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Mon, 28 Jul 2025 08:54:18 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHeXZoAQdjpuChoZyAmT/dag8H3KC5MYBa1b5X4wsMiQZTkrmyQfj2y+wxmkWhpDYeZZkkpmg== X-Received: by 2002:a17:90b:134e:b0:311:9c9a:58ca with SMTP id 98e67ed59e1d1-31e7788a6aemr18357625a91.8.1753718057573; Mon, 28 Jul 2025 08:54:17 -0700 (PDT) Received: from [192.168.29.115] ([49.43.229.94]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-31e835ad1b1sm6119694a91.41.2025.07.28.08.54.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Jul 2025 08:54:17 -0700 (PDT) Message-ID: <1926e6e0-70a4-67fa-5e91-cd0155af1eac@oss.qualcomm.com> Date: Mon, 28 Jul 2025 21:24:06 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.5.1 Subject: Re: [PATCH v13 07/10] firmware: psci: Implement vendor-specific resets as reboot-mode Content-Language: en-US To: Krzysztof Kozlowski , Dmitry Baryshkov Cc: Bartosz Golaszewski , Bjorn Andersson , Sebastian Reichel , Rob Herring , Sudeep Holla , Souvik Chakravarty , Krzysztof Kozlowski , Conor Dooley , Andy Yan , Mark Rutland , Lorenzo Pieralisi , Arnd Bergmann , Konrad Dybcio , cros-qcom-dts-watchers@chromium.org, Vinod Koul , Catalin Marinas , Will Deacon , Florian Fainelli , Mukesh Ojha , Stephen Boyd , Andre Draszik , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, Elliot Berman , Srinivas Kandagatla References: <20250727-arm-psci-system_reset2-vendor-reboots-v13-0-6b8d23315898@oss.qualcomm.com> <20250727-arm-psci-system_reset2-vendor-reboots-v13-7-6b8d23315898@oss.qualcomm.com> <3gtlf5txxtioa5bvo6o467jupyoam4hjhm2mdiw5izv5vbl3tz@drndgp3tcrgo> <5e2caeb7-360a-4590-a36f-ff1ec4c20d31@oss.qualcomm.com> <2a39c0ab-edd4-402c-95a0-a6286f03102a@kernel.org> From: Shivendra Pratap In-Reply-To: <2a39c0ab-edd4-402c-95a0-a6286f03102a@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzI4MDExNSBTYWx0ZWRfX6BiE1CuvxGZR uzm4zqMgZ+5tScS4C3LM4pUu+XK7SLKVohbGd4R23lFcPWnOmE0tB72YJNP/WldFL4YEnH3Uk+Q MYrVO9UYCFxp+AnANIX8EeXHpd0/no54b2TBO6umvaIyWdbx6y9FPlhvwrIqlMs/iOL4yQMvTQ0 R8bXmgr/b6wRso3ELnOjmD+sBbobb/FcF0jQX73Kkuht4rFuU+yh1To89k9ijU7CdeSKm8u65Wv EB66gBi9zl94aA4CTf0QsCkDhn3C11LjPi/PCD+aPPxDgPC8novmwJk9eU/h/rwEP7mYtqw4LVg 762uuo2Prn419IHl8QA+J5oRaH3GFPBMoSMIK0YLwH0xYm5fL+ZI1lZ4WW7eDbQJpWH8jGFBwzI Qd8EEcOL/V/AKt4PzkwCiaknJ5v7q0i7oQGgcOuU+xvU2i2cTL9hZ6hnAFgYnCFcm+MyS/ed X-Proofpoint-ORIG-GUID: jiZlLCw3U8FWLc0FxfdS-QbYizDPKmSN X-Authority-Analysis: v=2.4 cv=ea89f6EH c=1 sm=1 tr=0 ts=68879d2b cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=sFC1+cT0Mn4vjRNJ/HRkpQ==:17 a=IkcTkHD0fZMA:10 a=Wb1JkmetP80A:10 a=hszVpQ_PDtPmkvUSercA:9 a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-GUID: jiZlLCw3U8FWLc0FxfdS-QbYizDPKmSN 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=2025-07-28_03,2025-07-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 suspectscore=0 bulkscore=0 adultscore=0 clxscore=1015 spamscore=0 mlxlogscore=809 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507280115 On 7/28/2025 5:53 PM, Krzysztof Kozlowski wrote: > On 28/07/2025 14:03, Dmitry Baryshkov wrote: >>> >>>> and the reboot-mode is defined in the >>>> previous patch. So, I'd assume, the path is defined. >>> >>> As I said, path is not. only psci/reboot-mode is. >> >> Do we have an _actual_ use case where PSCI node is not at at root node? > > Yes, many cases, because it belongs as well to firmware node. > >> If not, it's obviously a deficiency of the schema. Could you please >> provide suggestions on how to describe that in DT schema? > > I do not see deficiency. There is no ABI that psci must be root node, so > there is no issue to fix there. > > If you want to add such ABI, I will answer: no, don't, because we do not > want paths or node names to be the ABI. > > Compatible is the ABI. Will define a compatible for psci->reboot-mode node and use it to find the node. Hope its fine to define a compatible for reboot-mode which is defined as a property inside psci? thanks. > > Best regards, > Krzysztof