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Wed, 08 Jul 2026 20:19:09 -0700 (PDT) X-Received: by 2002:a05:6a20:6a06:b0:3bf:6acf:2940 with SMTP id adf61e73a8af0-3c0bcbe9525mr6421016637.11.1783567148864; Wed, 08 Jul 2026 20:19:08 -0700 (PDT) Received: from [192.168.50.84] ([76.176.60.246]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-13b6594f6a9sm26144876c88.5.2026.07.08.20.19.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 08 Jul 2026 20:19:08 -0700 (PDT) Message-ID: Date: Wed, 8 Jul 2026 20:19:06 -0700 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 v3 RESEND 3/5] arm64: dts: qcom: Add device tree for Nord SA8797P SoC To: Pavan Kondeti Cc: Shawn Guo , Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Konrad Dybcio , Dmitry Baryshkov , Bartosz Golaszewski , Harshal Dev , Herbert Xu , devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260526051300.1669201-1-shengchao.guo@oss.qualcomm.com> <20260526051300.1669201-4-shengchao.guo@oss.qualcomm.com> <46af10c8-8400-4131-ac87-b3f17350bb65@oss.qualcomm.com> Content-Language: en-US From: Deepti Jaggi In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA5MDAyOSBTYWx0ZWRfX8EcqAxaVszgK /l4k9fmpMyo3ch7M0Xtdtkie9jPC+vbzjYemBRr88U/JDtEYnmQpodLhoJySNUInO08Z1kok0Xe nbWuiSUi3CQmG69aA9+3kAT/JAjty4KYHNZ6vo+QKxqvD4PHUWb3nEWle5IgFZj1Rir1xFLZ+pY 43UbIpRBquKlzZgvxm7t4rTrAAWm8okY3zq3LVK6BN7wpVXMDJePfvbAOAIhtaB7ImXY+FCkrvO yKwG0QIcA2AQZjGYBUtMBLvcaZUXGWOuqsv/jsHseJv2UwhRwhryEPQdqtK0wDsMOAHCKjozhfs 57qrp8Kwq96I6fn/xnFFLx2RfO2pfwN4PC8LYc7gpvCY7tyMtIc9LweJ+CwJK/RWQqb1x7JkNSq VjRfvas3vhRWpPNYCu8ewGAdWi2RWJhIKLLW0x4zAzYPdXb56vy+xA5XGTmUp9MM0e19KsUn43J NdWVljyRe6E7/PMaK+A== X-Proofpoint-GUID: T6sZlsvK20NTSa677kWs-hrPLm2s8gvx X-Authority-Analysis: v=2.4 cv=TMp1jVla c=1 sm=1 tr=0 ts=6a4f132e cx=c_pps a=Oh5Dbbf/trHjhBongsHeRQ==:117 a=0ISbvMpsx/t7i6H15JfNAA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=ZcQJt_r4axFxopQkEsUA:9 a=QEXdDO2ut3YA:10 a=_Vgx9l1VpLgwpw_dHYaR:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA5MDAyOSBTYWx0ZWRfX2jWvrdOzszvX 9u8bCY7kY14AfH46NMDMTthmAIJd0wI+23YPpxiiuS7wi2IdlUcdG5/xX0M3I0rssjH6FuHoSsZ rp3vqbLlxxN9ZPkrx9pFdAhHBEY1tPc= X-Proofpoint-ORIG-GUID: T6sZlsvK20NTSa677kWs-hrPLm2s8gvx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-08_05,2026-07-08_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 suspectscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 phishscore=0 spamscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607090029 On 7/6/2026 8:38 PM, Pavan Kondeti wrote: > On Mon, Jul 06, 2026 at 07:15:15PM -0700, Deepti Jaggi wrote: >> >> >> On 7/6/2026 6:57 AM, Pavan Kondeti wrote: >>> On Tue, May 26, 2026 at 01:12:58PM +0800, Shawn Guo wrote: >>>> diff --git a/arch/arm64/boot/dts/qcom/scmi-common.dtsi b/arch/arm64/boot/dts/qcom/scmi-common.dtsi >>>> new file mode 100644 >>>> index 000000000000..0c7ffe9e415c >>>> --- /dev/null >>>> +++ b/arch/arm64/boot/dts/qcom/scmi-common.dtsi >>>> @@ -0,0 +1,1918 @@ >>>> +// SPDX-License-Identifier: BSD-3-Clause >>>> +/* >>>> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. >>>> + */ >>>> + >>>> +#include >>>> + >>>> +&firmware { >>>> + scmi0: scmi-0 { >>>> + compatible = "qcom,scmi-smc"; >>>> + arm,smc-id = <0xc6008012>; >>>> + shmem = <&shmem0>; >>>> + interrupts = ; >>>> + interrupt-names = "a2p"; >>> >>> I believe this interrupt source is GearVM firmware via Gunyah's >>> doorbell, correct? How do we know that scmi0 instance's interrupt >>> is GIC_SPI#963? Are these assumed to be constant/fixed through out >>> the life time of this SoC? >> >> Yes, this interrupt is a Gunyah Rx doorbell VIRQ for SCMI a2p completion >> from GearVM to Linux. It is allocated by Gunyah RM from the platform's virtual >> IRQ range and patched into the DTB by Linux bootloader at boot stage. >> >>> > > Thanks Deepti. IIUC, GIC_SPI#963 may be overridden by bootloader and > potentially this IRQ can change across runs or when firmware is changed > etc. The interrupt property is a place holder. can you confirm please? > IRQ will not change across runs , it may change with firmware updates. > Thanks, > Pavan