diff options
| author | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2013-12-24 12:15:41 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-06 19:22:16 (GMT) |
| commit | 0880e59a45b2ac82dbaaf0cbed9075ae5ce134bf (patch) | |
| tree | 695bb4faa03c28c5ee10c5138f91ac0fa00e4346 /drivers/net/wireless/iwlwifi/iwl-prph.h | |
| parent | 67d98b4f53e5509e912be53046088f332d6734e1 (diff) | |
| download | linux-fsl-qoriq-0880e59a45b2ac82dbaaf0cbed9075ae5ce134bf.tar.xz | |
iwlwifi: pcie: enable oscillator for L1 exit
commit 2d93aee152b1758a94a18fe15d72153ba73b5679 upstream.
Enabling the oscillator consumes slightly more power (100uA)
but allows to make sure that we exit from L1 on time.
Not doing so might lead to a PCIe specification violation
since we might wake up from L1 at the wrong time.
This issue has been identified on 3160 and 7260 only.
On older NICs L1 off is not enabled, on newer NICs (7265),
the issue is fixed.
When the bug occurs the user sees that the NIC has
disappeared from the PCI bridge, any access to the device
returns 0xff.
This fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=64541
and has been extensively discussed here:
http://markmail.org/thread/mfmpzqt3r333n4bo
Fixes: 99cd47142399 ("iwlwifi: add 7000 series device configuration")
Reported-and-tested-by: wzyboy <wzyboy@wzyboy.org>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-prph.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-prph.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-prph.h b/drivers/net/wireless/iwlwifi/iwl-prph.h index ff8cc75..4e6dfba 100644 --- a/drivers/net/wireless/iwlwifi/iwl-prph.h +++ b/drivers/net/wireless/iwlwifi/iwl-prph.h @@ -272,4 +272,8 @@ static inline unsigned int SCD_QUEUE_STATUS_BITS(unsigned int chnl) /*********************** END TX SCHEDULER *************************************/ +/* Oscillator clock */ +#define OSC_CLK (0xa04068) +#define OSC_CLK_FORCE_CONTROL (0x8) + #endif /* __iwl_prph_h__ */ |