linux-kernel - [RFC PATCH 4/5] watchdog: moxart: Register reboot handler with watchdog subsystem

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Message-Id: <1398958893-30049-5-git-send-email-linux@roeck-us.net>
Date:	Thu,  1 May 2014 08:41:32 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	linux-watchdog@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Cc:	Wim Van Sebroeck <wim@...ana.be>,
	Catalin Marinas <catalin.marinas@....com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Will Deacon <will.deacon@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Russell King <linux@....linux.org.uk>,
	Jonas Jensen <jonas.jensen@...il.com>,
	linux-kernel@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>
Subject: [RFC PATCH 4/5] watchdog: moxart: Register reboot handler with watchdog subsystem

The watchdog subsystem now provides an API to trigger a system reboot.
Register with it.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/watchdog/moxart_wdt.c |   20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/drivers/watchdog/moxart_wdt.c b/drivers/watchdog/moxart_wdt.c
index 4aa3a8a..b83646b 100644
--- a/drivers/watchdog/moxart_wdt.c
+++ b/drivers/watchdog/moxart_wdt.c
@@ -19,8 +19,6 @@
 #include <linux/watchdog.h>
 #include <linux/moduleparam.h>
 
-#include <asm/system_misc.h>
-
 #define REG_COUNT			0x4
 #define REG_MODE			0x8
 #define REG_ENABLE			0xC
@@ -31,15 +29,16 @@ struct moxart_wdt_dev {
 	unsigned int clock_frequency;
 };
 
-static struct moxart_wdt_dev *moxart_restart_ctx;
-
 static int heartbeat;
 
-static void moxart_wdt_restart(enum reboot_mode reboot_mode, const char *cmd)
+static void moxart_wdt_reboot(struct watchdog_device *wdt_dev,
+			      enum reboot_mode mode, const char *cmd)
 {
-	writel(1, moxart_restart_ctx->base + REG_COUNT);
-	writel(0x5ab9, moxart_restart_ctx->base + REG_MODE);
-	writel(0x03, moxart_restart_ctx->base + REG_ENABLE);
+	struct moxart_wdt_dev *moxart_wdt = watchdog_get_drvdata(wdt_dev);
+
+	writel(1, moxart_wdt->base + REG_COUNT);
+	writel(0x5ab9, moxart_wdt->base + REG_MODE);
+	writel(0x03, moxart_wdt->base + REG_ENABLE);
 }
 
 static int moxart_wdt_stop(struct watchdog_device *wdt_dev)
@@ -81,6 +80,7 @@ static const struct watchdog_ops moxart_wdt_ops = {
 	.owner          = THIS_MODULE,
 	.start          = moxart_wdt_start,
 	.stop           = moxart_wdt_stop,
+	.reboot		= moxart_wdt_reboot,
 	.set_timeout    = moxart_wdt_set_timeout,
 };
 
@@ -136,9 +136,6 @@ static int moxart_wdt_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
-	moxart_restart_ctx = moxart_wdt;
-	arm_pm_restart = moxart_wdt_restart;
-
 	dev_dbg(dev, "Watchdog enabled (heartbeat=%d sec, nowayout=%d)\n",
 		moxart_wdt->dev.timeout, nowayout);
 
@@ -149,7 +146,6 @@ static int moxart_wdt_remove(struct platform_device *pdev)
 {
 	struct moxart_wdt_dev *moxart_wdt = platform_get_drvdata(pdev);
 
-	arm_pm_restart = NULL;
 	moxart_wdt_stop(&moxart_wdt->dev);
 	watchdog_unregister_device(&moxart_wdt->dev);
 
-- 
1.7.9.7

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