diff options
Diffstat (limited to 'drivers/watchdog/s3c2410_wdt.c')
| -rw-r--r-- | drivers/watchdog/s3c2410_wdt.c | 60 |
1 files changed, 25 insertions, 35 deletions
diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c index d781000c7825..0093450441fe 100644 --- a/drivers/watchdog/s3c2410_wdt.c +++ b/drivers/watchdog/s3c2410_wdt.c @@ -41,7 +41,6 @@ #include <linux/of.h> #include <linux/mfd/syscon.h> #include <linux/regmap.h> -#include <linux/reboot.h> #include <linux/delay.h> #define S3C2410_WTCON 0x00 @@ -130,7 +129,6 @@ struct s3c2410_wdt { unsigned long wtdat_save; struct watchdog_device wdt_device; struct notifier_block freq_transition; - struct notifier_block restart_handler; struct s3c2410_wdt_variant *drv_data; struct regmap *pmureg; }; @@ -351,6 +349,29 @@ static int s3c2410wdt_set_heartbeat(struct watchdog_device *wdd, unsigned timeou return 0; } +static int s3c2410wdt_restart(struct watchdog_device *wdd) +{ + struct s3c2410_wdt *wdt = watchdog_get_drvdata(wdd); + void __iomem *wdt_base = wdt->reg_base; + + /* disable watchdog, to be safe */ + writel(0, wdt_base + S3C2410_WTCON); + + /* put initial values into count and data */ + writel(0x80, wdt_base + S3C2410_WTCNT); + writel(0x80, wdt_base + S3C2410_WTDAT); + + /* set the watchdog to go and reset... */ + writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV16 | + S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x20), + wdt_base + S3C2410_WTCON); + + /* wait for reset to assert... */ + mdelay(500); + + return 0; +} + #define OPTIONS (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE) static const struct watchdog_info s3c2410_wdt_ident = { @@ -365,6 +386,7 @@ static struct watchdog_ops s3c2410wdt_ops = { .stop = s3c2410wdt_stop, .ping = s3c2410wdt_keepalive, .set_timeout = s3c2410wdt_set_heartbeat, + .restart = s3c2410wdt_restart, }; static struct watchdog_device s3c2410_wdd = { @@ -452,31 +474,6 @@ static inline void s3c2410wdt_cpufreq_deregister(struct s3c2410_wdt *wdt) } #endif -static int s3c2410wdt_restart(struct notifier_block *this, - unsigned long mode, void *cmd) -{ - struct s3c2410_wdt *wdt = container_of(this, struct s3c2410_wdt, - restart_handler); - void __iomem *wdt_base = wdt->reg_base; - - /* disable watchdog, to be safe */ - writel(0, wdt_base + S3C2410_WTCON); - - /* put initial values into count and data */ - writel(0x80, wdt_base + S3C2410_WTCNT); - writel(0x80, wdt_base + S3C2410_WTDAT); - - /* set the watchdog to go and reset... */ - writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV16 | - S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x20), - wdt_base + S3C2410_WTCON); - - /* wait for reset to assert... */ - mdelay(500); - - return NOTIFY_DONE; -} - static inline unsigned int s3c2410wdt_get_bootstatus(struct s3c2410_wdt *wdt) { unsigned int rst_stat; @@ -605,6 +602,7 @@ static int s3c2410wdt_probe(struct platform_device *pdev) } watchdog_set_nowayout(&wdt->wdt_device, nowayout); + watchdog_set_restart_priority(&wdt->wdt_device, 128); wdt->wdt_device.bootstatus = s3c2410wdt_get_bootstatus(wdt); wdt->wdt_device.parent = &pdev->dev; @@ -632,12 +630,6 @@ static int s3c2410wdt_probe(struct platform_device *pdev) platform_set_drvdata(pdev, wdt); - wdt->restart_handler.notifier_call = s3c2410wdt_restart; - wdt->restart_handler.priority = 128; - ret = register_restart_handler(&wdt->restart_handler); - if (ret) - pr_err("cannot register restart handler, %d\n", ret); - /* print out a statement of readiness */ wtcon = readl(wdt->reg_base + S3C2410_WTCON); @@ -667,8 +659,6 @@ static int s3c2410wdt_remove(struct platform_device *dev) int ret; struct s3c2410_wdt *wdt = platform_get_drvdata(dev); - unregister_restart_handler(&wdt->restart_handler); - ret = s3c2410wdt_mask_and_disable_reset(wdt, true); if (ret < 0) return ret; |