Documentation/devicetree/bindings/watchdog/samsung-wdt.txt

   1 * Samsung's Watchdog Timer Controller
   2
   3 The Samsung's Watchdog controller is used for resuming system operation
   4 after a preset amount of time during which the WDT reset event has not
   5 occurred.
   6
   7 Required properties:
   8 - compatible : should be one among the following
   9         (a) "samsung,s3c2410-wdt" for Exynos4 and previous SoCs
  10         (b) "samsung,exynos5250-wdt" for Exynos5250
  11         (c) "samsung,exynos5420-wdt" for Exynos5420
  12
  13 - reg : base physical address of the controller and length of memory mapped
  14         region.
  15 - interrupts : interrupt number to the cpu.
  16 - samsung,syscon-phandle : reference to syscon node (This property required only
  17         in case of compatible being "samsung,exynos5250-wdt" or "samsung,exynos5420-wdt".
  18         In case of Exynos5250 and 5420 this property points to syscon node holding the PMU
  19         base address)
  20
  21 Optional properties:
  22 - timeout-sec : contains the watchdog timeout in seconds.
  23
  24 Example:
  25
  26 watchdog@101D0000 {
  27         compatible = "samsung,exynos5250-wdt";
  28         reg = <0x101D0000 0x100>;
  29         interrupts = <0 42 0>;
  30         clocks = <&clock 336>;
  31         clock-names = "watchdog";
  32         samsung,syscon-phandle = <&pmu_syscon>;
  33 };