Merge git://www.linux-watchdog.org/linux-watchdog

Pull watchdog updates from Wim Van Sebroeck:
 "This adds following items:

   - watchdog restart handler support
   - watchdog reboot notifier support
   - watchdog sysfs attributes
   - support for the following new devices: AMD Mullins platform, AMD
     Carrizo platform, meson8b SoC, CSRatlas7, TS-4800, Alphascale
     asm9260-wdt, Zodiac, Sigma Designs SMP86xx/SMP87xx
   - Changes in refcounting for the watchdog core
   - watchdog core improvements
   - and small fixes"

* git://www.linux-watchdog.org/linux-watchdog: (60 commits)
  watchdog: asm9260: remove __init and __exit annotations
  watchdog: Drop pointer to watchdog device from struct watchdog_device
  watchdog: ziirave: Use watchdog infrastructure to create sysfs attributes
  watchdog: Add support for creating driver specific sysfs attributes
  watchdog: kill unref/ref ops
  watchdog: stmp3xxx: Remove unused variables
  watchdog: add MT7621 watchdog support
  hwmon: (sch56xx) Drop watchdog driver data reference count callbacks
  watchdog: da9055_wdt: Drop reference counting
  watchdog: da9052_wdt: Drop reference counting
  watchdog: Separate and maintain variables based on variable lifetime
  watchdog: diag288: Stop re-using watchdog core internal flags
  watchdog: Create watchdog device in watchdog_dev.c
  watchdog: qcom-wdt: Do not set 'dev' in struct watchdog_device
  watchdog: mena21: Do not use device pointer from struct watchdog_device
  watchdog: gpio: Do not use device pointer from struct watchdog_device
  watchdog: tangox: Print info message using pointer to platform device
  watchdog: bcm2835_wdt: Drop log message if watchdog is stopped
  devicetree: watchdog: add binding for Sigma Designs SMP8642 watchdog
  watchdog: add support for Sigma Designs SMP86xx/SMP87xx
  ...

1 files changed, 3 insertions, 39 deletions

diff --git a/drivers/watchdog/cadence_wdt.c b/drivers/watchdog/cadence_wdt.c
index bcfd2a2..4dda902 100644
--- a/drivers/watchdog/cadence_wdt.c
+++ b/drivers/watchdog/cadence_wdt.c
@@ -18,7 +18,6 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
-#include <linux/reboot.h>
 #include <linux/watchdog.h>
 
 #define CDNS_WDT_DEFAULT_TIMEOUT	10
@@ -72,7 +71,6 @@ MODULE_PARM_DESC(nowayout,
  * @ctrl_clksel: counter clock prescaler selection
  * @io_lock: spinlock for IO register access
  * @cdns_wdt_device: watchdog device structure
- * @cdns_wdt_notifier: notifier structure
  *
  * Structure containing parameters specific to cadence watchdog.
  */
@@ -84,7 +82,6 @@ struct cdns_wdt {
 	u32			ctrl_clksel;
 	spinlock_t		io_lock;
 	struct watchdog_device	cdns_wdt_device;
-	struct notifier_block	cdns_wdt_notifier;
 };
 
 /* Write access to Registers */
@@ -280,29 +277,6 @@ static struct watchdog_ops cdns_wdt_ops = {
 	.set_timeout = cdns_wdt_settimeout,
 };
 
-/**
- * cdns_wdt_notify_sys - Notifier for reboot or shutdown.
- *
- * @this: handle to notifier block
- * @code: turn off indicator
- * @unused: unused
- * Return: NOTIFY_DONE
- *
- * This notifier is invoked whenever the system reboot or shutdown occur
- * because we need to disable the WDT before system goes down as WDT might
- * reset on the next boot.
- */
-static int cdns_wdt_notify_sys(struct notifier_block *this, unsigned long code,
-			       void *unused)
-{
-	struct cdns_wdt *wdt = container_of(this, struct cdns_wdt,
-					    cdns_wdt_notifier);
-	if (code == SYS_DOWN || code == SYS_HALT)
-		cdns_wdt_stop(&wdt->cdns_wdt_device);
-
-	return NOTIFY_DONE;
-}
-
 /************************Platform Operations*****************************/
 /**
  * cdns_wdt_probe - Probe call for the device.
@@ -360,6 +334,7 @@ static int cdns_wdt_probe(struct platform_device *pdev)
 	}
 
 	watchdog_set_nowayout(cdns_wdt_device, nowayout);
+	watchdog_stop_on_reboot(cdns_wdt_device);
 	watchdog_set_drvdata(cdns_wdt_device, wdt);
 
 	wdt->clk = devm_clk_get(&pdev->dev, NULL);
@@ -386,14 +361,6 @@ static int cdns_wdt_probe(struct platform_device *pdev)
 
 	spin_lock_init(&wdt->io_lock);
 
-	wdt->cdns_wdt_notifier.notifier_call = &cdns_wdt_notify_sys;
-	ret = register_reboot_notifier(&wdt->cdns_wdt_notifier);
-	if (ret != 0) {
-		dev_err(&pdev->dev, "cannot register reboot notifier err=%d)\n",
-			ret);
-		goto err_clk_disable;
-	}
-
 	ret = watchdog_register_device(cdns_wdt_device);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register wdt device\n");
@@ -427,7 +394,6 @@ static int cdns_wdt_remove(struct platform_device *pdev)
 
 	cdns_wdt_stop(&wdt->cdns_wdt_device);
 	watchdog_unregister_device(&wdt->cdns_wdt_device);
-	unregister_reboot_notifier(&wdt->cdns_wdt_notifier);
 	clk_disable_unprepare(wdt->clk);
 
 	return 0;
@@ -455,8 +421,7 @@ static void cdns_wdt_shutdown(struct platform_device *pdev)
  */
 static int __maybe_unused cdns_wdt_suspend(struct device *dev)
 {
-	struct platform_device *pdev = container_of(dev,
-			struct platform_device, dev);
+	struct platform_device *pdev = to_platform_device(dev);
 	struct cdns_wdt *wdt = platform_get_drvdata(pdev);
 
 	cdns_wdt_stop(&wdt->cdns_wdt_device);
@@ -474,8 +439,7 @@ static int __maybe_unused cdns_wdt_suspend(struct device *dev)
 static int __maybe_unused cdns_wdt_resume(struct device *dev)
 {
 	int ret;
-	struct platform_device *pdev = container_of(dev,
-			struct platform_device, dev);
+	struct platform_device *pdev = to_platform_device(dev);
 	struct cdns_wdt *wdt = platform_get_drvdata(pdev);
 
 	ret = clk_prepare_enable(wdt->clk);