Re: [PATCH v1 02/13] iio: chemical: bme680: avoid using camel case

Vasileios Aoiridis
2024-10-11T18:50:31Z

On Fri, Oct 11, 2024 at 01:00:33PM +0300, Andy Shevchenko wrote:
> On Thu, Oct 10, 2024 at 11:00:19PM +0200, vamoirid wrote:
> > From: Vasileios Amoiridis <vassilisamir@gmail.com>
> >
> > Rename camel case variable, as checkpatch.pl complains.
>
> With given reply to the first patch...
>

Hi Andy,

> ...
>
> > /* Look up table for the possible gas range values */
> > - static const u32 lookupTable[16] = {2147483647u, 2147483647u,
> > + static const u32 lookup_table[16] = {2147483647u, 2147483647u,
> > 2147483647u, 2147483647u, 2147483647u,
> > 2126008810u, 2147483647u, 2130303777u,
> > 2147483647u, 2147483647u, 2143188679u,
>
> ...here is the opportunity to fix indentation while at fixing the code.
> I.o.w. I would reformat the entire table to be
>
> static const u32 lookup_table[16] = {
> 2147483647u, 2147483647u, 2147483647u, 2147483647u,
> 2147483647u, 2126008810u, 2147483647u, 2130303777u,
> 2147483647u, 2147483647u, 2143188679u, ...
>
> (also note power-of-2 number of items per line which much easier to read and
> find one you need).
>

ACK.

> ...
>
> > var1 = ((1340 + (5 * (s64)calib->range_sw_err)) *
> > - ((s64)lookupTable[gas_range])) >> 16;
> > + ((s64)lookup_table[gas_range])) >> 16;
>
> Also an opportunity to make this neater like
>
> var1 = (1340 + (5 * (s64)calib->range_sw_err)) * (s64)lookup_table[gas_range]);
> var1 >>= 16;
>
> So, at bare minumym there are redundant parentheses. And looking at the table
> and the first argument of multiplication I'm puzzled why casting is needed for
> the second? Shouldn't s64 already be implied by the first one?
>
> --
> With Best Regards,
> Andy Shevchenko
>
>

I think the 2nd cast indeed is not needed since the 1st one forces the
s64 so I can remove it.

Cheers,
Vasilis