ath9k: Add support for Adaptive Power Management
This feature is to mitigate the problem of certain 3
stream chips that exceed the PCIe power requirements.An EEPROM flag
controls which chips have APM enabled which is basically read from
miscellaneous configuration element of the EEPROM header.
This workaround will reduce power consumption by using 2 Tx chains for
Single and Double stream rates (5 GHz only).All self generated frames
(regardless of rate) are sent on 2 chains when this feature is
enabled(Chip Limitation).
Cc: Paul Shaw <paul.shaw@atheros.com>
Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Tested-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 6f90acc..efba413 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -544,6 +544,7 @@
#define SC_OP_BT_PRIORITY_DETECTED BIT(12)
#define SC_OP_BT_SCAN BIT(13)
#define SC_OP_ANI_RUN BIT(14)
+#define SC_OP_ENABLE_APM BIT(15)
/* Powersave flags */
#define PS_WAIT_FOR_BEACON BIT(0)
@@ -695,6 +696,8 @@
void ath9k_ps_wakeup(struct ath_softc *sc);
void ath9k_ps_restore(struct ath_softc *sc);
+u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate);
+
void ath9k_set_bssid_mask(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
int ath9k_wiphy_add(struct ath_softc *sc);
int ath9k_wiphy_del(struct ath_wiphy *aphy);