Merge branch 'akpm/master'

76 files changed, 431 insertions, 808 deletions

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 9b742d3ffb94..66385402d20e 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -259,6 +259,76 @@ void rtc_device_unregister(struct rtc_device *rtc)
 }
 EXPORT_SYMBOL_GPL(rtc_device_unregister);
 
+static void devm_rtc_device_release(struct device *dev, void *res)
+{
+	struct rtc_device *rtc = *(struct rtc_device **)res;
+
+	rtc_device_unregister(rtc);
+}
+
+static int devm_rtc_device_match(struct device *dev, void *res, void *data)
+{
+	struct rtc **r = res;
+
+	return *r == data;
+}
+
+/**
+ * devm_rtc_device_register - resource managed rtc_device_register()
+ * @dev: the device to register
+ * @name: the name of the device
+ * @ops: the rtc operations structure
+ * @owner: the module owner
+ *
+ * @return a struct rtc on success, or an ERR_PTR on error
+ *
+ * Managed rtc_device_register(). The rtc_device returned from this function
+ * are automatically freed on driver detach. See rtc_device_register()
+ * for more information.
+ */
+
+struct rtc_device *devm_rtc_device_register(struct device *dev,
+					const char *name,
+					const struct rtc_class_ops *ops,
+					struct module *owner)
+{
+	struct rtc_device **ptr, *rtc;
+
+	ptr = devres_alloc(devm_rtc_device_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return ERR_PTR(-ENOMEM);
+
+	rtc = rtc_device_register(name, dev, ops, owner);
+	if (!IS_ERR(rtc)) {
+		*ptr = rtc;
+		devres_add(dev, ptr);
+	} else {
+		devres_free(ptr);
+	}
+
+	return rtc;
+}
+EXPORT_SYMBOL_GPL(devm_rtc_device_register);
+
+/**
+ * devm_rtc_device_unregister - resource managed devm_rtc_device_unregister()
+ * @dev: the device to unregister
+ * @rtc: the RTC class device to unregister
+ *
+ * Deallocated a rtc allocated with devm_rtc_device_register(). Normally this
+ * function will not need to be called and the resource management code will
+ * ensure that the resource is freed.
+ */
+void devm_rtc_device_unregister(struct device *dev, struct rtc_device *rtc)
+{
+	int rc;
+
+	rc = devres_release(dev, devm_rtc_device_release,
+				devm_rtc_device_match, rtc);
+	WARN_ON(rc);
+}
+EXPORT_SYMBOL_GPL(devm_rtc_device_unregister);
+
 static int __init rtc_init(void)
 {
 	rtc_class = class_create(THIS_MODULE, "rtc");
diff --git a/drivers/rtc/rtc-88pm80x.c b/drivers/rtc/rtc-88pm80x.c
index 63b17ebe90e8..76f9505ff7c5 100644
--- a/drivers/rtc/rtc-88pm80x.c
+++ b/drivers/rtc/rtc-88pm80x.c
@@ -312,7 +312,7 @@ static int pm80x_rtc_probe(struct platform_device *pdev)
 	}
 	rtc_tm_to_time(&tm, &ticks);
 
-	info->rtc_dev = rtc_device_register("88pm80x-rtc", &pdev->dev,
+	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "88pm80x-rtc",
 					    &pm80x_rtc_ops, THIS_MODULE);
 	if (IS_ERR(info->rtc_dev)) {
 		ret = PTR_ERR(info->rtc_dev);
@@ -346,7 +346,6 @@ static int pm80x_rtc_remove(struct platform_device *pdev)
 {
 	struct pm80x_rtc_info *info = platform_get_drvdata(pdev);
 	platform_set_drvdata(pdev, NULL);
-	rtc_device_unregister(info->rtc_dev);
 	pm80x_free_irq(info->chip, info->irq, info);
 	return 0;
 }
diff --git a/drivers/rtc/rtc-ab3100.c b/drivers/rtc/rtc-ab3100.c
index 261a07e0fb24..47a4f2c4d30e 100644
--- a/drivers/rtc/rtc-ab3100.c
+++ b/drivers/rtc/rtc-ab3100.c
@@ -229,8 +229,8 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev)
 		/* Ignore any error on this write */
 	}
 
-	rtc = rtc_device_register("ab3100-rtc", &pdev->dev, &ab3100_rtc_ops,
-				  THIS_MODULE);
+	rtc = devm_rtc_device_register(&pdev->dev, "ab3100-rtc",
+					&ab3100_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc)) {
 		err = PTR_ERR(rtc);
 		return err;
@@ -242,9 +242,6 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev)
 
 static int __exit ab3100_rtc_remove(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtc);
 	platform_set_drvdata(pdev, NULL);
 	return 0;
 }
@@ -257,19 +254,7 @@ static struct platform_driver ab3100_rtc_driver = {
 	.remove	 = __exit_p(ab3100_rtc_remove),
 };
 
-static int __init ab3100_rtc_init(void)
-{
-	return platform_driver_probe(&ab3100_rtc_driver,
-				     ab3100_rtc_probe);
-}
-
-static void __exit ab3100_rtc_exit(void)
-{
-	platform_driver_unregister(&ab3100_rtc_driver);
-}
-
-module_init(ab3100_rtc_init);
-module_exit(ab3100_rtc_exit);
+module_platform_driver_probe(ab3100_rtc_driver, ab3100_rtc_probe);
 
 MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
 MODULE_DESCRIPTION("AB3100 RTC Driver");
diff --git a/drivers/rtc/rtc-at32ap700x.c b/drivers/rtc/rtc-at32ap700x.c
index 8dd08305aae1..619c8877f2f1 100644
--- a/drivers/rtc/rtc-at32ap700x.c
+++ b/drivers/rtc/rtc-at32ap700x.c
@@ -302,17 +302,7 @@ static struct platform_driver at32_rtc_driver = {
 	},
 };
 
-static int __init at32_rtc_init(void)
-{
-	return platform_driver_probe(&at32_rtc_driver, at32_rtc_probe);
-}
-module_init(at32_rtc_init);
-
-static void __exit at32_rtc_exit(void)
-{
-	platform_driver_unregister(&at32_rtc_driver);
-}
-module_exit(at32_rtc_exit);
+module_platform_driver_probe(at32_rtc_driver, at32_rtc_probe);
 
 MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
 MODULE_DESCRIPTION("Real time clock for AVR32 AT32AP700x");
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 434ebc3a99dc..f07bd318260c 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -337,7 +337,7 @@ static int __exit at91_rtc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 
 /* AT91RM9200 RTC Power management control */
 
@@ -369,39 +369,20 @@ static int at91_rtc_resume(struct device *dev)
 	}
 	return 0;
 }
-
-static const struct dev_pm_ops at91_rtc_pm = {
-	.suspend =	at91_rtc_suspend,
-	.resume =	at91_rtc_resume,
-};
-
-#define at91_rtc_pm_ptr	&at91_rtc_pm
-
-#else
-#define at91_rtc_pm_ptr	NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
+
 static struct platform_driver at91_rtc_driver = {
 	.remove		= __exit_p(at91_rtc_remove),
 	.driver		= {
 		.name	= "at91_rtc",
 		.owner	= THIS_MODULE,
-		.pm	= at91_rtc_pm_ptr,
+		.pm	= &at91_rtc_pm_ops,
 	},
 };
 
-static int __init at91_rtc_init(void)
-{
-	return platform_driver_probe(&at91_rtc_driver, at91_rtc_probe);
-}
-
-static void __exit at91_rtc_exit(void)
-{
-	platform_driver_unregister(&at91_rtc_driver);
-}
-
-module_init(at91_rtc_init);
-module_exit(at91_rtc_exit);
+module_platform_driver_probe(at91_rtc_driver, at91_rtc_probe);
 
 MODULE_AUTHOR("Rick Bronson");
 MODULE_DESCRIPTION("RTC driver for Atmel AT91RM9200");
diff --git a/drivers/rtc/rtc-au1xxx.c b/drivers/rtc/rtc-au1xxx.c
index b309da4ec745..7995abc391fc 100644
--- a/drivers/rtc/rtc-au1xxx.c
+++ b/drivers/rtc/rtc-au1xxx.c
@@ -101,7 +101,7 @@ static int au1xtoy_rtc_probe(struct platform_device *pdev)
 	while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_C0S)
 		msleep(1);
 
-	rtcdev = rtc_device_register("rtc-au1xxx", &pdev->dev,
+	rtcdev = devm_rtc_device_register(&pdev->dev, "rtc-au1xxx",
 				     &au1xtoy_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtcdev)) {
 		ret = PTR_ERR(rtcdev);
@@ -118,9 +118,6 @@ out_err:
 
 static int au1xtoy_rtc_remove(struct platform_device *pdev)
 {
-	struct rtc_device *rtcdev = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtcdev);
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
@@ -134,18 +131,7 @@ static struct platform_driver au1xrtc_driver = {
 	.remove		= au1xtoy_rtc_remove,
 };
 
