diff options
| author | Mohammed Shafi Shajakhan <mshajakhan@atheros.com> | 2010-11-23 20:42:27 +0530 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-11-30 13:49:13 -0500 |
| commit | ea066d5a91f2610116dcd27054f749e4f07799d8 (patch) | |
| tree | 451eb5ad15da0cf8c401dded725fe0f3838beb48 /drivers/net/wireless/ath/ath9k/main.c | |
| parent | dd318575ff0aae91ac4cbcc5b60c184e59267212 (diff) | |
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>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/main.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/main.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 50bdb5db23b4..df1bfcfeb734 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -554,9 +554,12 @@ void ath_update_chainmask(struct ath_softc *sc, int is_ht) static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta) { struct ath_node *an; - + struct ath_hw *ah = sc->sc_ah; an = (struct ath_node *)sta->drv_priv; + if ((ah->caps.hw_caps) & ATH9K_HW_CAP_APM) + sc->sc_flags |= SC_OP_ENABLE_APM; + if (sc->sc_flags & SC_OP_TXAGGR) { ath_tx_node_init(sc, an); an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + |