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ath9k_hw: add some comments for ath9k_set_power_network_sleep()

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Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez 2010-04-15 17:38:16 -04:00 • committed by John W. Linville
parent e041228fed
commit bbd79af563
1 changed files with 10 additions and 0 deletions
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10
drivers/net/wireless/ath/ath9k/hw.c
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@ -2036,6 +2036,11 @@ static void ath9k_set_power_sleep(struct ath_hw *ah, int setChip)
}
}
/*
* Notify Power Management is enabled in self-generating
* frames. If request, set power mode of chip to
* auto/normal. Duration in units of 128us (1/8 TU).
*/
static void ath9k_set_power_network_sleep(struct ath_hw *ah, int setChip)
{
REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
@ -2043,9 +2048,14 @@ static void ath9k_set_power_network_sleep(struct ath_hw *ah, int setChip)
struct ath9k_hw_capabilities *pCap = &ah->caps;
if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
/* Set WakeOnInterrupt bit; clear ForceWake bit */
REG_WRITE(ah, AR_RTC_FORCE_WAKE,
AR_RTC_FORCE_WAKE_ON_INT);
} else {
/*
* Clear the RTC force wake bit to allow the
* mac to go to sleep.
*/
REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE,
AR_RTC_FORCE_WAKE_EN);
}