-static int __init au1xtoy_rtc_init(void)
-{
-	return platform_driver_probe(&au1xrtc_driver, au1xtoy_rtc_probe);
-}
-
-static void __exit au1xtoy_rtc_exit(void)
-{
-	platform_driver_unregister(&au1xrtc_driver);
-}
-
-module_init(au1xtoy_rtc_init);
-module_exit(au1xtoy_rtc_exit);
+module_platform_driver_probe(au1xrtc_driver, au1xtoy_rtc_probe);
 
 MODULE_DESCRIPTION("Au1xxx TOY-counter-based RTC driver");
 MODULE_AUTHOR("Manuel Lauss <manuel.lauss@gmail.com>");
diff --git a/drivers/rtc/rtc-bq32k.c b/drivers/rtc/rtc-bq32k.c
index 036cb89f8188..fea78bc713ca 100644
--- a/drivers/rtc/rtc-bq32k.c
+++ b/drivers/rtc/rtc-bq32k.c
@@ -153,7 +153,7 @@ static int bq32k_probe(struct i2c_client *client,
 	if (error)
 		return error;
 
-	rtc = rtc_device_register(bq32k_driver.driver.name, &client->dev,
+	rtc = devm_rtc_device_register(&client->dev, bq32k_driver.driver.name,
 						&bq32k_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -165,9 +165,6 @@ static int bq32k_probe(struct i2c_client *client,
 
 static int bq32k_remove(struct i2c_client *client)
 {
-	struct rtc_device *rtc = i2c_get_clientdata(client);
-
-	rtc_device_unregister(rtc);
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c
index 2d28ec1aa1cd..bf0387f80d2d 100644
--- a/drivers/rtc/rtc-coh901331.c
+++ b/drivers/rtc/rtc-coh901331.c
@@ -155,7 +155,6 @@ static int __exit coh901331_remove(struct platform_device *pdev)
 	struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
 
 	if (rtap) {
-		rtc_device_unregister(rtap->rtc);
 		clk_unprepare(rtap->clk);
 		platform_set_drvdata(pdev, NULL);
 	}
@@ -211,8 +210,8 @@ static int __init coh901331_probe(struct platform_device *pdev)
 	clk_disable(rtap->clk);
 
 	platform_set_drvdata(pdev, rtap);
-	rtap->rtc = rtc_device_register("coh901331", &pdev->dev, &coh901331_ops,
-					 THIS_MODULE);
+	rtap->rtc = devm_rtc_device_register(&pdev->dev, "coh901331",
+					&coh901331_ops, THIS_MODULE);
 	if (IS_ERR(rtap->rtc)) {
 		ret = PTR_ERR(rtap->rtc);
 		goto out_no_rtc;
@@ -287,18 +286,7 @@ static struct platform_driver coh901331_driver = {
 	.shutdown = coh901331_shutdown,
 };
 
-static int __init coh901331_init(void)
-{
-	return platform_driver_probe(&coh901331_driver, coh901331_probe);
-}
-
-static void __exit coh901331_exit(void)
-{
-	platform_driver_unregister(&coh901331_driver);
-}
-
-module_init(coh901331_init);
-module_exit(coh901331_exit);
+module_platform_driver_probe(coh901331_driver, coh901331_probe);
 
 MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
 MODULE_DESCRIPTION("ST-Ericsson AB COH 901 331 RTC Driver");
diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c
index 0dde688ca09b..7286b279cf2d 100644
--- a/drivers/rtc/rtc-da9052.c
+++ b/drivers/rtc/rtc-da9052.c
@@ -239,17 +239,15 @@ static int da9052_rtc_probe(struct platform_device *pdev)
 
 	rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
 	platform_set_drvdata(pdev, rtc);
-	rtc->irq = platform_get_irq_byname(pdev, "ALM");
-	ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL,
-				da9052_rtc_irq,
-				IRQF_TRIGGER_LOW | IRQF_ONESHOT,
-				"ALM", rtc);
+	rtc->irq =  DA9052_IRQ_ALARM;
+	ret = da9052_request_irq(rtc->da9052, rtc->irq, "ALM",
+				da9052_rtc_irq, rtc);
 	if (ret != 0) {
 		rtc_err(rtc->da9052, "irq registration failed: %d\n", ret);
 		return ret;
 	}
 
-	rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				       &da9052_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc->rtc))
 		return PTR_ERR(rtc->rtc);
@@ -259,9 +257,6 @@ static int da9052_rtc_probe(struct platform_device *pdev)
 
 static int da9052_rtc_remove(struct platform_device *pdev)
 {
-	struct da9052_rtc *rtc = pdev->dev.platform_data;
-
-	rtc_device_unregister(rtc->rtc);
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
diff --git a/drivers/rtc/rtc-da9055.c b/drivers/rtc/rtc-da9055.c
index 8f0dcfedb83c..73858ca9709a 100644
--- a/drivers/rtc/rtc-da9055.c
+++ b/drivers/rtc/rtc-da9055.c
@@ -294,7 +294,7 @@ static int da9055_rtc_probe(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 					&da9055_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc->rtc)) {
 		ret = PTR_ERR(rtc->rtc);
@@ -317,9 +317,6 @@ err_rtc:
 
 static int da9055_rtc_remove(struct platform_device *pdev)
 {
-	struct da9055_rtc *rtc = pdev->dev.platform_data;
-
-	rtc_device_unregister(rtc->rtc);
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
diff --git a/drivers/rtc/rtc-davinci.c b/drivers/rtc/rtc-davinci.c
index 56b73089bb29..a55048c3e26f 100644
--- a/drivers/rtc/rtc-davinci.c
+++ b/drivers/rtc/rtc-davinci.c
@@ -523,7 +523,7 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, davinci_rtc);
 
-	davinci_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	davinci_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				    &davinci_rtc_ops, THIS_MODULE);
 	if (IS_ERR(davinci_rtc->rtc)) {
 		ret = PTR_ERR(davinci_rtc->rtc);
@@ -543,7 +543,7 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 			  0, "davinci_rtc", davinci_rtc);
 	if (ret < 0) {
 		dev_err(dev, "unable to register davinci RTC interrupt\n");
-		goto fail2;
+		goto fail1;
 	}
 
 	/* Enable interrupts */
@@ -557,14 +557,12 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 
 	return 0;
 
-fail2:
-	rtc_device_unregister(davinci_rtc->rtc);
 fail1:
 	platform_set_drvdata(pdev, NULL);
 	return ret;
 }
 
-static int davinci_rtc_remove(struct platform_device *pdev)
+static int __exit davinci_rtc_remove(struct platform_device *pdev)
 {
 	struct davinci_rtc *davinci_rtc = platform_get_drvdata(pdev);
 
@@ -572,8 +570,6 @@ static int davinci_rtc_remove(struct platform_device *pdev)
 
 	rtcif_write(davinci_rtc, 0, PRTCIF_INTEN);
 
-	rtc_device_unregister(davinci_rtc->rtc);
-
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
@@ -581,24 +577,14 @@ static int davinci_rtc_remove(struct platform_device *pdev)
 
 static struct platform_driver davinci_rtc_driver = {
 	.probe		= davinci_rtc_probe,
-	.remove		= davinci_rtc_remove,
+	.remove		= __exit_p(davinci_rtc_remove),
 	.driver		= {
 		.name = "rtc_davinci",
 		.owner = THIS_MODULE,
 	},
 };
 
-static int __init rtc_init(void)
-{
-	return platform_driver_probe(&davinci_rtc_driver, davinci_rtc_probe);
-}
-module_init(rtc_init);
-
-static void __exit rtc_exit(void)
-{
-	platform_driver_unregister(&davinci_rtc_driver);
-}
-module_exit(rtc_exit);
+module_platform_driver_probe(davinci_rtc_driver, davinci_rtc_probe);
 
 MODULE_AUTHOR("Miguel Aguilar <miguel.aguilar@ridgerun.com>");
 MODULE_DESCRIPTION("Texas Instruments DaVinci PRTC Driver");
diff --git a/drivers/rtc/rtc-dm355evm.c b/drivers/rtc/rtc-dm355evm.c
index b2ed2c94b081..1e1ca63d58a9 100644
--- a/drivers/rtc/rtc-dm355evm.c
+++ b/drivers/rtc/rtc-dm355evm.c
@@ -127,8 +127,8 @@ static int dm355evm_rtc_probe(struct platform_device *pdev)
 {
 	struct rtc_device *rtc;
 
-	rtc = rtc_device_register(pdev->name,
-				  &pdev->dev, &dm355evm_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+					&dm355evm_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc)) {
 		dev_err(&pdev->dev, "can't register RTC device, err %ld\n",
 			PTR_ERR(rtc));
@@ -141,9 +141,6 @@ static int dm355evm_rtc_probe(struct platform_device *pdev)
 
 static int dm355evm_rtc_remove(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtc);
 	platform_set_drvdata(pdev, NULL);
 	return 0;
 }
diff --git a/drivers/rtc/rtc-ds1286.c b/drivers/rtc/rtc-ds1286.c
index d989412a348a..d120cb8bfcbe 100644
--- a/drivers/rtc/rtc-ds1286.c
+++ b/drivers/rtc/rtc-ds1286.c
@@ -270,7 +270,6 @@ static int ds1286_set_time(struct device *dev, struct rtc_time *tm)
 static int ds1286_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 {
 	struct ds1286_priv *priv = dev_get_drvdata(dev);
-	unsigned char cmd;
 	unsigned long flags;
 
