rtc: rtc-starfire fixes

Changes:

- remove locks, rtc class provides them
- remove unused include
- if the rtc can't handle set_time, the driver should not fake it

Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/rtc/rtc-starfire.c

@@ -6,7 +6,6 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
-#include <linux/time.h>
 #include <linux/rtc.h>
 #include <linux/platform_device.h>
 
@@ -16,11 +15,6 @@ MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 MODULE_DESCRIPTION("Starfire RTC driver");
 MODULE_LICENSE("GPL");
 
-struct starfire_rtc {
-	struct rtc_device	*rtc;
-	spinlock_t		lock;
-};
-
 static u32 starfire_get_time(void)
 {
 	static char obp_gettod[32];
@@ -35,64 +29,31 @@ static u32 starfire_get_time(void)
 
 static int starfire_read_time(struct device *dev, struct rtc_time *tm)
 {
-	struct starfire_rtc *p = dev_get_drvdata(dev);
-	unsigned long flags, secs;
-
-	spin_lock_irqsave(&p->lock, flags);
-	secs = starfire_get_time();
-	spin_unlock_irqrestore(&p->lock, flags);
-
-	rtc_time_to_tm(secs, tm);
-
-	return 0;
-}
-
-static int starfire_set_time(struct device *dev, struct rtc_time *tm)
-{
-	unsigned long secs;
-	int err;
-
-	err = rtc_tm_to_time(tm, &secs);
-	if (err)
-		return err;
-
-	/* Do nothing, time is set using the service processor
-	 * console on this platform.
-	 */
-	return 0;
+	rtc_time_to_tm(starfire_get_time(), tm);
+	return rtc_valid_tm(tm);
 }
 
 static const struct rtc_class_ops starfire_rtc_ops = {
 	.read_time	= starfire_read_time,
-	.set_time	= starfire_set_time,
 };
 
-static int __devinit starfire_rtc_probe(struct platform_device *pdev)
+static int __init starfire_rtc_probe(struct platform_device *pdev)
 {
-	struct starfire_rtc *p = kzalloc(sizeof(*p), GFP_KERNEL);
-
-	if (!p)
-		return -ENOMEM;
-
-	spin_lock_init(&p->lock);
-
-	p->rtc = rtc_device_register("starfire", &pdev->dev,
+	struct rtc_device *rtc = rtc_device_register("starfire", &pdev->dev,
 				     &starfire_rtc_ops, THIS_MODULE);
-	if (IS_ERR(p->rtc)) {
-		int err = PTR_ERR(p->rtc);
-		kfree(p);
-		return err;
-	}
-	platform_set_drvdata(pdev, p);
+	if (IS_ERR(rtc))
+		return PTR_ERR(rtc);
+
+	platform_set_drvdata(pdev, rtc);
+
 	return 0;
 }
 
-static int __devexit starfire_rtc_remove(struct platform_device *pdev)
+static int __exit starfire_rtc_remove(struct platform_device *pdev)
 {
-	struct starfire_rtc *p = platform_get_drvdata(pdev);
+	struct rtc_device *rtc = platform_get_drvdata(pdev);
 
-	rtc_device_unregister(p->rtc);
-	kfree(p);
+	rtc_device_unregister(rtc);
 
 	return 0;
 }
@@ -102,13 +63,12 @@ static struct platform_driver starfire_rtc_driver = {
 		.name	= "rtc-starfire",
 		.owner	= THIS_MODULE,
 	},
-	.probe		= starfire_rtc_probe,
-	.remove		= __devexit_p(starfire_rtc_remove),
+	.remove		= __exit_p(starfire_rtc_remove),
 };
 
 static int __init starfire_rtc_init(void)
 {
-	return platform_driver_register(&starfire_rtc_driver);
+	return platform_driver_probe(&starfire_rtc_driver, starfire_rtc_probe);
 }
 
 static void __exit starfire_rtc_exit(void)