diff --git a/meta-ast2400/recipes-kernel/linux/linux-obmc/defconfig b/meta-ast2400/recipes-kernel/linux/linux-obmc/defconfig
index 05819c6..34b733d 100644
--- a/meta-ast2400/recipes-kernel/linux/linux-obmc/defconfig
+++ b/meta-ast2400/recipes-kernel/linux/linux-obmc/defconfig
@@ -143,6 +143,9 @@
 CONFIG_RTC_DRV_DS1307=y
 CONFIG_RTC_DRV_ASPEED=y
 # CONFIG_IOMMU_SUPPORT is not set
+CONFIG_FSI=y
+CONFIG_FSI_MASTER_GPIO=y
+CONFIG_FSI_SCOM=y
 CONFIG_FIRMWARE_MEMMAP=y
 CONFIG_FANOTIFY=y
 CONFIG_AUTOFS4_FS=y
diff --git a/meta-ast2500/recipes-kernel/linux/linux-obmc/defconfig b/meta-ast2500/recipes-kernel/linux/linux-obmc/defconfig
index ab6f91b..2b4b33a 100644
--- a/meta-ast2500/recipes-kernel/linux/linux-obmc/defconfig
+++ b/meta-ast2500/recipes-kernel/linux/linux-obmc/defconfig
@@ -147,6 +147,9 @@
 CONFIG_RTC_DRV_DS1307=y
 CONFIG_RTC_DRV_ASPEED=y
 # CONFIG_IOMMU_SUPPORT is not set
+CONFIG_FSI=y
+CONFIG_FSI_MASTER_GPIO=y
+CONFIG_FSI_SCOM=y
 CONFIG_FIRMWARE_MEMMAP=y
 CONFIG_FANOTIFY=y
 CONFIG_AUTOFS4_FS=y