watchdog: imgpdc_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>

1 files changed, 12 insertions, 22 deletions

diff --git a/drivers/watchdog/imgpdc_wdt.c b/drivers/watchdog/imgpdc_wdt.c
index 15ab07230960..3679f2e1922f 100644
--- a/drivers/watchdog/imgpdc_wdt.c
+++ b/drivers/watchdog/imgpdc_wdt.c
@@ -45,7 +45,6 @@
 #include <linux/log2.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
-#include <linux/reboot.h>
 #include <linux/slab.h>
 #include <linux/watchdog.h>
 
@@ -87,7 +86,6 @@ struct pdc_wdt_dev {
         struct clk *wdt_clk;
         struct clk *sys_clk;
         void __iomem *base;
-        struct notifier_block restart_handler;
 };
 
 static int pdc_wdt_keepalive(struct watchdog_device *wdt_dev)
@@ -152,6 +150,16 @@ static int pdc_wdt_start(struct watchdog_device *wdt_dev)
         return 0;
 }
 
+static int pdc_wdt_restart(struct watchdog_device *wdt_dev)
+{
+        struct pdc_wdt_dev *wdt = watchdog_get_drvdata(wdt_dev);
+
+        /* Assert SOFT_RESET */
+        writel(0x1, wdt->base + PDC_WDT_SOFT_RESET);
+
+        return 0;
+}
+
 static struct watchdog_info pdc_wdt_info = {
         .identity       = "IMG PDC Watchdog",
         .options        = WDIOF_SETTIMEOUT |
@@ -165,20 +173,9 @@ static const struct watchdog_ops pdc_wdt_ops = {
         .stop           = pdc_wdt_stop,
         .ping           = pdc_wdt_keepalive,
         .set_timeout    = pdc_wdt_set_timeout,
+        .restart        = pdc_wdt_restart,
 };
 
-static int pdc_wdt_restart(struct notifier_block *this, unsigned long mode,
-                           void *cmd)
-{
-        struct pdc_wdt_dev *wdt = container_of(this, struct pdc_wdt_dev,
-                                               restart_handler);
-
-        /* Assert SOFT_RESET */
-        writel(0x1, wdt->base + PDC_WDT_SOFT_RESET);
-
-        return NOTIFY_OK;
-}
-
 static int pdc_wdt_probe(struct platform_device *pdev)
 {
         u64 div;
@@ -282,6 +279,7 @@ static int pdc_wdt_probe(struct platform_device *pdev)
         }
 
         watchdog_set_nowayout(&pdc_wdt->wdt_dev, nowayout);
+        watchdog_set_restart_priority(&pdc_wdt->wdt_dev, 128);
 
         platform_set_drvdata(pdev, pdc_wdt);
 
@@ -289,13 +287,6 @@ static int pdc_wdt_probe(struct platform_device *pdev)
         if (ret)
                 goto disable_wdt_clk;
 
-        pdc_wdt->restart_handler.notifier_call = pdc_wdt_restart;
-        pdc_wdt->restart_handler.priority = 128;
-        ret = register_restart_handler(&pdc_wdt->restart_handler);
-        if (ret)
-                dev_warn(&pdev->dev, "failed to register restart handler: %d\n",
-                         ret);
-
         return 0;
 
 disable_wdt_clk:
@@ -316,7 +307,6 @@ static int pdc_wdt_remove(struct platform_device *pdev)
 {
         struct pdc_wdt_dev *pdc_wdt = platform_get_drvdata(pdev);
 
-        unregister_restart_handler(&pdc_wdt->restart_handler);
         pdc_wdt_stop(&pdc_wdt->wdt_dev);
         watchdog_unregister_device(&pdc_wdt->wdt_dev);
         clk_disable_unprepare(pdc_wdt->wdt_clk);