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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
commit8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be (patch)
treee9891aa6c295060d065adffd610c4f49ecf884f3 /Documentation/devicetree/bindings/watchdog/atmel-sama5d4-wdt.txt
parenta71852147516bc1cb5b0b3cbd13639bfd4022dc8 (diff)
Linux-libre 4.3.2-gnu
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+* Atmel SAMA5D4 Watchdog Timer (WDT) Controller
+
+Required properties:
+- compatible: "atmel,sama5d4-wdt"
+- reg: base physical address and length of memory mapped region.
+
+Optional properties:
+- timeout-sec: watchdog timeout value (in seconds).
+- interrupts: interrupt number to the CPU.
+- atmel,watchdog-type: should be "hardware" or "software".
+ "hardware": enable watchdog fault reset. A watchdog fault triggers
+ watchdog reset.
+ "software": enable watchdog fault interrupt. A watchdog fault asserts
+ watchdog interrupt.
+- atmel,idle-halt: present if you want to stop the watchdog when the CPU is
+ in 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: present if you want to stop the watchdog when the CPU is
+ in debug state.
+
+Example:
+ watchdog@fc068640 {
+ compatible = "atmel,sama5d4-wdt";
+ reg = <0xfc068640 0x10>;
+ interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>;
+ timeout-sec = <10>;
+ atmel,watchdog-type = "hardware";
+ atmel,dbg-halt;
+ atmel,idle-halt;
+ status = "okay";
+ };