arm64: a37xx: pci: add support for aardvark pcie driver

This patch introduced the Aardvark PCIe driver based
driver model.
The PCIe driver is supposed to work in Root Complex
mode. It only supports X1 lane width.
Signed-off-by: NWilson Ding <dingwei@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/38725Reviewed-by: NVictor Gu <xigu@marvell.com>
Reviewed-by: NHua Jing <jinghua@marvell.com>
Tested-by: NHua Jing <jinghua@marvell.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefan Roese <sr@denx.de>
Signed-off-by: NKen Ma <make@marvell.com>
Signed-off-by: NStefan Roese <sr@denx.de>

drivers/pci/Kconfig

@@ -26,6 +26,16 @@ config DM_PCI_COMPAT
 	  measure when porting a board to use driver model for PCI. Once the
 	  board is fully supported, this option should be disabled.
 
+config PCI_AARDVARK
+	bool "Enable Aardvark PCIe driver"
+	default n
+	depends on DM_PCI
+	depends on ARMADA_3700
+	help
+	  Say Y here if you want to enable PCIe controller support on
+	  Armada37x0 SoCs. The PCIe controller on Armada37x0 is based on
+	  Aardvark hardware.
+
 config PCI_PNP
 	bool "Enable Plug & Play support for PCI"
 	depends on PCI || DM_PCI

drivers/pci/Makefile

@@ -30,6 +30,7 @@ obj-$(CONFIG_SH4_PCI) += pci_sh4.o
 obj-$(CONFIG_SH7751_PCI) +=pci_sh7751.o
 obj-$(CONFIG_SH7780_PCI) +=pci_sh7780.o
 obj-$(CONFIG_PCI_TEGRA) += pci_tegra.o
+obj-$(CONFIG_PCI_AARDVARK) += pci-aardvark.o
 obj-$(CONFIG_PCIE_DW_MVEBU) += pcie_dw_mvebu.o
 obj-$(CONFIG_PCIE_LAYERSCAPE) += pcie_layerscape.o
 obj-$(CONFIG_PCIE_LAYERSCAPE) += pcie_layerscape_fixup.o