ath9k_htc: add new WMI_REG_RMW_CMDID command

Since usb bus add extra delay on each request, a command
with read + write requests is too expensive. We can dramtically
reduce usb load by moving this command to firmware.

In my tests, this patch will reduce channel scan time
for about 5-10 seconds.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index aaec9451de49..7b51d8e3696f 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -100,6 +100,18 @@
                         (_ah)->reg_ops.write_flush((_ah));      \
         } while (0)
 
+#define ENABLE_REG_RMW_BUFFER(_ah)                                      \
+        do {                                                            \
+                if ((_ah)->reg_ops.enable_rmw_buffer)   \
+                        (_ah)->reg_ops.enable_rmw_buffer((_ah)); \
+        } while (0)
+
+#define REG_RMW_BUFFER_FLUSH(_ah)                                       \
+        do {                                                            \
+                if ((_ah)->reg_ops.rmw_flush)           \
+                        (_ah)->reg_ops.rmw_flush((_ah));        \
+        } while (0)
+
 #define PR_EEP(_s, _val)                                                \
         do {                                                            \
                 len += scnprintf(buf + len, size - len, "%20s : %10d\n",\