linux-kernel - Re: [PATCH v3 3/4] arm64: dts: qcom: Add PURWA-IOT-SOM platform

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Message-ID: <e10925ab-85f5-460e-96b0-fc7c219c9517@oss.qualcomm.com>
Date: Wed, 14 Jan 2026 09:38:24 +0800
From: Yijie Yang <yijie.yang@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Vikash Garodia <vikash.garodia@....qualcomm.com>,
        Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
        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 v3 3/4] arm64: dts: qcom: Add PURWA-IOT-SOM platform



On 1/14/2026 1:50 AM, Dmitry Baryshkov wrote:
> On Tue, Jan 13, 2026 at 12:29:43PM +0100, Konrad Dybcio wrote:
>> On 1/13/26 11:47 AM, Dmitry Baryshkov wrote:
>>> On Tue, Jan 13, 2026 at 06:28:15PM +0800, YijieYang wrote:
>>>> From: Yijie Yang <yijie.yang@....qualcomm.com>
>>>>
>>>> The PURWA-IOT-SOM is a compact computing module that integrates a System
>>>> on Chip (SoC) — specifically the x1p42100 — along with essential
>>>> components optimized for IoT applications. It is designed to be mounted on
>>>> carrier boards, enabling the development of complete embedded systems.
>>>>
>>>> Make the following peripherals on the SOM enabled:
>>>> - Regulators on the SOM
>>>> - Reserved memory regions
>>>> - PCIe3, PCIe4, PCIe5, PCIe6a
>>>> - USB0 through USB6 and their PHYs
>>>> - ADSP, CDSP
>>>> - Graphic
>>>>
>>>> Signed-off-by: Yijie Yang <yijie.yang@....qualcomm.com>
>>>> ---
>>>>   .../qcom/{hamoa-iot-som.dtsi => purwa-iot-som.dtsi}   | 11 +++++------
>>>>   1 file changed, 5 insertions(+), 6 deletions(-)
>>>>   copy arch/arm64/boot/dts/qcom/{hamoa-iot-som.dtsi => purwa-iot-som.dtsi} (99%)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/hamoa-iot-som.dtsi b/arch/arm64/boot/dts/qcom/purwa-iot-som.dtsi
>>>> similarity index 99%
>>>> copy from arch/arm64/boot/dts/qcom/hamoa-iot-som.dtsi
>>>> copy to arch/arm64/boot/dts/qcom/purwa-iot-som.dtsi
>>>> index b8e3e04a6fbd..fb90beb1096f 100644
>>>> --- a/arch/arm64/boot/dts/qcom/hamoa-iot-som.dtsi
>>>> +++ b/arch/arm64/boot/dts/qcom/purwa-iot-som.dtsi
>>>> @@ -3,11 +3,14 @@
>>>>    * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
>>>>    */
>>>>   
>>>> -#include "hamoa.dtsi"
>>>> +#include "purwa.dtsi"
>>>>   #include "hamoa-pmics.dtsi"
>>>>   #include <dt-bindings/gpio/gpio.h>
>>>>   #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
>>>>   
>>>> +/delete-node/ &pmc8380_6;
>>>> +/delete-node/ &pmc8380_6_thermal;
>>>> +
>>>>   / {
>>>>   	reserved-memory {
>>>>   		linux,cma {
>>>> @@ -378,16 +381,12 @@ vreg_l3j_0p8: ldo3 {
>>>>   	};
>>>>   };
>>>>   
>>>> -&iris {
>>>> -	status = "okay";
>>>> -};
>>>
>>> Why?
>>
>> Purwa has a slightly different Iris hw version (8.1.2 on Hamoa, 8.1.11 on Purwa)
>> which I would assume is slighly weaker, plus there's probably a freqtbl change
>>
>> Let's take this as-is and enable it later
> 
> => commit message, please.

Will do.

> 
>>
>> +Vikash, Dikshita this seems like a really low-hanging fruit, could you take
>> a look at Purwa support in Iris?
>>
>> Konrad
> 

-- 
Best Regards,
Yijie