1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/mfd/aspeed,ast2x00-scu.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Aspeed System Control Unit
8
9 description:
10 The Aspeed System Control Unit manages the global behaviour of the SoC,
11 configuring elements such as clocks, pinmux, and reset.
12
13 maintainers:
14 - Joel Stanley <joel@jms.id.au>
15 - Andrew Jeffery <andrew@aj.id.au>
16
17 properties:
18 compatible:
19 items:
20 - enum:
21 - aspeed,ast2400-scu
22 - aspeed,ast2500-scu
23 - aspeed,ast2600-scu
24 - const: syscon
25 - const: simple-mfd
26
27 reg:
28 maxItems: 1
29
30 ranges: true
31
32 '#address-cells':
33 const: 1
34
35 '#size-cells':
36 const: 1
37
38 '#clock-cells':
39 const: 1
40
41 '#reset-cells':
42 const: 1
43
44 patternProperties:
45 '^p2a-control@[0-9a-f]+$':
46 description: See Documentation/devicetree/bindings/misc/aspeed-p2a-ctrl.txt
47 type: object
48
49 '^pinctrl(@[0-9a-f]+)?$':
50 type: object
51 additionalProperties: true
52 properties:
53 compatible:
54 contains:
55 enum:
56 - aspeed,ast2400-pinctrl
57 - aspeed,ast2500-pinctrl
58 - aspeed,ast2600-pinctrl
59
60 required:
61 - compatible
62
63 '^interrupt-controller@[0-9a-f]+$':
64 description: See Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
65 type: object
66
67 '^silicon-id@[0-9a-f]+$':
68 description: Unique hardware silicon identifiers within the SoC
69 type: object
70 additionalProperties: false
71
72 properties:
73 compatible:
74 items:
75 - enum:
76 - aspeed,ast2400-silicon-id
77 - aspeed,ast2500-silicon-id
78 - aspeed,ast2600-silicon-id
79 - const: aspeed,silicon-id
80
81 reg:
82 description:
83 The reg should be the unique silicon id register, and not backwards
84 compatible one in eg. the 2600.
85 minItems: 1
86 items:
87 - description: silicon id information registers
88 - description: unique chip id registers
89
90 required:
91 - compatible
92 - reg
93 - ranges
94 - '#address-cells'
95 - '#size-cells'
96 - '#clock-cells'
97 - '#reset-cells'
98
99 additionalProperties: false
100
101 examples:
102 - |
103 syscon@1e6e2000 {
104 compatible = "aspeed,ast2400-scu", "syscon", "simple-mfd";
105 reg = <0x1e6e2000 0x1a8>;
106 #clock-cells = <1>;
107 #reset-cells = <1>;
108
109 #address-cells = <1>;
110 #size-cells = <1>;
111 ranges = <0x0 0x1e6e2000 0x1000>;
112
113 silicon-id@7c {
114 compatible = "aspeed,ast2500-silicon-id", "aspeed,silicon-id";
115 reg = <0x7c 0x4>, <0x150 0x8>;
116 };
117 };
118 ...
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