watchdog: tangox: Use watchdog core to install restart handler

Use the infrastructure provided by the watchdog core to install
the restart handler.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/watchdog/tangox_wdt.c b/drivers/watchdog/tangox_wdt.c
index 202c4b9cc9212b779c9bc2145bbb9bac503c6cf6..d5fcce062920e0d1739e85b2956bd9d30b436daa 100644 (file)
--- a/drivers/watchdog/tangox_wdt.c
+++ b/drivers/watchdog/tangox_wdt.c
@@ -15,9 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
-#include <linux/notifier.h>
 #include <linux/platform_device.h>
-#include <linux/reboot.h>
 #include <linux/watchdog.h>
 
 #define DEFAULT_TIMEOUT 30
@@ -47,7 +45,6 @@ struct tangox_wdt_device {
        void __iomem *base;
        unsigned long clk_rate;
        struct clk *clk;
-       struct notifier_block restart;
 };
 
 static int tangox_wdt_set_timeout(struct watchdog_device *wdt,
@@ -96,24 +93,24 @@ static const struct watchdog_info tangox_wdt_info = {
        .identity = "tangox watchdog",
 };
 
+static int tangox_wdt_restart(struct watchdog_device *wdt,
+                             unsigned long action, void *data)
+{
+       struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
+
+       writel(1, dev->base + WD_COUNTER);
+
+       return 0;
+}
+
 static const struct watchdog_ops tangox_wdt_ops = {
        .start          = tangox_wdt_start,
        .stop           = tangox_wdt_stop,
        .set_timeout    = tangox_wdt_set_timeout,
        .get_timeleft   = tangox_wdt_get_timeleft,
+       .restart        = tangox_wdt_restart,
 };
 
-static int tangox_wdt_restart(struct notifier_block *nb, unsigned long action,
-                             void *data)
-{
-       struct tangox_wdt_device *dev =
-               container_of(nb, struct tangox_wdt_device, restart);
-
-       writel(1, dev->base + WD_COUNTER);
-
-       return NOTIFY_DONE;
-}
-
 static int tangox_wdt_probe(struct platform_device *pdev)
 {
        struct tangox_wdt_device *dev;
@@ -174,18 +171,14 @@ static int tangox_wdt_probe(struct platform_device *pdev)
                tangox_wdt_start(&dev->wdt);
        }
 
+       watchdog_set_restart_priority(&dev->wdt, 128);
+
        err = watchdog_register_device(&dev->wdt);
        if (err)
                goto err;
 
        platform_set_drvdata(pdev, dev);
 
-       dev->restart.notifier_call = tangox_wdt_restart;
-       dev->restart.priority = 128;
-       err = register_restart_handler(&dev->restart);
-       if (err)
-               dev_warn(&pdev->dev, "failed to register restart handler\n");
-
        dev_info(&pdev->dev, "SMP86xx/SMP87xx watchdog registered\n");
 
        return 0;
@@ -202,7 +195,6 @@ static int tangox_wdt_remove(struct platform_device *pdev)
        tangox_wdt_stop(&dev->wdt);
        clk_disable_unprepare(dev->clk);
 
-       unregister_restart_handler(&dev->restart);
        watchdog_unregister_device(&dev->wdt);
 
        return 0;