linux-kernel - Re: [PATCH v5 0/3] Initial support for Qualcomm Hamoa IOT EVK board

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Message-ID: <5reeryefhw7burzf2lymhg5wivaq2n4gq5hszvfp57dergvpyx@qehaf334gdrn>
Date: Thu, 14 Aug 2025 11:24:03 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Yijie Yang <yijie.yang@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Yingying Tang <quic_yintang@...cinc.com>,
        Shuai Zhang <quic_shuaz@...cinc.com>,
        Yongxing Mou <quic_yongmou@...cinc.com>
Subject: Re: [PATCH v5 0/3] Initial support for Qualcomm Hamoa IOT EVK board

On Thu, Aug 14, 2025 at 03:27:27PM +0800, Yijie Yang wrote:
> Introduce the device tree, DT bindings, and driver modifications required
> to bring up the HAMOA-IOT-EVK evaluation board—based on the X1E80100 SoC—to
> a UART shell.
> This patch set focuses on two key hardware components: the HAMOA-IOT-SOM
> and the HAMOA-IOT-EVK carrier board.
> The HAMOA-IOT-SOM is a compact System on Module that integrates the SoC,
> GPIOs, and PMICs. It is designed to be modular and can be paired with
> various carrier boards to support different use cases.
> The HAMOA-IOT-EVK is one such carrier board, designed for IoT scenarios.
> It provides essential peripherals such as UART, on-board PMICs, and
> USB-related components.
> Together, these components form a flexible and scalable platform, and this
> patch set enables their initial bring-up through proper device tree
> configuration and driver support.
> 
> Qualcomm SoCs often have multiple product variants, each identified by a
> different SoC ID. For instance, the x1e80100 SoC has closely related
> variants such as x1e78100 and x1e001de. This diversity in SoC identifiers
> can lead to confusion and unnecessary maintenance complexity in the device
> tree and related subsystems.
> To address this, code names offer a more consistent and project-agnostic
> way to represent SoC families. They tend to remain stable across
> development efforts.
> This patch series introduces "hamoa" as the codename for the x1e80100 SoC.
> Going forward, all x1e80100-related variants—including x1e81000 and others
> in the same family—will be represented under the "hamoa" designation in the
> device tree.
> This improves readability, streamlines future maintenance, and aligns with
> common naming practices across Qualcomm-based platforms. 
> 
> 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
> - PCIe6a and its PHY
> - PCIe4 and its PHY
> - Reserved memory regions
> - Pinctrl
> - NVMe
> - ADSP, CDSP
> - WLAN, Bluetooth (M.2 interface)
> - USB DisplayPort
> 
> DTS Dependency:
> https://lore.kernel.org/all/20250724-move-edp-endpoints-v1-3-6ca569812838@oss.qualcomm.com/
> 
> Signed-off-by: Yijie Yang <yijie.yang@....qualcomm.com>
> ---
> To: Bjorn Andersson <andersson@...nel.org>
> To: Konrad Dybcio <konradybcio@...nel.org>
> To: Rob Herring <robh@...nel.org>
> To: Krzysztof Kozlowski <krzk+dt@...nel.org>
> To: Conor Dooley <conor+dt@...nel.org>
> Cc: linux-arm-msm@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> 
> ---
> Changes in v5:
> - Update base commit.
> - Drop an already merged patch:
> https://lore.kernel.org/all/20250804-hamoa_initial-v4-2-19edbb28677b@oss.qualcomm.com/
> - Link to v4: https://lore.kernel.org/r/20250804-hamoa_initial-v4-0-19edbb28677b@oss.qualcomm.com

Please keep full changelog rather than trimming previous iterations.

Also, is there a reason why you didn't pick up audio and display chunks
as it was requested on the corresponding reviews?

> 
> ---
> Yijie Yang (3):
>       dt-bindings: arm: qcom: Document HAMOA-IOT-EVK board
>       arm64: dts: qcom: Add HAMOA-IOT-SOM platform
>       arm64: dts: qcom: Add base HAMOA-IOT-EVK board
> 
>  Documentation/devicetree/bindings/arm/qcom.yaml |   6 +
>  arch/arm64/boot/dts/qcom/Makefile               |   1 +
>  arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts      | 987 ++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/hamoa-iot-som.dtsi     | 609 +++++++++++++++
>  4 files changed, 1603 insertions(+)
> ---
> base-commit: 2016d952577e807ee89e0cef02af1f95aabbbcb2
> change-id: 20250604-hamoa_initial-0cd7036d7271
> prerequisite-message-id: <20250724-move-edp-endpoints-v1-3-6ca569812838@....qualcomm.com>
> prerequisite-patch-id: c536bf9ec7fd22af9b05b695272997615dfd675f
> prerequisite-patch-id: d513e5a08d3be585b9b6a737ef3a1ad275d7caad
> prerequisite-patch-id: 605ef6f89dd84f810df11be9d11ee6803a6bf289
> prerequisite-patch-id: 2ab2430624acbdd9011f6c0c2a77469fd19fc75a
> prerequisite-patch-id: bfbb562513763ce75f2bb5da7f12e7b54ff3919d
> 
> Best regards,
> -- 
> Yijie Yang <yijie.yang@....qualcomm.com>
> 

-- 
With best wishes
Dmitry