dm: pci: Add a function to get the BDF for a device

It is useful to be able to find the full PCI address (bus, device and
function) for a PCI device. Add a function to provide this.

Adjust the existing code to use this.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/pci/pci-uclass.c

@@ -30,6 +30,14 @@ struct pci_controller *pci_bus_to_hose(int busnum)
 	return dev_get_uclass_priv(bus);
 }
 
+pci_dev_t pci_get_bdf(struct udevice *dev)
+{
+	struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
+	struct udevice *bus = dev->parent;
+
+	return PCI_ADD_BUS(bus->seq, pplat->devfn);
+}
+
 /**
  * pci_get_bus_max() - returns the bus number of the last active bus
  *
@@ -295,19 +303,14 @@ int pci_auto_config_devices(struct udevice *bus)
 	for (ret = device_find_first_child(bus, &dev);
 	     !ret && dev;
 	     ret = device_find_next_child(&dev)) {
-		struct pci_child_platdata *pplat;
 		struct pci_controller *ctlr_hose;
-
-		pplat = dev_get_parent_platdata(dev);
 		unsigned int max_bus;
-		pci_dev_t bdf;
 
-		bdf = PCI_ADD_BUS(bus->seq, pplat->devfn);
 		debug("%s: device %s\n", __func__, dev->name);
 
 		/* The root controller has the region information */
 		ctlr_hose = hose->ctlr->uclass_priv;
-		max_bus = pciauto_config_device(ctlr_hose, bdf);
+		max_bus = pciauto_config_device(ctlr_hose, pci_get_bdf(dev));
 		sub_bus = max(sub_bus, max_bus);
 	}
 	debug("%s: done\n", __func__);

drivers/pci/pci_compat.c

@@ -31,13 +31,9 @@ PCI_HOSE_OP(write, dword, 32, u32)
 
 pci_dev_t pci_find_devices(struct pci_device_id *ids, int index)
 {
-	struct pci_child_platdata *pplat;
-	struct udevice *bus, *dev;
+	struct udevice *dev;
 
 	if (pci_find_device_id(ids, index, &dev))
 		return -1;
-	bus = dev->parent;
-	pplat = dev_get_parent_platdata(dev);
-
-	return PCI_ADD_BUS(bus->seq, pplat->devfn);
+	return pci_get_bdf(dev);
 }

include/pci.h

@@ -808,6 +808,14 @@ struct dm_pci_ops {
 #define pci_get_ops(dev)	((struct dm_pci_ops *)(dev)->driver->ops)
 
 /**
+ * pci_get_bdf() - Get the BDF value for a device
+ *
+ * @dev:	Device to check
+ * @return bus/device/function value (see PCI_BDF())
+ */
+pci_dev_t pci_get_bdf(struct udevice *dev);
+
+/**
  * pci_bind_bus_devices() - scan a PCI bus and bind devices
  *
  * Scan a PCI bus looking for devices. Bind each one that is found. If