diff --git a/src/soc/intel/cannonlake/fsp_params.c b/src/soc/intel/cannonlake/fsp_params.c
index 3cc426a942..0f27c47bac 100644
--- a/src/soc/intel/cannonlake/fsp_params.c
+++ b/src/soc/intel/cannonlake/fsp_params.c
@@ -18,6 +18,7 @@
 #include <device/pci.h>
 #include <fsp/api.h>
 #include <fsp/util.h>
+#include <intelblocks/lpss.h>
 #include <intelblocks/xdci.h>
 #include <intelpch/lockdown.h>
 #include <soc/intel/common/vbt.h>
@@ -446,3 +447,10 @@ __weak void mainboard_silicon_init_params(FSP_S_CONFIG *params)
 {
 	printk(BIOS_DEBUG, "WEAK: %s/%s called\n", __FILE__, __func__);
 }
+
+/* Return list of SOC LPSS controllers */
+const pci_devfn_t *soc_lpss_controllers_list(size_t *size)
+{
+	*size = ARRAY_SIZE(serial_io_dev);
+	return serial_io_dev;
+}
diff --git a/src/soc/intel/icelake/fsp_params.c b/src/soc/intel/icelake/fsp_params.c
index ce162ef40f..e31e47bf57 100644
--- a/src/soc/intel/icelake/fsp_params.c
+++ b/src/soc/intel/icelake/fsp_params.c
@@ -18,6 +18,7 @@
 #include <device/pci.h>
 #include <fsp/api.h>
 #include <fsp/util.h>
+#include <intelblocks/lpss.h>
 #include <intelblocks/xdci.h>
 #include <soc/intel/common/vbt.h>
 #include <soc/pci_devs.h>
@@ -45,6 +46,21 @@ static void parse_devicetree(FSP_S_CONFIG *params)
 		params->SerialIoUartMode[i] = config->SerialIoUartMode[i];
 }
 
+static const pci_devfn_t serial_io_dev[] = {
+	PCH_DEVFN_I2C0,
+	PCH_DEVFN_I2C1,
+	PCH_DEVFN_I2C2,
+	PCH_DEVFN_I2C3,
+	PCH_DEVFN_I2C4,
+	PCH_DEVFN_I2C5,
+	PCH_DEVFN_GSPI0,
+	PCH_DEVFN_GSPI1,
+	PCH_DEVFN_GSPI2,
+	PCH_DEVFN_UART0,
+	PCH_DEVFN_UART1,
+	PCH_DEVFN_UART2
+};
+
 /* UPD parameters to be initialized before SiliconInit */
 void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 {
@@ -229,3 +245,10 @@ __weak void mainboard_silicon_init_params(FSP_S_CONFIG *params)
 {
 	printk(BIOS_DEBUG, "WEAK: %s/%s called\n", __FILE__, __func__);
 }
+
+/* Return list of SOC LPSS controllers */
+const pci_devfn_t *soc_lpss_controllers_list(size_t *size)
+{
+	*size = ARRAY_SIZE(serial_io_dev);
+	return serial_io_dev;
+}