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Linville" , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , b43-dev@lists.infradead.org (open list:B43 WIRELESS DRIVER), linux-kernel@vger.kernel.org (open list) Subject: [PATCH wireless] wifi: b43: load the N-PHY SPROM power limits for the current band Date: Thu, 15 Oct 2026 14:54:23 -0700 Message-ID: <20261015215423.195788-1-rosenp@gmail.com> X-Mailer: git-send-email 2.56.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit b43_nphy_op_recalc_txpower() always builds the per-rate power limits from the 2.4 GHz SPROM entries (maxpwr_2g, ofdm2gpo, mcs2gpo), even on 5 GHz channels. The resulting maximum then overrides the per-band target b43_nphy_tx_power_ctl_setup() reads from the SPROM, so 5 GHz transmits aim at the 2.4 GHz limit. Pick the SPROM band from the current channel, splitting 5 GHz the same way b43_nphy_tx_power_ctl_setup() does. Fixes: 8615eb2870f1 ("b43: N-PHY: support setting custom TX power") Assisted-by: LLM Signed-off-by: Rosen Penev --- drivers/net/wireless/broadcom/b43/phy_n.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/b43/phy_n.c b/drivers/net/wireless/broadcom/b43/phy_n.c index 22359bd9db47..a8dc7c12a5a9 100644 --- a/drivers/net/wireless/broadcom/b43/phy_n.c +++ b/drivers/net/wireless/broadcom/b43/phy_n.c @@ -5833,6 +5833,7 @@ static enum b43_txpwr_result b43_nphy_op_recalc_txpower(struct b43_wldev *dev, struct b43_phy_n *nphy = dev->phy.n; struct ieee80211_channel *channel = dev->wl->hw->conf.chandef.chan; struct b43_ppr *ppr = &nphy->tx_pwr_max_ppr; + enum b43_band band; u8 max; /* qdBm */ if (nphy->tx_pwr_last_recalc_freq == channel->center_freq && @@ -5843,7 +5844,15 @@ static enum b43_txpwr_result b43_nphy_op_recalc_txpower(struct b43_wldev *dev, b43_ppr_clear(dev, ppr); /* HW limitations */ - b43_ppr_load_max_from_sprom(dev, ppr, B43_BAND_2G); + if (b43_current_band(dev->wl) == NL80211_BAND_2GHZ) + band = B43_BAND_2G; + else if (channel->center_freq < 5100) + band = B43_BAND_5G_LO; + else if (channel->center_freq < 5500) + band = B43_BAND_5G_MI; + else + band = B43_BAND_5G_HI; + b43_ppr_load_max_from_sprom(dev, ppr, band); /* Regulatory & user settings */ max = INT_TO_Q52(phy->chandef->chan->max_power); -- 2.56.0