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




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Based on kernel version 4.13.3. Page generated on 2017-09-23 13:55 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		- "samsung,s3c2410-wdt" for S3C2410
10		- "samsung,s3c6410-wdt" for S3C6410, S5PV210 and Exynos4
11		- "samsung,exynos5250-wdt" for Exynos5250
12		- "samsung,exynos5420-wdt" for Exynos5420
13		- "samsung,exynos7-wdt" for Exynos7
14	
15	- reg : base physical address of the controller and length of memory mapped
16		region.
17	- interrupts : interrupt number to the cpu.
18	- samsung,syscon-phandle : reference to syscon node (This property required only
19		in case of compatible being "samsung,exynos5250-wdt" or "samsung,exynos5420-wdt".
20		In case of Exynos5250 and 5420 this property points to syscon node holding the PMU
21		base address)
22	
23	Optional properties:
24	- timeout-sec : contains the watchdog timeout in seconds.
25	
26	Example:
27	
28	watchdog@101D0000 {
29		compatible = "samsung,exynos5250-wdt";
30		reg = <0x101D0000 0x100>;
31		interrupts = <0 42 0>;
32		clocks = <&clock 336>;
33		clock-names = "watchdog";
34		samsung,syscon-phandle = <&pmu_syscon>;
35	};
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