Commit f2013532 authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Guenter Roeck
Browse files

watchdog: sama5d4: Implement resume hook 



When resuming for the deepest state on sama5d2, it is necessary to restore
MR as the registers are lost.

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 722ce635

drivers/watchdog/sama5d4_wdt.c

+17 −0
Original line number Diff line number Diff line
@@ -258,11 +258,28 @@ static const struct of_device_id sama5d4_wdt_of_match[] = { 
};

MODULE_DEVICE_TABLE(of, sama5d4_wdt_of_match);



#ifdef CONFIG_PM_SLEEP

static int sama5d4_wdt_resume(struct device *dev)

{

	struct sama5d4_wdt *wdt = dev_get_drvdata(dev);



	wdt_write(wdt, AT91_WDT_MR, wdt->mr & ~AT91_WDT_WDDIS);

	if (wdt->mr & AT91_WDT_WDDIS)

		wdt_write(wdt, AT91_WDT_MR, wdt->mr);



	return 0;

}

#endif



static SIMPLE_DEV_PM_OPS(sama5d4_wdt_pm_ops, NULL,

			 sama5d4_wdt_resume);



static struct platform_driver sama5d4_wdt_driver = {

	.probe		= sama5d4_wdt_probe,

	.remove		= sama5d4_wdt_remove,

	.driver		= {

		.name	= "sama5d4_wdt",

		.pm	= &sama5d4_wdt_pm_ops,

		.of_match_table = sama5d4_wdt_of_match,

	}

};