[MPCore,Watchdog] : Add suspend/resume support.

Commit Message

Peter Fordham June 15, 2011, 8:18 p.m. UTC

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

---
 drivers/watchdog/mpcore_wdt.c |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)

 		.owner	= THIS_MODULE,

Patch

diff --git a/drivers/watchdog/mpcore_wdt.c b/drivers/watchdog/mpcore_wdt.c
index 2b4af22..5f63a74 100644
--- a/drivers/watchdog/mpcore_wdt.c
+++ b/drivers/watchdog/mpcore_wdt.c
@@ -407,12 +407,36 @@  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		= {