PCI: host-generic: Rename and export gen_pci_init() for PCIe controller drivers

Rename gen_pci_init() API as pci_host_common_ecam_create() and export it to
allow the PCIe controller drivers to create and configure the ECAM region.

Note that this API should only used by the drivers managing the drvdata on
their own. Rest should continue using pci_host_common_init() API.

Signed-off-by: Mayank Rana <[email protected]>
[mani: commit message rewording]
Signed-off-by: Manivannan Sadhasivam <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: Mayank Rana

drivers/pci/controller/pci-host-common.c

@@ -22,7 +22,7 @@ static void gen_pci_unmap_cfg(void *ptr)
 	pci_ecam_free((struct pci_config_window *)ptr);
 }
 
-static struct pci_config_window *gen_pci_init(struct device *dev,
+struct pci_config_window *pci_host_common_ecam_create(struct device *dev,
 		struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops)
 {
 	int err;
@@ -50,6 +50,7 @@ static struct pci_config_window *gen_pci_init(struct device *dev,
 
 	return cfg;
 }
+EXPORT_SYMBOL_GPL(pci_host_common_ecam_create);
 
 int pci_host_common_init(struct platform_device *pdev,
 			 const struct pci_ecam_ops *ops)
@@ -65,7 +66,7 @@ int pci_host_common_init(struct platform_device *pdev,
 	of_pci_check_probe_only();
 
 	/* Parse and map our Configuration Space windows */
-	cfg = gen_pci_init(dev, bridge, ops);
+	cfg = pci_host_common_ecam_create(dev, bridge, ops);
 	if (IS_ERR(cfg))
 		return PTR_ERR(cfg);
 

drivers/pci/controller/pci-host-common.h

@@ -17,4 +17,6 @@ int pci_host_common_init(struct platform_device *pdev,
 			 const struct pci_ecam_ops *ops);
 void pci_host_common_remove(struct platform_device *pdev);
 
+struct pci_config_window *pci_host_common_ecam_create(struct device *dev,
+	struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops);
 #endif