36 lines
1.3 KiB
Plaintext
36 lines
1.3 KiB
Plaintext
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* Atmel SAMA5D4 Watchdog Timer (WDT) Controller
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Required properties:
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- compatible: "atmel,sama5d4-wdt"
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- reg: base physical address and length of memory mapped region.
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Optional properties:
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- timeout-sec: watchdog timeout value (in seconds).
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- interrupts: interrupt number to the CPU.
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- atmel,watchdog-type: should be "hardware" or "software".
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"hardware": enable watchdog fault reset. A watchdog fault triggers
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watchdog reset.
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"software": enable watchdog fault interrupt. A watchdog fault asserts
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watchdog interrupt.
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- atmel,idle-halt: present if you want to stop the watchdog when the CPU is
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in idle state.
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CAUTION: This property should be used with care, it actually makes the
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watchdog not counting when the CPU is in idle state, therefore the
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watchdog reset time depends on mean CPU usage and will not reset at all
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if the CPU stop working while it is in idle state, which is probably
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not what you want.
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- atmel,dbg-halt: present if you want to stop the watchdog when the CPU is
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in debug state.
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Example:
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watchdog@fc068640 {
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compatible = "atmel,sama5d4-wdt";
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reg = <0xfc068640 0x10>;
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interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>;
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timeout-sec = <10>;
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atmel,watchdog-type = "hardware";
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atmel,dbg-halt;
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atmel,idle-halt;
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status = "okay";
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};
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