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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b972e185269sm53994166b.50.2026.03.11.06.41.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Mar 2026 06:41:30 -0700 (PDT) Message-ID: Date: Wed, 11 Mar 2026 14:41:27 +0100 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 2/3] arm64: dts: qcom: Introduce sa8255p SoC To: Deepti Jaggi , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prasad Sodagudi , Nikunj Kela , Shazad Hussain References: <20260304-b4-scmi-upstream-v5-0-f8fc763d8da0@oss.qualcomm.com> <20260304-b4-scmi-upstream-v5-2-f8fc763d8da0@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260304-b4-scmi-upstream-v5-2-f8fc763d8da0@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: VliCZan3QcerdS15U0ZzwnrOfmzxpfck X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzExMDExNSBTYWx0ZWRfX5eka2PfVlpTo eY+ByE5I7d4bbYRKVg6u+uxJr6PdXCUF1BDK7RLvkKW8mVBq8H90REbSwt2keWJ/XUScvNfhj/y gV69udBBm+SqFtxF1GdVqtUMlXdiv0RiGq6cHYEyZ2AqOJWUavH/ZCBehHNKATbGR07SPyxHMJD iNMmGrHQs77H1noxDZuqdJRf9j0ihlHLofkEAjgtU2rKN0amRr5WUbNDSXtLmzxeCYUDdBipxWr yx42MRYWSO7UNGHjaBUE3EY0QrCs/7yPPdlYxv7cJxvinN25qvLfl06QuQeXr6x/WoVsL4ggNsz 5HFKO5DKpINwPZ3Xw3cLZEGp9rr/hu8U4QSj/A7ppGVMiYXrJPFSJKwxUfaqXGzm+So4zQ1M6Hk YX8No9A0uVjC2hMOj+Guaft8ZOs6gYd1EVBlIbx+S3/Ai7dWQHHp8tZt37WXR2OyPOse44500BS uFdHKX4nOnsU+VdeGBg== X-Authority-Analysis: v=2.4 cv=FMMWBuos c=1 sm=1 tr=0 ts=69b1710c cx=c_pps a=UgVkIMxJMSkC9lv97toC5g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=KKAkSRfTAAAA:8 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=COk6AnOGAAAA:8 a=TRUxsesqeu6M_UsrYMsA:9 a=QEXdDO2ut3YA:10 a=1HOtulTD9v-eNWfpl4qZ:22 a=cvBusfyB2V15izCimMoJ:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-ORIG-GUID: VliCZan3QcerdS15U0ZzwnrOfmzxpfck 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=2026-03-11_01,2026-03-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 bulkscore=0 adultscore=0 clxscore=1015 impostorscore=0 suspectscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603110115 On 3/5/26 5:28 AM, Deepti Jaggi wrote: > From: Nikunj Kela > > Introduce base device tree support for sa8255p Qualcomm's automotive > infotainment SoC. The base dt file describes core SoC components- CPUs, > CPU map, ipcc, QUP, geni UART, interrupt controller, TLMM, reserved > memory, SMMU, firmware scm, scmi, watchdog, SRAM, PSCI, ufs, pcie, pmu > nodes and enable booting to shell with ramdisk. > > The Qualcomm automotive sa8255p SoC utilizes firmware to configure > platform resources such as clocks, interconnects, and TLMM. Device drivers > request these resources through the SCMI power,reset and performance > protocols. Assign each device driver a dedicated SCMI channel and Tx/Rx > doorbells to support parallel resource requests and aggregation in the > SCMI platform server. Operate the SCMI server stack in an SMP-enabled VM, > using the Qualcomm SMC/HVC transport driver for communication. > > Group resource operations to improve abstraction and reduce the number of > SCMI requests. Follow the SCMI-based resource management approach > demonstrated by Qualcomm at LinaroConnect 2024.[1] > > Limit initial support to basic platform resources, serial console, ufs > and pcie.Defer enabling USB, and Ethernet to subsequent updates. > > [1]: https://resources.linaro.org/en/resource/wfnfEwBhRjLV1PEAJoDDte > > Co-developed-by: Shazad Hussain > Signed-off-by: Shazad Hussain > Signed-off-by: Nikunj Kela > Co-developed-by: Deepti Jaggi > Signed-off-by: Deepti Jaggi > --- [...] > + tsens2: thermal-sensor@c251000 { > + compatible = "qcom,sa8255p-tsens", "qcom,tsens-v2"; > + reg = <0x0 0x0c251000 0x0 0x1ff>, > + <0x0 0x0c224000 0x0 0x8>; All TSENS regions are 0x1000-long [...] > + tlmm: pinctrl@f000000 { > + compatible = "qcom,sa8255p-tlmm", "qcom,sa8775p-tlmm"; > + reg = <0x0 0x0f000000 0x0 0x1000000>; > + interrupts = ; > + gpio-controller; > + #gpio-cells = <2>; > + interrupt-controller; > + #interrupt-cells = <2>; > + gpio-ranges = <&tlmm 0 0 149>; > + wakeup-parent = <&pdc>; > + }; Praveen suggested GPIOs are not controlled by Linux: https://lore.kernel.org/linux-arm-msm/12063990-70fe-4faf-89fa-c74c7bd97f42@oss.qualcomm.com/ Could you comment on this? [...] > + aoss-0-thermal { > + thermal-sensors = <&tsens0 0>; Is Linux going to act on any of these thermal trips? Konrad