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| author | Grumbach, Emmanuel <emmanuel.grumbach@intel.com> | 2010-11-18 03:47:38 -0800 |
|---|---|---|
| committer | Wey-Yi Guy <wey-yi.w.guy@intel.com> | 2010-12-02 08:35:02 -0800 |
| commit | e7cad69cdab4d6f0caadbcdd58b54214243ba98a (patch) | |
| tree | 693e9ee779a7cee5e3ba07b044ed1040d05b3051 /drivers/net/wireless/iwlwifi/iwl-agn-ucode.c | |
| parent | 40b97c2fe96a476f1c228345f0c6a2d135a8b226 (diff) | |
| download | kernel_samsung_smdk4412-e7cad69cdab4d6f0caadbcdd58b54214243ba98a.tar.gz kernel_samsung_smdk4412-e7cad69cdab4d6f0caadbcdd58b54214243ba98a.tar.bz2 kernel_samsung_smdk4412-e7cad69cdab4d6f0caadbcdd58b54214243ba98a.zip | |
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 <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-ucode.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-ucode.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c b/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c index 0bdd2bb0bbd..24dabcd2a36 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); |