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

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Message-ID: <d38a785c-d4fa-4014-b0d5-3ce0fb0448bf@oss.qualcomm.com>
Date: Wed, 24 Dec 2025 10:03:27 +0800
From: Yijie Yang <yijie.yang@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Konrad Dybcio <konrad.dybcio@....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 12/24/2025 3:09 AM, Dmitry Baryshkov wrote:
> On Tue, Dec 23, 2025 at 06:27:05PM +0100, Konrad Dybcio wrote:
>> On 12/23/25 3:12 AM, Yijie Yang wrote:
>>>
>>>
>>> On 12/22/2025 5:18 PM, Dmitry Baryshkov wrote:
>>>> 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_?
>>>
>>> It uses a different GPU.
>>
>> I think it would be useful to call this paragraph "Hardware delta between
>> Hamoa-IoT-SoM/EVK and Purwa-IoT-whatever - because now Dmitry is asking
>> about differences between Hamoa-the-SoC and Purwa-the-SoC which we
>> expressed in purwa.dtsi
> 
> Nah, I pointed out that the letter is incorrect. It's not just a
> different firmware for the _same_ GPU. It's a different GPU revision.

I’ll update the description here.

> 

-- 
Best Regards,
Yijie