linux/Documentation/devicetree/bindings/pci/spear13xx-pcie.txt

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SPEAr13XX PCIe DT detail:
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SPEAr13XX uses synopsis designware PCIe controller and ST MiPHY as phy
controller.
Required properties:
- compatible : should be "st,spear1340-pcie", "snps,dw-pcie".
- phys : phandle to phy node associated with pcie controller
- phy-names : must be "pcie-phy"
- All other definitions as per generic PCI bindings
Optional properties:
- st,pcie-is-gen1 indicates that forced gen1 initialization is needed.