linux/Documentation/devicetree/bindings/gpio/men-a021-wdt.txt
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   1Bindings for MEN A21 Watchdog device connected to GPIO lines
   2
   3Required properties:
   4- compatible: "men,a021-wdt"
   5- gpios: Specifies the pins that control the Watchdog, order:
   6  1: Watchdog enable
   7  2: Watchdog fast-mode
   8  3: Watchdog trigger
   9  4: Watchdog reset cause bit 0
  10  5: Watchdog reset cause bit 1
  11  6: Watchdog reset cause bit 2
  12
  13Optional properties:
  14- None
  15
  16Example:
  17        watchdog {
  18                compatible ="men,a021-wdt";
  19                gpios = <&gpio3 9  1    /* WD_EN */
  20                         &gpio3 10 1    /* WD_FAST */
  21                         &gpio3 11 1    /* WD_TRIG */
  22                         &gpio3 6  1    /* RST_CAUSE[0] */
  23                         &gpio3 7  1    /* RST_CAUSE[1] */
  24                         &gpio3 8  1>;  /* RST_CAUSE[2] */
  25        };
  26