Return-path: Received: from wolverine01.qualcomm.com ([199.106.114.254]:29285 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751319Ab2F2GjW (ORCPT ); Fri, 29 Jun 2012 02:39:22 -0400 From: Rajkumar Manoharan To: CC: , Rajkumar Manoharan Subject: [PATCH 4/5] ath9k: fix power consumption on network sleep when BTCOEX is enabled Date: Fri, 29 Jun 2012 12:10:08 +0530 Message-ID: <1340952009-12223-4-git-send-email-rmanohar@qca.qualcomm.com> (sfid-20120629_083925_278602_15DC54AB) In-Reply-To: <1340952009-12223-1-git-send-email-rmanohar@qca.qualcomm.com> References: <1340952009-12223-1-git-send-email-rmanohar@qca.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-wireless-owner@vger.kernel.org List-ID: The chip is waken up for every 45ms in btcoex timer cycle to for sharing the radio between BT and WLAN. Whenever the wlan interface is in network sleep mode, do not schedule hw timers. This could reduce power consumption on idle associated state. Signed-off-by: Rajkumar Manoharan --- drivers/net/wireless/ath/ath9k/gpio.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/gpio.c b/drivers/net/wireless/ath/ath9k/gpio.c index 9ae6a4d..c17168e 100644 --- a/drivers/net/wireless/ath/ath9k/gpio.c +++ b/drivers/net/wireless/ath/ath9k/gpio.c @@ -194,6 +194,16 @@ static void ath_btcoex_period_timer(unsigned long data) struct ath_mci_profile *mci = &btcoex->mci; u32 timer_period; bool is_btscan; + unsigned long flags; + + spin_lock_irqsave(&sc->sc_pm_lock, flags); + if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) { + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + if (btcoex->hw_timer_enabled) + ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); + goto skip_hw_wakeup; + } + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); ath9k_ps_wakeup(sc); if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) @@ -232,6 +242,7 @@ static void ath_btcoex_period_timer(unsigned long data) } ath9k_ps_restore(sc); +skip_hw_wakeup: timer_period = btcoex->btcoex_period; mod_timer(&btcoex->period_timer, jiffies + msecs_to_jiffies(timer_period)); } -- 1.7.11.1