 	/*
@@ -281,7 +280,7 @@ static int ds1286_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 	alm->time.tm_min = ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x7f;
 	alm->time.tm_hour = ds1286_rtc_read(priv, RTC_HOURS_ALARM)  & 0x1f;
 	alm->time.tm_wday = ds1286_rtc_read(priv, RTC_DAY_ALARM)    & 0x07;
-	cmd = ds1286_rtc_read(priv, RTC_CMD);
+	ds1286_rtc_read(priv, RTC_CMD);
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	alm->time.tm_min = bcd2bin(alm->time.tm_min);
diff --git a/drivers/rtc/rtc-ds1302.c b/drivers/rtc/rtc-ds1302.c
index fdbcdb289d60..d13954346286 100644
--- a/drivers/rtc/rtc-ds1302.c
+++ b/drivers/rtc/rtc-ds1302.c
@@ -224,7 +224,7 @@ static int __init ds1302_rtc_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	rtc = rtc_device_register("ds1302", &pdev->dev,
+	rtc = devm_rtc_device_register(&pdev->dev, "ds1302",
 					   &ds1302_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -234,11 +234,8 @@ static int __init ds1302_rtc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int ds1302_rtc_remove(struct platform_device *pdev)
+static int __exit ds1302_rtc_remove(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtc);
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
@@ -249,21 +246,10 @@ static struct platform_driver ds1302_platform_driver = {
 		.name	= DRV_NAME,
 		.owner	= THIS_MODULE,
 	},
-	.remove		= ds1302_rtc_remove,
+	.remove		= __exit_p(ds1302_rtc_remove),
 };
 
-static int __init ds1302_rtc_init(void)
-{
-	return platform_driver_probe(&ds1302_platform_driver, ds1302_rtc_probe);
-}
-
-static void __exit ds1302_rtc_exit(void)
-{
-	platform_driver_unregister(&ds1302_platform_driver);
-}
-
-module_init(ds1302_rtc_init);
-module_exit(ds1302_rtc_exit);
+module_platform_driver_probe(ds1302_platform_driver, ds1302_rtc_probe);
 
 MODULE_DESCRIPTION("Dallas DS1302 RTC driver");
 MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 970a236b147a..b859d3c67f11 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -4,6 +4,7 @@
  *  Copyright (C) 2005 James Chapman (ds1337 core)
  *  Copyright (C) 2006 David Brownell
  *  Copyright (C) 2009 Matthias Fuchs (rx8025 support)
+ *  Copyright (C) 2012 Bertrand Achard (nvram access fixes)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -196,7 +197,7 @@ static s32 ds1307_read_block_data_once(const struct i2c_client *client,
 static s32 ds1307_read_block_data(const struct i2c_client *client, u8 command,
 				  u8 length, u8 *values)
 {
-	u8 oldvalues[I2C_SMBUS_BLOCK_MAX];
+	u8 oldvalues[255];
 	s32 ret;
 	int tries = 0;
 
@@ -222,7 +223,7 @@ static s32 ds1307_read_block_data(const struct i2c_client *client, u8 command,
 static s32 ds1307_write_block_data(const struct i2c_client *client, u8 command,
 				   u8 length, const u8 *values)
 {
-	u8 currvalues[I2C_SMBUS_BLOCK_MAX];
+	u8 currvalues[255];
 	int tries = 0;
 
 	dev_dbg(&client->dev, "ds1307_write_block_data (length=%d)\n", length);
@@ -250,6 +251,57 @@ static s32 ds1307_write_block_data(const struct i2c_client *client, u8 command,
 
 /*----------------------------------------------------------------------*/
 
+/* These RTC devices are not designed to be connected to a SMbus adapter.
+   SMbus limits block operations length to 32 bytes, whereas it's not
+   limited on I2C buses. As a result, accesses may exceed 32 bytes;
+   in that case, split them into smaller blocks */
+
+static s32 ds1307_native_smbus_write_block_data(const struct i2c_client *client,
+				u8 command, u8 length, const u8 *values)
+{
+	u8 suboffset = 0;
+
+	if (length <= I2C_SMBUS_BLOCK_MAX)
+		return i2c_smbus_write_i2c_block_data(client,
+					command, length, values);
+
+	while (suboffset < length) {
+		s32 retval = i2c_smbus_write_i2c_block_data(client,
+				command + suboffset,
+				min(I2C_SMBUS_BLOCK_MAX, length - suboffset),
+				values + suboffset);
+		if (retval < 0)
+			return retval;
+
+		suboffset += I2C_SMBUS_BLOCK_MAX;
+	}
+	return length;
+}
+
+static s32 ds1307_native_smbus_read_block_data(const struct i2c_client *client,
+				u8 command, u8 length, u8 *values)
+{
+	u8 suboffset = 0;
+
+	if (length <= I2C_SMBUS_BLOCK_MAX)
+		return i2c_smbus_read_i2c_block_data(client,
+					command, length, values);
+
+	while (suboffset < length) {
+		s32 retval = i2c_smbus_read_i2c_block_data(client,
+				command + suboffset,
+				min(I2C_SMBUS_BLOCK_MAX, length - suboffset),
+				values + suboffset);
+		if (retval < 0)
+			return retval;
+
+		suboffset += I2C_SMBUS_BLOCK_MAX;
+	}
+	return length;
+}
+
+/*----------------------------------------------------------------------*/
+
 /*
  * The IRQ logic includes a "real" handler running in IRQ context just
  * long enough to schedule this workqueue entry.   We need a task context
@@ -646,8 +698,8 @@ static int ds1307_probe(struct i2c_client *client,
 
 	buf = ds1307->regs;
 	if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
-		ds1307->read_block_data = i2c_smbus_read_i2c_block_data;
-		ds1307->write_block_data = i2c_smbus_write_i2c_block_data;
+		ds1307->read_block_data = ds1307_native_smbus_read_block_data;
+		ds1307->write_block_data = ds1307_native_smbus_write_block_data;
 	} else {
 		ds1307->read_block_data = ds1307_read_block_data;
 		ds1307->write_block_data = ds1307_write_block_data;
@@ -661,7 +713,7 @@ static int ds1307_probe(struct i2c_client *client,
 		tmp = ds1307->read_block_data(ds1307->client,
 				DS1337_REG_CONTROL, 2, buf);
 		if (tmp != 2) {
-			pr_debug("read error %d\n", tmp);
+			dev_dbg(&client->dev, "read error %d\n", tmp);
 			err = -EIO;
 			goto exit_free;
 		}
@@ -700,7 +752,7 @@ static int ds1307_probe(struct i2c_client *client,
 		tmp = i2c_smbus_read_i2c_block_data(ds1307->client,
 				RX8025_REG_CTRL1 << 4 | 0x08, 2, buf);
 		if (tmp != 2) {
-			pr_debug("read error %d\n", tmp);
+			dev_dbg(&client->dev, "read error %d\n", tmp);
 			err = -EIO;
 			goto exit_free;
 		}
@@ -744,7 +796,7 @@ static int ds1307_probe(struct i2c_client *client,
 			tmp = i2c_smbus_read_i2c_block_data(ds1307->client,
 					RX8025_REG_CTRL1 << 4 | 0x08, 2, buf);
 			if (tmp != 2) {
-				pr_debug("read error %d\n", tmp);
+				dev_dbg(&client->dev, "read error %d\n", tmp);
 				err = -EIO;
 				goto exit_free;
 			}
@@ -772,7 +824,7 @@ read_rtc:
 	/* read RTC registers */
 	tmp = ds1307->read_block_data(ds1307->client, ds1307->offset, 8, buf);
 	if (tmp != 8) {
-		pr_debug("read error %d\n", tmp);
+		dev_dbg(&client->dev, "read error %d\n", tmp);
 		err = -EIO;
 		goto exit_free;
 	}
@@ -814,7 +866,7 @@ read_rtc:
 
 		tmp = i2c_smbus_read_byte_data(client, DS1340_REG_FLAG);
 		if (tmp < 0) {
-			pr_debug("read error %d\n", tmp);
+			dev_dbg(&client->dev, "read error %d\n", tmp);
 			err = -EIO;
 			goto exit_free;
 		}
diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index 6a3fcfe3b0e7..6ce8a997cf51 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -538,15 +538,14 @@ static int ds1511_rtc_probe(struct platform_device *pdev)
 		}
 	}
 
-	rtc = rtc_device_register(pdev->name, &pdev->dev, &ds1511_rtc_ops,
-		THIS_MODULE);
+	rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &ds1511_rtc_ops,
+					THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 	pdata->rtc = rtc;
 
 	ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr);
-	if (ret)
-		rtc_device_unregister(pdata->rtc);
+
 	return ret;
 }
 
