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

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Message-ID: <b3p5yhstng6nbrrdavx67vlv62hqqlnms7742txbimpeswqklv@eomkmkkearwp>
Date: Mon, 19 Jan 2026 08:34:53 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Yijie Yang <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 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?

> 
> > 
> > > - 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
> 

-- 
With best wishes
Dmitry