diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c
index 3cc4c70..a8ee52c 100644
--- a/drivers/mfd/tps65217.c
+++ b/drivers/mfd/tps65217.c
@@ -146,6 +146,8 @@
 static struct regmap_config tps65217_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
+
+	.max_register = TPS65217_REG_MAX,
 };
 
 static const struct of_device_id tps65217_of_match[] = {