diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
index 9ec951996588..5d5f816492aa 100644
--- a/drivers/mfd/mt6397-core.c
+++ b/drivers/mfd/mt6397-core.c
@@ -261,6 +261,9 @@ static const struct mfd_cell mt6359_devs[] = {
 
 static const struct mfd_cell mt6397_devs[] = {
 	{
+		.name = "mt6397-auxadc",
+		.of_compatible = "mediatek,mt6397-auxadc",
+	}, {
 		.name = "mt6397-rtc",
 		.num_resources = ARRAY_SIZE(mt6397_rtc_resources),
 		.resources = mt6397_rtc_resources,