regmap: core: Make raw write available to regcache

This allows the cache to sync values directly to the device when stored
in native format and also allows asynchronous I/O.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/base/regmap/internal.h

@@ -195,6 +195,9 @@ bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
 		      unsigned int val);
 int regcache_lookup_reg(struct regmap *map, unsigned int reg);
 
+int _regmap_raw_write(struct regmap *map, unsigned int reg,
+		      const void *val, size_t val_len, bool async);
+
 void regmap_async_complete_cb(struct regmap_async *async, int ret);
 
 extern struct regcache_ops regcache_rbtree_ops;

drivers/base/regmap/regmap.c

@@ -937,8 +937,8 @@ static int _regmap_select_page(struct regmap *map, unsigned int *reg,
 	return 0;
 }
 
-static int _regmap_raw_write(struct regmap *map, unsigned int reg,
-			     const void *val, size_t val_len, bool async)
+int _regmap_raw_write(struct regmap *map, unsigned int reg,
+		      const void *val, size_t val_len, bool async)
 {
 	struct regmap_range_node *range;
 	unsigned long flags;