ath9k_hw: add some comments for ath9k_set_power_network_sleep()
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index f140504..ea831f5 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2036,6 +2036,11 @@
}
}
+/*
+ * 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 @@
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);
}
