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Wed, 02 Sep 2026 08:54:21 -0700 (PDT) X-Received: by 2002:a05:620a:640f:b0:939:17ec:8a81 with SMTP id af79cd13be357-93960f8a9afmr400614985a.3.1788364460903; Wed, 02 Sep 2026 08:54:20 -0700 (PDT) Received: from [192.168.202.12] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6a67f95f557sm1378949a12.31.2026.09.02.08.54.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Sep 2026 08:54:20 -0700 (PDT) Message-ID: <0ba34862-0268-428b-850a-a43f795c3065@oss.qualcomm.com> Date: Wed, 2 Sep 2026 17:54:17 +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 16/16] arm64: dts: qcom: x1p42100-microsoft-sp12in: Mark the EC reset gpio as reserved To: Abel Vesa , 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 Cc: 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-v2-16-f4ab7e4bb75d@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260901-dts-qcom-hamoa-reserve-ec-reset-gpio-v2-16-f4ab7e4bb75d@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: feQHAbColPn7p0LdOck043nYzpmN4spI X-Proofpoint-ORIG-GUID: feQHAbColPn7p0LdOck043nYzpmN4spI X-Authority-Analysis: v=2.4 cv=YKuvDxGx c=1 sm=1 tr=0 ts=6a9846ae cx=c_pps a=hnmNkyzTK/kJ09Xio7VxxA==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=Wad5cFZijfJPr_ZhbakA:9 a=QEXdDO2ut3YA:10 a=PEH46H7Ffwr30OY-TuGO:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAyMDE0MCBTYWx0ZWRfX4i1baJjbF7RY XSqXtAAcHEyvAlzeND+jUCcPmtl5+0LJ2dmVz3fI6g2LAXJVraxf6ClMQy3vlSPK9zElcEhm2uV hnzGqVMO3iPNcTtskVGQwWh1GJgMnKglASUO97B0Wde1hzg5XnfRubwgadF1nbjFlhnmWOaVTJO 9+1ka8KuveD9W+/n40fU4Kn5elWStfQVbRv4/ZffvA1nJ/gen5ONN0m/WD2IHunxSHyia8LnfOz cZaVPZ8dJUGO7IBiQCrK0+LGewq0kZYREWtZ1YHbea4zxsB4IGsTPa/T6bjyC9eEsz4sFY6Ho/O p/AlWholz2r7I0vSaXYPOjJjuGLeOJo+5eYwI/h17aRu333QxgqslgaAz3t1JGD9+ece1KUsKRP 4DN/oyj5Bb046Y5DgSQ2+tlVjhxT9cOxzD2Mh1hzzdk8PYhFrtRXM6qF109zn4b0fi2KklQ9t1C Sz+7OOcIvESRKCas/UQ== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAyMDE0MCBTYWx0ZWRfX420hhot252L8 QTMQrvtKE9YbCSvMkN0aWXHNmmFLEOUO9HS49b/F+xwFTrm02zLHcKrr9dZWSPFXm7R2mUH7tDB /6PoRBScLZZkE6M6UYrWqKQWraP03xs= 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=2026-09-02_04,2026-09-01_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 spamscore=0 adultscore=0 impostorscore=0 malwarescore=0 phishscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609020140 On 9/1/26 10:07 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. > > So reserve it in order to prevent Linux from requesting or > reconfiguring it. > > Fixes: 447f8053b184 ("arm64: dts: qcom: purwa: Add Microsoft Surface Pro 12in") > Signed-off-by: Abel Vesa > --- > arch/arm64/boot/dts/qcom/x1p42100-microsoft-sp12in.dts | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/qcom/x1p42100-microsoft-sp12in.dts b/arch/arm64/boot/dts/qcom/x1p42100-microsoft-sp12in.dts > index 0314b2246cdb..7f7245773e6d 100644 > --- a/arch/arm64/boot/dts/qcom/x1p42100-microsoft-sp12in.dts > +++ b/arch/arm64/boot/dts/qcom/x1p42100-microsoft-sp12in.dts > @@ -970,7 +970,8 @@ right_spkr: speaker@0,1 { > > &tlmm { > gpio-reserved-ranges = <34 2>, /* Unused */ > - <44 4>; /* SPI (TPM) */ > + <44 4>, /* SPI (TPM) */ > + <65 1>; /* EC reset */ Same comment as the other Surface Konrad