linux-kernel - Re: [PATCH 1/4] dt-bindings: arm: qcom: Document HAMOA-IOT-EVK board

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Message-ID: <e65c43fc-c188-4acf-a0ae-c34ad171fded@oss.qualcomm.com>
Date: Wed, 16 Jul 2025 12:26:50 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        Yijie Yang <yijie.yang@....qualcomm.com>,
        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>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] dt-bindings: arm: qcom: Document HAMOA-IOT-EVK board

On 7/16/25 11:30 AM, Krzysztof Kozlowski wrote:
> On 16/07/2025 11:08, Yijie Yang wrote:
>> Document the device tree binding for a new board named "EVK" based on
>> the Qualcomm Hamoa-IoT platform.
>>
>> The "hamoa" name refers to a family of SoCs that share the same silicon
>> die but are offered in multiple speed bins. The specific SoC used in
>> this board is the x1e80100, which represents one such bin within the
>> Hamoa family.
>>
>> Although "qcom,hamoa-iot-evk" is introduced as the board-specific
>> compatible, the fallback compatible remains "qcom,x1e80100" to preserve
>> compatibility with existing in-kernel drivers and software that already
>> depend on this identifier.
>>
>> Signed-off-by: Yijie Yang <yijie.yang@....qualcomm.com>
>> ---
>>  Documentation/devicetree/bindings/arm/qcom.yaml | 9 +++++++--
>>  1 file changed, 7 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/qcom.yaml b/Documentation/devicetree/bindings/arm/qcom.yaml
>> index ae43b35565808ed27cd8354b9a342545c4a98ed6..83b09ec1100ca03044c832212a99e65cc1177985 100644
>> --- a/Documentation/devicetree/bindings/arm/qcom.yaml
>> +++ b/Documentation/devicetree/bindings/arm/qcom.yaml
>> @@ -100,8 +100,8 @@ description: |
>>          sm8550
>>          sm8650
>>          sm8750
>> -        x1e78100
>> -        x1e80100
>> +        x1e78100 # hamoa
>> +        x1e80100 # hamoa
> 
> 
> Huh? Why, no drop.

I suggested this, so that people who read this file for the first
time have an idea of which magic numbers correspond to what magic
name for existing platforms (where new DTs will be expected to include
the codename in the file name (just like this submission) to get away
from SKU/speedbin names).

We can drop it if you insist, but I'd rather keep it for newcomers.

Konrad