From: Komal Bajaj <komal.bajaj@oss.qualcomm.com>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>, Vinod Koul <vkoul@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Wesley Cheng <quic_wcheng@quicinc.com>,
Ulf Hansson <ulfh@kernel.org>,
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
Subject: Re: [PATCH v3 1/5] dt-bindings: arm: qcom: Document Shikra and its EVK boards
Date: Wed, 27 May 2026 12:42:20 +0530 [thread overview]
Message-ID: <951c9b8f-4513-47ca-afb6-481dedd3eff9@oss.qualcomm.com> (raw)
In-Reply-To: <20260526-quantum-funny-gorilla-cfc983@quoll>
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
>
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next prev parent reply other threads:[~2026-05-27 7:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-22 18:02 [PATCH v3 0/5] arm64: dts: qcom: Add initial device tree support for Shikra Komal Bajaj
2026-05-22 18:02 ` [PATCH v3 1/5] dt-bindings: arm: qcom: Document Shikra and its EVK boards Komal Bajaj
2026-05-26 15:45 ` Krzysztof Kozlowski
2026-05-27 7:12 ` Komal Bajaj [this message]
2026-05-27 8:55 ` Krzysztof Kozlowski
2026-05-27 14:09 ` Komal Bajaj
2026-05-22 18:02 ` [PATCH v3 2/5] arm64: dts: qcom: Introduce Shikra SoC base dtsi Komal Bajaj
2026-05-22 18:02 ` [PATCH v3 3/5] arm64: dts: qcom: Add Shikra CQ2390M SoM platform Komal Bajaj
2026-05-22 19:10 ` sashiko-bot
2026-05-25 9:34 ` Rakesh Kota
2026-05-25 13:16 ` Konrad Dybcio
2026-05-27 13:32 ` Komal Bajaj
2026-06-08 10:44 ` Konrad Dybcio
2026-05-22 18:02 ` [PATCH v3 4/5] arm64: dts: qcom: Add Shikra IQ2390S " Komal Bajaj
2026-05-22 18:02 ` [PATCH v3 5/5] arm64: dts: qcom: Add Shikra EVK boards Komal Bajaj
2026-05-22 19:39 ` sashiko-bot
2026-05-24 13:07 ` Komal Bajaj
2026-05-25 13:17 ` Konrad Dybcio
2026-05-25 13:14 ` [PATCH v3 0/5] arm64: dts: qcom: Add initial device tree support for Shikra Konrad Dybcio
2026-05-27 13:51 ` Komal Bajaj
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