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Message-ID: <5c7409df-692c-4f22-aea6-56865e801a30@kernel.org>
Date: Fri, 17 May 2024 10:50:50 +0200
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Subject: Re: [PATCH] arm64: dts: qcom: qdu/qru1000-idp: Fix the voltage
 setting
To: Komal Bajaj <quic_kbajaj@quicinc.com>,
 Bjorn Andersson <andersson@kernel.org>,
 Konrad Dybcio <konrad.dybcio@linaro.org>, Rob Herring <robh@kernel.org>,
 Krzysztof Kozlowski <krzk+dt@kernel.org>, Conor Dooley <conor+dt@kernel.org>
Cc: Melody Olvera <quic_molvera@quicinc.com>, linux-arm-msm@vger.kernel.org,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20240514131038.28036-1-quic_kbajaj@quicinc.com>
 <45e0aee9-87d5-434f-8ffe-d3270def0f72@kernel.org>
 <1c214d8b-9c59-7266-4c80-4b548ad6c7f9@quicinc.com>
From: Krzysztof Kozlowski <krzk@kernel.org>
Content-Language: en-US
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In-Reply-To: <1c214d8b-9c59-7266-4c80-4b548ad6c7f9@quicinc.com>
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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.

Best regards,
Krzysztof