Documentation/devicetree/bindings/csky/cpus.txt

   1 ==================
   2 C-SKY CPU Bindings
   3 ==================
   4
   5 The device tree allows to describe the layout of CPUs in a system through
   6 the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
   7 defining properties for every cpu.
   8
   9 Only SMP system need to care about the cpus node and single processor
  10 needn't define cpus node at all.
  11
  12 =====================================
  13 cpus and cpu node bindings definition
  14 =====================================
  15
  16 - cpus node
  17
  18         Description: Container of cpu nodes
  19
  20         The node name must be "cpus".
  21
  22         A cpus node must define the following properties:
  23
  24         - #address-cells
  25                 Usage: required
  26                 Value type: <u32>
  27                 Definition: must be set to 1
  28         - #size-cells
  29                 Usage: required
  30                 Value type: <u32>
  31                 Definition: must be set to 0
  32
  33 - cpu node
  34
  35         Description: Describes one of SMP cores
  36
  37         PROPERTIES
  38
  39         - device_type
  40                 Usage: required
  41                 Value type: <string>
  42                 Definition: must be "cpu"
  43         - reg
  44                 Usage: required
  45                 Value type: <u32>
  46                 Definition: CPU index
  47         - compatible:
  48                 Usage: required
  49                 Value type: <string>
  50                 Definition: must contain "csky", eg:
  51                         "csky,610"
  52                         "csky,807"
  53                         "csky,810"
  54                         "csky,860"
  55
  56 Example:
  57 --------
  58
  59         cpus {
  60                 #address-cells = <1>;
  61                 #size-cells = <0>;
  62                 cpu@0 {
  63                         device_type = "cpu";
  64                         reg = <0>;
  65                         status = "ok";
  66                 };
  67
  68                 cpu@1 {
  69                         device_type = "cpu";
  70                         reg = <1>;
  71                         status = "ok";
  72                 };
  73         };