xref: /freebsd/sys/contrib/device-tree/Bindings/pci/fsl,pci.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
1*c66ec88fSEmmanuel Vadot* Bus Enumeration by Freescale PCI-X Agent
2*c66ec88fSEmmanuel Vadot
3*c66ec88fSEmmanuel VadotTypically any Freescale PCI-X bridge hardware strapped into Agent mode
4*c66ec88fSEmmanuel Vadotis prevented from enumerating the bus. The PrPMC form-factor requires
5*c66ec88fSEmmanuel Vadotall mezzanines to be PCI-X Agents, but one per system may still
6*c66ec88fSEmmanuel Vadotenumerate the bus.
7*c66ec88fSEmmanuel Vadot
8*c66ec88fSEmmanuel VadotThe property defined below will allow a PCI-X bridge to be used for bus
9*c66ec88fSEmmanuel Vadotenumeration despite being strapped into Agent mode.
10*c66ec88fSEmmanuel Vadot
11*c66ec88fSEmmanuel VadotRequired properties:
12*c66ec88fSEmmanuel Vadot- fsl,pci-agent-force-enum : There is no value associated with this
13*c66ec88fSEmmanuel Vadot  property. The property itself is treated as a boolean.
14*c66ec88fSEmmanuel Vadot
15*c66ec88fSEmmanuel VadotExample:
16*c66ec88fSEmmanuel Vadot
17*c66ec88fSEmmanuel Vadot	/* PCI-X bridge known to be PrPMC Monarch */
18*c66ec88fSEmmanuel Vadot	pci0: pci@ef008000 {
19*c66ec88fSEmmanuel Vadot		fsl,pci-agent-force-enum;
20*c66ec88fSEmmanuel Vadot		#interrupt-cells = <1>;
21*c66ec88fSEmmanuel Vadot		#size-cells = <2>;
22*c66ec88fSEmmanuel Vadot		#address-cells = <3>;
23*c66ec88fSEmmanuel Vadot		compatible = "fsl,mpc8540-pcix", "fsl,mpc8540-pci";
24*c66ec88fSEmmanuel Vadot		device_type = "pci";
25*c66ec88fSEmmanuel Vadot		...
26*c66ec88fSEmmanuel Vadot		...
27*c66ec88fSEmmanuel Vadot	};
28