1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/loongson,pch-msi.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Loongson PCH MSI Controller
8
9 maintainers:
10 - Jiaxun Yang <jiaxun.yang@flygoat.com>
11
12 description:
13 This interrupt controller is found in the Loongson LS7A family of PCH for
14 transforming interrupts from PCIe MSI into HyperTransport vectorized
15 interrupts.
16
17 properties:
18 compatible:
19 const: loongson,pch-msi-1.0
20
21 reg:
22 maxItems: 1
23
24 loongson,msi-base-vec:
25 description:
26 u32 value of the base of parent HyperTransport vector allocated
27 to PCH MSI.
28 $ref: /schemas/types.yaml#/definitions/uint32
29 minimum: 0
30 maximum: 255
31
32 loongson,msi-num-vecs:
33 description:
34 u32 value of the number of parent HyperTransport vectors allocated
35 to PCH MSI.
36 $ref: /schemas/types.yaml#/definitions/uint32
37 minimum: 1
38 maximum: 256
39
40 msi-controller: true
41
42 required:
43 - compatible
44 - reg
45 - msi-controller
46 - loongson,msi-base-vec
47 - loongson,msi-num-vecs
48
49 additionalProperties: true # fixme
50
51 examples:
52 - |
53 #include <dt-bindings/interrupt-controller/irq.h>
54 msi: msi-controller@2ff00000 {
55 compatible = "loongson,pch-msi-1.0";
56 reg = <0x2ff00000 0x4>;
57 msi-controller;
58 loongson,msi-base-vec = <64>;
59 loongson,msi-num-vecs = <64>;
60 interrupt-parent = <&htvec>;
61 };
62 ...
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