzn3SIt3eskO+UCVgFanGDFn4leqgSxCDlipye9Xau5MjccpbGm+zB6ljk9LDlmy5RoR09e 9e3MKP60UyW4z1mp8hTPCy0Tgmr7argumNrlKUNRb1LkK3F7mPwfY09Xj5qLEXlDpjdaFv1ZHnn WRq+xGbTJNupvq8BOvB8q1qhF2e7Gz0U4boANhgZRuW3KHoHlcIFWnWFtCA2UbqgO3aAe+jPUnA xb/B1OxZ1YadYJfTKLFyz25ySmaGvK0lgrKtgtaqh1zF4QBsVtH7bH1jrn9ryE1PR1AntAnzgo0 l9gjXRCu2cQvh/iCi3mycHOfIBkx9c1VgWYthXwOba0wSBDFg8izjd9za7kGPW6YwtkR/U4f X-Proofpoint-GUID: Yl469E72i36dluYpiRv6a-bpgRYsWpxc 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=2025-07-25_02,2025-07-24_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 clxscore=1015 suspectscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 priorityscore=1501 phishscore=0 mlxscore=0 mlxlogscore=999 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-2507250081 On 7/25/25 11:36 AM, Yijie Yang wrote: > > > On 2025-07-25 17:18, Krzysztof Kozlowski wrote: >> On 25/07/2025 11:01, Yijie Yang wrote: >>> >>> wcn7850_pmu: wcn7850-pmu@xxxx { >>>       compatible = "qcom,wcn7850-pmu"; >>>       reg = <0x...>; >>>       vdd-supply = <&dummy_reg>; >>>       vddaon-supply = <&dummy_reg>; >>>       vdddig-supply = <&dummy_reg>; >>>       vddrfa1p2-supply = <&dummy_reg>; >>>       vddrfa1p8-supply = <&dummy_reg>; >>> }; >>> This approach ensures the DTB passes schema checks while keeping the >>> implementation clean and consistent with the actual platform setup. Do >>> you think this is appropriate? >> >> No. There is no dummy regulator in the hardware, so you cannot add it to >> the DTS. > > What should I do in this case? Is it acceptable to deviate from the dt-binding rules due to differences in firmware behavior? Otherwise, I’ll need to revert to the first version, leave a TODO in the DTS, and wait for someone to properly model the M.2 card. The reason we describe the regulators is so that the Wi-Fi can be powered off and back on. Please don't invent any hacks. Konrad