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

Commit 671cdde3 authored by Sai Prakash Ranjan's avatar Sai Prakash Ranjan Committed by Wim Van Sebroeck
Browse files

watchdog: qcom: Add suspend/resume support 



This adds the support for qcom watchdog suspend and resume
when entering and exiting deep sleep states. Otherwise
having watchdog active after suspend would result in unwanted
crashes/resets if resume happens after a long time.

Signed-off-by: default avatarSai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
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@linux-watchdog.org>
parent f17b5f06

drivers/watchdog/qcom-wdt.c

+23 −0
Original line number Diff line number Diff line
@@ -245,6 +245,28 @@ static int qcom_wdt_remove(struct platform_device *pdev) 
	return 0;

}



static int __maybe_unused qcom_wdt_suspend(struct device *dev)

{

	struct qcom_wdt *wdt = dev_get_drvdata(dev);



	if (watchdog_active(&wdt->wdd))

		qcom_wdt_stop(&wdt->wdd);



	return 0;

}



static int __maybe_unused qcom_wdt_resume(struct device *dev)

{

	struct qcom_wdt *wdt = dev_get_drvdata(dev);



	if (watchdog_active(&wdt->wdd))

		qcom_wdt_start(&wdt->wdd);



	return 0;

}



static SIMPLE_DEV_PM_OPS(qcom_wdt_pm_ops, qcom_wdt_suspend, qcom_wdt_resume);



static const struct of_device_id qcom_wdt_of_table[] = {

	{ .compatible = "qcom,kpss-timer", .data = reg_offset_data_apcs_tmr },

	{ .compatible = "qcom,scss-timer", .data = reg_offset_data_apcs_tmr },
@@ -259,6 +281,7 @@ static struct platform_driver qcom_watchdog_driver = { 
	.driver	= {

		.name		= KBUILD_MODNAME,

		.of_match_table	= qcom_wdt_of_table,

		.pm		= &qcom_wdt_pm_ops,

	},

};

module_platform_driver(qcom_watchdog_driver);