watchdog: mtk_wdt: use core restart handler

Get rid of the custom restart handler by using the one provided by the
watchdog core.

Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index b751f43..b78776c 100644 (file)
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -28,8 +28,6 @@
 #include <linux/platform_device.h>
 #include <linux/types.h>
 #include <linux/watchdog.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
 #include <linux/delay.h>
 
 #define WDT_MAX_TIMEOUT                31
@@ -64,16 +62,13 @@ static unsigned int timeout = WDT_MAX_TIMEOUT;
 struct mtk_wdt_dev {
        struct watchdog_device wdt_dev;
        void __iomem *wdt_base;
-       struct notifier_block restart_handler;
 };
 
-static int mtk_reset_handler(struct notifier_block *this, unsigned long mode,
-                               void *cmd)
+static int mtk_wdt_restart(struct watchdog_device *wdt_dev)
 {
-       struct mtk_wdt_dev *mtk_wdt;
+       struct mtk_wdt_dev *mtk_wdt = watchdog_get_drvdata(wdt_dev);
        void __iomem *wdt_base;
 
-       mtk_wdt = container_of(this, struct mtk_wdt_dev, restart_handler);
        wdt_base = mtk_wdt->wdt_base;
 
        while (1) {
@@ -81,7 +76,7 @@ static int mtk_reset_handler(struct notifier_block *this, unsigned long mode,
                mdelay(5);
        }
 
-       return NOTIFY_DONE;
+       return 0;
 }
 
 static int mtk_wdt_ping(struct watchdog_device *wdt_dev)
@@ -161,6 +156,7 @@ static const struct watchdog_ops mtk_wdt_ops = {
        .stop           = mtk_wdt_stop,
        .ping           = mtk_wdt_ping,
        .set_timeout    = mtk_wdt_set_timeout,
+       .restart        = mtk_wdt_restart,
 };
 
 static int mtk_wdt_probe(struct platform_device *pdev)
@@ -189,6 +185,7 @@ static int mtk_wdt_probe(struct platform_device *pdev)
 
        watchdog_init_timeout(&mtk_wdt->wdt_dev, timeout, &pdev->dev);
        watchdog_set_nowayout(&mtk_wdt->wdt_dev, nowayout);
+       watchdog_set_restart_priority(&mtk_wdt->wdt_dev, 128);
 
        watchdog_set_drvdata(&mtk_wdt->wdt_dev, mtk_wdt);
 
@@ -198,13 +195,6 @@ static int mtk_wdt_probe(struct platform_device *pdev)
        if (unlikely(err))
                return err;
 
-       mtk_wdt->restart_handler.notifier_call = mtk_reset_handler;
-       mtk_wdt->restart_handler.priority = 128;
-       err = register_restart_handler(&mtk_wdt->restart_handler);
-       if (err)
-               dev_warn(&pdev->dev,
-                       "cannot register restart handler (err=%d)\n", err);
-
        dev_info(&pdev->dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)\n",
                        mtk_wdt->wdt_dev.timeout, nowayout);
 
@@ -223,8 +213,6 @@ static int mtk_wdt_remove(struct platform_device *pdev)
 {
        struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
 
-       unregister_restart_handler(&mtk_wdt->restart_handler);
-
        watchdog_unregister_device(&mtk_wdt->wdt_dev);
 
        return 0;