linux-kernel - Re: [RFC PATCH 2/4] regulator: core: Add regulator_map_voltage

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Date: Thu, 20 Jun 2024 16:48:10 +0100
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Wolfram Sang <wsa+renesas@...g-engineering.com>, Liam Girdwood <lgirdwood@...il.com>, 
	Mark Brown <broonie@...nel.org>, Magnus Damm <magnus.damm@...il.com>, linux-mmc@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-renesas-soc@...r.kernel.org, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, Biju Das <biju.das.jz@...renesas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [RFC PATCH 2/4] regulator: core: Add regulator_map_voltage_descend()
 API

Hi Geert,

Thank you for the review.

On Thu, Jun 20, 2024 at 3:52 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Wed, Jun 5, 2024 at 9:49 AM Prabhakar <prabhakar.csengg@...il.com> wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > Similarly to regulator_map_voltage_ascend() api add
> > regulator_map_voltage_descend() api and export it.
> >
> > Drivers that have descendant voltage list can use this as their
> > map_voltage() operation.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Thanks for your patch!
>
> > --- a/drivers/regulator/helpers.c
> > +++ b/drivers/regulator/helpers.c
> > @@ -368,6 +368,37 @@ int regulator_map_voltage_ascend(struct regulator_dev *rdev,
> >  }
> >  EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
> >
> > +/**
> > + * regulator_map_voltage_descend - map_voltage() for descendant voltage list
> > + *
> > + * @rdev: Regulator to operate on
> > + * @min_uV: Lower bound for voltage
> > + * @max_uV: Upper bound for voltage
> > + *
> > + * Drivers that have descendant voltage list can use this as their
> > + * map_voltage() operation.
> > + */
> > +int regulator_map_voltage_descend(struct regulator_dev *rdev,
> > +                                 int min_uV, int max_uV)
> > +{
> > +       int i, ret;
> > +
> > +       for (i = rdev->desc->n_voltages - 1; i >= 0 ; i--) {
> > +               ret = rdev->desc->ops->list_voltage(rdev, i);
> > +               if (ret < 0)
> > +                       continue;
> > +
> > +               if (ret > min_uV)
>
> I know this patch is superseded, but shouldn't this be "<"?
>
Agreed, thanks I missed that.

Cheers,
Prabhakar