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Thu, 02 Jul 2026 03:55:54 -0700 (PDT) X-Received: by 2002:a05:622a:14d1:b0:51c:223:3c57 with SMTP id d75a77b69052e-51c26b41df6mr43962511cf.10.1782989753769; Thu, 02 Jul 2026 03:55:53 -0700 (PDT) Received: from [192.168.120.170] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-698ad118f43sm788110a12.25.2026.07.02.03.55.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Jul 2026 03:55:52 -0700 (PDT) Message-ID: <9c1aab59-14b2-4811-b778-8e96645bd65b@oss.qualcomm.com> Date: Thu, 2 Jul 2026 12:55:49 +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 v5 11/11] arm64: dts: qcom: shikra: Add gpio-reserved-ranges to tlmm To: Komal Bajaj , Vinod Koul , Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krzysztof Kozlowski , Georgi Djakov , Bjorn Andersson , Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Anurag Pateriya References: <20260702-shikra-dt-m1-v5-0-f911ac92720c@oss.qualcomm.com> <20260702-shikra-dt-m1-v5-11-f911ac92720c@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260702-shikra-dt-m1-v5-11-f911ac92720c@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: s94zC4iVjcY1-1Yij3smhk-wa8OZy_nX X-Authority-Analysis: v=2.4 cv=a4kAM0SF c=1 sm=1 tr=0 ts=6a4643ba cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=t9bxL2sBmI2IUrh-d9IA:9 a=QEXdDO2ut3YA:10 a=ZXulRonScM0A:10 a=zZCYzV9kfG8A:10 a=dawVfQjAaf238kedN5IG:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzAyMDExMyBTYWx0ZWRfX5Izmq++C3ck+ xbF6uE5QAqDHFMNTitwSF2hLPxWiwsfV1pnHzIFCo8NNIIZ9D08tYwRRhhQ4ELlSZ5k0KHc5Key KuNf6yXdnrjSmtKinwRF+sEGa7NOeCN59wloxcxk4lXKTDgi/8BD2yJO3ahtV1qe/Im16PX226m jvVEw6R0RnXWDy/QWCRggQ9BFL5L3XpphTSyjdi4eneMmfAK3ZoGyohfU7x5GZzdJL6Ritnqr0w Oh7QyJxx5xOCeSYKb2pS8JwHajf+X5a+bUwonSi3wwP7/vwMJ0jL+I/nfJG+lgTYKlHsYON9fO/ tbnxGR+oplayr7h7ozIJcrF9lfuHv1ALe32bISQR9AsnpGpDszXNKH1PglqCikkLrw+7djOhpFp NaRH5xZPTvW2JSdJHjF/uhi0Ce5pTC8ViHaXEAyyOJZqDDqyRWe/NJXV6K9uPnyArJZkTKG5duT EaBiznZzpW0s0YVQDPw== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzAyMDExMyBTYWx0ZWRfX0pQP4dbUAjcm ABKJ2guAM48JjEdYBFZ/veOl2FprHhTFAdWF0+1isJR9kAWgoTLF2uAZG79l9ltQxfj5oiL+iVS s4H1TO3uWsOdlb08eXeBVGaW3c3bD+c= X-Proofpoint-GUID: s94zC4iVjcY1-1Yij3smhk-wa8OZy_nX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-07-02_01,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1015 impostorscore=0 malwarescore=0 adultscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 spamscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607020113 On 7/2/26 11:50 AM, Komal Bajaj wrote: > Add gpio-reserved-ranges property to the tlmm node for all three > Shikra EVK variants (CQM, CQS, IQS) to mark GPIOs used by the > SoC internally and not available for general use. These are generally added to prevent non-secure access upon TLMM probe, i.e. the board won't boot if some of them are not protected. I assume the proposed set contains both ones that are _absolutely forbidden_ for Linux to touch, but also ones that are dedicated to some specific purpose that Linux _shouldn't_ touch. Please add comments, like in glymur-crd.dtsi: gpio-reserved-ranges = <4 4>, /* EC TZ Secure I3C */ <10 2>, /* OOB UART */ <44 4>; /* Security SPI (TPM) */ explaining what these pins are. If any of them are boot-critical, squash this into the introductory change Konrad