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-rw-r--r--Documentation/devicetree/bindings/watchdog/samsung-wdt.txt21
1 files changed, 20 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt b/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
index 2aa486cc1ff6..cfff37511aac 100644
--- a/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
@@ -5,10 +5,29 @@ after a preset amount of time during which the WDT reset event has not
occurred.
Required properties:
-- compatible : should be "samsung,s3c2410-wdt"
+- compatible : should be one among the following
+ (a) "samsung,s3c2410-wdt" for Exynos4 and previous SoCs
+ (b) "samsung,exynos5250-wdt" for Exynos5250
+ (c) "samsung,exynos5420-wdt" for Exynos5420
+
- reg : base physical address of the controller and length of memory mapped
region.
- interrupts : interrupt number to the cpu.
+- samsung,syscon-phandle : reference to syscon node (This property required only
+ in case of compatible being "samsung,exynos5250-wdt" or "samsung,exynos5420-wdt".
+ In case of Exynos5250 and 5420 this property points to syscon node holding the PMU
+ base address)
Optional properties:
- timeout-sec : contains the watchdog timeout in seconds.
+
+Example:
+
+watchdog@101D0000 {
+ compatible = "samsung,exynos5250-wdt";
+ reg = <0x101D0000 0x100>;
+ interrupts = <0 42 0>;
+ clocks = <&clock 336>;
+ clock-names = "watchdog";
+ samsung,syscon-phandle = <&pmu_syscon>;
+};