ath9k: Enable TSF Out of Range Interrupt

This patch lays the groundwork for handling TSF Out of Range
interrupt, which will be used for power save later on.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 7d7537e2738e..32cdb246a8f2 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -574,6 +574,10 @@ irqreturn_t ath_isr(int irq, void *dev)
                                         sc->sc_flags |= SC_OP_WAIT_FOR_BEACON;
                                 }
                         }
+                        if (status & ATH9K_INT_TSFOOR) {
+                                /* FIXME: Handle this interrupt for power save */
+                                sched = true;
+                        }
                 }
         } while (0);
 
@@ -2165,10 +2169,13 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
          * Enable MIB interrupts when there are hardware phy counters.
          * Note we only do this (at the moment) for station mode.
          */
-        if (ath9k_hw_phycounters(sc->sc_ah) &&
-            ((conf->type == NL80211_IFTYPE_STATION) ||
-             (conf->type == NL80211_IFTYPE_ADHOC)))
-                sc->imask |= ATH9K_INT_MIB;
+        if ((conf->type == NL80211_IFTYPE_STATION) ||
+            (conf->type == NL80211_IFTYPE_ADHOC)) {
+                if (ath9k_hw_phycounters(sc->sc_ah))
+                        sc->imask |= ATH9K_INT_MIB;
+                sc->imask |= ATH9K_INT_TSFOOR;
+        }
+
         /*
          * Some hardware processes the TIM IE and fires an
          * interrupt when the TIM bit is set.  For hardware