openwrt/package/kernel/mac80211/patches/ath9k/365-ath9k-adjust-tx-power-reduction-for-US-regulatory-do.patch
Hauke Mehrtens e185080c87 mac80211: Update to version 5.11.22-1
The removed patches were applied upstream.
This backports version 5.11.22 and later does not support kernel
versions < 4.4, this allows us to remove some patches too.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2021-10-23 23:17:23 +02:00

25 lines
761 B
Diff

From: Felix Fietkau <nbd@nbd.name>
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 6 dBi antenna gain. Account for
this in the EEPROM based tx power reduction code.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2995,6 +2995,10 @@ void ath9k_hw_apply_txpower(struct ath_h
if (ant_gain > max_gain)
ant_reduction = ant_gain - max_gain;
+ /* FCC allows maximum antenna gain of 6 dBi */
+ if (reg->region == NL80211_DFS_FCC)
+ ant_reduction = max_t(int, ant_reduction - 12, 0);
+
ah->eep_ops->set_txpower(ah, chan, ctl,
ant_reduction, new_pwr, test);
}