ath9k_hw: add HTC init hardware call for special resets for AR9271

AR9271 needs a full reset only upon the first reset, add
a call for the driver to enable these special resets. We
can optimize this out later without an export.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 15 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 5bc5f5fdff57..05aeb511c686 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1951,6 +1951,7 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
 
         ath9k_hw_mark_phy_inactive(ah);
 
+        /* Only required on the first reset */
         if (AR_SREV_9271(ah) && ah->htc_reset_init) {
                 REG_WRITE(ah,
                           AR9271_RESET_POWER_DOWN_CONTROL,
@@ -1963,6 +1964,7 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
                 return -EINVAL;
         }
 
+        /* Only required on the first reset */
         if (AR_SREV_9271(ah) && ah->htc_reset_init) {
                 ah->htc_reset_init = false;
                 REG_WRITE(ah,
@@ -3857,6 +3859,16 @@ void ath_gen_timer_isr(struct ath_hw *ah)
 }
 EXPORT_SYMBOL(ath_gen_timer_isr);
 
+/********/
+/* HTC  */
+/********/
+
+void ath9k_hw_htc_resetinit(struct ath_hw *ah)
+{
+        ah->htc_reset_init = true;
+}
+EXPORT_SYMBOL(ath9k_hw_htc_resetinit);
+
 static struct {
         u32 version;
         const char * name;
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index e63edfb91590..6b03e1688b22 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -707,6 +707,9 @@ u32 ath9k_hw_gettsf32(struct ath_hw *ah);
 
 void ath9k_hw_name(struct ath_hw *ah, char *hw_name, size_t len);
 
+/* HTC */
+void ath9k_hw_htc_resetinit(struct ath_hw *ah);
+
 #define ATH_PCIE_CAP_LINK_CTRL  0x70
 #define ATH_PCIE_CAP_LINK_L0S   1
 #define ATH_PCIE_CAP_LINK_L1    2