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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-68310d58df1sm7847371a12.13.2026.05.20.02.59.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 20 May 2026 02:59:11 -0700 (PDT) Message-ID: Date: Wed, 20 May 2026 11:59:09 +0200 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 1/2] dt-bindings: soc: qcom: Document CDSP Power Management To: Vignesh Viswanathan , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Liam Girdwood , Mark Brown Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260520-cdsp-power-v1-0-85eb9501a1cd@oss.qualcomm.com> <20260520-cdsp-power-v1-1-85eb9501a1cd@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260520-cdsp-power-v1-1-85eb9501a1cd@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: 106HNKbsxRDFyM1BdU00Si7riXOLHjyQ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTIwMDA5NSBTYWx0ZWRfX8EN787BytVtK VL4DFx00lRK3pgYR2G1Hqm7Fous/fa+nXUeHnW8vUCHGAGxvomV4HsAwkoCquRK4Dy2uuOCbihK h3n410JqFM1nvsaKM+DpCJ/3v9YS6ThxlE3O4OtdvPtsriaOU99FNVuF7FNTP/+yxLdEVT7orA/ ezEUWGAGHdl8YNx6RqxSym34eQZOlzWDyWuRS2O3XR4bX7wDORNkQTtfqPEg+On8ArjuBK3yq8u Gjrx7WFxM9A3nX+bLmeDPWB2am/UCzIObMkMoA0ltffIJmNqMZ6eQxpXl68dwcUoRoJIACH6RQu zjazsPZ8FF+7RMJxsuVfcHzvu4qoVLlhWEm1sOsaQj8GAhT89/Fn606E02STejDG8CIZJ7H1u+M rENcFhESAMMP9uJj34On9o9lZMatUwUORy1EE4+wtYYhnUwVsKJ8Arkhm+Ssvp1+WilMyn9FHLM 1z0zXV4a4QJC+HdHjiA== X-Authority-Analysis: v=2.4 cv=JuPBas4C c=1 sm=1 tr=0 ts=6a0d85f2 cx=c_pps a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=b5dwZOq_2XybwdJL-ncA:9 a=QEXdDO2ut3YA:10 a=a_PwQJl-kcHnX1M80qC6:22 X-Proofpoint-ORIG-GUID: 106HNKbsxRDFyM1BdU00Si7riXOLHjyQ 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=2026-05-20_02,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 suspectscore=0 lowpriorityscore=0 adultscore=0 clxscore=1015 phishscore=0 impostorscore=0 malwarescore=0 spamscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605200095 On 5/19/26 9:05 PM, Vignesh Viswanathan wrote: > Add documentation for the CDSP Power Management driver, which handles > Dynamic Clock and Voltage Scaling (DCVS) requests via SMEM, manages Low > Power Mode (LPM) transitions via MPM handshake, and provides virtual > regulators for the remoteproc driver to control CDSP power rails. > > Signed-off-by: Vignesh Viswanathan > --- [...] > +maintainers: > + - Vignesh Viswanathan > + > +description: > + The CDSP Power Management driver provides power management services for the > + Qualcomm Compute DSP (CDSP) subsystem. It handles Dynamic Clock and Voltage > + Scaling (DCVS) requests via SMEM, manages Low Power Mode (LPM) transitions > + via MPM handshake, and provides virtual regulators that are consumed by the > + CDSP remoteproc driver. > + > +properties: > + compatible: > + const: qcom,cdsp-power This really needs to be SoC-specific > + > + reg: > + items: > + - description: MPM (Modem Power Manager) register region > + - description: RSCC (RSC Configuration) register region I was under the impression that these two belong to separate universes.. > + vdd-cx-supply: > + description: > + Phandle to the CX voltage regulator. This is the actual hardware regulator > + (e.g., from MP8899 PMIC) that supplies power to the CDSP CX rail. I believe the second sentence is wholly redundant [...] > + #include > + #include > + #include > + > + soc { > + #address-cells = <2>; > + #size-cells = <2>; > + > + cdsp_power: cdsp-power@4ae000 { > + compatible = "qcom,cdsp-power"; > + reg = <0x0 0x004ae000 0x0 0x1000>, MPM is a top-level peripheral, but this is a slice dedicated to the CDSP so maybe it'd pass, but.. > + <0x0 0x26018018 0x0 0x4>; This is a single random register within the CDSP's register space, so we should definitely be able to describe this better.. Konrad