@@ -555,7 +554,6 @@ static int ds1511_rtc_remove(struct platform_device *pdev)
 	struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
 	sysfs_remove_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr);
-	rtc_device_unregister(pdata->rtc);
 	if (pdata->irq > 0) {
 		/*
 		 * disable the alarm interrupt
diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c
index 25ce0621ade9..8c6c952e90b1 100644
--- a/drivers/rtc/rtc-ds1553.c
+++ b/drivers/rtc/rtc-ds1553.c
@@ -326,15 +326,14 @@ static int ds1553_rtc_probe(struct platform_device *pdev)
 		}
 	}
 
-	rtc = rtc_device_register(pdev->name, &pdev->dev,
+	rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				  &ds1553_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 	pdata->rtc = rtc;
 
 	ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr);
-	if (ret)
-		rtc_device_unregister(rtc);
+
 	return ret;
 }
 
@@ -343,7 +342,6 @@ static int ds1553_rtc_remove(struct platform_device *pdev)
 	struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
 	sysfs_remove_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr);
-	rtc_device_unregister(pdata->rtc);
 	if (pdata->irq > 0)
 		writeb(0, pdata->ioaddr + RTC_INTERRUPTS);
 	return 0;
diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c
index 45d65c0b3a85..3fc2a4738027 100644
--- a/drivers/rtc/rtc-ds1672.c
+++ b/drivers/rtc/rtc-ds1672.c
@@ -155,11 +155,6 @@ static const struct rtc_class_ops ds1672_rtc_ops = {
 
 static int ds1672_remove(struct i2c_client *client)
 {
-	struct rtc_device *rtc = i2c_get_clientdata(client);
-
-	if (rtc)
-		rtc_device_unregister(rtc);
-
 	return 0;
 }
 
@@ -177,7 +172,7 @@ static int ds1672_probe(struct i2c_client *client,
 
 	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
-	rtc = rtc_device_register(ds1672_driver.driver.name, &client->dev,
+	rtc = devm_rtc_device_register(&client->dev, ds1672_driver.driver.name,
 				  &ds1672_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc))
@@ -202,7 +197,6 @@ static int ds1672_probe(struct i2c_client *client,
 	return 0;
 
  exit_devreg:
-	rtc_device_unregister(rtc);
 	return err;
 }
 
diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c
index 609c870e2cc5..eccdc62ae1c0 100644
--- a/drivers/rtc/rtc-ds1742.c
+++ b/drivers/rtc/rtc-ds1742.c
@@ -208,17 +208,14 @@ static int ds1742_rtc_probe(struct platform_device *pdev)
 
 	pdata->last_jiffies = jiffies;
 	platform_set_drvdata(pdev, pdata);
-	rtc = rtc_device_register(pdev->name, &pdev->dev,
+	rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				  &ds1742_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 	pdata->rtc = rtc;
 
 	ret = sysfs_create_bin_file(&pdev->dev.kobj, &pdata->nvram_attr);
-	if (ret) {
-		dev_err(&pdev->dev, "creating nvram file in sysfs failed\n");
-		rtc_device_unregister(rtc);
-	}
+
 	return ret;
 }
 
@@ -227,7 +224,6 @@ static int ds1742_rtc_remove(struct platform_device *pdev)
 	struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
 	sysfs_remove_bin_file(&pdev->dev.kobj, &pdata->nvram_attr);
-	rtc_device_unregister(pdata->rtc);
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-ds3234.c b/drivers/rtc/rtc-ds3234.c
index 7a4495ef1c39..a66efd49430e 100644
--- a/drivers/rtc/rtc-ds3234.c
+++ b/drivers/rtc/rtc-ds3234.c
@@ -146,8 +146,8 @@ static int ds3234_probe(struct spi_device *spi)
 	ds3234_get_reg(&spi->dev, DS3234_REG_CONT_STAT, &tmp);
 	dev_info(&spi->dev, "Ctrl/Stat Reg: 0x%02x\n", tmp);
 
-	rtc = rtc_device_register("ds3234",
-				&spi->dev, &ds3234_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&spi->dev, "ds3234",
+				&ds3234_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -158,9 +158,6 @@ static int ds3234_probe(struct spi_device *spi)
 
 static int ds3234_remove(struct spi_device *spi)
 {
-	struct rtc_device *rtc = spi_get_drvdata(spi);
-
-	rtc_device_unregister(rtc);
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 1a0c37c9152b..b3c8c0b1709d 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -191,7 +191,7 @@ static int __init efi_rtc_probe(struct platform_device *dev)
 {
 	struct rtc_device *rtc;
 
-	rtc = rtc_device_register("rtc-efi", &dev->dev, &efi_rtc_ops,
+	rtc = devm_rtc_device_register(&dev->dev, "rtc-efi", &efi_rtc_ops,
 					THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -203,10 +203,6 @@ static int __init efi_rtc_probe(struct platform_device *dev)
 
 static int __exit efi_rtc_remove(struct platform_device *dev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(dev);
-
-	rtc_device_unregister(rtc);
-
 	return 0;
 }
 
@@ -218,18 +214,7 @@ static struct platform_driver efi_rtc_driver = {
 	.remove = __exit_p(efi_rtc_remove),
 };
 
-static int __init efi_rtc_init(void)
-{
-	return platform_driver_probe(&efi_rtc_driver, efi_rtc_probe);
-}
-
-static void __exit efi_rtc_exit(void)
-{
-	platform_driver_unregister(&efi_rtc_driver);
-}
-
-module_init(efi_rtc_init);
-module_exit(efi_rtc_exit);
+module_platform_driver_probe(efi_rtc_driver, efi_rtc_probe);
 
 MODULE_AUTHOR("dann frazier <dannf@hp.com>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-em3027.c b/drivers/rtc/rtc-em3027.c
index f6c24ce35d36..3f9eb57d0486 100644
--- a/drivers/rtc/rtc-em3027.c
+++ b/drivers/rtc/rtc-em3027.c
@@ -121,7 +121,7 @@ static int em3027_probe(struct i2c_client *client,
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
 		return -ENODEV;
 
-	rtc = rtc_device_register(em3027_driver.driver.name, &client->dev,
+	rtc = devm_rtc_device_register(&client->dev, em3027_driver.driver.name,
 				  &em3027_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -133,11 +133,6 @@ static int em3027_probe(struct i2c_client *client,
 
 static int em3027_remove(struct i2c_client *client)
 {
-	struct rtc_device *rtc = i2c_get_clientdata(client);
-
-	if (rtc)
-		rtc_device_unregister(rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-ep93xx.c b/drivers/rtc/rtc-ep93xx.c
index 1a4e5e4a70cd..5807b77c444a 100644
--- a/drivers/rtc/rtc-ep93xx.c
+++ b/drivers/rtc/rtc-ep93xx.c
@@ -153,8 +153,8 @@ static int ep93xx_rtc_probe(struct platform_device *pdev)
 	pdev->dev.platform_data = ep93xx_rtc;
 	platform_set_drvdata(pdev, ep93xx_rtc);
 
-	ep93xx_rtc->rtc = rtc_device_register(pdev->name,
-				&pdev->dev, &ep93xx_rtc_ops, THIS_MODULE);
+	ep93xx_rtc->rtc = devm_rtc_device_register(&pdev->dev,
+				pdev->name, &ep93xx_rtc_ops, THIS_MODULE);
 	if (IS_ERR(ep93xx_rtc->rtc)) {
 		err = PTR_ERR(ep93xx_rtc->rtc);
 		goto exit;
@@ -162,12 +162,10 @@ static int ep93xx_rtc_probe(struct platform_device *pdev)
 
 	err = sysfs_create_group(&pdev->dev.kobj, &ep93xx_rtc_sysfs_files);
 	if (err)
-		goto fail;
+		goto exit;
 
 	return 0;
 
-fail:
-	rtc_device_unregister(ep93xx_rtc->rtc);
 exit:
 	platform_set_drvdata(pdev, NULL);
 	pdev->dev.platform_data = NULL;
@@ -176,11 +174,8 @@ exit:
 
 static int ep93xx_rtc_remove(struct platform_device *pdev)
 {
-	struct ep93xx_rtc *ep93xx_rtc = platform_get_drvdata(pdev);
-
 	sysfs_remove_group(&pdev->dev.kobj, &ep93xx_rtc_sysfs_files);
 	platform_set_drvdata(pdev, NULL);
-	rtc_device_unregister(ep93xx_rtc->rtc);
 	pdev->dev.platform_data = NULL;
 
 	return 0;
diff --git a/drivers/rtc/rtc-fm3130.c b/drivers/rtc/rtc-fm3130.c
index bff3cdc5140e..4d4ad3fcb5e9 100644
--- a/drivers/rtc/rtc-fm3130.c
+++ b/drivers/rtc/rtc-fm3130.c
@@ -395,7 +395,7 @@ static int fm3130_probe(struct i2c_client *client,
 
 	tmp = i2c_transfer(adapter, fm3130->msg, 4);
 	if (tmp != 4) {
-		pr_debug("read error %d\n", tmp);
+		dev_dbg(&client->dev, "read error %d\n", tmp);
 		err = -EIO;
 		goto exit_free;
 	}
diff --git a/drivers/rtc/rtc-generic.c b/drivers/rtc/rtc-generic.c
index 98322004ad2e..06279ce6bff2 100644
--- a/drivers/rtc/rtc-generic.c
+++ b/drivers/rtc/rtc-generic.c
@@ -38,8 +38,8 @@ static int __init generic_rtc_probe(struct platform_device *dev)
 {
 	struct rtc_device *rtc;
 
