ath9k_hw: make bluetooth coexistence support optional at compile time

Many systems (e.g. embedded systems) do not have wifi modules connected to
bluetooth modules, so bluetooth coexistence is irrelevant there. With the
addition of MCI support, ath9k picked up quite a bit of extra code that
can be compiled out this way.

This patch redefines ATH9K_HW_CAP_MCI and adds an inline wrapper for
querying the bluetooth coexistence scheme, allowing the compiler to
eliminate code that uses it, with only very little use of #ifdef.

On MIPS this reduces the total size for the modules by about 20k.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
index b7c030018403..6506e1fd5036 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
@@ -115,6 +115,9 @@ void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)
 {
         struct ath_btcoex *btcoex = &priv->btcoex;
 
+        if (ath9k_hw_get_btcoex_scheme(priv->ah) == ATH_BTCOEX_CFG_NONE)
+                return;
+
         btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
         btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
                 btcoex->btcoex_period / 100;
@@ -133,6 +136,9 @@ void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
         struct ath_btcoex *btcoex = &priv->btcoex;
         struct ath_hw *ah = priv->ah;
 
+        if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE)
+                return;
+
         ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n");
 
         btcoex->bt_priority_cnt = 0;
@@ -147,6 +153,9 @@ void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
  */
 void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv)
 {
+        if (ath9k_hw_get_btcoex_scheme(priv->ah) == ATH_BTCOEX_CFG_NONE)
+                return;
+
         cancel_delayed_work_sync(&priv->coex_period_work);
         cancel_delayed_work_sync(&priv->duty_cycle_work);
 }