linux-kernel - Re: [PATCH v3] arm64: dts: qcom: qcs615: add WiFi/BT nodes

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Message-ID: <7107275e-1ccf-4f09-ada3-e082833d9364@oss.qualcomm.com>
Date: Fri, 6 Dec 2024 13:16:13 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: "Yu Zhang (Yuriy)" <quic_yuzha@...cinc.com>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>, andersson@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Cc: agross@...nel.org, ath11k@...ts.infradead.org, dmitry.baryshkov@...aro.org,
        konradybcio@...nel.org, kvalo@...nel.org, linux-media@...r.kernel.org,
        mchehab@...nel.org, quic_jjohnson@...cinc.com,
        quic_miaoqing@...cinc.com, quic_vgarodia@...cinc.com,
        stanimir.k.varbanov@...il.com, quic_jiaymao@...cinc.com
Subject: Re: [PATCH v3] arm64: dts: qcom: qcs615: add WiFi/BT nodes

On 6.12.2024 4:22 AM, Yu Zhang (Yuriy) wrote:
> 
> 
> On 12/6/2024 1:14 AM, Konrad Dybcio wrote:
>> On 3.12.2024 7:03 AM, Yu Zhang(Yuriy) wrote:
>>> Add a node for the PMU module of the WCN6855 present on the qcs615
>>> board. Assign its LDO power outputs to the existing WiFi/BT module.
>>>
>>
>> subject:
>>
>> arm64: dts: qcom: qcs615-ride: ....
>>
>> [...]
>>
>>> +
>>> +    vreg_conn_1p8: vreg_conn_1p8 {
>>> +        compatible = "regulator-fixed";
>>> +        regulator-name = "vreg_conn_1p8";
>>> +        startup-delay-us = <4000>;
>>> +        enable-active-high;
>>> +        gpio = <&pm8150_gpios 1 GPIO_ACTIVE_HIGH>;
>>> +    };
>>> +
>>> +    vreg_conn_pa: vreg_conn_pa {
>>> +        compatible = "regulator-fixed";
>>> +        regulator-name = "vreg_conn_pa";
>>> +        startup-delay-us = <4000>;
>>> +        enable-active-high;
>>> +        gpio = <&pm8150_gpios 6 GPIO_ACTIVE_HIGH>;
>>> +    };
>>
>> Are any of these boot-on?
>>
> Yes, these are used wcn6855-pmu：
>      vddio-supply = <&vreg_conn_pa>;
>      vddpmu-supply = <&vreg_conn_1p8>;

What i meant is, whether these regulators are enabled at boot
time (i.e. without software intervention). If that's the case,
`regulator-boot-on;` should be added

Konrad