-	rtc = rtc_device_register("rtc-generic", &dev->dev, &generic_rtc_ops,
-				  THIS_MODULE);
+	rtc = devm_rtc_device_register(&dev->dev, "rtc-generic",
+					&generic_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -50,10 +50,6 @@ static int __init generic_rtc_probe(struct platform_device *dev)
 
 static int __exit generic_rtc_remove(struct platform_device *dev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(dev);
-
-	rtc_device_unregister(rtc);
-
 	return 0;
 }
 
@@ -65,18 +61,7 @@ static struct platform_driver generic_rtc_driver = {
 	.remove = __exit_p(generic_rtc_remove),
 };
 
-static int __init generic_rtc_init(void)
-{
-	return platform_driver_probe(&generic_rtc_driver, generic_rtc_probe);
-}
-
-static void __exit generic_rtc_fini(void)
-{
-	platform_driver_unregister(&generic_rtc_driver);
-}
-
-module_init(generic_rtc_init);
-module_exit(generic_rtc_fini);
+module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe);
 
 MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c
index 31c5728ef629..63024505dddc 100644
--- a/drivers/rtc/rtc-hid-sensor-time.c
+++ b/drivers/rtc/rtc-hid-sensor-time.c
@@ -255,8 +255,9 @@ static int hid_time_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	time_state->rtc = rtc_device_register("hid-sensor-time",
-				&pdev->dev, &hid_time_rtc_ops, THIS_MODULE);
+	time_state->rtc = devm_rtc_device_register(&pdev->dev,
+					"hid-sensor-time", &hid_time_rtc_ops,
+					THIS_MODULE);
 
 	if (IS_ERR(time_state->rtc)) {
 		dev_err(&pdev->dev, "rtc device register failed!\n");
@@ -269,9 +270,7 @@ static int hid_time_probe(struct platform_device *pdev)
 static int hid_time_remove(struct platform_device *pdev)
 {
 	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
-	struct hid_time_state *time_state = platform_get_drvdata(pdev);
 
-	rtc_device_unregister(time_state->rtc);
 	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME);
 
 	return 0;
diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c
index 82aad695979e..d3a8c8e255de 100644
--- a/drivers/rtc/rtc-imxdi.c
+++ b/drivers/rtc/rtc-imxdi.c
@@ -369,7 +369,7 @@ static void dryice_work(struct work_struct *work)
 /*
  * probe for dryice rtc device
  */
-static int dryice_rtc_probe(struct platform_device *pdev)
+static int __init dryice_rtc_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct imxdi_dev *imxdi;
@@ -464,7 +464,7 @@ static int dryice_rtc_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, imxdi);
-	imxdi->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	imxdi->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				  &dryice_rtc_ops, THIS_MODULE);
 	if (IS_ERR(imxdi->rtc)) {
 		rc = PTR_ERR(imxdi->rtc);
@@ -479,7 +479,7 @@ err:
 	return rc;
 }
 
-static int dryice_rtc_remove(struct platform_device *pdev)
+static int __exit dryice_rtc_remove(struct platform_device *pdev)
 {
 	struct imxdi_dev *imxdi = platform_get_drvdata(pdev);
 
@@ -488,8 +488,6 @@ static int dryice_rtc_remove(struct platform_device *pdev)
 	/* mask all interrupts */
 	__raw_writel(0, imxdi->ioaddr + DIER);
 
-	rtc_device_unregister(imxdi->rtc);
-
 	clk_disable_unprepare(imxdi->clk);
 
 	return 0;
@@ -510,21 +508,10 @@ static struct platform_driver dryice_rtc_driver = {
 		   .owner = THIS_MODULE,
 		   .of_match_table = of_match_ptr(dryice_dt_ids),
 		   },
-	.remove = dryice_rtc_remove,
+	.remove = __exit_p(dryice_rtc_remove),
 };
 
-static int __init dryice_rtc_init(void)
-{
-	return platform_driver_probe(&dryice_rtc_driver, dryice_rtc_probe);
-}
-
-static void __exit dryice_rtc_exit(void)
-{
-	platform_driver_unregister(&dryice_rtc_driver);
-}
-
-module_init(dryice_rtc_init);
-module_exit(dryice_rtc_exit);
+module_platform_driver_probe(dryice_rtc_driver, dryice_rtc_probe);
 
 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
diff --git a/drivers/rtc/rtc-lp8788.c b/drivers/rtc/rtc-lp8788.c
index 9a4631218f41..9853ac15b296 100644
--- a/drivers/rtc/rtc-lp8788.c
+++ b/drivers/rtc/rtc-lp8788.c
@@ -299,7 +299,7 @@ static int lp8788_rtc_probe(struct platform_device *pdev)
 
 	device_init_wakeup(dev, 1);
 
-	rtc->rdev = rtc_device_register("lp8788_rtc", dev,
+	rtc->rdev = devm_rtc_device_register(dev, "lp8788_rtc",
 					&lp8788_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc->rdev)) {
 		dev_err(dev, "can not register rtc device\n");
@@ -314,9 +314,6 @@ static int lp8788_rtc_probe(struct platform_device *pdev)
 
 static int lp8788_rtc_remove(struct platform_device *pdev)
 {
-	struct lp8788_rtc *rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtc->rdev);
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
diff --git a/drivers/rtc/rtc-lpc32xx.c b/drivers/rtc/rtc-lpc32xx.c
index 40a598332bac..787550d756e9 100644
--- a/drivers/rtc/rtc-lpc32xx.c
+++ b/drivers/rtc/rtc-lpc32xx.c
@@ -273,8 +273,8 @@ static int lpc32xx_rtc_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, rtc);
 
-	rtc->rtc = rtc_device_register(RTC_NAME, &pdev->dev, &lpc32xx_rtc_ops,
-		THIS_MODULE);
+	rtc->rtc = devm_rtc_device_register(&pdev->dev, RTC_NAME,
+					&lpc32xx_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc->rtc)) {
 		dev_err(&pdev->dev, "Can't get RTC\n");
 		platform_set_drvdata(pdev, NULL);
@@ -307,7 +307,6 @@ static int lpc32xx_rtc_remove(struct platform_device *pdev)
 		device_init_wakeup(&pdev->dev, 0);
 
 	platform_set_drvdata(pdev, NULL);
-	rtc_device_unregister(rtc->rtc);
 
 	return 0;
 }
diff --git a/drivers/rtc/rtc-ls1x.c b/drivers/rtc/rtc-ls1x.c
index f59b6349551a..db82f91f4562 100644
--- a/drivers/rtc/rtc-ls1x.c
+++ b/drivers/rtc/rtc-ls1x.c
@@ -172,7 +172,7 @@ static int ls1x_rtc_probe(struct platform_device *pdev)
 	while (readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS)
 		usleep_range(1000, 3000);
 
-	rtcdev = rtc_device_register("ls1x-rtc", &pdev->dev,
+	rtcdev = devm_rtc_device_register(&pdev->dev, "ls1x-rtc",
 					&ls1x_rtc_ops , THIS_MODULE);
 	if (IS_ERR(rtcdev)) {
 		ret = PTR_ERR(rtcdev);
@@ -187,9 +187,6 @@ err:
 
 static int ls1x_rtc_remove(struct platform_device *pdev)
 {
-	struct rtc_device *rtcdev = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtcdev);
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
diff --git a/drivers/rtc/rtc-m41t93.c b/drivers/rtc/rtc-m41t93.c
index 49169680786e..cfc21a1608ab 100644
--- a/drivers/rtc/rtc-m41t93.c
+++ b/drivers/rtc/rtc-m41t93.c
@@ -184,8 +184,8 @@ static int m41t93_probe(struct spi_device *spi)
 		return -ENODEV;
 	}
 
-	rtc = rtc_device_register(m41t93_driver.driver.name,
-		&spi->dev, &m41t93_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&spi->dev, m41t93_driver.driver.name,
+					&m41t93_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -197,11 +197,6 @@ static int m41t93_probe(struct spi_device *spi)
 
 static int m41t93_remove(struct spi_device *spi)
 {
-	struct rtc_device *rtc = spi_get_drvdata(spi);
-
-	if (rtc)
-		rtc_device_unregister(rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-m41t94.c b/drivers/rtc/rtc-m41t94.c
index 89266c6764bc..cf655a91e385 100644
--- a/drivers/rtc/rtc-m41t94.c
+++ b/drivers/rtc/rtc-m41t94.c
@@ -124,8 +124,8 @@ static int m41t94_probe(struct spi_device *spi)
 		return res;
 	}
 
