linux-kernel - Re: [PATCH v3 4/4] arm64: dts: qcom: Add base HAMOA-IOT-EVK board

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Message-ID: <d14b2a0c-8304-497f-a662-5b93dbaaa1ed@oss.qualcomm.com>
Date: Tue, 29 Jul 2025 10:37:58 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: 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 v3 4/4] arm64: dts: qcom: Add base HAMOA-IOT-EVK board

On 7/29/25 7:51 AM, Yijie Yang wrote:
> 
> 
> On 2025-07-29 09:32, Yijie Yang wrote:
>> The HAMOA-IOT-EVK is an evaluation platform for IoT products, composed of
>> the Hamoa IoT SoM and a carrier board. Together, they form a complete
>> embedded system capable of booting to UART.
>>
>> This change enables and overlays the following peripherals on the carrier
>> board:
>> - UART
>> - On-board regulators
>> - USB Type-C mux
>> - Pinctrl
>> - Embedded USB (EUSB) repeaters
>> - NVMe
>> - pmic-glink
>> - USB DisplayPorts
>>
>> Written with contributions from Shuai Zhang (added Bluetooth) and Yongxing
>> Mou (added USB DisplayPorts).
>>
>> Signed-off-by: Yijie Yang <yijie.yang@....qualcomm.com>
>> ---

[...]>> +    vreg_wcn_3p3: regulator-wcn-3p3 {
>> +        compatible = "regulator-fixed";
>> +
>> +        regulator-name = "VREG_WCN_3P3";
>> +        regulator-min-microvolt = <3300000>;
>> +        regulator-max-microvolt = <3300000>;
>> +
>> +        gpio = <&tlmm 214 GPIO_ACTIVE_HIGH>;
>> +        enable-active-high;
>> +
>> +        pinctrl-0 = <&wcn_sw_en>;
>> +        pinctrl-names = "default";
>> +
>> +        regulator-boot-on;
> 
> It should be set to 'regulator-always-on'.

Are you sure? Turning off Wi-Fi sounds like a valid usecase..

Konrad