xref: /freebsd/sys/contrib/device-tree/Bindings/pci/xilinx-nwl-pcie.txt (revision 7fdf597e96a02165cfe22ff357b857d5fa15ed8a)
1* Xilinx NWL PCIe Root Port Bridge DT description
2
3Required properties:
4- compatible: Should contain "xlnx,nwl-pcie-2.11"
5- #address-cells: Address representation for root ports, set to <3>
6- #size-cells: Size representation for root ports, set to <2>
7- #interrupt-cells: specifies the number of cells needed to encode an
8	interrupt source. The value must be 1.
9- reg: Should contain Bridge, PCIe Controller registers location,
10	configuration space, and length
11- reg-names: Must include the following entries:
12	"breg": bridge registers
13	"pcireg": PCIe controller registers
14	"cfg": configuration space region
15- device_type: must be "pci"
16- interrupts: Should contain NWL PCIe interrupt
17- interrupt-names: Must include the following entries:
18	"msi1, msi0": interrupt asserted when an MSI is received
19	"intx": interrupt asserted when a legacy interrupt is received
20	"misc": interrupt asserted when miscellaneous interrupt is received
21- interrupt-map-mask and interrupt-map: standard PCI properties to define the
22	mapping of the PCI interface to interrupt numbers.
23- ranges: ranges for the PCI memory regions (I/O space region is not
24	supported by hardware)
25	Please refer to the standard PCI bus binding document for a more
26	detailed explanation
27- msi-controller: indicates that this is MSI controller node
28- msi-parent:  MSI parent of the root complex itself
29- legacy-interrupt-controller: Interrupt controller device node for Legacy
30	interrupts
31	- interrupt-controller: identifies the node as an interrupt controller
32	- #interrupt-cells: should be set to 1
33	- #address-cells: specifies the number of cells needed to encode an
34		address. The value must be 0.
35
36Optional properties:
37- dma-coherent: present if DMA operations are coherent
38- clocks: Input clock specifier. Refer to common clock bindings
39
40Example:
41++++++++
42
43nwl_pcie: pcie@fd0e0000 {
44	#address-cells = <3>;
45	#size-cells = <2>;
46	compatible = "xlnx,nwl-pcie-2.11";
47	#interrupt-cells = <1>;
48	msi-controller;
49	device_type = "pci";
50	interrupt-parent = <&gic>;
51	interrupts = <0 114 4>, <0 115 4>, <0 116 4>, <0 117 4>, <0 118 4>;
52	interrupt-names = "msi0", "msi1", "intx", "dummy", "misc";
53	interrupt-map-mask = <0x0 0x0 0x0 0x7>;
54	interrupt-map = <0x0 0x0 0x0 0x1 &pcie_intc 0x1>,
55			<0x0 0x0 0x0 0x2 &pcie_intc 0x2>,
56			<0x0 0x0 0x0 0x3 &pcie_intc 0x3>,
57			<0x0 0x0 0x0 0x4 &pcie_intc 0x4>;
58
59	msi-parent = <&nwl_pcie>;
60	reg = <0x0 0xfd0e0000 0x0 0x1000>,
61	      <0x0 0xfd480000 0x0 0x1000>,
62	      <0x80 0x00000000 0x0 0x1000000>;
63	reg-names = "breg", "pcireg", "cfg";
64	ranges = <0x02000000 0x00000000 0xe0000000 0x00000000 0xe0000000 0x00000000 0x10000000  /* non-prefetchable memory */
65		  0x43000000 0x00000006 0x00000000 0x00000006 0x00000000 0x00000002 0x00000000>;/* prefetchable memory */
66
67	pcie_intc: legacy-interrupt-controller {
68		interrupt-controller;
69		#address-cells = <0>;
70		#interrupt-cells = <1>;
71	};
72
73};
74