On Mon, 12 Nov 2018 07:57:24 +0000
"Ardelean, Alexandru" <alexandru.Ardelean@xxxxxxxxxx> wrote:
> On Sun, 2018-11-11 at 14:30 +0000, Jonathan Cameron wrote:
> > On Tue, 6 Nov 2018 09:24:44 +0000
> > "Ardelean, Alexandru" <alexandru.Ardelean@xxxxxxxxxx> wrote:
> >
> > > On Mon, 2018-11-05 at 17:14 -0200, Renato Lui Geh wrote:
> > > > The ad7780 driver previously did not read the correct device output,
> > > > as
> > > > it read an outdated value set at initialization. It now updates its
> > > > voltage on read.
> > > >
> >
> > Applied to the togreg branch of iio.git and pushed out as testing for
> > the autobuilders to check it. I'm not that fussed about pushing this
> > one as a fix, as most of the time these things are on fixed regulators
> > anyway, but it is nice to do it right.
> >
> > > Looks good from my side.
> >
> > Ack?
>
> Acked-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
Added to both in this series.
Thanks,
Jonathan
>
> >
> > Much preferred if you are willing to give a formal acknowledgement.
> >
> > Thanks,
> >
> > Jonathan
> >
> >
> > >
> > > Alex
> > >
> > > > Signed-off-by: Renato Lui Geh <renatogeh@xxxxxxxxx>
> > > > ---
> > > > Changes in v3:
> > > > - removed initialization (int voltage_uv = 0)
> > > > - returns error when voltage_uv is null
> > > > Changes in v4:
> > > > - returns error when voltage_uv is negative
> > > >
> > > > drivers/staging/iio/adc/ad7780.c | 6 +++++-
> > > > 1 file changed, 5 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/staging/iio/adc/ad7780.c
> > > > b/drivers/staging/iio/adc/ad7780.c
> > > > index b67412db0318..c7cb05cedbbc 100644
> > > > --- a/drivers/staging/iio/adc/ad7780.c
> > > > +++ b/drivers/staging/iio/adc/ad7780.c
> > > > @@ -87,12 +87,16 @@ static int ad7780_read_raw(struct iio_dev
> > > > *indio_dev,
> > > > long m)
> > > > {
> > > > struct ad7780_state *st = iio_priv(indio_dev);
> > > > + int voltage_uv;
> > > >
> > > > switch (m) {
> > > > case IIO_CHAN_INFO_RAW:
> > > > return ad_sigma_delta_single_conversion(indio_dev, chan,
> > > > val);
> > > > case IIO_CHAN_INFO_SCALE:
> > > > - *val = st->int_vref_mv * st->gain;
> > > > + voltage_uv = regulator_get_voltage(st->reg);
> > > > + if (voltage_uv < 0)
> > > > + return voltage_uv;
> > > > + *val = (voltage_uv / 1000) * st->gain;
> > > > *val2 = chan->scan_type.realbits - 1;
> > > > return IIO_VAL_FRACTIONAL_LOG2;
> > > > case IIO_CHAN_INFO_OFFSET:
> >
> >
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