linux-kernel - Re: [PATCH v5 0/4] Initial patch set for PURWA-IOT-EVK

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Message-ID: <d3mvqtyd6dsphkojenpalduty7x2n3yxf6rjazwndisxnktez7@iwb2nnxwvg4d>
Date: Wed, 4 Feb 2026 04:38:43 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Yijie Yang <yijie.yang@....qualcomm.com>
Cc: Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>,
        andersson@...nel.org, krzk+dt@...nel.org, konradybcio@...nel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, conor+dt@...nel.org,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v5 0/4] Initial patch set for PURWA-IOT-EVK

On Wed, Feb 04, 2026 at 09:42:04AM +0800, Yijie Yang wrote:
> 
> 
> On 2/4/2026 1:37 AM, Rob Herring wrote:
> > 
> > On Mon, 02 Feb 2026 15:35:44 +0800, YijieYang wrote:
> > > From: Yijie Yang <yijie.yang@....qualcomm.com>
> > > 
> > > Introduce the device tree, DT bindings, and driver updates required to enable
> > > the bring-up of the PURWA-IOT-EVK evaluation board. Focus is on two key
> > > hardware components:
> > > 
> > > PURWA-IOT-SOM — A compact System-on-Module integrating the SoC, GPIOs, and
> > > PMICs. Designed for modularity, it can pair with various carrier boards to
> > > support diverse use cases.
> > > 
> > > PURWA-IOT-EVK — A carrier board tailored for IoT scenarios, providing
> > > essential peripherals such as UART, on-board PMICs, and USB components.
> > > 
> > > Together, these components form a flexible and scalable platform. Initial
> > > functionality is achieved through proper device tree configuration and driver
> > > support.
> > > 
> > > The PURWA-IOT-EVK/SOM shares most of its hardware design with
> > > HAMOA-IOT-EVK/SOM, differing primarily in the BOM. Consequently, the DTS files
> > > are largely similar. Both platforms belong to Qualcomm’s IQ-X family. For more
> > > details on the IQ-X series, see:
> > > https://www.qualcomm.com/internet-of-things/products/iq-x-series
> > > 
> > > Hardware differences between HAMOA-IOT and PURWA-IOT:
> > > - Display — PURWA uses a different number of clocks and frequency compared to
> > >    HAMOA.
> > > - GPU — PURWA integrates a different GPU.
> > > - USB0 — PURWA uses a PS8833 retimer, while HAMOA employs an FSUSB42 as the
> > >    SBU switch.
> > > 
> > > Features added and enabled:
> > > - UART
> > > - On-board regulators
> > > - Regulators on the SOM
> > > - PMIC GLINK
> > > - USB0 through USB6 and their PHYs
> > > - Embedded USB (eUSB) repeaters
> > > - USB Type-C mux
> > > - PCIe3, PCIe4, PCIe5, PCIe6a
> > > - Reserved memory regions
> > > - Pinctrl
> > > - NVMe
> > > - ADSP, CDSP
> > > - WLAN, Bluetooth (M.2 interface)
> > > - USB DisplayPort and eDP
> > > - Graphics
> > > - Audio
> > > - TPM
> > > 
> > > Signed-off-by: Yijie Yang <yijie.yang@....qualcomm.com>
> > > ---
> > > Changes in v2:
> > > - Update the GPU firmware path.
> > > - Update the description in the cover letter.
> > > - Reorder the patches.
> > > - Use separate DTS files for Purwa and Hamoa.
> > > - Update base commit.
> > > - Link to v1: https://lore.kernel.org/all/20251222-purwa-v1-0-14ab9316e5ff@oss.qualcomm.com/
> > > 
> > > Changes in v3:
> > > - Delete unused PMIC and thermal nodes.
> > > - Add WiFi node.
> > > - Add display backlight node.
> > > - Add connectors and VBUS regulators for USB3 and USB6.
> > > - Enable PCIe3 and PCIe5; add PCIe ports along with reset and wake-up GPIOs.
