regmap: merge regmap_fields_update_bits() into macro

This patch merges regmap_fields_update_bits() into macro
by using regmap_field_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

@@ -1760,32 +1760,6 @@ int regmap_fields_force_write(struct regmap_field *field, unsigned int id,
 }
 EXPORT_SYMBOL_GPL(regmap_fields_force_write);
 
-/**
- * regmap_fields_update_bits():	Perform a read/modify/write cycle
- *                              on the register field
- *
- * @field: Register field to write to
- * @id: port ID
- * @mask: Bitmask to change
- * @val: Value to be written
- *
- * A value of zero will be returned on success, a negative errno will
- * be returned in error cases.
- */
-int regmap_fields_update_bits(struct regmap_field *field,  unsigned int id,
-			      unsigned int mask, unsigned int val)
-{
-	if (id >= field->id_size)
-		return -EINVAL;
-
-	mask = (mask << field->shift) & field->mask;
-
-	return regmap_update_bits(field->regmap,
-				  field->reg + (field->id_offset * id),
-				  mask, val << field->shift);
-}
-EXPORT_SYMBOL_GPL(regmap_fields_update_bits);
-
 /*
  * regmap_bulk_write(): Write multiple registers to the device
  *

include/linux/regmap.h

@@ -81,6 +81,8 @@ struct reg_sequence {
 
 #define	regmap_fields_write(field, id, val) \
 	regmap_fields_update_bits_base(field, id, ~0, val, NULL, false, false)
+#define	regmap_fields_update_bits(field, id, mask, val)\
+	regmap_fields_update_bits_base(field, id, mask, val, NULL, false, false)
 
 #ifdef CONFIG_REGMAP
 
@@ -787,8 +789,6 @@ int regmap_fields_force_write(struct regmap_field *field, unsigned int id,
 			unsigned int val);
 int regmap_fields_read(struct regmap_field *field, unsigned int id,
 		       unsigned int *val);
-int regmap_fields_update_bits(struct regmap_field *field,  unsigned int id,
-			      unsigned int mask, unsigned int val);
 int regmap_fields_update_bits_base(struct regmap_field *field,  unsigned int id,
 				   unsigned int mask, unsigned int val,
 				   bool *change, bool async, bool force);