diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-prph.h | 4 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/pcie/trans.c | 16 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-prph.h b/drivers/net/wireless/iwlwifi/iwl-prph.h index 386f2a7c87c..c26a6dc21ee 100644 --- a/drivers/net/wireless/iwlwifi/iwl-prph.h +++ b/drivers/net/wireless/iwlwifi/iwl-prph.h @@ -260,4 +260,8 @@ 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__ */ diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index aeb70e13137..95ed2a676d7 100644 --- a/drivers/net/wireless/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/iwlwifi/pcie/trans.c @@ -207,6 +207,22 @@ static int iwl_pcie_apm_init(struct iwl_trans *trans) } /* + * Enable the oscillator to count wake up time for L1 exit. This + * consumes slightly more power (100uA) - but allows to be sure + * that we wake up from L1 on time. + * + * This looks weird: read twice the same register, discard the + * value, set a bit, and yet again, read that same register + * just to discard the value. But that's the way the hardware + * seems to like it. + */ + iwl_read_prph(trans, OSC_CLK); + iwl_read_prph(trans, OSC_CLK); + iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL); + iwl_read_prph(trans, OSC_CLK); + iwl_read_prph(trans, OSC_CLK); + + /* * Enable DMA clock and wait for it to stabilize. * * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits |