Documentation/devicetree/bindings/arm/al,alpine.txt

   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