1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/btcoex.c b/drivers/net/wireless/ath/ath9k/btcoex.c
index e8bfb01ee78a..55f607b7699e 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.c
+++ b/drivers/net/wireless/ath/ath9k/btcoex.c
@@ -19,6 +19,29 @@
 static const struct ath_btcoex_config ath_bt_config = { 0, true, true,
                         ATH_BT_COEX_MODE_SLOTTED, true, true, 2, 5, true };
 
+static const u16 ath_subsysid_tbl[] = {
+        AR9280_COEX2WIRE_SUBSYSID,
+        AT9285_COEX3WIRE_SA_SUBSYSID,
+        AT9285_COEX3WIRE_DA_SUBSYSID
+};
+
+/*
+ * Checks the subsystem id of the device to see if it
+ * supports btcoex
+ */
+bool ath_btcoex_supported(u16 subsysid)
+{
+        int i;
+
+        if (!subsysid)
+                return false;
+
+        for (i = 0; i < ARRAY_SIZE(ath_subsysid_tbl); i++)
+                if (subsysid == ath_subsysid_tbl[i])
+                        return true;
+
+        return false;
+}
 
 /*
  * Detects if there is any priority bt traffic