regmap: add regmap_update_bits_base()

[deliverable/linux.git] / drivers / base / regmap / regmap.c

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ee54e841de4ad69c96ecb7897ddc04e889e8c702..4e35b2f4130421c2b1953c0d69eab6ec05904189 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2647,6 +2647,46 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
        return ret;
 }
 
+/**
+ * regmap_update_bits_base:
+ *     Perform a read/modify/write cycle on the
+ *     register map with change, async, force option
+ *
+ * @map: Register map to update
+ * @reg: Register to update
+ * @mask: Bitmask to change
+ * @val: New value for bitmask
+ * @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
+ *
+ * if async was true,
+ * 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_base(struct regmap *map, unsigned int reg,
+                           unsigned int mask, unsigned int val,
+                           bool *change, bool async, bool force)
+{
+       int ret;
+
+       map->lock(map->lock_arg);
+
+       map->async = async;
+
+       ret = _regmap_update_bits(map, reg, mask, val, change, force);
+
+       map->async = false;
+
+       map->unlock(map->lock_arg);
+
+       return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_update_bits_base);
+
 /**
  * regmap_update_bits: Perform a read/modify/write cycle on the register map
  *