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authorMichael Grzeschik <mgr@pengutronix.de>2017-10-17 17:30:22 +0200
committerWim Van Sebroeck <wim@iguana.be>2017-12-28 20:45:07 +0100
commit540f635192bb222f252724f70b9240d17742f1b1 (patch)
tree0ccda4f99a5e023f3f054c5ee4ad1d6e7f21e358 /drivers/watchdog
parentd5433fd60df0d77b4751715e22a2dd715d26d926 (diff)
watchdog: da9062: Add restart handler support
Register a restart handler for the da9062 watchdog. System restart is triggered by sending the shutdown command to the PMIC. As more-suitable restart handlers may exist, the priority of the watchdog restart handler is set to 128. Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/da9062_wdt.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c
index 9083d3d922b0..4349a0221548 100644
--- a/drivers/watchdog/da9062_wdt.c
+++ b/drivers/watchdog/da9062_wdt.c
@@ -175,6 +175,25 @@ static int da9062_wdt_set_timeout(struct watchdog_device *wdd,
return ret;
}
+static int da9062_wdt_restart(struct watchdog_device *wdd, unsigned long action,
+ void *data)
+{
+ struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd);
+ int ret;
+
+ ret = regmap_write(wdt->hw->regmap,
+ DA9062AA_CONTROL_F,
+ DA9062AA_SHUTDOWN_MASK);
+ if (ret)
+ dev_alert(wdt->hw->dev, "Failed to shutdown (err = %d)\n",
+ ret);
+
+ /* wait for reset to assert... */
+ mdelay(500);
+
+ return ret;
+}
+
static const struct watchdog_info da9062_watchdog_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
.identity = "DA9062 WDT",
@@ -186,6 +205,7 @@ static const struct watchdog_ops da9062_watchdog_ops = {
.stop = da9062_wdt_stop,
.ping = da9062_wdt_ping,
.set_timeout = da9062_wdt_set_timeout,
+ .restart = da9062_wdt_restart,
};
static const struct of_device_id da9062_compatible_id_table[] = {
@@ -219,6 +239,8 @@ static int da9062_wdt_probe(struct platform_device *pdev)
wdt->wdtdev.status = WATCHDOG_NOWAYOUT_INIT_STATUS;
wdt->wdtdev.parent = &pdev->dev;
+ watchdog_set_restart_priority(&wdt->wdtdev, 128);
+
watchdog_set_drvdata(&wdt->wdtdev, wdt);
ret = devm_watchdog_register_device(&pdev->dev, &wdt->wdtdev);

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