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