Re: [PATCH v6 1/2] iio: sx9310: Fix access to variable DT array

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On Mon, Mar 22, 2021 at 3:29 PM Andy Shevchenko
<andy.shevchenko@xxxxxxxxx> wrote:
>
> On Mon, Mar 22, 2021 at 1:16 PM Alexandru Ardelean
> <ardeleanalex@xxxxxxxxx> wrote:
> > On Mon, Mar 22, 2021 at 9:33 AM Gwendal Grignou <gwendal@xxxxxxxxxxxx> wrote:
>
> ...
>
> > but i think there may be a bug, in the fact that number of elements in
> > the array must be 4 (no more, no less)
> > that is, when reading the DT, it implies a variable array size of 1 to
> > 4, which doesn't seem true in the code;
> >
> > maybe a better idea would be to use of_property_read_***variable***_u32_array()
> > this would allow for a flexible array size;
>
> Wouldn't work in conjunction with the second patch.
> The above API is OF specific.

oh
good point

>
> >                count = of_property_read_variable_u32_array(np,
> > "semtech,combined-sensors",
> >                                            combined, 1,
> > ARRAY_SIZE(combined));   // min 1 , max 4 elements
> >                // count must be int, so that if it is negative, the
> > array doesn't loop;
> >                 for (i = 0; i < count; i++) {
> >                         if (combined[i] <= SX9310_NUM_CHANNELS)
> >                                 comb_mask |= BIT(combined[i]);
> >                 }
> >
>
> --
> With Best Regards,
> Andy Shevchenko



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