Re: [PATCH v8 2/5] iio: adc: ltc2378: Add support for LTC2378-20 and similar ADCs

[Jonathan Cameron <jic23@kernel.org>]

On Fri, 24 Jul 2026 11:40:11 -0300
Marcelo Schmitt <marcelo.schmitt1@gmail.com> wrote:

> On 07/23, sashiko-bot@kernel.org wrote:
> > Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> > - [Medium] The IIO scale factor exported for the LTC2338-18 is incorrect due to an unaccounted internal resistor divider (missing 2.5x multiplier).
> > --
> > 
> > --- Patch [2]: [PATCH v8 2/5] iio: adc: ltc2378: Add support for LTC2378-20 and similar ADCs ---
> > commit 79bd7cc98e49057401d7fb8d26685b9092c4787e
> > Author: Marcelo Schmitt <marcelo.schmitt@analog.com>
> > 
> > iio: adc: ltc2378: Add support for LTC2378-20 and similar ADCs
> > 
> > Support for LTC2378-20 and similar analog-to-digital converters.
> >   
> > > diff --git a/drivers/iio/adc/ltc2378.c b/drivers/iio/adc/ltc2378.c
> > > new file mode 100644
> > > index 0000000000000..107388f870626
> > > --- /dev/null
> > > +++ b/drivers/iio/adc/ltc2378.c  
> > [ ... ]  
> > > +static const struct ltc2378_chip_info ltc2338_18_chip_info = {
> > > +	.name = "ltc2338-18",
> > > +	.internal_ref_uV = 2048000,
> > > +	.chan = LTC2378_DIFF_CHANNEL(18),
> > > +};  
> > 
> > [Severity: Medium]
> > Does this chip info need a field to indicate the scale multiplier?
> > 
> > The LTC2338-18 has an internal resistor divider which acts as a 2.5x multiplier,
> > but this struct doesn't currently contain a way to specify it.  
> 
> I guess it makes sense. Might split support for this specific part into a
> separate patch to avoid it holding on the rest of the series in v9.

Works for me. 

J
>