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

[Yijie Yang]

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@xxxxxxxxxxxxxxxx>
> > > >
> > > > 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@xxxxxxxxxxxxxxxx>
> > > > ---
> > > > 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@xxxxxxxxxxxxxxxx
> > > >
> > > > 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@xxxxxxxxxxxxxxxx/
> > > >
> > > > 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@xxxxxxxxxxxxxxxx
> > > >
> > > > 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@xxxxxxxxxxxxxxxx/
> >
> > 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@xxxxxxxxxxxxxxxx>
> >
> > --
> > Best Regards,
> > Yijie

--
Best Regards,
Yijie