PCI: cadence: Add module support for platform controller driver

Add support for building PCI cadence platforms as a module.

Signed-off-by: Manikandan K Pillai <mpillai@cadence.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20251108140305.1120117-2-hans.zhang@cixtech.com

Author: mpillai-cadence

drivers/pci/controller/cadence/Kconfig

@@ -19,10 +19,10 @@ config PCIE_CADENCE_EP
 	select PCIE_CADENCE
 
 config PCIE_CADENCE_PLAT
-	bool
+	tristate
 
 config PCIE_CADENCE_PLAT_HOST
-	bool "Cadence platform PCIe controller (host mode)"
+	tristate "Cadence platform PCIe controller (host mode)"
 	depends on OF
 	select PCIE_CADENCE_HOST
 	select PCIE_CADENCE_PLAT
@@ -32,7 +32,7 @@ config PCIE_CADENCE_PLAT_HOST
 	  vendors SoCs.
 
 config PCIE_CADENCE_PLAT_EP
-	bool "Cadence platform PCIe controller (endpoint mode)"
+	tristate "Cadence platform PCIe controller (endpoint mode)"
 	depends on OF
 	depends on PCI_ENDPOINT
 	select PCIE_CADENCE_EP

drivers/pci/controller/cadence/pcie-cadence-plat.c

@@ -177,4 +177,7 @@ static struct platform_driver cdns_plat_pcie_driver = {
 	.probe = cdns_plat_pcie_probe,
 	.shutdown = cdns_plat_pcie_shutdown,
 };
-builtin_platform_driver(cdns_plat_pcie_driver);
+module_platform_driver(cdns_plat_pcie_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cadence PCIe controller platform driver");

drivers/pci/controller/cadence/pcie-cadence.c

@@ -293,6 +293,7 @@ const struct dev_pm_ops cdns_pcie_pm_ops = {
 	NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq,
 				  cdns_pcie_resume_noirq)
 };
+EXPORT_SYMBOL_GPL(cdns_pcie_pm_ops);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Cadence PCIe controller driver");