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

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Message-ID: <96c23434-cd3a-4fca-a3ae-45be6ff850c5@oss.qualcomm.com>
Date: Wed, 21 Jan 2026 18:40:15 +0530
From: Vikash Garodia <vikash.garodia@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        YijieYang <yijie.yang@....qualcomm.com>,
        Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
        Wangao Wang <wangao.wang@....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,
        Renjiang Han <renjiang.han@....qualcomm.com>
Subject: Re: [PATCH v3 3/4] arm64: dts: qcom: Add PURWA-IOT-SOM platform


On 1/13/2026 4:59 PM, 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
> 
> +Vikash, Dikshita this seems like a really low-hanging fruit, could you take
> a look at Purwa support in Iris?

video should leverage most from hamoa, infact Wangao have validated iris 
on purwa very recently.

+Wangao to list the changes he made to bring it up

> 
> Konrad