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Re: [PATCH v2 13/20] cfg80211: Add nl80211 antenna configuration

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On Tue, May 18, 2010 at 6:31 PM, Bruno Randolf <br1@xxxxxxxxxxx> wrote:

> + * @NL80211_ATTR_ANTENNA_TX: Bitmap of antennas to use for transmitting.
> + * @NL80211_ATTR_ANTENNA_RX: Bitmap of antennas to use for receiving.

This gets the job done, but that's it. The API defined allows for a
hugely loose implementation on each driver. Users could end up using
for ath5k:

iw dev wlan0 set_tx_antenna 1 # for AR5K_ANTMODE_FIXED_A
iw dev wlan0 set_tx_antenna 2 # for AR5K_ANTMODE_FIXED_B
iw dev wlan0 set_tx_antenna 3 # for AR5K_ANTMODE_DEFAULT

And yet for another driver it could be something completely different
in usersepace. I think it would be better for us to define a static
API for all legacy cards and another for 802.11n cards, or unify them
but to be very specific about the API for antenna settings/chainmask
settings.

  Luis
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