bcm53xx: backport bcm47xx_wdt changes to 3.18 to use this driver in future

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44390 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/bcm53xx/config-3.18

@@ -52,6 +52,7 @@ CONFIG_B53=y
 CONFIG_B53_SRAB_DRIVER=y
 CONFIG_BCM47XX_NVRAM=y
 CONFIG_BCM47XX_SPROM=y
+# CONFIG_BCM47XX_WDT is not set
 CONFIG_BCMA=y
 CONFIG_BCMA_BLOCKIO=y
 CONFIG_BCMA_DEBUG=y

target/linux/bcm53xx/patches-3.18/080-watchdog-bcm47xx_wdt.c-add-restart-handler-support.patch

+From 823769d2e6622a48276bee35b2dad5ba77cbdc25 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Sun, 25 Jan 2015 11:40:57 +0100
+Subject: [PATCH] watchdog: bcm47xx_wdt.c: add restart handler support
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Just like in case of other watchdog drivers, use the new kernel core
+API to provide restart support.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+Reviewed-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
+---
+ drivers/watchdog/bcm47xx_wdt.c | 21 ++++++++++++++++++++-
+ include/linux/bcm47xx_wdt.h    |  1 +
+ 2 files changed, 21 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/watchdog/bcm47xx_wdt.c b/drivers/watchdog/bcm47xx_wdt.c
+index 9816485..b28a072 100644
+--- a/drivers/watchdog/bcm47xx_wdt.c
++++ b/drivers/watchdog/bcm47xx_wdt.c
+@@ -169,6 +169,17 @@ static int bcm47xx_wdt_notify_sys(struct notifier_block *this,
+ 	return NOTIFY_DONE;
+ }
+ 
++static int bcm47xx_wdt_restart(struct notifier_block *this, unsigned long mode,
++			       void *cmd)
++{
++	struct bcm47xx_wdt *wdt;
++
++	wdt = container_of(this, struct bcm47xx_wdt, restart_handler);
++	wdt->timer_set(wdt, 1);
++
++	return NOTIFY_DONE;
++}
++
+ static struct watchdog_ops bcm47xx_wdt_soft_ops = {
+ 	.owner		= THIS_MODULE,
+ 	.start		= bcm47xx_wdt_soft_start,
+@@ -209,15 +220,23 @@ static int bcm47xx_wdt_probe(struct platform_device *pdev)
+ 	if (ret)
+ 		goto err_timer;
+ 
+-	ret = watchdog_register_device(&wdt->wdd);
++	wdt->restart_handler.notifier_call = &bcm47xx_wdt_restart;
++	wdt->restart_handler.priority = 64;
++	ret = register_restart_handler(&wdt->restart_handler);
+ 	if (ret)
+ 		goto err_notifier;
+ 
++	ret = watchdog_register_device(&wdt->wdd);
++	if (ret)
++		goto err_handler;
++
+ 	dev_info(&pdev->dev, "BCM47xx Watchdog Timer enabled (%d seconds%s%s)\n",
+ 		timeout, nowayout ? ", nowayout" : "",
+ 		soft ? ", Software Timer" : "");
+ 	return 0;
+ 
++err_handler:
++	unregister_restart_handler(&wdt->restart_handler);
+ err_notifier:
+ 	unregister_reboot_notifier(&wdt->notifier);
+ err_timer:
+diff --git a/include/linux/bcm47xx_wdt.h b/include/linux/bcm47xx_wdt.h
+index b708786..5582c21 100644
+--- a/include/linux/bcm47xx_wdt.h
++++ b/include/linux/bcm47xx_wdt.h
+@@ -16,6 +16,7 @@ struct bcm47xx_wdt {
+ 
+ 	struct watchdog_device wdd;
+ 	struct notifier_block notifier;
++	struct notifier_block restart_handler;
+ 
+ 	struct timer_list soft_timer;
+ 	atomic_t soft_ticks;
+-- 
+1.8.4.5
+

target/linux/bcm53xx/patches-3.18/081-watchdog-bcm47xx_wdt.c-allow-enabling-on-BCM5301X-ar.patch

+From b08c144e3a1089cdb725e393fa4f68f83a73e31b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Sat, 7 Feb 2015 18:04:10 +0100
+Subject: [PATCH] watchdog: bcm47xx_wdt.c: allow enabling on BCM5301X arch
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+BCM5301X (ARCH_BCM_5301X) is a new Broadcom architecture using the same
+SoC bus driver (bcma) as BCM47XX but based on ARM instead of MIPS.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+Reviewed-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
+---
+ drivers/watchdog/Kconfig | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
+index 2aaef7b..ca6c949 100644
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -1113,7 +1113,7 @@ config ATH79_WDT
+ 
+ config BCM47XX_WDT
+ 	tristate "Broadcom BCM47xx Watchdog Timer"
+-	depends on BCM47XX
++	depends on BCM47XX || ARCH_BCM_5301X
+ 	select WATCHDOG_CORE
+ 	help
+ 	  Hardware driver for the Broadcom BCM47xx Watchdog Timer.
+-- 
+1.8.4.5
+