> > > - Link to v2: https://lore.kernel.org/r/20260109-purwa-v2-0-f39ee10684cb@oss.qualcomm.com
> > > 
> > > Changes in v4:
> > > - Enable TPM.
> > > - Update the descriptions for video and the USB OF graph.
> > > - Link to v3: https://lore.kernel.org/all/20260113-purwa-v3-0-16eefacbdce9@oss.qualcomm.com/
> > > 
> > > Changes in v5:
> > > - Reorder nodes in purwa-iot-evk.dts.
> > > - Update base commit.
> > > - The DT binding change that fixes the DT warning for pcie3_phy is located at: https://lore.kernel.org/linux-arm-msm/20260119-topic-purwa_phy_shutup_warning-v1-1-997a692b31c6@oss.qualcomm.com/T/#u
> > > - Link to v4: https://lore.kernel.org/r/20260116-purwa-v4-0-89b2adae9f09@oss.qualcomm.com
> > > 
> > > ---
> > > Yijie Yang (4):
> > >        dt-bindings: arm: qcom: Document PURWA-IOT-EVK board
> > >        firmware: qcom: scm: Allow QSEECOM on PURWA-IOT-EVK
> > >        arm64: dts: qcom: Add PURWA-IOT-SOM platform
> > >        arm64: dts: qcom: Add base PURWA-IOT-EVK board
> > > 
> > >   Documentation/devicetree/bindings/arm/qcom.yaml |    6 +
> > >   arch/arm64/boot/dts/qcom/Makefile               |    1 +
> > >   arch/arm64/boot/dts/qcom/purwa-iot-evk.dts      | 1549 +++++++++++++++++++++++
> > >   arch/arm64/boot/dts/qcom/purwa-iot-som.dtsi     |  685 ++++++++++
> > >   drivers/firmware/qcom/qcom_scm.c                |    1 +
> > >   5 files changed, 2242 insertions(+)
> > > ---
> > > base-commit: 6267b2da1b2d04847a1a8f441e138bc4a89435ee
> > > change-id: 20251113-purwa-907ec75b4959
> > > 
> > > Best regards,
> > > --
> > > Yijie Yang <yijie.yang@....qualcomm.com>
> > > 
> > > 
> > > 
> > 
> > 
> > My bot found DTB warnings on the .dts/.dtsi files added or changed in
> > this series.
> > 
> > Some warnings may be existing warnings. Consider fixing existing
> > warnings before adding new features.
> > 
> > Perhaps the warnings are fixed by another series. If that is the case,
> > please set the base commit and any dependencies for the series using
> > "b4".
> > 
> > Ultimately, it is up to the platform maintainer whether these warnings
> > are acceptable or not.
> > 
> > If you already ran DT checks and didn't see these error(s), then
> > make sure dt-schema is up to date:
> > 
> >    pip3 install dtschema --upgrade
> > 
> > 
> > This patch series was applied (using b4) to base:
> >   Base: 6267b2da1b2d04847a1a8f441e138bc4a89435ee (use --merge-base to override)
> > 
> > If this is not the correct base, please add 'base-commit' tag
> > (or use b4 which does this automatically)
> > 
> > 
> > New warnings running 'make CHECK_DTBS=y for arch/arm64/boot/dts/qcom/' for 20260202-purwa-v5-0-1f5a93578802@....qualcomm.com:
> > 
> > arch/arm64/boot/dts/qcom/purwa-iot-evk.dtb: phy@...4000 (qcom,x1p42100-qmp-gen4x4-pcie-phy): 'qcom,4ln-config-sel' is a required property
> > 	from schema $id: http://devicetree.org/schemas/phy/qcom,sc8280xp-qmp-pcie-phy.yaml
> > 
> 
> I have already listed the fix in the cover letter:
> https://lore.kernel.org/linux-arm-msm/20260119-topic-purwa_phy_shutup_warning-v1-1-997a692b31c6@oss.qualcomm.com/T/#u
> It is not recommended to list it as a dependency in the latest version.

You can use `b4 prep --edit-deps` to mark it as a dependency to be
picked up by the bot.

> 
> 
> > 
> > 
> > 
> 
> -- 
> Best Regards,
> Yijie
> 

-- 
With best wishes
Dmitry