PCI: cadence: Add host driver for Cadence PCIe controller

This patch adds support to the Cadence PCIe controller in host mode.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

MAINTAINERS

@@ -10402,6 +10402,13 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/pci/pci-armada8k.txt
 F:	drivers/pci/dwc/pcie-armada8k.c
 
+PCI DRIVER FOR CADENCE PCIE IP
+M:	Alan Douglas <adouglas@cadence.com>
+L:	linux-pci@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/pci/cdns,*.txt
+F:	drivers/pci/host/pcie-cadence*
+
 PCI DRIVER FOR FREESCALE LAYERSCAPE
 M:	Minghuan Lian <minghuan.Lian@freescale.com>
 M:	Mingkai Hu <mingkai.hu@freescale.com>

drivers/pci/host/Kconfig

@@ -210,6 +210,16 @@ config PCIE_TANGO_SMP8759
 	  This can lead to data corruption if drivers perform concurrent
 	  config and MMIO accesses.
 
+config PCIE_CADENCE_HOST
+	bool "Cadence PCIe host controller"
+	depends on OF
+	depends on PCI
+	select IRQ_DOMAIN
+	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 VMD
 	depends on PCI_MSI && X86_64 && SRCU
 	tristate "Intel Volume Management Device Driver"

drivers/pci/host/Makefile

@@ -22,6 +22,7 @@ obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o
 obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
 obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
 obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
+obj-$(CONFIG_PCIE_CADENCE_HOST) += pcie-cadence-host.o
 obj-$(CONFIG_VMD) += vmd.o
 
 # The following drivers are for devices that use the generic ACPI