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

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Date:   Tue, 4 Jan 2022 14:54:56 +0000
From:   Mark Brown <broonie@...nel.org>
To:     "Satya Priya Kakitapalli (Temp)" <quic_c_skakit@...cinc.com>
Cc:     David Collins <quic_collinsd@...cinc.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>, swboyd@...omium.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 Mon, Jan 03, 2022 at 08:05:40PM +0530, Satya Priya Kakitapalli (Temp) wrote:
> On 12/11/2021 2:41 AM, Mark Brown wrote:

> > I'd think we should consider if it's better to support this
> > dynamically at runtime based on load information and provide options for
> > configuring the peak load information through DT instead for static
> > configurations.  That would fit in with the stuff we have for managing
> > modes on DCDCs (which isn't really deployed but is there) and the API we
> > have for allowing client drivers to indicate their load requirements at
> > runtime that fits in with that.  That'd allow us to only boost the
> > headroom when it's really needed.

> This means Dynamic headroom control feature needs to be implemented. I need
> to explore more on this and gather info from team, Could we merge the
> present driver with "static headroom" for now? I'll do a follow up series to
> implement this feature.

I'd be happy to merge something with the headroom configured statically
in the driver like we do for other devices - I guess if you set the
highest headroom that should cover it.

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