diff --git a/Documentation/devicetree/bindings/watchdog/omap-wdt.txt b/Documentation/devicetree/bindings/watchdog/omap-wdt.txt
index 597e19d18dcab1cbdd7bea0fe569bc86afcb6720..1fa20e453a2d00207fb72408b3c84db066d3ed9a 100644
--- a/Documentation/devicetree/bindings/watchdog/omap-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/omap-wdt.txt
@@ -4,6 +4,9 @@ Required properties:
 - compatible : "ti,omap3-wdt" for OMAP3 or "ti,omap4-wdt" for OMAP4
 - ti,hwmods : Name of the hwmod associated to the WDT
 
+Optional properties:
+- timeout-sec : default watchdog timeout in seconds
+
 Examples:
 
 wdt2: wdt@4a314000 {
diff --git a/drivers/watchdog/omap_wdt.c b/drivers/watchdog/omap_wdt.c
index 1e6be9e405779884c315de023a8aad18e5c07419..88ca2ea886952d7791ce619f341e355f3c18fc71 100644
--- a/drivers/watchdog/omap_wdt.c
+++ b/drivers/watchdog/omap_wdt.c
@@ -234,10 +234,7 @@ static int omap_wdt_probe(struct platform_device *pdev)
 	omap_wdt->min_timeout = TIMER_MARGIN_MIN;
 	omap_wdt->max_timeout = TIMER_MARGIN_MAX;
 
-	if (timer_margin >= TIMER_MARGIN_MIN &&
-	    timer_margin <= TIMER_MARGIN_MAX)
-		omap_wdt->timeout = timer_margin;
-	else
+	if (watchdog_init_timeout(omap_wdt, timer_margin, &pdev->dev) < 0)
 		omap_wdt->timeout = TIMER_MARGIN_DEFAULT;
 
 	watchdog_set_drvdata(omap_wdt, wdev);