-	rtc = rtc_device_register(m41t94_driver.driver.name,
-		&spi->dev, &m41t94_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&spi->dev, m41t94_driver.driver.name,
+					&m41t94_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -136,11 +136,6 @@ static int m41t94_probe(struct spi_device *spi)
 
 static int m41t94_remove(struct spi_device *spi)
 {
-	struct rtc_device *rtc = spi_get_drvdata(spi);
-
-	if (rtc)
-		rtc_device_unregister(rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c
index 2ffbcacd2439..33a91c484533 100644
--- a/drivers/rtc/rtc-m48t86.c
+++ b/drivers/rtc/rtc-m48t86.c
@@ -148,8 +148,10 @@ static int m48t86_rtc_probe(struct platform_device *dev)
 {
 	unsigned char reg;
 	struct m48t86_ops *ops = dev->dev.platform_data;
-	struct rtc_device *rtc = rtc_device_register("m48t86",
-				&dev->dev, &m48t86_rtc_ops, THIS_MODULE);
+	struct rtc_device *rtc;
+
+	rtc = devm_rtc_device_register(&dev->dev, "m48t86",
+				&m48t86_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -166,11 +168,6 @@ static int m48t86_rtc_probe(struct platform_device *dev)
 
 static int m48t86_rtc_remove(struct platform_device *dev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(dev);
-
- 	if (rtc)
-		rtc_device_unregister(rtc);
-
 	platform_set_drvdata(dev, NULL);
 
 	return 0;
diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c
index a00e33204b91..8669d6d09a00 100644
--- a/drivers/rtc/rtc-max6900.c
+++ b/drivers/rtc/rtc-max6900.c
@@ -214,11 +214,6 @@ static int max6900_rtc_set_time(struct device *dev, struct rtc_time *tm)
 
 static int max6900_remove(struct i2c_client *client)
 {
-	struct rtc_device *rtc = i2c_get_clientdata(client);
-
-	if (rtc)
-		rtc_device_unregister(rtc);
-
 	return 0;
 }
 
@@ -237,8 +232,8 @@ max6900_probe(struct i2c_client *client, const struct i2c_device_id *id)
 
 	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
-	rtc = rtc_device_register(max6900_driver.driver.name,
-				  &client->dev, &max6900_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&client->dev, max6900_driver.driver.name,
+					&max6900_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
diff --git a/drivers/rtc/rtc-max6902.c b/drivers/rtc/rtc-max6902.c
index 7d0bf698b79e..7e4491b1f90b 100644
--- a/drivers/rtc/rtc-max6902.c
+++ b/drivers/rtc/rtc-max6902.c
@@ -134,8 +134,8 @@ static int max6902_probe(struct spi_device *spi)
 	if (res != 0)
 		return res;
 
-	rtc = rtc_device_register("max6902",
-				&spi->dev, &max6902_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&spi->dev, "max6902",
+				&max6902_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -145,9 +145,6 @@ static int max6902_probe(struct spi_device *spi)
 
 static int max6902_remove(struct spi_device *spi)
 {
-	struct rtc_device *rtc = dev_get_drvdata(&spi->dev);
-
-	rtc_device_unregister(rtc);
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 6b1337f9baf4..5a12b32f77ec 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -24,7 +24,7 @@
 
 /* RTC Control Register */
 #define BCD_EN_SHIFT			0
-#define BCD_EN_MASK				(1 << BCD_EN_SHIFT)
+#define BCD_EN_MASK			(1 << BCD_EN_SHIFT)
 #define MODEL24_SHIFT			1
 #define MODEL24_MASK			(1 << MODEL24_SHIFT)
 /* RTC Update Register1 */
@@ -33,12 +33,12 @@
 #define RTC_RBUDR_SHIFT			4
 #define RTC_RBUDR_MASK			(1 << RTC_RBUDR_SHIFT)
 /* WTSR and SMPL Register */
-#define WTSRT_SHIFT				0
-#define SMPLT_SHIFT				2
+#define WTSRT_SHIFT			0
+#define SMPLT_SHIFT			2
 #define WTSR_EN_SHIFT			6
 #define SMPL_EN_SHIFT			7
-#define WTSRT_MASK				(3 << WTSRT_SHIFT)
-#define SMPLT_MASK				(3 << SMPLT_SHIFT)
+#define WTSRT_MASK			(3 << WTSRT_SHIFT)
+#define SMPLT_MASK			(3 << SMPLT_SHIFT)
 #define WTSR_EN_MASK			(1 << WTSR_EN_SHIFT)
 #define SMPL_EN_MASK			(1 << SMPL_EN_SHIFT)
 /* RTC Hour register */
@@ -466,7 +466,7 @@ static void max77686_rtc_enable_smpl(struct max77686_rtc_info *info, bool enable
 
 	val = 0;
 	regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val);
-	pr_info("%s: WTSR_SMPL(0x%02x)\n", __func__, val);
+	dev_info(info->dev, "%s: WTSR_SMPL(0x%02x)\n", __func__, val);
 }
 #endif /* MAX77686_RTC_WTSR_SMPL */
 
@@ -505,7 +505,8 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 
 	dev_info(&pdev->dev, "%s\n", __func__);
 
-	info = kzalloc(sizeof(struct max77686_rtc_info), GFP_KERNEL);
+	info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info),
+				GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
 
@@ -519,7 +520,6 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 		ret = PTR_ERR(info->max77686->rtc_regmap);
 		dev_err(info->max77686->dev, "Failed to allocate register map: %d\n",
 				ret);
-		kfree(info);
 		return ret;
 	}
 	platform_set_drvdata(pdev, info);
@@ -538,8 +538,8 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	info->rtc_dev = rtc_device_register("max77686-rtc", &pdev->dev,
-			&max77686_rtc_ops, THIS_MODULE);
+	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc",
+					&max77686_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(info->rtc_dev)) {
 		dev_info(&pdev->dev, "%s: fail\n", __func__);
@@ -555,32 +555,20 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 		goto err_rtc;
 	info->virq = virq;
 
-	ret = request_threaded_irq(virq, NULL, max77686_rtc_alarm_irq, 0,
-			"rtc-alarm0", info);
+	ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
+				max77686_rtc_alarm_irq, 0, "rtc-alarm0", info);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
 			info->virq, ret);
 		goto err_rtc;
 	}
 
-	goto out;
 err_rtc:
-	kfree(info);
-	return ret;
-out:
 	return ret;
 }
 
 static int max77686_rtc_remove(struct platform_device *pdev)
 {
-	struct max77686_rtc_info *info = platform_get_drvdata(pdev);
-
-	if (info) {
-		free_irq(info->virq, info);
-		rtc_device_unregister(info->rtc_dev);
-		kfree(info);
-	}
-
 	return 0;
 }
 
@@ -594,11 +582,14 @@ static void max77686_rtc_shutdown(struct platform_device *pdev)
 	for (i = 0; i < 3; i++) {
 		max77686_rtc_enable_wtsr(info, false);
 		regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val);
-		pr_info("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val);
-		if (val & WTSR_EN_MASK)
-			pr_emerg("%s: fail to disable WTSR\n", __func__);
-		else {
-			pr_info("%s: success to disable WTSR\n", __func__);
+		dev_info(info->dev, "%s: WTSR_SMPL reg(0x%02x)\n", __func__,
+				val);
+		if (val & WTSR_EN_MASK) {
+			dev_emerg(info->dev, "%s: fail to disable WTSR\n",
+					__func__);
+		} else {
+			dev_info(info->dev, "%s: success to disable WTSR\n",
+					__func__);
 			break;
 		}
 	}
@@ -624,18 +615,8 @@ static struct platform_driver max77686_rtc_driver = {
 	.id_table	= rtc_id,
 };
 
-static int __init max77686_rtc_init(void)
-{
-	return platform_driver_register(&max77686_rtc_driver);
-}
-module_init(max77686_rtc_init);
-
-static void __exit max77686_rtc_exit(void)
-{
-	platform_driver_unregister(&max77686_rtc_driver);
-}
-module_exit(max77686_rtc_exit);
+module_platform_driver(max77686_rtc_driver);
 
 MODULE_DESCRIPTION("Maxim MAX77686 RTC driver");
-MODULE_AUTHOR("<woong.byun@samsung.com>");
+MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-max8907.c b/drivers/rtc/rtc-max8907.c
index 31ca8faf9f05..9d62cdb83d11 100644
--- a/drivers/rtc/rtc-max8907.c
+++ b/drivers/rtc/rtc-max8907.c
@@ -190,7 +190,7 @@ static int max8907_rtc_probe(struct platform_device *pdev)
 	rtc->max8907 = max8907;
 	rtc->regmap = max8907->regmap_rtc;
 
