[ath9k-devel] ath9k: set 5/10 MHz supported channels

[Simon Wunderlich <sw@simonwunderlich.de>]

Hey Kamran,

for 2.4 GHz that's certainly possible, as those are 5 MHz spaced anyway.

For 5 GHz I don't know if it's possible. For example in ath9k, you could try 
to hack ath9k_5ghz_chantable, add more channels in 5 mhz spaces and try if it 
works. The driver says here:

/* Some 5 GHz radios are actually tunable on XXXX-YYYY
 * on 5 MHz steps, we support the channels which we know
 * we have calibration data for all cards though to make
 * this static */

I don't know if it works, please give it a try and report back. :)
   Simon

> Can I change the center of my 5/10MMHz channel so I can accommodated more
> than one channels in official 802.11 20Mhz channel? If not then is it for
> HW reason or b/c of driver?
> 
> On Mon, Nov 18, 2013 at 4:07 PM, Simon Wunderlich 
<sw@simonwunderlich.de>wrote:
> > Hey Tomas,
> > 
> > > > I still had a patch for iw on my disk which enables 5/10 MHz for the
> > 
> > "iw
> > 
> > > > join ibss" command, which I forgot to send. I've cleaned it up and
> > > > sent it to linux-wireless[1], so you can have a look.
> > > > 
> > > > Cheers,
> > > > 
> > > >      Simon
> > > > 
> > > > [1]
> > 
> > http://permalink.gmane.org/gmane.linux.kernel.wireless.general/115597
> > 
> > > > _______________________________________________
> > > > ath9k-devel mailing list
> > > > ath9k-devel at lists.ath9k.org
> > > > https://lists.ath9k.org/mailman/listinfo/ath9k-devel
> > > 
> > > Dear Simon,
> > > 
> > > thanks a lot for your immediate response. I looked at the patch you
> > > gave us. Can you tell us in what driver is this pacth applicable?
> > > I have tried mine but a lot of source code was missing.
> > > 
> > > Thank you in advance
> > > 
> > > Tomas
> > 
> > the patch is for the iw tool, Johannes has already merged it, so just
> > check out the latest trunk of iw[1]. It should work on recent kernels
> > (3.12 or mac80211-next) with ath5k and ath9k, but there was a reporting
> > problem[2] which forced us to disable the support for now. If you revert
> > the disabling patch [3] manually and understand that this may lead to an
> > incompatible kernel
> > you may still use it though, or use later kernels (or mac80211-next).
> > 
> > Cheers,
> > 
> >    Simon
> > 
> > [1] git clone http://git.kernel.org/?p=linux/kernel/git/jberg/iw.git
> > [2] http://permalink.gmane.org/gmane.linux.kernel.wireless.general/115842
> > [3] http://permalink.gmane.org/gmane.linux.kernel.wireless.general/115841
---
Mit freundlichen Gr??en / kind regards
Simon Wunderlich

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