linux-kernel - Re: [PATCH] arm64: dts: qcom: qdu/qru1000-idp: Fix the voltage setting

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Message-ID: <4bd22d28-63d9-d700-2a0c-eb08ceb66a9c@quicinc.com>
Date: Mon, 20 May 2024 17:49:04 +0530
From: Komal Bajaj <quic_kbajaj@...cinc.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>
CC: Melody Olvera <quic_molvera@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: qdu/qru1000-idp: Fix the voltage
 setting



On 5/17/2024 2:20 PM, Krzysztof Kozlowski wrote:
> On 16/05/2024 07:52, Komal Bajaj wrote:
>>
>>
>> On 5/14/2024 6:57 PM, Krzysztof Kozlowski wrote:
>>> On 14/05/2024 15:10, Komal Bajaj wrote:
>>>> Fixing the regulator voltages for qdu/qru1000 idp boards.
>>>> In particular -
>>>> - smps4 is 1.574V min and 2.04V max
>>>> - smps5 is 1.2V min and 1.4V max
>>>> - smps6 is 0.382V min and 1.12V max
>>>
>>> Wait, why? This looks, at least partially, you are changing from fixed
>>> voltage choice to full range, without clear explanation.
>>>
>>
>> When we started using one of these regulators for USB enablement as sent
>> in the patch series [1], we saw a sudden reboot.
>> After adding more debug logs, came to know the configuration for smps5
>> was incorrect.
>>
>> Therefore, cross verified the configurations for all the regulators and
>> got to know that these are incorrectly configured.
>> This fixes some manual errors introduced in the initial patch (mentioned
>> in fixes tag).
>>
>> [1]
>> https://lore.kernel.org/linux-arm-msm/20240502090326.21489-1-quic_kbajaj@quicinc.com/
> 
> All this should be explained in commit msg.

Got it. Will add all this info into the commit message of the next version.

Thanks
Komal

> 
> Best regards,
> Krzysztof
> 
>