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mac80211: ath9k: Increase allowed antenna gain to 6 dBi

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FCC allows maximum antenna gain of 6 dBi. 15.247(b)(4):

> (4) The conducted output power limit
> specified in paragraph (b) of this section
> is based on the use of antennas
> with directional gains that do not exceed
> 6 dBi. Except as shown in paragraph
> (c) of this section, if transmitting
> antennas of directional gain greater
> than 6 dBi are used, the conducted
> output power from the intentional radiator
> shall be reduced below the stated
> values in paragraphs (b)(1), (b)(2),
> and (b)(3) of this section, as appropriate,
> by the amount in dB that the
> directional gain of the antenna exceeds
> 6 dBi.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
This commit is contained in:
Sven Eckelmann 2019-06-11 14:46:28 +02:00 committed by Christian Lamparter
parent e00e6fa90e
commit 01142665b7
1 changed files with 3 additions and 3 deletions
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6
package/kernel/mac80211/patches/ath/365-ath9k-adjust-tx-power-reduction-for-US-regulatory-do.patch
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@ -3,7 +3,7 @@ Date: Wed, 19 Jul 2017 08:49:31 +0200
Subject: [PATCH] ath9k: adjust tx power reduction for US regulatory
domain
FCC regulatory rules allow for up to 3 dBi antenna gain. Account for
FCC regulatory rules allow for up to 6 dBi antenna gain. Account for
this in the EEPROM based tx power reduction code.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
@ -15,9 +15,9 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
if (ant_gain > max_gain)
ant_reduction = ant_gain - max_gain;
+ /* FCC allows maximum antenna gain of 3 dBi */
+ /* FCC allows maximum antenna gain of 6 dBi */
+ if (reg->region == NL80211_DFS_FCC)
+ ant_reduction = max_t(int, ant_reduction - 6, 0);
+ ant_reduction = max_t(int, ant_reduction - 12, 0);
+
ah->eep_ops->set_txpower(ah, chan, ctl,
ant_reduction, new_pwr, test);