Message-ID: <e2dfb857-1fd1-4d29-b04b-6dec0b7563d5@oss.qualcomm.com>
Date: Mon, 19 Jan 2026 14:54:04 +0800
From: Yijie Yang <yijie.yang@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....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 1/19/2026 2:34 PM, Dmitry Baryshkov wrote:
> On Mon, Jan 19, 2026 at 10:39:04AM +0800, Yijie Yang wrote:
>>
>>
>> On 1/16/2026 7:31 PM, Dmitry Baryshkov wrote:
>>> 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?
>>
>> This section was generated automatically by b4 and was not reviewed
>> carefully. The actual list of changes is in the section below.
> 
> But why????? Why do you ignore what was done for you and write it on
> your own, reversing the order, etc? And even if you decided to ignore it
> for any reason, why didn't you delete it?

The confusion was caused by mixing b4 and git format-patch to handle 
fine‑grained patch formatting. The Git configuration Konrad suggested 
did not work for me. I ran b4 prep --manual-reroll <msg-id> to allow b4 
to track the upstream thread, which caused this section to be generated 
automatically. I did not notice this and mistakenly re‑wrote it myself.

> 
>>
>>>
>>>> - 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/
>>
>> Here.
>>
>>>>
>>>> ---
>>>> 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>
>>>>
>>>
>>
>> -- 
>> Best Regards,
>> Yijie
>>
> 

-- 
Best Regards,
Yijie

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