Documentation/devicetree/bindings/arm/twd.txt

   1 * ARM Timer Watchdog
   2
   3 ARM 11MP, Cortex-A5 and Cortex-A9 are often associated with a per-core
   4 Timer-Watchdog (aka TWD), which provides both a per-cpu local timer
   5 and watchdog.
   6
   7 The TWD is usually attached to a GIC to deliver its two per-processor
   8 interrupts.
   9
  10 ** Timer node required properties:
  11
  12 - compatible : Should be one of:
  13         "arm,cortex-a9-twd-timer"
  14         "arm,cortex-a5-twd-timer"
  15         "arm,arm11mp-twd-timer"
  16
  17 - interrupts : One interrupt to each core
  18
  19 - reg : Specify the base address and the size of the TWD timer
  20         register window.
  21
  22 Optional
  23
  24 - always-on : a boolean property. If present, the timer is powered through
  25   an always-on power domain, therefore it never loses context.
  26
  27 Example:
  28
  29         twd-timer@2c000600 {
  30                 compatible = "arm,arm11mp-twd-timer"";
  31                 reg = <0x2c000600 0x20>;
  32                 interrupts = <1 13 0xf01>;
  33         };
  34
  35 ** Watchdog node properties:
  36
  37 - compatible : Should be one of:
  38         "arm,cortex-a9-twd-wdt"
  39         "arm,cortex-a5-twd-wdt"
  40         "arm,arm11mp-twd-wdt"
  41
  42 - interrupts : One interrupt to each core
  43
  44 - reg : Specify the base address and the size of the TWD watchdog
  45         register window.
  46
  47 Example:
  48
  49         twd-watchdog@2c000620 {
  50                 compatible = "arm,arm11mp-twd-wdt";
  51                 reg = <0x2c000620 0x20>;
  52                 interrupts = <1 14 0xf01>;
  53         };