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: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
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@ -245,6 +245,28 @@ static int qcom_wdt_remove(struct platform_device *pdev)
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return 0;
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}
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static int __maybe_unused qcom_wdt_suspend(struct device *dev)
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{
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struct qcom_wdt *wdt = dev_get_drvdata(dev);
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if (watchdog_active(&wdt->wdd))
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qcom_wdt_stop(&wdt->wdd);
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return 0;
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}
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static int __maybe_unused qcom_wdt_resume(struct device *dev)
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{
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struct qcom_wdt *wdt = dev_get_drvdata(dev);
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if (watchdog_active(&wdt->wdd))
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qcom_wdt_start(&wdt->wdd);
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(qcom_wdt_pm_ops, qcom_wdt_suspend, qcom_wdt_resume);
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static const struct of_device_id qcom_wdt_of_table[] = {
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{ .compatible = "qcom,kpss-timer", .data = reg_offset_data_apcs_tmr },
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{ .compatible = "qcom,scss-timer", .data = reg_offset_data_apcs_tmr },
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@ -259,6 +281,7 @@ static struct platform_driver qcom_watchdog_driver = {
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.driver = {
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.name = KBUILD_MODNAME,
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.of_match_table = qcom_wdt_of_table,
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.pm = &qcom_wdt_pm_ops,
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},
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};
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module_platform_driver(qcom_watchdog_driver);
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