diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 2cf4bbc5d30f4feb183bce09fbeaf3327e88c5fa..7ac234f0b1c59a1db2e5e76772d5d934545c32c7 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -730,6 +730,21 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
 }
 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 860739a8a6dde429d637e27202df78509342fb71..c47898d47c8a8993b27ccea60e57ac9e8def71c3 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -143,6 +143,7 @@ int regmap_update_bits(struct regmap *map, unsigned int reg,
 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);
 void regcache_cache_only(struct regmap *map, bool enable);