diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index e3ee9ca..2f7c25c 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -844,6 +844,21 @@
 }
 EXPORT_SYMBOL_GPL(regmap_register_patch);
 
+/*
+ * regmap_get_val_bytes(): Report the size of a register value
+ *
+ * Report the size of a register value, mainly intended to for use by
+ * generic infrastructure built on top of regmap.
+ */
+int regmap_get_val_bytes(struct regmap *map)
+{
+	if (map->format.format_write)
+		return -EINVAL;
+
+	return map->format.val_bytes;
+}
+EXPORT_SYMBOL_GPL(regmap_get_val_bytes);
+
 static int __init regmap_initcall(void)
 {
 	regmap_debugfs_initcall();
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index bb13efc..398377d 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -156,6 +156,7 @@
 int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 			     unsigned int mask, unsigned int val,
 			     bool *change);
+int regmap_get_val_bytes(struct regmap *map);
 
 int regcache_sync(struct regmap *map);
 int regcache_sync_region(struct regmap *map, unsigned int min,