diff options
| -rw-r--r-- | drivers/watchdog/bcm47xx_wdt.c | 69 |
1 files changed, 63 insertions, 6 deletions
diff --git a/drivers/watchdog/bcm47xx_wdt.c b/drivers/watchdog/bcm47xx_wdt.c index e3bfe25a71e..b4021a2b459 100644 --- a/drivers/watchdog/bcm47xx_wdt.c +++ b/drivers/watchdog/bcm47xx_wdt.c @@ -31,6 +31,7 @@ #define WDT_DEFAULT_TIME 30 /* seconds */ #define WDT_SOFTTIMER_MAX 255 /* seconds */ +#define WDT_SOFTTIMER_THRESHOLD 60 /* seconds */ static int timeout = WDT_DEFAULT_TIME; static bool nowayout = WATCHDOG_NOWAYOUT; @@ -49,6 +50,53 @@ static inline struct bcm47xx_wdt *bcm47xx_wdt_get(struct watchdog_device *wdd) return container_of(wdd, struct bcm47xx_wdt, wdd); } +static int bcm47xx_wdt_hard_keepalive(struct watchdog_device *wdd) +{ + struct bcm47xx_wdt *wdt = bcm47xx_wdt_get(wdd); + + wdt->timer_set_ms(wdt, wdd->timeout * 1000); + + return 0; +} + +static int bcm47xx_wdt_hard_start(struct watchdog_device *wdd) +{ + return 0; +} + +static int bcm47xx_wdt_hard_stop(struct watchdog_device *wdd) +{ + struct bcm47xx_wdt *wdt = bcm47xx_wdt_get(wdd); + + wdt->timer_set(wdt, 0); + + return 0; +} + +static int bcm47xx_wdt_hard_set_timeout(struct watchdog_device *wdd, + unsigned int new_time) +{ + struct bcm47xx_wdt *wdt = bcm47xx_wdt_get(wdd); + u32 max_timer = wdt->max_timer_ms; + + if (new_time < 1 || new_time > max_timer / 1000) { + pr_warn("timeout value must be 1<=x<=%d, using %d\n", + max_timer / 1000, new_time); + return -EINVAL; + } + + wdd->timeout = new_time; + return 0; +} + +static struct watchdog_ops bcm47xx_wdt_hard_ops = { + .owner = THIS_MODULE, + .start = bcm47xx_wdt_hard_start, + .stop = bcm47xx_wdt_hard_stop, + .ping = bcm47xx_wdt_hard_keepalive, + .set_timeout = bcm47xx_wdt_hard_set_timeout, +}; + static void bcm47xx_wdt_soft_timer_tick(unsigned long data) { struct bcm47xx_wdt *wdt = (struct bcm47xx_wdt *)data; @@ -133,15 +181,22 @@ static struct watchdog_ops bcm47xx_wdt_soft_ops = { static int bcm47xx_wdt_probe(struct platform_device *pdev) { int ret; + bool soft; struct bcm47xx_wdt *wdt = dev_get_platdata(&pdev->dev); if (!wdt) return -ENXIO; - setup_timer(&wdt->soft_timer, bcm47xx_wdt_soft_timer_tick, - (long unsigned int)wdt); + soft = wdt->max_timer_ms < WDT_SOFTTIMER_THRESHOLD * 1000; + + if (soft) { + wdt->wdd.ops = &bcm47xx_wdt_soft_ops; + setup_timer(&wdt->soft_timer, bcm47xx_wdt_soft_timer_tick, + (long unsigned int)wdt); + } else { + wdt->wdd.ops = &bcm47xx_wdt_hard_ops; + } - wdt->wdd.ops = &bcm47xx_wdt_soft_ops; wdt->wdd.info = &bcm47xx_wdt_info; wdt->wdd.timeout = WDT_DEFAULT_TIME; ret = wdt->wdd.ops->set_timeout(&wdt->wdd, timeout); @@ -159,14 +214,16 @@ static int bcm47xx_wdt_probe(struct platform_device *pdev) if (ret) goto err_notifier; - pr_info("BCM47xx Watchdog Timer enabled (%d seconds%s)\n", - timeout, nowayout ? ", nowayout" : ""); + dev_info(&pdev->dev, "BCM47xx Watchdog Timer enabled (%d seconds%s%s)\n", + timeout, nowayout ? ", nowayout" : "", + soft ? ", Software Timer" : ""); return 0; err_notifier: unregister_reboot_notifier(&wdt->notifier); err_timer: - del_timer_sync(&wdt->soft_timer); + if (soft) + del_timer_sync(&wdt->soft_timer); return ret; } |