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1 Annapurna Labs Alpine Platform Device Tree Bindings
2 ---------------------------------------------------------------
3
4 Boards in the Alpine family shall have the following properties:
5
6 * Required root node properties:
7 compatible: must contain "al,alpine"
8
9 * Example:
10
11 / {
12         model = "Annapurna Labs Alpine Dev Board";
13         compatible = "al,alpine";
14
15         ...
16 }
17
18 * CPU node:
19
20 The Alpine platform includes cortex-a15 cores.
21 enable-method: must be "al,alpine-smp" to allow smp  [1]
22
23 Example:
24
25 cpus {
26         #address-cells = <1>;
27         #size-cells = <0>;
28         enable-method = "al,alpine-smp";
29
30         cpu@0 {
31                 compatible = "arm,cortex-a15";
32                 device_type = "cpu";
33                 reg = <0>;
34         };
35
36         cpu@1 {
37                 compatible = "arm,cortex-a15";
38                 device_type = "cpu";
39                 reg = <1>;
40         };
41
42         cpu@2 {
43                 compatible = "arm,cortex-a15";
44                 device_type = "cpu";
45                 reg = <2>;
46         };
47
48         cpu@3 {
49                 compatible = "arm,cortex-a15";
50                 device_type = "cpu";
51                 reg = <3>;
52         };
53 };
54
55
56 * Alpine CPU resume registers
57
58 The CPU resume register are used to define required resume address after
59 reset.
60
61 Properties:
62 - compatible : Should contain "al,alpine-cpu-resume".
63 - reg : Offset and length of the register set for the device
64
65 Example:
66
67 cpu_resume {
68         compatible = "al,alpine-cpu-resume";
69         reg = <0xfbff5ed0 0x30>;
70 };
71
72 * Alpine System-Fabric Service Registers
73
74 The System-Fabric Service Registers allow various operation on CPU and
75 system fabric, like powering CPUs off.
76
77 Properties:
78 - compatible : Should contain "al,alpine-sysfabric-service" and "syscon".
79 - reg : Offset and length of the register set for the device
80
81 Example:
82
83 nb_service {
84         compatible = "al,alpine-sysfabric-service", "syscon";
85         reg = <0xfb070000 0x10000>;
86 };
87
88 [1] arm/cpu-enable-method/al,alpine-smp