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Mon, 06 Jul 2026 20:38:20 -0700 (PDT) Received: from hu-pkondeti-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-31174ac178dsm3126112eec.28.2026.07.06.20.38.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jul 2026 20:38:20 -0700 (PDT) Date: Tue, 7 Jul 2026 09:08:13 +0530 From: Pavan Kondeti To: Deepti Jaggi Cc: Pavan Kondeti , 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 Subject: Re: [PATCH v3 RESEND 3/5] arm64: dts: qcom: Add device tree for Nord SA8797P SoC Message-ID: 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46af10c8-8400-4131-ac87-b3f17350bb65@oss.qualcomm.com> X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA3MDAzMCBTYWx0ZWRfXz4BI1cK+6usK GiveczpekgVTq2/ZuNAlhNiI+58RZROeXUkobFqVEvZc2ajk1x2KSO/wyQa1q8t70sX8A4I8mnH J9oaZp32LqOYix4pCuEQ8hxor1rHNZGwsHRoagbNhypTpftUO/eVSgAejrccwOpHqNU7uyBpNJw w0+7GGbDmlDbB1T7c/C1I7u0j/F07afvcdzBcvx4Ix7b4x/CqYW/VmVYeobuz0iLrBYubQ3r7S3 uekXcVsLJynXXK2T2WsmIeEaun1hnXuBcHAdhuLQnbIh5Ty8x5lgtKUG42A9oLIJ1sMUK40wnU0 sGyzYlCUgoQVRcnAZ6q2uiP9+M096pOCUaaVHQj4p9WvbaBhKjYUQsIhokVoSOwB3GvXsEAoQ4K 3BEc4YhwWH8TUSxY5Y1zVZTu6cJndC6D004ufINANy99G8/SlI+1XjPG4XhKDpDAqmjMxWikPT6 QzJWL2gXLiYzgynv1Cw== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA3MDAzMCBTYWx0ZWRfX4LcExLzvlGgO 8wfrH5/40nmaFmwuG0lWRWDn2LcvjwygzcimNaICGF0OxE/+1q9Ut35ODAvcQoaJ31ExZsFwzXT jeTlrZaOF1o/DrckNaSnI+HpD+bz3qU= X-Proofpoint-GUID: 9uDkuGBFdT_bfwfomW6lkgZHe1YEtJCM X-Proofpoint-ORIG-GUID: 9uDkuGBFdT_bfwfomW6lkgZHe1YEtJCM X-Authority-Analysis: v=2.4 cv=OKcXGyaB c=1 sm=1 tr=0 ts=6a4c74ad cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=kj9zAlcOel0A:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=1l3KTh2Z3xRHg-jYdCcA:9 a=CjuIK1q_8ugA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 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=2026-07-06_03,2026-07-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 malwarescore=0 clxscore=1015 suspectscore=0 spamscore=0 phishscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607070030 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? Thanks, Pavan