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Documentation / devicetree / bindings / watchdog / samsung-wdt.txt




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:02 EST.

1	* Samsung's Watchdog Timer Controller
2	
3	The Samsung's Watchdog controller is used for resuming system operation
4	after a preset amount of time during which the WDT reset event has not
5	occurred.
6	
7	Required properties:
8	- compatible : should be one among the following
9		(a) "samsung,s3c2410-wdt" for Exynos4 and previous SoCs
10		(b) "samsung,exynos5250-wdt" for Exynos5250
11		(c) "samsung,exynos5420-wdt" for Exynos5420
12	
13	- reg : base physical address of the controller and length of memory mapped
14		region.
15	- interrupts : interrupt number to the cpu.
16	- samsung,syscon-phandle : reference to syscon node (This property required only
17		in case of compatible being "samsung,exynos5250-wdt" or "samsung,exynos5420-wdt".
18		In case of Exynos5250 and 5420 this property points to syscon node holding the PMU
19		base address)
20	
21	Optional properties:
22	- timeout-sec : contains the watchdog timeout in seconds.
23	
24	Example:
25	
26	watchdog@101D0000 {
27		compatible = "samsung,exynos5250-wdt";
28		reg = <0x101D0000 0x100>;
29		interrupts = <0 42 0>;
30		clocks = <&clock 336>;
31		clock-names = "watchdog";
32		samsung,syscon-phandle = <&pmu_syscon>;
33	};
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