From: Grumbach, Emmanuel Date: Thu, 18 Nov 2010 11:47:38 +0000 (-0800) Subject: iwlagn: Enable PCI L1 ACTIVE state after uCode has been loaded X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e7cad69cdab4d6f0caadbcdd58b54214243ba98a;p=linux-beck.git 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 --- 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);