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| author | Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> | 2019-01-17 20:49:42 +0530 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2019-02-02 14:06:36 +0100 |
| commit | 671cdde36e26feb509e5cc25c0ca273907eaf914 (patch) | |
| tree | c435e522d68fd1e57bc4b886213c4b245085f7d9 /drivers/watchdog/qcom-wdt.c | |
| parent | f17b5f06cb92ef2250513a1e154c47b78df07d40 (diff) | |
| download | linux-671cdde36e26feb509e5cc25c0ca273907eaf914.tar.gz | |
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>
Diffstat (limited to 'drivers/watchdog/qcom-wdt.c')
| -rw-r--r-- | drivers/watchdog/qcom-wdt.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c index 780971318810..5dfd604477a4 100644 --- a/drivers/watchdog/qcom-wdt.c +++ b/drivers/watchdog/qcom-wdt.c @@ -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); |