linux-kernel - Re: [PATCH V4 1/6] dt-bindings: regulator: Add "regulator-min-dropout-voltage-microvolt"

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Date:   Mon, 6 Dec 2021 18:33:26 +0530
From:   "Satya Priya Kakitapalli (Temp)" <quic_c_skakit@...cinc.com>
To:     Mark Brown <broonie@...nel.org>
CC:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>, <swboyd@...omium.org>,
        <collinsd@...eaurora.org>, <subbaram@...eaurora.org>,
        Das Srinagesh <gurus@...eaurora.org>,
        <linux-arm-msm@...r.kernel.org>,
        "Lee Jones" <lee.jones@...aro.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V4 1/6] dt-bindings: regulator: Add
 "regulator-min-dropout-voltage-microvolt"


On 11/25/2021 8:47 PM, Mark Brown wrote:
> On Fri, Nov 19, 2021 at 03:12:28PM +0530, Satya Priya wrote:
>
>> +  regulator-min-dropout-voltage-microvolt:
>> +    description: Specifies the minimum voltage in microvolts that the
>> +      parent supply regulator must output, above the output of this regulator.
> Usually this is a fixed property of the regulator rather than something
> that varies per board - why have a DT property?


The min-dropout value (headroom) varies with boards, that's why we have 
a DT property for it. We overwrite the default value in driver with 
actual value read from DT