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-* Atmel Watchdog Timers
-
-** at91sam9-wdt
-
-Required properties:
-- compatible: must be "atmel,at91sam9260-wdt".
-- reg: physical base address of the controller and length of memory mapped
- region.
-- clocks: phandle to input clock.
-
-Optional properties:
-- timeout-sec: contains the watchdog timeout in seconds.
-- interrupts : Should contain WDT interrupt.
-- atmel,max-heartbeat-sec : Should contain the maximum heartbeat value in
- seconds. This value should be less or equal to 16. It is used to
- compute the WDV field.
-- atmel,min-heartbeat-sec : Should contain the minimum heartbeat value in
- seconds. This value must be smaller than the max-heartbeat-sec value.
- It is used to compute the WDD field.
-- atmel,watchdog-type : Should be "hardware" or "software". Hardware watchdog
- use the at91 watchdog reset. Software watchdog use the watchdog
- interrupt to trigger a software reset.
-- atmel,reset-type : Should be "proc" or "all".
- "all" : assert peripherals and processor reset signals
- "proc" : assert the processor reset signal
- This is valid only when using "hardware" watchdog.
-- atmel,disable : Should be present if you want to disable the watchdog.
-- atmel,idle-halt : Should be present if you want to stop the watchdog when
- entering idle state.
- CAUTION: This property should be used with care, it actually makes the
- watchdog not counting when the CPU is in idle state, therefore the
- watchdog reset time depends on mean CPU usage and will not reset at all
- if the CPU stop working while it is in idle state, which is probably
- not what you want.
-- atmel,dbg-halt : Should be present if you want to stop the watchdog when
- entering debug state.
-
-Example:
- watchdog@fffffd40 {
- compatible = "atmel,at91sam9260-wdt";
- reg = <0xfffffd40 0x10>;
- interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
- clocks = <&clk32k>;
- timeout-sec = <15>;
- atmel,watchdog-type = "hardware";
- atmel,reset-type = "all";
- atmel,dbg-halt;
- atmel,idle-halt;
- atmel,max-heartbeat-sec = <16>;
- atmel,min-heartbeat-sec = <0>;
- };