The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/watchdog/nuvoton,npcm-wdt.txt

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    1 Nuvoton NPCM Watchdog
    2 
    3 Nuvoton NPCM timer module provides five 24-bit timer counters, and a watchdog.
    4 The watchdog supports a pre-timeout interrupt that fires 10ms before the
    5 expiry.
    6 
    7 Required properties:
    8 - compatible      : "nuvoton,npcm750-wdt" for NPCM750 (Poleg), or
    9                     "nuvoton,wpcm450-wdt" for WPCM450 (Hermon), or
   10                     "nuvoton,npcm845-wdt" for NPCM845 (Arbel).
   11 - reg             : Offset and length of the register set for the device.
   12 - interrupts      : Contain the timer interrupt with flags for
   13                     falling edge.
   14 
   15 Required clocking property, have to be one of:
   16 - clocks          : phandle of timer reference clock.
   17 - clock-frequency : The frequency in Hz of the clock that drives the NPCM7xx
   18                     timer (usually 25000000).
   19 
   20 Optional properties:
   21 - timeout-sec : Contains the watchdog timeout in seconds
   22 
   23 Example:
   24 
   25 timer@f000801c {
   26     compatible = "nuvoton,npcm750-wdt";
   27     interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
   28     reg = <0xf000801c 0x4>;
   29     clocks = <&clk NPCM7XX_CLK_TIMER>;
   30 };

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