-	rtc->rtc_dev = rtc_device_register("max8907-rtc", &pdev->dev,
+	rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8907-rtc",
 					&max8907_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc->rtc_dev)) {
 		ret = PTR_ERR(rtc->rtc_dev);
@@ -217,16 +217,11 @@ static int max8907_rtc_probe(struct platform_device *pdev)
 	return 0;
 
 err_unregister:
-	rtc_device_unregister(rtc->rtc_dev);
 	return ret;
 }
 
 static int max8907_rtc_remove(struct platform_device *pdev)
 {
-	struct max8907_rtc *rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtc->rtc_dev);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-max8997.c b/drivers/rtc/rtc-max8997.c
index 00e505b6bee3..d12acc49c822 100644
--- a/drivers/rtc/rtc-max8997.c
+++ b/drivers/rtc/rtc-max8997.c
@@ -479,8 +479,8 @@ static int max8997_rtc_probe(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	info->rtc_dev = rtc_device_register("max8997-rtc", &pdev->dev,
-			&max8997_rtc_ops, THIS_MODULE);
+	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8997-rtc",
+					&max8997_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(info->rtc_dev)) {
 		ret = PTR_ERR(info->rtc_dev);
@@ -507,17 +507,11 @@ static int max8997_rtc_probe(struct platform_device *pdev)
 	return ret;
 
 err_out:
-	rtc_device_unregister(info->rtc_dev);
 	return ret;
 }
 
 static int max8997_rtc_remove(struct platform_device *pdev)
 {
-	struct max8997_rtc_info *info = platform_get_drvdata(pdev);
-
-	if (info)
-		rtc_device_unregister(info->rtc_dev);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-mc13xxx.c b/drivers/rtc/rtc-mc13xxx.c
index 2643d8874925..5391b154b43c 100644
--- a/drivers/rtc/rtc-mc13xxx.c
+++ b/drivers/rtc/rtc-mc13xxx.c
@@ -420,17 +420,7 @@ static struct platform_driver mc13xxx_rtc_driver = {
 	},
 };
 
-static int __init mc13xxx_rtc_init(void)
-{
-	return platform_driver_probe(&mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
-}
-module_init(mc13xxx_rtc_init);
-
-static void __exit mc13xxx_rtc_exit(void)
-{
-	platform_driver_unregister(&mc13xxx_rtc_driver);
-}
-module_exit(mc13xxx_rtc_exit);
+module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
 
 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
diff --git a/drivers/rtc/rtc-msm6242.c b/drivers/rtc/rtc-msm6242.c
index fcb113c11122..3ac1e8eca89d 100644
--- a/drivers/rtc/rtc-msm6242.c
+++ b/drivers/rtc/rtc-msm6242.c
@@ -252,18 +252,7 @@ static struct platform_driver msm6242_rtc_driver = {
 	.remove	= __exit_p(msm6242_rtc_remove),
 };
 
-static int __init msm6242_rtc_init(void)
-{
-	return platform_driver_probe(&msm6242_rtc_driver, msm6242_rtc_probe);
-}
-
-static void __exit msm6242_rtc_fini(void)
-{
-	platform_driver_unregister(&msm6242_rtc_driver);
-}
-
-module_init(msm6242_rtc_init);
-module_exit(msm6242_rtc_fini);
+module_platform_driver_probe(msm6242_rtc_driver, msm6242_rtc_probe);
 
 MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index 8f87fec27ce7..baab802f2153 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -217,7 +217,7 @@ static const struct rtc_class_ops mv_rtc_alarm_ops = {
 	.alarm_irq_enable = mv_rtc_alarm_irq_enable,
 };
 
-static int mv_rtc_probe(struct platform_device *pdev)
+static int __init mv_rtc_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct rtc_plat_data *pdata;
@@ -272,12 +272,13 @@ static int mv_rtc_probe(struct platform_device *pdev)
 
 	if (pdata->irq >= 0) {
 		device_init_wakeup(&pdev->dev, 1);
-		pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
+		pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 						 &mv_rtc_alarm_ops,
 						 THIS_MODULE);
-	} else
-		pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	} else {
+		pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 						 &mv_rtc_ops, THIS_MODULE);
+	}
 	if (IS_ERR(pdata->rtc)) {
 		ret = PTR_ERR(pdata->rtc);
 		goto out;
@@ -308,7 +309,6 @@ static int __exit mv_rtc_remove(struct platform_device *pdev)
 	if (pdata->irq >= 0)
 		device_init_wakeup(&pdev->dev, 0);
 
-	rtc_device_unregister(pdata->rtc);
 	if (!IS_ERR(pdata->clk))
 		clk_disable_unprepare(pdata->clk);
 
@@ -331,18 +331,7 @@ static struct platform_driver mv_rtc_driver = {
 	},
 };
 
-static __init int mv_init(void)
-{
-	return platform_driver_probe(&mv_rtc_driver, mv_rtc_probe);
-}
-
-static __exit void mv_exit(void)
-{
-	platform_driver_unregister(&mv_rtc_driver);
-}
-
-module_init(mv_init);
-module_exit(mv_exit);
+module_platform_driver_probe(mv_rtc_driver, mv_rtc_probe);
 
 MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>");
 MODULE_DESCRIPTION("Marvell RTC driver");
diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index 1c3ef7289565..9a3895bc4f4d 100644
--- a/drivers/rtc/rtc-mxc.c
+++ b/drivers/rtc/rtc-mxc.c
@@ -439,7 +439,7 @@ static int mxc_rtc_probe(struct platform_device *pdev)
 	if (pdata->irq >=0)
 		device_init_wakeup(&pdev->dev, 1);
 
-	rtc = rtc_device_register(pdev->name, &pdev->dev, &mxc_rtc_ops,
+	rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &mxc_rtc_ops,
 				  THIS_MODULE);
 	if (IS_ERR(rtc)) {
 		ret = PTR_ERR(rtc);
@@ -464,15 +464,13 @@ static int mxc_rtc_remove(struct platform_device *pdev)
 {
 	struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
-	rtc_device_unregister(pdata->rtc);
-
 	clk_disable_unprepare(pdata->clk);
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int mxc_rtc_suspend(struct device *dev)
 {
 	struct rtc_plat_data *pdata = dev_get_drvdata(dev);
@@ -492,19 +490,14 @@ static int mxc_rtc_resume(struct device *dev)
 
 	return 0;
 }
-
-static struct dev_pm_ops mxc_rtc_pm_ops = {
-	.suspend	= mxc_rtc_suspend,
-	.resume		= mxc_rtc_resume,
-};
 #endif
 
+static SIMPLE_DEV_PM_OPS(mxc_rtc_pm_ops, mxc_rtc_suspend, mxc_rtc_resume);
+
 static struct platform_driver mxc_rtc_driver = {
 	.driver = {
 		   .name	= "mxc_rtc",
-#ifdef CONFIG_PM
 		   .pm		= &mxc_rtc_pm_ops,
-#endif
 		   .owner	= THIS_MODULE,
 	},
 	.id_table = imx_rtc_devtype,
diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c
index a63680850fef..4d9525cc1cf4 100644
--- a/drivers/rtc/rtc-nuc900.c
+++ b/drivers/rtc/rtc-nuc900.c
@@ -222,7 +222,7 @@ static struct rtc_class_ops nuc900_rtc_ops = {
 	.alarm_irq_enable = nuc900_alarm_irq_enable,
 };
 
-static int nuc900_rtc_probe(struct platform_device *pdev)
+static int __init nuc900_rtc_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct nuc900_rtc *nuc900_rtc;
@@ -284,7 +284,7 @@ fail1:	kfree(nuc900_rtc);
 	return err;
 }
 
-static int nuc900_rtc_remove(struct platform_device *pdev)
+static int __exit nuc900_rtc_remove(struct platform_device *pdev)
 {
 	struct nuc900_rtc *nuc900_rtc = platform_get_drvdata(pdev);
 	struct resource *res;
@@ -304,25 +304,14 @@ static int nuc900_rtc_remove(struct platform_device *pdev)
 }
 
 static struct platform_driver nuc900_rtc_driver = {
-	.remove		= nuc900_rtc_remove,
+	.remove		= __exit_p(nuc900_rtc_remove),
 	.driver		= {
 		.name	= "nuc900-rtc",
 		.owner	= THIS_MODULE,
 	},
 };
 
-static int __init nuc900_rtc_init(void)
-{
-	return platform_driver_probe(&nuc900_rtc_driver, nuc900_rtc_probe);
-}
-
-static void __exit nuc900_rtc_exit(void)
-{
-	platform_driver_unregister(&nuc900_rtc_driver);
-}
-
-module_init(nuc900_rtc_init);
-module_exit(nuc900_rtc_exit);
+module_platform_driver_probe(nuc900_rtc_driver, nuc900_rtc_probe);
 
 MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
 MODULE_DESCRIPTION("nuc910/nuc920 RTC driver");
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 600971407aac..172cc5ca7489 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -550,17 +550,7 @@ static struct platform_driver omap_rtc_driver = {
 	.id_table	= omap_rtc_devtype,
 };
 
-static int __init rtc_init(void)
-{
-	return platform_driver_probe(&omap_rtc_driver, omap_rtc_probe);
-}
-module_init(rtc_init);
-
-static void __exit rtc_exit(void)
-{
-	platform_driver_unregister(&omap_rtc_driver);
-}
-module_exit(rtc_exit);
+module_platform_driver_probe(omap_rtc_driver, omap_rtc_probe);
 
