watchdog: s3c2410_wdt: convert s3c2410wdt to dev_pm_ops

Instead of using legacy suspend/resume methods, using newer
dev_pm_ops structure allows better control over power management.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index c3beb3a..6a22cf5 100644 (file)
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -448,12 +448,12 @@ static void s3c2410wdt_shutdown(struct platform_device *dev)
        s3c2410wdt_stop(&s3c2410_wdd);
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 
 static unsigned long wtcon_save;
 static unsigned long wtdat_save;
 
-static int s3c2410wdt_suspend(struct platform_device *dev, pm_message_t state)
+static int s3c2410wdt_suspend(struct device *dev)
 {
        /* Save watchdog state, and turn it off. */
        wtcon_save = readl(wdt_base + S3C2410_WTCON);
@@ -465,7 +465,7 @@ static int s3c2410wdt_suspend(struct platform_device *dev, pm_message_t state)
        return 0;
 }
 
-static int s3c2410wdt_resume(struct platform_device *dev)
+static int s3c2410wdt_resume(struct device *dev)
 {
        /* Restore watchdog state. */
 
@@ -473,16 +473,15 @@ static int s3c2410wdt_resume(struct platform_device *dev)
        writel(wtdat_save, wdt_base + S3C2410_WTCNT); /* Reset count */
        writel(wtcon_save, wdt_base + S3C2410_WTCON);
 
-       dev_info(&dev->dev, "watchdog %sabled\n",
+       dev_info(dev, "watchdog %sabled\n",
                (wtcon_save & S3C2410_WTCON_ENABLE) ? "en" : "dis");
 
        return 0;
 }
+#endif
 
-#else
-#define s3c2410wdt_suspend NULL
-#define s3c2410wdt_resume  NULL
-#endif /* CONFIG_PM */
+static SIMPLE_DEV_PM_OPS(s3c2410wdt_pm_ops, s3c2410wdt_suspend,
+                       s3c2410wdt_resume);
 
 #ifdef CONFIG_OF
 static const struct of_device_id s3c2410_wdt_match[] = {
@@ -496,11 +495,10 @@ static struct platform_driver s3c2410wdt_driver = {
        .probe          = s3c2410wdt_probe,
        .remove         = s3c2410wdt_remove,
        .shutdown       = s3c2410wdt_shutdown,
-       .suspend        = s3c2410wdt_suspend,
-       .resume         = s3c2410wdt_resume,
        .driver         = {
                .owner  = THIS_MODULE,
                .name   = "s3c2410-wdt",
+               .pm     = &s3c2410wdt_pm_ops,
                .of_match_table = of_match_ptr(s3c2410_wdt_match),
        },
 };