1* Samsung's Watchdog Timer Controller 2 3The Samsung's Watchdog controller is used for resuming system operation 4after a preset amount of time during which the WDT reset event has not 5occurred. 6 7Required 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 (c) "samsung,exynos7-wdt" for Exynos7 13 14- reg : base physical address of the controller and length of memory mapped 15 region. 16- interrupts : interrupt number to the cpu. 17- samsung,syscon-phandle : reference to syscon node (This property required only 18 in case of compatible being "samsung,exynos5250-wdt" or "samsung,exynos5420-wdt". 19 In case of Exynos5250 and 5420 this property points to syscon node holding the PMU 20 base address) 21 22Optional properties: 23- timeout-sec : contains the watchdog timeout in seconds. 24 25Example: 26 27watchdog@101D0000 { 28 compatible = "samsung,exynos5250-wdt"; 29 reg = <0x101D0000 0x100>; 30 interrupts = <0 42 0>; 31 clocks = <&clock 336>; 32 clock-names = "watchdog"; 33 samsung,syscon-phandle = <&pmu_syscon>; 34}; 35