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watchdog: omap_wdt: early_enable module parameter

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Add a early_enable module parameter to the omap_wdt that starts the
watchdog on module insertion. The default value is 0 which does not
start the watchdog - which also does not change the behavior if the
parameter is not given.

Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Lars Poeschel 2015-06-25 12:21:51 +02:00 committed by Wim Van Sebroeck
parent 5e53c8ed81
commit b2102eb36e
2 changed files with 9 additions and 0 deletions
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1
Documentation/watchdog/watchdog-parameters.txt
View File

@ -208,6 +208,7 @@ nowayout: Watchdog cannot be stopped once started
-------------------------------------------------
omap_wdt:
timer_margin: initial watchdog timeout (in seconds)
early_enable: Watchdog is started on module insertion (default=0
nowayout: Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------

8
drivers/watchdog/omap_wdt.c
View File

@ -55,6 +55,11 @@ MODULE_PARM_DESC(timer_margin, "initial watchdog timeout (in seconds)");
#define to_omap_wdt_dev(_wdog) container_of(_wdog, struct omap_wdt_dev, wdog)
static bool early_enable;
module_param(early_enable, bool, 0);
MODULE_PARM_DESC(early_enable,
"Watchdog is started on module insertion (default=0)");
struct omap_wdt_dev {
struct watchdog_device wdog;
void __iomem *base; /* physical */
@ -279,6 +284,9 @@ static int omap_wdt_probe(struct platform_device *pdev)
pm_runtime_put_sync(wdev->dev);
if (early_enable)
omap_wdt_start(&wdev->wdog);
return 0;
}