linux-kernel - Re: [PATCH] iio: admv1013: add mixer

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Date:   Mon, 28 Aug 2023 19:07:09 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Nuno Sá <noname.nuno@...il.com>
Cc:     Antoniu Miclaus <antoniu.miclaus@...log.com>,
        krzysztof.kozlowski+dt@...aro.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: admv1013: add mixer_vgate corner cases

On Tue, 08 Aug 2023 08:32:51 +0200
Nuno Sá <noname.nuno@...il.com> wrote:

> On Mon, 2023-08-07 at 17:38 +0300, Antoniu Miclaus wrote:
> > Include the corner cases in the computation of the MIXER_VGATE register
> > value.
> > 
> > According to the datasheet: The MIXER_VGATE values follows the VCM such
> > as, that for a 0V to 1.8V VCM, MIXER_VGATE = 23.89 VCM + 81, and for a >
> > 1.8V to 2.6V VCM, MIXER_VGATE = 23.75 VCM + 1.25.
> > 
> > Fixes: da35a7b526d9 ("iio: frequency: admv1013: add support for ADMV1013")
> > Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
> > ---  
> 
> Reviewed-by: Nuno Sa <nuno.sa@...log.com>
Applied to the fixes-togreg branch of iio.git and marked for stable.
Was a but of fuzz due to other fixes but I would be surprised if that was
a problem.

Thanks,

Jonathan

> 
> >  drivers/iio/frequency/admv1013.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/iio/frequency/admv1013.c
> > b/drivers/iio/frequency/admv1013.c
> > index 9bf8337806fc..df29f1216b9a 100644
> > --- a/drivers/iio/frequency/admv1013.c
> > +++ b/drivers/iio/frequency/admv1013.c
> > @@ -348,9 +348,9 @@ static int admv1013_update_mixer_vgate(struct
> > admv1013_state *st)
> >  
> >         vcm = regulator_get_voltage(st->reg);
> >  
> > -       if (vcm < 1800000)
> > +       if (vcm <= 1800000)
> >                 mixer_vgate = (2389 * vcm / 1000000 + 8100) / 100;
> > -       else if (vcm > 1800000 && vcm < 2600000)
> > +       else if (vcm > 1800000 && vcm <= 2600000)
> >                 mixer_vgate = (2375 * vcm / 1000000 + 125) / 100;
> >         else
> >                 return -EINVAL;  
>