[PATCH 04/11] regmap: factor out regmap cdev size calculation

[Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>]

We will add a new user of this calculate in a follow-up commit, so
make it available as a global function.

Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
 drivers/base/regmap/regmap.c | 9 +++++++--
 include/regmap.h             | 2 ++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 3685226dd1d5..40aefa1bea27 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -401,6 +401,12 @@ static struct cdev_operations regmap_fops = {
 	.write	= regmap_cdev_write,
 };
 
+size_t regmap_size_bytes(struct regmap *map)
+{
+	return regmap_round_val_bytes(map) * (map->max_register + 1) /
+		map->reg_stride;
+}
+
 /*
  * regmap_register_cdev - register a devfs file for a regmap
  *
@@ -428,8 +434,7 @@ int regmap_register_cdev(struct regmap *map, const char *name)
 			map->cdev.name = xstrdup(dev_name(map->dev));
 	}
 
-	map->cdev.size = regmap_round_val_bytes(map) * (map->max_register + 1) /
-			map->reg_stride;
+	map->cdev.size = regmap_size_bytes(map);
 	map->cdev.dev = map->dev;
 	map->cdev.ops = &regmap_fops;
 
diff --git a/include/regmap.h b/include/regmap.h
index 8f191c87cfcb..986ed391ab28 100644
--- a/include/regmap.h
+++ b/include/regmap.h
@@ -204,6 +204,8 @@ static inline int regmap_clear_bits(struct regmap *map,
 	return regmap_update_bits(map, reg, bits, 0);
 }
 
+size_t regmap_size_bytes(struct regmap *map);
+
 /**
  * regmap_read_poll_timeout - Poll until a condition is met or a timeout occurs
  *
-- 
2.30.2