watchdog: mpcore_wdt: Add suspend/resume support.

Add support for suspend and resume to the MPCore watchdog driver.

Signed-off-by: Peter Fordham <peter.fordham@gmail.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/watchdog/mpcore_wdt.c b/drivers/watchdog/mpcore_wdt.c
index 2b4af222b5f2..4dc31024d26c 100644
--- a/drivers/watchdog/mpcore_wdt.c
+++ b/drivers/watchdog/mpcore_wdt.c
@@ -407,12 +407,35 @@ static int __devexit mpcore_wdt_remove(struct platform_device *dev)
         return 0;
 }
 
+#ifdef CONFIG_PM
+static int mpcore_wdt_suspend(struct platform_device *dev, pm_message_t msg)
+{
+        struct mpcore_wdt *wdt = platform_get_drvdata(dev);
+        mpcore_wdt_stop(wdt);           /* Turn the WDT off */
+        return 0;
+}
+
+static int mpcore_wdt_resume(struct platform_device *dev)
+{
+        struct mpcore_wdt *wdt = platform_get_drvdata(dev);
+        /* re-activate timer */
+        if (test_bit(0, &wdt->timer_alive))
+                mpcore_wdt_start(wdt);
+        return 0;
+}
+#else
+#define mpcore_wdt_suspend      NULL
+#define mpcore_wdt_resume       NULL
+#endif
+
 /* work with hotplug and coldplug */
 MODULE_ALIAS("platform:mpcore_wdt");
 
 static struct platform_driver mpcore_wdt_driver = {
         .probe          = mpcore_wdt_probe,
         .remove         = __devexit_p(mpcore_wdt_remove),
+        .suspend        = mpcore_wdt_suspend,
+        .resume         = mpcore_wdt_resume,
         .shutdown       = mpcore_wdt_shutdown,
         .driver         = {
                 .owner  = THIS_MODULE,