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From: Loic Poulain <loic.poulain@linaro.org>
To: linux@roeck-us.net
Cc: linux-watchdog@vger.kernel.org, Loic Poulain <loic.poulain@linaro.org>
Subject: [PATCH] watchdog: pm8916_wdt: Add system sleep callbacks
Date: Tue, 11 Feb 2020 16:38:03 +0100
Message-ID: <1581435483-6796-1-git-send-email-loic.poulain@linaro.org> (raw)

Add suspend and resume pm operations.
Tested on dragonboard-410c.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
---
 drivers/watchdog/pm8916_wdt.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/watchdog/pm8916_wdt.c b/drivers/watchdog/pm8916_wdt.c
index 1213179..0937b8d3 100644
--- a/drivers/watchdog/pm8916_wdt.c
+++ b/drivers/watchdog/pm8916_wdt.c
@@ -192,6 +192,7 @@ static int pm8916_wdt_probe(struct platform_device *pdev)
 	wdt->wdev.timeout = PM8916_WDT_DEFAULT_TIMEOUT;
 	wdt->wdev.pretimeout = 0;
 	watchdog_set_drvdata(&wdt->wdev, wdt);
+	platform_set_drvdata(pdev, wdt);
 
 	watchdog_init_timeout(&wdt->wdev, 0, dev);
 	pm8916_wdt_configure_timers(&wdt->wdev);
@@ -199,6 +200,29 @@ static int pm8916_wdt_probe(struct platform_device *pdev)
 	return devm_watchdog_register_device(dev, &wdt->wdev);
 }
 
+static int __maybe_unused pm8916_wdt_suspend(struct device *dev)
+{
+	struct pm8916_wdt *wdt = dev_get_drvdata(dev);
+
+	if (watchdog_active(&wdt->wdev))
+		return pm8916_wdt_stop(&wdt->wdev);
+
+	return 0;
+}
+
+static int __maybe_unused pm8916_wdt_resume(struct device *dev)
+{
+	struct pm8916_wdt *wdt = dev_get_drvdata(dev);
+
+	if (watchdog_active(&wdt->wdev))
+		return pm8916_wdt_start(&wdt->wdev);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(pm8916_wdt_pm_ops, pm8916_wdt_suspend,
+			 pm8916_wdt_resume);
+
 static const struct of_device_id pm8916_wdt_id_table[] = {
 	{ .compatible = "qcom,pm8916-wdt" },
 	{ }
@@ -210,6 +234,7 @@ static struct platform_driver pm8916_wdt_driver = {
 	.driver = {
 		.name = "pm8916-wdt",
 		.of_match_table = of_match_ptr(pm8916_wdt_id_table),
+		.pm = &pm8916_wdt_pm_ops,
 	},
 };
 module_platform_driver(pm8916_wdt_driver);
-- 
2.7.4


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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11 15:38 Loic Poulain [this message]
2020-02-11 15:51 ` Guenter Roeck

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