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

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Message-ID: <9804a98e-ffc0-4346-8b49-0d7670e150ec@oss.qualcomm.com>
Date: Tue, 30 Dec 2025 10:51:01 +0800
From: Yijie Yang <yijie.yang@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....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 12/29/2025 8:18 PM, Konrad Dybcio wrote:
> On 12/24/25 3:02 AM, Yijie Yang wrote:
>>
>>
>> On 12/24/2025 1:27 AM, 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
>>
>> I want to provide readers with a comprehensive comparison of the two boards, Hamoa-IoT-EVK and Purwa-IoT-EVK, covering all differences in both the SOM and the carrier board.
> 
> Of course - my comment points out that the specific wording of "delta
> between Hamoa and Purwa" may be easily misinterpreted as not what you're
> saying above

Okay, I’ll update it.

> 
> Konrad

-- 
Best Regards,
Yijie