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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b98335de177sm773644666b.29.2026.03.25.04.20.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Mar 2026 04:20:47 -0700 (PDT) Message-ID: Date: Wed, 25 Mar 2026 12:20:45 +0100 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] arm64: dts: qcom: sdm845-shift-axolotl: Enable NFC To: David Heidelberg , Konrad Dybcio , Alexander Martinz Cc: Petr Hodina , biemster , netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, Rob Herring , oe-linux-nfc@lists.linux.dev, Krzysztof Kozlowski , devicetree@vger.kernel.org, Conor Dooley , linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, Bjorn Andersson References: <20260324-oneplus-nfc-v2-0-3eef052c9bc6@ixit.cz> <20260324-oneplus-nfc-v2-2-3eef052c9bc6@ixit.cz> <9d9ec994-c954-445d-97b2-772614d66f35@oss.qualcomm.com> <041766dd-422e-40e1-9e5d-c220580871f5@ixit.cz> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <041766dd-422e-40e1-9e5d-c220580871f5@ixit.cz> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI1MDA4MCBTYWx0ZWRfX+lLkUpIvvI90 yWPBH5ySHpt75n5EMkph5h21aXBppNSfedGKfLUvJl4Wpzhwkd7b5nNMdMwXDrjvBysxUalcb+O HL+pj2Cjg7BdOvknAKSakenjqSPeyenVWEEEsh0P/eXcj9cKn6U4ZK2N5Eufl5xdm9I+ql0+Zl+ VqnnKHPrwZFies+JuHdyQu3GE6vy4UEz7QqVGK50wtdqK0UeqltxxZxI0jrl7MEx1+994lahtC5 EogVvtLSzHusQW654wuKc9v733cNJaRJ1VpMGQZMLEpq6GFq6PvXHePgWPXkL3yKaYAQn+W/JOe 5ZRouQbG3zXxxeB2OnPsJZborTatJOMtB7gs8Xo9ZI3I92ttieVEpVcWcE6sik1aFvGsBLOZy2C Zq9+0/dfu2owTR66ioAzbJj5VGXaZ2rIk2pvqB+MsLAP7udh822e/7WyvtkLxabWRzQzVdwALeB mFrtqEFhEqINgjC7WxA== X-Proofpoint-GUID: QT1sqyrgY9moJe1glOY5Fpn4epkuVK8_ X-Authority-Analysis: v=2.4 cv=Fo0IPmrq c=1 sm=1 tr=0 ts=69c3c513 cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=uWvuUna9Uad_Tg1iXS4A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=dawVfQjAaf238kedN5IG:22 X-Proofpoint-ORIG-GUID: QT1sqyrgY9moJe1glOY5Fpn4epkuVK8_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-25_03,2026-03-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 malwarescore=0 clxscore=1015 spamscore=0 bulkscore=0 phishscore=0 priorityscore=1501 suspectscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603250080 On 3/24/26 7:08 PM, David Heidelberg wrote: > > > On 24/03/2026 14:12, Konrad Dybcio wrote: >> On 3/24/26 12:20 AM, David Heidelberg via B4 Relay wrote: >>> From: David Heidelberg >>> >>> Definition of the NFC. >> >> "meh" commit message >> >> [...] >> >>> +    nfc_enable_default: nfc-enable-default-state { >>> +        pins = "gpio12", "gpio62"; >>> +        function = "gpio"; >>> +        drive-strength = <2>; >>> +        bias-pull-up; >> >> Are you sure about pulling up an active-high pin? > > I'm not sure, but downstream does it (and "works for me"). Maybe Alexander would know more details here. Would changing it to bias-disable also "work for you"? > > David > >> >> FWIW TLMM subnodes are best sorted by pin index (although the file >> currently doesn't really do that) as per dts coding style > > I assume when I group the -pins into -state it doesn't apply anymore? As I don't feel having pins relevant to one device / subsystem all over the place is extra clean. Krzysztof? Konrad