Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 540f6351 authored by Michael Grzeschik's avatar Michael Grzeschik Committed by Wim Van Sebroeck
Browse files

watchdog: da9062: Add restart handler support 



Register a restart handler for the da9062 watchdog.  System restart is
triggered by sending the shutdown command to the PMIC.
As more-suitable restart handlers may exist, the priority of the
watchdog restart handler is set to 128.

Signed-off-by: default avatarMichael Grzeschik <m.grzeschik@pengutronix.de>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent d5433fd6

drivers/watchdog/da9062_wdt.c

+22 −0
Original line number Diff line number Diff line
@@ -175,6 +175,25 @@ static int da9062_wdt_set_timeout(struct watchdog_device *wdd, 
	return ret;

}



static int da9062_wdt_restart(struct watchdog_device *wdd, unsigned long action,

			      void *data)

{

	struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd);

	int ret;



	ret = regmap_write(wdt->hw->regmap,

			   DA9062AA_CONTROL_F,

			   DA9062AA_SHUTDOWN_MASK);

	if (ret)

		dev_alert(wdt->hw->dev, "Failed to shutdown (err = %d)\n",

			  ret);



	/* wait for reset to assert... */

	mdelay(500);



	return ret;

}



static const struct watchdog_info da9062_watchdog_info = {

	.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,

	.identity = "DA9062 WDT",
@@ -186,6 +205,7 @@ static const struct watchdog_ops da9062_watchdog_ops = { 
	.stop = da9062_wdt_stop,

	.ping = da9062_wdt_ping,

	.set_timeout = da9062_wdt_set_timeout,

	.restart = da9062_wdt_restart,

};



static const struct of_device_id da9062_compatible_id_table[] = {
@@ -219,6 +239,8 @@ static int da9062_wdt_probe(struct platform_device *pdev) 
	wdt->wdtdev.status = WATCHDOG_NOWAYOUT_INIT_STATUS;

	wdt->wdtdev.parent = &pdev->dev;



	watchdog_set_restart_priority(&wdt->wdtdev, 128);



	watchdog_set_drvdata(&wdt->wdtdev, wdt);



	ret = devm_watchdog_register_device(&pdev->dev, &wdt->wdtdev);