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

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Message-ID: <dmdtwsdwl2bl7mn6j4d4xv76h6bo57van3ni4zt3iapq5bonsp@rxoqan4nahud>
Date: Mon, 22 Dec 2025 11:18:51 +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
Subject: Re: [PATCH 0/4] Initial patch set for PURWA-IOT-EVK

On Mon, Dec 22, 2025 at 02:03:25PM +0800, YijieYang wrote:
> From: Yijie Yang <yijie.yang@....qualcomm.com>
> 
> Introduce the device tree, DT bindings, and driver modifications required
> to bring up the PURWA-IOT-EVK evaluation board.
> 
> Purwa and Hamoa are IoT variants of x1p42100 and x1e80100, both based on
> the IQ-X SoC series. Consequently, the two common files in this series are
> prefixed with 'iq-x-iot' to reflect this relationship.
> 
> PURWA-IOT-EVK shares almost the same hardware design with HAMOA-IOT-EVK,
> except for differences in the BOM. As a result, most of the DTS can be
> shared between them.
> 
> The changes focus on two key hardware components: the PURWA-IOT-SOM and
> the PURWA-IOT-EVK carrier board.
> 
> Hardware delta between Hamoa and Purwa:
> - Display: Purwa’s display uses a different number of clocks, and its
>   frequency differs from Hamoa.
> - GPU: Purwa requires a separate firmware compared to Hamoa.

Is it just a separate firmware, or does it use a different _GPU_?

> - USB0: Purwa uses a PS8833 retimer, while Hamoa uses an FSUSB42 as the
>   SBU switch.
> 

-- 
With best wishes
Dmitry