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Thu, 03 Sep 2026 02:37:14 -0700 (PDT) X-Received: by 2002:a05:620a:489c:b0:939:6c63:a7da with SMTP id af79cd13be357-9396c63c202mr504115385a.0.1788428233634; Thu, 03 Sep 2026 02:37:13 -0700 (PDT) Received: from [192.168.202.12] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c25f424528esm72013266b.59.2026.09.03.02.37.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Sep 2026 02:37:12 -0700 (PDT) Message-ID: Date: Thu, 3 Sep 2026 11:37:09 +0200 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 v2 01/16] arm64: dts: qcom: x1-crd: Mark the EC reset gpio as reserved To: Abel Vesa Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rajendra Nayak , Abel Vesa , Sibi Sankar , Marc Zyngier , Aleksandrs Vinarskis , Konstantin Shabanov , Srinivas Kandagatla , Ettore Chimenti , Georg Gottleuber , Xilin Wu , Bryan O'Donoghue , Val Packett , Laurentiu Tudor , Jens Glathe , Dale Whinham , =?UTF-8?Q?J=C3=A9r=C3=B4me_de_Bretagne?= , Harrison Vanderbyl , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio References: <20260901-dts-qcom-hamoa-reserve-ec-reset-gpio-v2-0-f4ab7e4bb75d@oss.qualcomm.com> <20260901-dts-qcom-hamoa-reserve-ec-reset-gpio-v2-1-f4ab7e4bb75d@oss.qualcomm.com> <3f26bf2d-19de-4cc3-8af2-c26601da2576@oss.qualcomm.com> <182336df-b505-4ae4-901f-e09c0eae80ed@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: IKW7sNZjFaerXaRdHXsDQZDF-36ySG02 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAzMDA4MyBTYWx0ZWRfX2vTanK78L8Xc rp4OnC4qbKBATSIdYcuYNrMVARbxT10i2VkkAN8OUKMwEwChtgCbaj18rMcSPEq7VEYnrdy2gcE lbTT49CchvAaJq6cuRms3mbowoDGMWKPVcKdcS413fZH8qRw/0asBPX76u8pZjvppv4WGYImAVF qWr+mUorEm0SKb7Ucz0aNaxZAxPhLyYgXnqAqHS2wr7jsUdTnawbRD2VCYnUK6k+pMrICboRObc D+oVx+dVeztEfTVTMjz6UZLALXVk9TGissWyXFgDkO6KmhYRH7Wvi0jACUxU+2FB2IuMYAj5Cbe 2IYPWULPDKVxrqW8ebXHTZhookZMGsc3m6/JAYbgQ5/klHKnkD1Q79n2pIGpD1O077tA724VuAQ PxOxyieVLuK+TK2ySjq/ik+QiZpoqahh67SMtzJe/Ldil3hI+iKVWCw3Dm+zHh3zwfyBGBqFiNc b9zKQPlOJ4W0XhhwW0w== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAzMDA4MyBTYWx0ZWRfXyMFBFXgq/Wpy tkeVMTMPQPYNQvINMmYbQjTP3F36yrgVQO3ubjDlEvDMhTql5/9zpghjmru+xkhzT2tpmlkgM/0 CX6ioQTiEKO4WhbdU2jmAtrUxtniaDA= X-Authority-Analysis: v=2.4 cv=ErHiaycA c=1 sm=1 tr=0 ts=6a993fca cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=Ox6tuOH3-mkVs-antacA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-ORIG-GUID: IKW7sNZjFaerXaRdHXsDQZDF-36ySG02 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=2026-09-03_02,2026-09-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 bulkscore=0 adultscore=0 malwarescore=0 spamscore=0 impostorscore=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609030083 On 9/3/26 11:29 AM, Abel Vesa wrote: > On 26-09-03 11:16:20, Konrad Dybcio wrote: >> On 9/3/26 10:34 AM, Abel Vesa wrote: >>> On 26-09-02 17:53:23, Konrad Dybcio wrote: >>>> On 9/1/26 10:06 AM, Abel Vesa wrote: >>>>> GPIO 65 from TLMM is used by the embedded controller as its reset line. >>>>> >>>>> On some devices, toggling the embedded controller reset line makes the >>>>> device not power up at all, unless the battery is unplugged. >>>> >>>> Have you confirmed that behavior on the CRD? >>> >>> Toggling it does nothing observable. >>> >>> However, the documentation says this GPIO is actually tied to EC reset. >>> >>> I still think we should reserve it, just to be safe. >>> >>> What do you think? >> >> I believe that contradicts the reasoning you gave in the commit >> message then.. > > Yep, will rephrase it for this platform as: > > While toggling it from linux doesn't seem to have any observable impact, > since documentation does confrm it is connected to EC reset, lets reserve > it just to be on the safe side. Have you toggled the pin into the correct polarity? The EC FW seems not to be handling that pin at all, so I'm guessing it should be just a dumb chip reset Konrad