Re: [wireless-regdb] [PATCH] wireless-regdb: Update regulatory rules for Brazil (BR)

[Seth Forshee <sforshee@kernel.org>]

On Fri, Sep 02, 2022 at 07:21:50PM -0300, Cesar Eduardo Barros wrote:
> Em 02/09/2022 11:53, Johannes Berg escreveu:
> > On Thu, 2022-09-01 at 20:27 -0300, Cesar Eduardo Barros wrote:
> > > 
> > > +	# This range ends at 5725 MHz, but channel 144 extends to 5730 MHz.
> > > +	# Since 5725 ~ 5730 MHz belongs to the next range which has looser
> > > +	# requirements, we can extend the range by 5 MHz to make the kernel
> > > +	# happy and be able to use channel 144.
> > > +	(5470 - 5730 @ 160), (27), DFS
> > > +	(5730 - 5850 @ 80), (30)
> > > 
> > 
> > If you do the latter as 160 as well, and add AUTO-BW, couldn't you split
> > them at 5725 correctly? But I guess it doesn't matter anyway.
> 
> This was copied from the US rules (including the four-line comment), which
> have an identical split. If AUTO-BW worked here, I'd expect the US rules to
> use it.

AUTO-BW would work, and we have countries using it for this case. Iirc
for some countries we move the split to 5730 because even though
5725-5730 is at a lower power limit the rules allow channel 144 to be
used at the power limit for 5710-5725. For the US though I think it's
just historical -- it was done that way initially, and it isn't
important enough that anyone has cared to change it.

But we do generally try to keep the rules matching the official
documents as much as possible, so for new rules we should split at 5725
and use AUTO-BW as Johannes suggested. Could you send a v2 with that
change?

Thanks,
Seth