linux-kernel - Re: [PATCH v4 0/4] Initial patch set for PURWA-IOT-EVK

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Message-ID: <jeyj5wqu4uw7tnm4h5ryatoqupdrqpkjcynnydgbum6oj2d4jj@qvvbbifrvud3>
Date: Fri, 16 Jan 2026 13:31:55 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: YijieYang <yijie.yang@....qualcomm.com>
Cc: andersson@...nel.org, konradybcio@...nel.org, robh@...nel.org,
        krzk+dt@...nel.org, conor+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
Subject: Re: [PATCH v4 0/4] Initial patch set for PURWA-IOT-EVK

On Fri, Jan 16, 2026 at 06:41:26PM +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 v4:
> - EDITME: describe what is new in this series revision.
> - EDITME: use bulletpoints and terse descriptions.

Oh no. B4 probably even warned you about not sending it out.

>From this changelog I can assume that nothing has changed. Is it
correct?

> - Link to v3: https://lore.kernel.org/r/20260113-purwa-v3-0-16eefacbdce9@oss.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/
> 
> ---
> 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: 377054868ffa544991cc491ecc4016589fc58565
> change-id: 20251113-purwa-907ec75b4959
> 
> Best regards,
> --  
> Yijie Yang <yijie.yang@....qualcomm.com>
> 

-- 
With best wishes
Dmitry