summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/csky/cpus.txt
blob: ae79412f2680f551c986a024e5deeaafd8147d75 (plain)
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
73
==================
C-SKY CPU Bindings
==================

The device tree allows to describe the layout of CPUs in a system through
the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
defining properties for every cpu.

Only SMP system need to care about the cpus node and single processor
needn't define cpus node at all.

=====================================
cpus and cpu node bindings definition
=====================================

- cpus node

	Description: Container of cpu nodes

	The node name must be "cpus".

	A cpus node must define the following properties:

	- #address-cells
		Usage: required
		Value type: <u32>
		Definition: must be set to 1
	- #size-cells
		Usage: required
		Value type: <u32>
		Definition: must be set to 0

- cpu node

	Description: Describes one of SMP cores

	PROPERTIES

	- device_type
		Usage: required
		Value type: <string>
		Definition: must be "cpu"
	- reg
		Usage: required
		Value type: <u32>
		Definition: CPU index
	- compatible:
		Usage: required
		Value type: <string>
		Definition: must contain "csky", eg:
			"csky,610"
			"csky,807"
			"csky,810"
			"csky,860"

Example:
--------

	cpus {
		#address-cells = <1>;
		#size-cells = <0>;
		cpu@0 {
			device_type = "cpu";
			reg = <0>;
			status = "ok";
		};

		cpu@1 {
			device_type = "cpu";
			reg = <1>;
			status = "ok";
		};
	};