linux-kernel - Re: [PATCH v11 3/3] i2c: muxes: pca954x: Add regulator support

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Date:   Fri, 14 Apr 2023 14:01:09 +0200
From:   Patrick Rudolph <patrick.rudolph@...ements.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Peter Rosin <peda@...ntia.se>, Liam Girdwood <lgirdwood@...il.com>,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v11 3/3] i2c: muxes: pca954x: Add regulator support

Hi Mark,
It was using the normal regulator_get() in the last revision, but
Sergey requested to make it optional.
Please advise me what to do here? Who is right?

Regards,
Patrick

On Fri, Apr 14, 2023 at 1:47 PM Mark Brown <broonie@...nel.org> wrote:
>
> On Fri, Apr 14, 2023 at 01:01:36PM +0200, Patrick Rudolph wrote:
>
> > +     data->supply = devm_regulator_get_optional(dev, "vdd");
> > +     if (IS_ERR(data->supply)) {
> > +             ret = PTR_ERR(data->supply);
>
> Unless the device can work without power it should be using a normal
> regulator_get().