diff options
Diffstat (limited to 'drivers/watchdog/stmp3xxx_rtc_wdt.c')
| -rw-r--r-- | drivers/watchdog/stmp3xxx_rtc_wdt.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/watchdog/stmp3xxx_rtc_wdt.c b/drivers/watchdog/stmp3xxx_rtc_wdt.c index 3ee6128a540e..dbe03725c778 100644 --- a/drivers/watchdog/stmp3xxx_rtc_wdt.c +++ b/drivers/watchdog/stmp3xxx_rtc_wdt.c @@ -14,6 +14,8 @@ #include <linux/watchdog.h> #include <linux/platform_device.h> #include <linux/stmp3xxx_rtc_wdt.h> +#include <linux/notifier.h> +#include <linux/reboot.h> #define WDOG_TICK_RATE 1000 /* 1 kHz clock */ #define STMP3XXX_DEFAULT_TIMEOUT 19 @@ -69,6 +71,28 @@ static struct watchdog_device stmp3xxx_wdd = { .status = WATCHDOG_NOWAYOUT_INIT_STATUS, }; +static int wdt_notify_sys(struct notifier_block *nb, unsigned long code, + void *unused) +{ + struct device *dev = watchdog_get_drvdata(&stmp3xxx_wdd); + struct stmp3xxx_wdt_pdata *pdata = dev_get_platdata(dev); + + switch (code) { + case SYS_DOWN: /* keep enabled, system might crash while going down */ + break; + case SYS_HALT: /* allow the system to actually halt */ + case SYS_POWER_OFF: + wdt_stop(&stmp3xxx_wdd); + break; + } + + return NOTIFY_DONE; +} + +static struct notifier_block wdt_notifier = { + .notifier_call = wdt_notify_sys, +}; + static int stmp3xxx_wdt_probe(struct platform_device *pdev) { int ret; @@ -84,6 +108,9 @@ static int stmp3xxx_wdt_probe(struct platform_device *pdev) return ret; } + if (register_reboot_notifier(&wdt_notifier)) + dev_warn(&pdev->dev, "cannot register reboot notifier\n"); + dev_info(&pdev->dev, "initialized watchdog with heartbeat %ds\n", stmp3xxx_wdd.timeout); return 0; @@ -91,6 +118,7 @@ static int stmp3xxx_wdt_probe(struct platform_device *pdev) static int stmp3xxx_wdt_remove(struct platform_device *pdev) { + unregister_reboot_notifier(&wdt_notifier); watchdog_unregister_device(&stmp3xxx_wdd); return 0; } |