diff options
| author | Michael Grzeschik <mgr@pengutronix.de> | 2017-10-17 17:30:22 +0200 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2017-12-28 20:45:07 +0100 |
| commit | 540f635192bb222f252724f70b9240d17742f1b1 (patch) | |
| tree | 0ccda4f99a5e023f3f054c5ee4ad1d6e7f21e358 /drivers/watchdog | |
| parent | d5433fd60df0d77b4751715e22a2dd715d26d926 (diff) | |
| download | linux-540f635192bb222f252724f70b9240d17742f1b1.tar.bz2 | |
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.c | 22 |
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); |