Platform bus based DesignWare PCIe Controller - Host mode

configname: CONFIG_PCIE_DW_PLAT_HOST

Linux Kernel Configuration
└─>Bus options (PCI etc.)
└─>PCI controller drivers
└─>DesignWare PCI Core Support
└─>Platform bus based DesignWare PCIe Controller - Host mode
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Enables support for the PCIe controller in the Designware IP to
work in host mode. There are two instances of PCIe controller in
Designware IP.
This controller can work either as EP or RC. In order to enable
host-specific features PCIE_DW_PLAT_HOST must be selected and in
order to enable device-specific features PCI_DW_PLAT_EP must be
selected.