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Wed, 27 May 2026 00:12:27 -0700 (PDT) X-Received: by 2002:a17:902:ceca:b0:2b4:604c:ec6f with SMTP id d9443c01a7336-2beb069853bmr239368465ad.32.1779865946736; Wed, 27 May 2026 00:12:26 -0700 (PDT) Received: from [10.219.57.29] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2beb56ce4easm134672025ad.30.2026.05.27.00.12.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 27 May 2026 00:12:26 -0700 (PDT) Message-ID: <951c9b8f-4513-47ca-afb6-481dedd3eff9@oss.qualcomm.com> Date: Wed, 27 May 2026 12:42:20 +0530 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 1/5] dt-bindings: arm: qcom: Document Shikra and its EVK boards To: Krzysztof Kozlowski Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul , Neil Armstrong , Wesley Cheng , Ulf Hansson , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, linux-mmc@vger.kernel.org, monish.chunara@oss.qualcomm.com References: <20260522-shikra-dt-v3-0-80ffde8a3dc4@oss.qualcomm.com> <20260522-shikra-dt-v3-1-80ffde8a3dc4@oss.qualcomm.com> <20260526-quantum-funny-gorilla-cfc983@quoll> Content-Language: en-US From: Komal Bajaj In-Reply-To: <20260526-quantum-funny-gorilla-cfc983@quoll> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: Ivyz812nIOcu-43Sa2G5i4IJtwwhp8Nm X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTI3MDA2OCBTYWx0ZWRfX/XtpFp7zNv6W 5lZCklBn8sCB2WtbCRKnqNWTsmA8izhX8ds8+ttEjecHTezmDljsWyQ0XnAtNUT3Cdv0MYOxTcb F3GewBfo4/RBxHEnl5DD/VkjPrsvFbTfme39mdT+1bMNfScQOGwTUk/2PnJGS5d6OU+IO7xb3C+ xO5G1EkwRaotJ/r7AiW0aIp9zB6eEO6d6sXNNckpPcnFSYPu7u8ljEMFIUXJzZumtPiOLL0Qort eEWZjuIf3Ldxp3g5+VTeTzwXVPi5Bi8wHy5MIklzwTNQnI6Fzk5nvRcdinSmPOxGfEKgq5i9Jfu 7P94NYUwiURtTcHEjlAc6LTAu2dXwvQegExjPyNim12iThMZxCgqta1EISaxre6gAiUN4hV21E8 yoyuBY+lyVIg3YxBRw4FjhmxxR5y53Y7VcsB2mPNUxCxG8MsafgG4LsT7/Y1369Ub+V0D/dAJyI s9JnAplxTHcGcIWh1hg== X-Authority-Analysis: v=2.4 cv=I95Vgtgg c=1 sm=1 tr=0 ts=6a16995b cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=kjqM9UcslzgJvOEO4JEA:9 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-GUID: Ivyz812nIOcu-43Sa2G5i4IJtwwhp8Nm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-05-26_05,2026-05-26_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 lowpriorityscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605270068 On 5/26/2026 9:15 PM, Krzysztof Kozlowski wrote: > On Fri, May 22, 2026 at 11:32:24PM +0530, Komal Bajaj wrote: >> Shikra is a Qualcomm IoT SoC available in a System-on-Module (SoM) >> form factor. The SoM integrates the Shikra SoC, PMICs, and essential >> passives, and is designed to be mounted on carrier boards. >> >> Three eSoM variant are introduced: >> - CQM: retail variant with integrated modem >> - CQS: retail variant without modem >> - IQS: industrial-grade variant without modem > Industrial/consumer variants differ often only with thermal, so how is > it here? Thermal difference does not make them incompatible. Honestly, > usually industrial one does not even receive dedicated compatibles. The IQS variant uses a PM8150 PMIC, while CQS/CQM use PM4125 + PM8005. These have different regulator topologies and RPM regulator bindings, making the DTBs genuinely incompatible, IQS SoM cannot boot with CQS DTB. Thus, a separate compatible is required and not merely a thermal distinction. Thanks Komal > Best regards, > Krzysztof >