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Tue, 20 Oct 2026 05:14:50 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c40914c3fd7sm472344566b.43.2026.10.20.05.14.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 20 Oct 2026 05:14:48 -0700 (PDT) Message-ID: <302ff5ea-cd47-4703-8b29-125d5f91ccc2@oss.qualcomm.com> Date: Tue, 20 Oct 2026 14:14:46 +0200 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 5/7] arm64: dts: qcom: Add device tree for Lemans GearVM variant To: Shawn Guo , Bjorn Andersson Cc: Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Deepti Jaggi , devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Shazad Hussain , Nikunj Kela References: <20261015023711.721837-1-shengchao.guo@oss.qualcomm.com> <20261015023711.721837-6-shengchao.guo@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261015023711.721837-6-shengchao.guo@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: FHQB8RKg4Yek_vnU1K3kfg37lHdCB6m9 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIwMDA0OCBTYWx0ZWRfX6yTFktUWQ7JN 5AqcC39DiNZnKtIVad802VFMzghP4w9carsTbjFC/tCtZ/u0ATJTstrikwULO+ssJoPscCl/ilO +WSH0LthgcS+eNvF8r1x6WzLAIbyF1U= X-Proofpoint-ORIG-GUID: FHQB8RKg4Yek_vnU1K3kfg37lHdCB6m9 X-Authority-Analysis: v=2.4 cv=A5z5rKWG c=1 sm=1 tr=0 ts=6ad75b40 cx=c_pps a=+D9SDfe9YZWTjADjLiQY5g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=YyVq5OKRWxwgIy3V0V0A:9 a=QEXdDO2ut3YA:10 a=vmgOmaN-Xu0dpDh8OwbV:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIwMDA0OCBTYWx0ZWRfX5yYcG2YG7FcN AA4fkfcAWymTjwpbhuWz+FHcGR5RCGB1kz3BmQcmuRFXwoo6wXNmzSL5hmKLmpOIdlnkulrFdcx k94Bg/+7xSMdXNG8aD2gbyrfWSgS7p8h0bNBXgCl9nJ0DzizM6RvB2lLubMsQW0Sn6dXF+pHqAR SiJYokCEJy+d5wp3mHJ+zsC9EzOe6ir1Y1p6We9/LEVkGYDvnmyS2W1DmiN2SGVutypgPwXOHIE PJ7a7zgK/P1wfdRdW9AMt0u8aIES5hZqQsDMkwFBtZs6SlXaZ1++PDUapxqi7IIHOg1dxNQmtqt sjfz2S13aq2HQi0ZY3w0FXjcuOweDsNmRh50GIDyHkn4LnJrGmWetjeuLWeJTK36pykMbQ9GcI5 xzvsnwBj++B9LCbQgfcBCoU+nK4GSLPWSSfAo2ctIO/uYQjn+g8EoNqaNMxMlyYsxLHG4cudp0A oO77iQtRiuOyluT5mmQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-20_01,2026-10-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 adultscore=0 priorityscore=1501 suspectscore=0 phishscore=0 spamscore=0 bulkscore=0 impostorscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610200048 On 10/15/26 4:37 AM, Shawn Guo wrote: > Add lemans-gearvm.dtsi for Lemans GearVM variant (SA8255P) that 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. [...] > +&firmware { > + scm { > + memory-region = <&tz_ffi_mem>; > + }; SCM should have its own label since it's an existing node [...] > +&qupv3_id_0 { > + compatible = "qcom,sa8255p-geni-se-qup"; > + > + i2c0: i2c@980000 { Likewise all of these [...] > + cma: linux,cma { > + compatible = "shared-dma-pool"; > + alloc-ranges = <0x0 0x00000000 0x0 0xdfffffff>; > + reusable; > + alignment = <0x0 0x400000>; > + size = <0x0 0x2000000>; > + linux,cma-default; What's the nonobvious reason for this? Konrad