diff --git a/target/linux/realtek/rtl838x/config-6.6 b/target/linux/realtek/rtl838x/config-6.6
index 58c15f7bb0..3a2dbae8c1 100644
--- a/target/linux/realtek/rtl838x/config-6.6
+++ b/target/linux/realtek/rtl838x/config-6.6
@@ -128,9 +128,11 @@ CONFIG_LIBFDT=y
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
 CONFIG_MACH_REALTEK_RTL=y
 CONFIG_MARVELL_PHY=y
+CONFIG_MDIO_BITBANG=y
 CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y
 CONFIG_MDIO_DEVRES=y
+CONFIG_MDIO_GPIO=y
 CONFIG_MDIO_I2C=y
 CONFIG_MDIO_REALTEK_OTTO_AUX=y
 CONFIG_MDIO_SMBUS=y