ath9k_hw: add a new register op for read-mask-write

Reduces the number of calls to register ops. On MIPS this reduces the
ath9k_hw binary size from 321k down to 310k

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

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index 4e26946f7ab..ca69e7ccfd8 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -430,6 +430,17 @@ static void ath9k_regwrite_flush(void *hw_priv)
 	mutex_unlock(&priv->wmi->multi_write_mutex);
 }
 
+static u32 ath9k_reg_rmw(void *hw_priv, u32 reg_offset, u32 set, u32 clr)
+{
+	u32 val;
+
+	val = ath9k_regread(hw_priv, reg_offset);
+	val &= ~clr;
+	val |= set;
+	ath9k_regwrite(hw_priv, val, reg_offset);
+	return val;
+}
+
 static void ath_usb_read_cachesize(struct ath_common *common, int *csz)
 {
 	*csz = L1_CACHE_BYTES >> 2;
@@ -655,6 +666,7 @@ static int ath9k_init_priv(struct ath9k_htc_priv *priv,
 	ah->reg_ops.write = ath9k_regwrite;
 	ah->reg_ops.enable_write_buffer = ath9k_enable_regwrite_buffer;
 	ah->reg_ops.write_flush = ath9k_regwrite_flush;
+	ah->reg_ops.rmw = ath9k_reg_rmw;
 	priv->ah = ah;
 
 	common = ath9k_hw_common(ah);