PCI: cadence: Refactor driver to use as a core library

Cadence PCIe host and endpoint IP may be embedded into a variety of
SoCs/platforms. Let's extract the platform related APIs/Structures in the
current driver to a separate file (pcie-cadence-plat.c), such that the
common functionality can be used by future platforms.

Signed-off-by: Tom Joseph <tjoseph@cadence.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>

1 files changed, 23 insertions, 8 deletions

diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 70e078238899..b593616e9f52 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -28,23 +28,38 @@ config PCIE_CADENCE
 	bool
 
 config PCIE_CADENCE_HOST
-	bool "Cadence PCIe host controller"
+	bool
 	depends on OF
-	depends on PCI
 	select IRQ_DOMAIN
 	select PCIE_CADENCE
-	help
-	  Say Y here if you want to support the Cadence PCIe controller in host
-	  mode. This PCIe controller may be embedded into many different vendors
-	  SoCs.
 
 config PCIE_CADENCE_EP
-	bool "Cadence PCIe endpoint controller"
+	bool
 	depends on OF
 	depends on PCI_ENDPOINT
 	select PCIE_CADENCE
+
+config PCIE_CADENCE_PLAT
+	bool
+
+config PCIE_CADENCE_PLAT_HOST
+	bool "Cadence PCIe platform host controller"
+	depends on OF
+	select PCIE_CADENCE_HOST
+	select PCIE_CADENCE_PLAT
+	help
+	  Say Y here if you want to support the Cadence PCIe platform controller in
+	  host mode. This PCIe controller may be embedded into many different
+	  vendors SoCs.
+
+config PCIE_CADENCE_PLAT_EP
+	bool "Cadence PCIe platform endpoint controller"
+	depends on OF
+	depends on PCI_ENDPOINT
+	select PCIE_CADENCE_EP
+	select PCIE_CADENCE_PLAT
 	help
-	  Say Y here if you want to support the Cadence PCIe  controller in
+	  Say Y here if you want to support the Cadence PCIe  platform controller in
 	  endpoint mode. This PCIe controller may be embedded into many
 	  different vendors SoCs.