dm: pci: Move pci_bus_to_hose() to compatibility

This function should not be used by driver-model code, so move it to the
compatibility portion.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

drivers/pci/pci-uclass.c

@@ -22,7 +22,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-static int pci_get_bus(int busnum, struct udevice **busp)
+int pci_get_bus(int busnum, struct udevice **busp)
 {
 	int ret;
 
@@ -41,20 +41,6 @@ static int pci_get_bus(int busnum, struct udevice **busp)
 	return ret;
 }
 
-struct pci_controller *pci_bus_to_hose(int busnum)
-{
-	struct udevice *bus;
-	int ret;
-
-	ret = pci_get_bus(busnum, &bus);
-	if (ret) {
-		debug("%s: Cannot get bus %d: ret=%d\n", __func__, busnum, ret);
-		return NULL;
-	}
-
-	return dev_get_uclass_priv(bus);
-}
-
 struct udevice *pci_get_controller(struct udevice *dev)
 {
 	while (device_is_on_pci_bus(dev))

drivers/pci/pci_compat.c

@@ -12,6 +12,7 @@
 #include <pci.h>
 #include <dm/device-internal.h>
 #include <dm/lists.h>
+#include "pci_internal.h"
 
 #define PCI_HOSE_OP(rw, name, size, type)				\
 int pci_hose_##rw##_config_##name(struct pci_controller *hose,		\
@@ -36,3 +37,17 @@ pci_dev_t pci_find_devices(struct pci_device_id *ids, int index)
 		return -1;
 	return dm_pci_get_bdf(dev);
 }
+
+struct pci_controller *pci_bus_to_hose(int busnum)
+{
+	struct udevice *bus;
+	int ret;
+
+	ret = pci_get_bus(busnum, &bus);
+	if (ret) {
+		debug("%s: Cannot get bus %d: ret=%d\n", __func__, busnum, ret);
+		return NULL;
+	}
+
+	return dev_get_uclass_priv(bus);
+}

drivers/pci/pci_internal.h

@@ -47,4 +47,16 @@ void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus);
  */
 int dm_pciauto_config_device(struct udevice *dev);
 
+/**
+ * pci_get_bus() - Get a pointer to a bus, given its number
+ *
+ * This looks up a PCI bus based on its bus number. The bus is probed if
+ * necessary.
+ *
+ * @busnum:	PCI bus number to look up
+ * @busp:	Returns PCI bus on success
+ * @return 0 on success, or -ve error
+ */
+int pci_get_bus(int busnum, struct udevice **busp);
+
 #endif