watchdog: qcom: Add suspend/resume support (671cdde3) · Commits · 戴 / test

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:

Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> Reviewed-by:

Guenter Roeck <linux@roeck-us.net> Signed-off-by:

Wim Van Sebroeck <wim@linux-watchdog.org>

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);

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