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Commit 9fab0692 authored by Greta Zhang's avatar Greta Zhang Committed by Wim Van Sebroeck
Browse files

watchdog: mtk_wdt: add suspend/resume support 



add mediatek watchdog driver suspend/resume support

Signed-off-by: default avatarGreta Zhang <greta.zhang@mediatek.com>
Signed-off-by: default avatarRoger Lu <roger.lu@mediatek.com>
Signed-off-by: default avatarEddie Huang <eddie.huang@mediatek.com>
Acked-by: default avatarMatthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 8a340dbb

drivers/watchdog/mtk_wdt.c

+30 −0
Original line number Diff line number Diff line
@@ -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,

	},

};