Re: [PATCH v3 10/10] iio: adc: ad7124: Implement temperature measurement

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On Mon, Nov 25, 2024 at 4:52 PM Uwe Kleine-König
<u.kleine-koenig@xxxxxxxxxxxx> wrote:
> On Mon, Nov 25, 2024 at 03:47:25PM +0200, Andy Shevchenko wrote:
> > On Mon, Nov 25, 2024 at 1:27 PM Uwe Kleine-König
> > <u.kleine-koenig@xxxxxxxxxxxx> wrote:
> > > On Fri, Nov 22, 2024 at 10:31:07PM +0200, Andy Shevchenko wrote:
> > > > On Fri, Nov 22, 2024 at 1:34 PM Uwe Kleine-König
> > > > <u.kleine-koenig@xxxxxxxxxxxx> wrote:
> > > > > +       /* Add one for temperature */
> > > > > +       st->num_channels = min(num_channels + 1, AD7124_MAX_CHANNELS);
> > > >
> > > > Is the type of both arguments the same?
> > >
> > > Hmm, my compiler is happy with it at least. I don't understand why
> > > though. I'll do a few more tests ...
> >
> > If num_channels is signed int or shorter than (independently on the
> > sign) int, then it's obvious why. + 1 makes it int.
>
> Ah indeed, I should have understood that without that explanation.

Yeah, but a closer look shows to me that num_channels is unsigned int
or did I look in the wrong place? If that's true, that should make a
warning appear since AD7124_MAX_CHANNELS is signed int...


-- 
With Best Regards,
Andy Shevchenko





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