RE: [PATCH v6 2/2] iio: adc: max14001: New driver

[Paller, Kim Seer]

> -----Original Message-----
> From: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> Sent: Wednesday, June 14, 2023 5:12 PM
> To: Paller, Kim Seer <KimSeer.Paller@xxxxxxxxxx>
> Cc: jic23@xxxxxxxxxx; lars@xxxxxxxxxx; lgirdwood@xxxxxxxxx;
> broonie@xxxxxxxxxx; Hennerich, Michael <Michael.Hennerich@xxxxxxxxxx>;
> robh@xxxxxxxxxx; krzysztof.kozlowski@xxxxxxxxxx; conor+dt@xxxxxxxxxx; linux-
> iio@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH v6 2/2] iio: adc: max14001: New driver
> 
> [External]
> 
> On Wed, Jun 14, 2023 at 3:49 AM Kim Seer Paller
> <kimseer.paller@xxxxxxxxxx> wrote:
> >
> > The MAX14001 is configurable, isolated 10-bit ADCs for multi-range
> > binary inputs.
> 
> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> One question
> below.
> 
> > Signed-off-by: Kim Seer Paller <kimseer.paller@xxxxxxxxxx>
> > ---

...
 
> > +               /* select external voltage reference source for the ADC */
> > +               ret = max14001_reg_update(st, MAX14001_CFG,
> > +                                         MAX14001_CFG_EXRF, 1);
> > +
> > +               ret = regulator_get_voltage(vref);
> > +               if (ret < 0)
> > +                       return dev_err_probe(dev, ret,
> > +                                            "Failed to get vref\n");
> 
> Is it important to choose the external reference source _before_ getting the
> voltage of the regulator? If not, I would swap these calls, otherwise the
> comment is needed to explain why the sequence is important in the way it's
> written.

It is not important. These calls can be swap without any issues.

Best regards,
Kim Seer Paller