regmap: merge regmap_update_bits_async() into macro

Current regmap has many similar update functions like below,
but the difference is very few.
	regmap_update_bits()
	regmap_update_bits_async()
	regmap_update_bits_check()
	regmap_update_bits_check_async()
Furthermore, we can add *force* write option too in the future.

This patch merges regmap_update_bits_async() into macro
by using regmap_update_bits_base().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/base/regmap/regmap.c

@@ -2710,40 +2710,6 @@ int regmap_write_bits(struct regmap *map, unsigned int reg,
 }
 EXPORT_SYMBOL_GPL(regmap_write_bits);
 
-/**
- * regmap_update_bits_async: Perform a read/modify/write cycle on the register
- *                           map asynchronously
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- *
- * With most buses the read must be done synchronously so this is most
- * useful for devices with a cache which do not need to interact with
- * the hardware to determine the current register value.
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_update_bits_async(struct regmap *map, unsigned int reg,
-			     unsigned int mask, unsigned int val)
-{
-	int ret;
-
-	map->lock(map->lock_arg);
-
-	map->async = true;
-
-	ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
-
-	map->async = false;
-
-	map->unlock(map->lock_arg);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_update_bits_async);
-
 /**
  * regmap_update_bits_check: Perform a read/modify/write cycle on the
  *                           register map and report if updated

include/linux/regmap.h

@@ -67,6 +67,8 @@ struct reg_sequence {
 
 #define	regmap_update_bits(map, reg, mask, val) \
 	regmap_update_bits_base(map, reg, mask, val, NULL, false, false)
+#define	regmap_update_bits_async(map, reg, mask, val)\
+	regmap_update_bits_base(map, reg, mask, val, NULL, true, false)
 
 #ifdef CONFIG_REGMAP
 
@@ -699,8 +701,6 @@ int regmap_update_bits_base(struct regmap *map, unsigned int reg,
 			    bool *change, bool async, bool force);
 int regmap_write_bits(struct regmap *map, unsigned int reg,
 		       unsigned int mask, unsigned int val);
-int regmap_update_bits_async(struct regmap *map, unsigned int reg,
-			     unsigned int mask, unsigned int val);
 int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 			     unsigned int mask, unsigned int val,
 			     bool *change);
@@ -956,14 +956,6 @@ static inline int regmap_write_bits(struct regmap *map, unsigned int reg,
 	return -EINVAL;
 }
 
-static inline int regmap_update_bits_async(struct regmap *map,
-					   unsigned int reg,
-					   unsigned int mask, unsigned int val)
-{
-	WARN_ONCE(1, "regmap API is disabled");
-	return -EINVAL;
-}
-
 static inline int regmap_update_bits_check(struct regmap *map,
 					   unsigned int reg,
 					   unsigned int mask, unsigned int val,