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authorGreta Zhang <greta.zhang@mediatek.com>2015-07-24 15:28:45 +0800
committerWim Van Sebroeck <wim@iguana.be>2015-09-09 21:33:56 +0200
commit9fab06920c9207aca8ff4e2416bb10cabc19294a (patch)
tree4772c0ef4ae105850321056e447600bdbcc36979 /drivers/watchdog
parent8a340dbbc4b10fe07a924e91979bfc93e966dd65 (diff)
watchdog: mtk_wdt: add suspend/resume support
add mediatek watchdog driver suspend/resume support Signed-off-by: Greta Zhang <greta.zhang@mediatek.com> Signed-off-by: Roger Lu <roger.lu@mediatek.com> Signed-off-by: Eddie Huang <eddie.huang@mediatek.com> Acked-by: Matthias Brugger <matthias.bgg@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/mtk_wdt.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 938b987de551..056412ca836d 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -221,17 +221,47 @@ static int mtk_wdt_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int mtk_wdt_suspend(struct device *dev)
+{
+ struct mtk_wdt_dev *mtk_wdt = dev_get_drvdata(dev);
+
+ if (watchdog_active(&mtk_wdt->wdt_dev))
+ mtk_wdt_stop(&mtk_wdt->wdt_dev);
+
+ return 0;
+}
+
+static int mtk_wdt_resume(struct device *dev)
+{
+ struct mtk_wdt_dev *mtk_wdt = dev_get_drvdata(dev);
+
+ if (watchdog_active(&mtk_wdt->wdt_dev)) {
+ mtk_wdt_start(&mtk_wdt->wdt_dev);
+ mtk_wdt_ping(&mtk_wdt->wdt_dev);
+ }
+
+ return 0;
+}
+#endif
+
static const struct of_device_id mtk_wdt_dt_ids[] = {
{ .compatible = "mediatek,mt6589-wdt" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
+static const struct dev_pm_ops mtk_wdt_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mtk_wdt_suspend,
+ mtk_wdt_resume)
+};
+
static struct platform_driver mtk_wdt_driver = {
.probe = mtk_wdt_probe,
.remove = mtk_wdt_remove,
.driver = {
.name = DRV_NAME,
+ .pm = &mtk_wdt_pm_ops,
.of_match_table = mtk_wdt_dt_ids,
},
};