Re: [PATCH] iio: sx9310: Fix semtech,avg-pos-strength setting when > 16

[Stephen Boyd]

Quoting Doug Anderson (2020-11-20 10:16:28)
> 
> Checking the math for the documented possible values of pos.  What we want:
> 
> 0 => 0
> 16 => 1
> 64 => 2
> 128 => 3
> 256 => 4
> 512 => 5
> 1024 => 6
> 4294967295 => 7
> 
> So looks OK.  Do we care about anything other than the documented
> numbers?  If my understanding of ilog2 is correct, then you'll get the
> wrong answer for 17.  I think you could fix it with:
> 
> pos = min(max(ilog2(pos), 3), 11) - (pos >= 32 ? 4 : 3);
> 

I don't think we really care about the rounding but to be consistent
with the first two it is better to do that. I'll send a fix.