watchdog: da9062: add power management ops

Disable the watchdog during suspend if it is enabled and re-enable it on
resume. So we can sleep without the interruptions.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20191128171931.22563-1-m.felsch@pengutronix.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c
index e149e66a6ea9f2ef3c30ed397ac8f9cf2b477ce3..2a1e7de25b71bbeee2809a8da1688e7e38134b75 100644 (file)
--- a/drivers/watchdog/da9062_wdt.c
+++ b/drivers/watchdog/da9062_wdt.c
@@ -212,6 +212,7 @@ static int da9062_wdt_probe(struct platform_device *pdev)
        watchdog_set_restart_priority(&wdt->wdtdev, 128);
 
        watchdog_set_drvdata(&wdt->wdtdev, wdt);
+       dev_set_drvdata(dev, &wdt->wdtdev);
 
        ret = devm_watchdog_register_device(dev, &wdt->wdtdev);
        if (ret < 0)
@@ -220,10 +221,34 @@ static int da9062_wdt_probe(struct platform_device *pdev)
        return da9062_wdt_ping(&wdt->wdtdev);
 }
 
+static int __maybe_unused da9062_wdt_suspend(struct device *dev)
+{
+       struct watchdog_device *wdd = dev_get_drvdata(dev);
+
+       if (watchdog_active(wdd))
+               return da9062_wdt_stop(wdd);
+
+       return 0;
+}
+
+static int __maybe_unused da9062_wdt_resume(struct device *dev)
+{
+       struct watchdog_device *wdd = dev_get_drvdata(dev);
+
+       if (watchdog_active(wdd))
+               return da9062_wdt_start(wdd);
+
+       return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(da9062_wdt_pm_ops,
+                        da9062_wdt_suspend, da9062_wdt_resume);
+
 static struct platform_driver da9062_wdt_driver = {
        .probe = da9062_wdt_probe,
        .driver = {
                .name = "da9062-watchdog",
+               .pm = &da9062_wdt_pm_ops,
                .of_match_table = da9062_compatible_id_table,
        },
 };