From e7cad69cdab4d6f0caadbcdd58b54214243ba98a Mon Sep 17 00:00:00 2001 From: "Grumbach, Emmanuel" Date: Thu, 18 Nov 2010 03:47:38 -0800 Subject: iwlagn: Enable PCI L1 ACTIVE state after uCode has been loaded PCI L1 Active needs to be disabled while loading the uCode so that the bus doesn't go to sleep. The enablement of L1 Active should be done after the uCode has sent the ALIVE response. The enablement of L1 Active was missing. Enabling L1 Active allows to save power if the BIOS / bus driver allows it. I measured the power consumption while not associated and idle/associated: L1 Active disabled: 39 mA = 130mW L1 Active enabled: 6 mA = 20 mW Signed-off-by: Emmanuel Grumbach Signed-off-by: Wey-Yi Guy --- drivers/net/wireless/iwlwifi/iwl-agn-ucode.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers') diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c b/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c index 0bdd2bb0bbd3..24dabcd2a36c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c @@ -531,6 +531,10 @@ int iwlagn_alive_notify(struct iwl_priv *priv) spin_unlock_irqrestore(&priv->lock, flags); + /* Enable L1-Active */ + iwl_clear_bits_prph(priv, APMG_PCIDEV_STT_REG, + APMG_PCIDEV_STT_VAL_L1_ACT_DIS); + iwlagn_send_wimax_coex(priv); iwlagn_set_Xtal_calib(priv); -- cgit v1.2.1