Re: [PATCH v2 2/2] iio: potentiometer: Add driver support for AD5110

[Andy Shevchenko]

On Wed, Aug 11, 2021 at 11:15 AM Lars-Peter Clausen <lars@xxxxxxxxxx> wrote:
> On 8/10/21 2:49 PM, Andy Shevchenko wrote:
> >
> >> +       data->tol = data->cfg->kohms * (val & GENMASK(6, 0)) * 10 / 8;
> >> +       if (!(val & BIT(7)))
> >> +               data->tol *= -1;
> > Shouldn't you simple use corresponding sign_extend*()?
> The data is encoded a sign-magnitude. sign_extend() works for two's
> complement numbers.

Good catch!
I'm wondering if it's a good idea to have a sign_magnitude_to_int()
helper or so?

-- 
With Best Regards,
Andy Shevchenko