diff --git a/src/soc/amd/stoneyridge/hda.c b/src/soc/amd/stoneyridge/hda.c
index b41b999925..1774a4abc6 100644
--- a/src/soc/amd/stoneyridge/hda.c
+++ b/src/soc/amd/stoneyridge/hda.c
@@ -28,10 +28,6 @@ static const unsigned short pci_device_ids[] = {
 	0
 };
 
-static void hda_init(struct device *dev)
-{
-}
-
 static struct pci_operations lops_pci = {
 	.set_subsystem = pci_dev_set_subsystem,
 };
@@ -40,8 +36,8 @@ static struct device_operations hda_audio_ops = {
 	.read_resources = pci_dev_read_resources,
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.init = hda_init,
-	.scan_bus = 0,
+	.init = NULL,
+	.scan_bus = NULL,
 	.ops_pci = &lops_pci,
 };
 
diff --git a/src/soc/amd/stoneyridge/sata.c b/src/soc/amd/stoneyridge/sata.c
index e2de3e6fdf..c1e54937bf 100644
--- a/src/soc/amd/stoneyridge/sata.c
+++ b/src/soc/amd/stoneyridge/sata.c
@@ -63,7 +63,7 @@ static struct device_operations sata_ops = {
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
 	.init = sata_init,
-	.scan_bus = 0,
+	.scan_bus = NULL,
 	.ops_pci = &lops_pci,
 };
 
diff --git a/src/soc/amd/stoneyridge/usb.c b/src/soc/amd/stoneyridge/usb.c
index c1caf7db4c..82984b9b82 100644
--- a/src/soc/amd/stoneyridge/usb.c
+++ b/src/soc/amd/stoneyridge/usb.c
@@ -26,16 +26,12 @@ static struct pci_operations lops_pci = {
 	.set_subsystem = pci_dev_set_subsystem,
 };
 
-static void usb_init(struct device *dev)
-{
-}
-
 static struct device_operations usb_ops = {
 	.read_resources = pci_ehci_read_resources,
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.init = usb_init,
-	.scan_bus = 0,
+	.init = NULL,
+	.scan_bus = NULL,
 	.ops_pci = &lops_pci,
 };