Re: [RFC v2] cfg80211: VHT regulatory

[Mahesh Palivela <maheshp@posedge.com>]

On 09/07/2012 05:40 PM, Johannes Berg wrote:
>
> We don't have to do any calculation in kernel though as far as I can
> tell? Maybe we do need the channel, but I think in terms of
> *specifying*, in particular in the nl80211 and cfg80211 APIs, we should
> stick to the standard if we're going to change it now.
>

struct ieee80211_channel_config {
         enum ieee80211_chan_width chan_width;
         u16 center_freq1;
         u16 center_freq2;
         u16 prim_chan_freq;
};

If we stick to standard, all u16 become u8, as their values range is 
from 1-200. But these numbers have to be converted to freqKHz in 
reg_chan_use_permitted() to find fits in reg rule or not?
Is that ok?

If so I have to use below formulas to get freqKHz.

Channel center frequency [MHz]
= Channel starting frequency + 5 x dot11CurrentChannelCenterFrequencyIndex

Primary 20 MHz channel center frequency [MHz]
= Channel starting frequency + 5  dot11CurrentPrimaryChannel

Thanks,
Mahesh