 MODULE_AUTHOR("George G. Davis (and others)");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-palmas.c b/drivers/rtc/rtc-palmas.c
index 59c42986254e..bbc3b9efdeb2 100644
--- a/drivers/rtc/rtc-palmas.c
+++ b/drivers/rtc/rtc-palmas.c
@@ -264,7 +264,7 @@ static int palmas_rtc_probe(struct platform_device *pdev)
 
 	palmas_rtc->irq = platform_get_irq(pdev, 0);
 
-	palmas_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	palmas_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				&palmas_rtc_ops, THIS_MODULE);
 	if (IS_ERR(palmas_rtc->rtc)) {
 		ret = PTR_ERR(palmas_rtc->rtc);
@@ -272,14 +272,13 @@ static int palmas_rtc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = request_threaded_irq(palmas_rtc->irq, NULL,
+	ret = devm_request_threaded_irq(&pdev->dev, palmas_rtc->irq, NULL,
 			palmas_rtc_interrupt,
 			IRQF_TRIGGER_LOW | IRQF_ONESHOT |
 			IRQF_EARLY_RESUME,
 			dev_name(&pdev->dev), palmas_rtc);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "IRQ request failed, err = %d\n", ret);
-		rtc_device_unregister(palmas_rtc->rtc);
 		return ret;
 	}
 
@@ -289,11 +288,7 @@ static int palmas_rtc_probe(struct platform_device *pdev)
 
 static int palmas_rtc_remove(struct platform_device *pdev)
 {
-	struct palmas_rtc *palmas_rtc = platform_get_drvdata(pdev);
-
 	palmas_rtc_alarm_irq_enable(&pdev->dev, 0);
-	free_irq(palmas_rtc->irq, palmas_rtc);
-	rtc_device_unregister(palmas_rtc->rtc);
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-pcap.c b/drivers/rtc/rtc-pcap.c
index e0019cd0bf71..ce0982490e8c 100644
--- a/drivers/rtc/rtc-pcap.c
+++ b/drivers/rtc/rtc-pcap.c
@@ -139,7 +139,7 @@ static const struct rtc_class_ops pcap_rtc_ops = {
 	.alarm_irq_enable = pcap_rtc_alarm_irq_enable,
 };
 
-static int pcap_rtc_probe(struct platform_device *pdev)
+static int __init pcap_rtc_probe(struct platform_device *pdev)
 {
 	struct pcap_rtc *pcap_rtc;
 	int timer_irq, alarm_irq;
@@ -183,7 +183,7 @@ fail_rtc:
 	return err;
 }
 
-static int pcap_rtc_remove(struct platform_device *pdev)
+static int __exit pcap_rtc_remove(struct platform_device *pdev)
 {
 	struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
 
@@ -196,25 +196,14 @@ static int pcap_rtc_remove(struct platform_device *pdev)
 }
 
 static struct platform_driver pcap_rtc_driver = {
-	.remove = pcap_rtc_remove,
+	.remove = __exit_p(pcap_rtc_remove),
 	.driver = {
 		.name  = "pcap-rtc",
 		.owner = THIS_MODULE,
 	},
 };
 
-static int __init rtc_pcap_init(void)
-{
-	return platform_driver_probe(&pcap_rtc_driver, pcap_rtc_probe);
-}
-
-static void __exit rtc_pcap_exit(void)
-{
-	platform_driver_unregister(&pcap_rtc_driver);
-}
-
-module_init(rtc_pcap_init);
-module_exit(rtc_pcap_exit);
+module_platform_driver_probe(pcap_rtc_driver, pcap_rtc_probe);
 
 MODULE_DESCRIPTION("Motorola pcap rtc driver");
 MODULE_AUTHOR("guiming zhuo <gmzhuo@gmail.com>");
diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 889e3160e701..305c9515e5bb 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -307,7 +307,7 @@ static int pcf8523_probe(struct i2c_client *client,
 	if (err < 0)
 		return err;
 
-	pcf->rtc = rtc_device_register(DRIVER_NAME, &client->dev,
+	pcf->rtc = devm_rtc_device_register(&client->dev, DRIVER_NAME,
 				       &pcf8523_rtc_ops, THIS_MODULE);
 	if (IS_ERR(pcf->rtc))
 		return PTR_ERR(pcf->rtc);
@@ -319,10 +319,6 @@ static int pcf8523_probe(struct i2c_client *client,
 
 static int pcf8523_remove(struct i2c_client *client)
 {
-	struct pcf8523 *pcf = i2c_get_clientdata(client);
-
-	rtc_device_unregister(pcf->rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-ps3.c b/drivers/rtc/rtc-ps3.c
index 968133ce1ee8..4bb825bb5804 100644
--- a/drivers/rtc/rtc-ps3.c
+++ b/drivers/rtc/rtc-ps3.c
@@ -62,7 +62,7 @@ static int __init ps3_rtc_probe(struct platform_device *dev)
 {
 	struct rtc_device *rtc;
 
-	rtc = rtc_device_register("rtc-ps3", &dev->dev, &ps3_rtc_ops,
+	rtc = devm_rtc_device_register(&dev->dev, "rtc-ps3", &ps3_rtc_ops,
 				  THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -73,7 +73,6 @@ static int __init ps3_rtc_probe(struct platform_device *dev)
 
 static int __exit ps3_rtc_remove(struct platform_device *dev)
 {
-	rtc_device_unregister(platform_get_drvdata(dev));
 	return 0;
 }
 
@@ -85,18 +84,7 @@ static struct platform_driver ps3_rtc_driver = {
 	.remove = __exit_p(ps3_rtc_remove),
 };
 
-static int __init ps3_rtc_init(void)
-{
-	return platform_driver_probe(&ps3_rtc_driver, ps3_rtc_probe);
-}
-
-static void __exit ps3_rtc_fini(void)
-{
-	platform_driver_unregister(&ps3_rtc_driver);
-}
-
-module_init(ps3_rtc_init);
-module_exit(ps3_rtc_fini);
+module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe);
 
 MODULE_AUTHOR("Sony Corporation");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c
index 03c85ee719a7..a2c75c1ed4cc 100644
--- a/drivers/rtc/rtc-pxa.c
+++ b/drivers/rtc/rtc-pxa.c
@@ -19,6 +19,7 @@
  *
  */
 
+#include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/module.h>
@@ -80,22 +81,29 @@
 #define RYAR1		0x1c
 #define RTCPICR		0x34
 #define PIAR		0x38
+#define PSBR_RTC	0x00
 
 #define rtc_readl(pxa_rtc, reg)	\
 	__raw_readl((pxa_rtc)->base + (reg))
 #define rtc_writel(pxa_rtc, reg, value)	\
 	__raw_writel((value), (pxa_rtc)->base + (reg))
+#define rtc_readl_psbr(pxa_rtc, reg)	\
+	__raw_readl((pxa_rtc)->base_psbr + (reg))
+#define rtc_writel_psbr(pxa_rtc, reg, value)	\
+	__raw_writel((value), (pxa_rtc)->base_psbr + (reg))
 
 struct pxa_rtc {
 	struct resource	*ress;
+	struct resource	*ress_psbr;
 	void __iomem		*base;
+	void __iomem		*base_psbr;
 	int			irq_1Hz;
 	int			irq_Alrm;
 	struct rtc_device	*rtc;
 	spinlock_t		lock;		/* Protects this structure */
 };
 
-
+static struct pxa_rtc *rtc_info;
 static u32 ryxr_calc(struct rtc_time *tm)
 {
 	return ((tm->tm_year + 1900) << RYxR_YEAR_S)
@@ -117,7 +125,7 @@ static void tm_calc(u32 rycr, u32 rdcr, struct rtc_time *tm)
 	tm->tm_year = ((rycr & RYxR_YEAR_MASK) >> RYxR_YEAR_S) - 1900;
 	tm->tm_mon = (((rycr & RYxR_MONTH_MASK) >> RYxR_MONTH_S)) - 1;
 	tm->tm_mday = (rycr & RYxR_DAY_MASK);
-	tm->tm_wday = ((rycr & RDxR_DOW_MASK) >> RDxR_DOW_S) - 1;
+	tm->tm_wday = ((rdcr & RDxR_DOW_MASK) >> RDxR_DOW_S) - 1;
 	tm->tm_hour = (rdcr & RDxR_HOUR_MASK) >> RDxR_HOUR_S;
 	tm->tm_min = (rdcr & RDxR_MIN_MASK) >> RDxR_MIN_S;
 	tm->tm_sec = rdcr & RDxR_SEC_MASK;
@@ -175,7 +183,6 @@ static irqreturn_t pxa_rtc_irq(int irq, void *dev_id)
 
 	/* enable back rtc interrupts */
 	rtc_writel(pxa_rtc, RTSR, rtsr & ~RTSR_TRIG_MASK);
-
 	spin_unlock(&pxa_rtc->lock);
 	return IRQ_HANDLED;
 }
@@ -250,12 +257,45 @@ static int pxa_rtc_read_time(struct device *dev, struct rtc_time *tm)
 static int pxa_rtc_set_time(struct device *dev, struct rtc_time *tm)
 {
 	struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev);
-
+	/* sequence to wirte pxa rtc register RCNR RDCR RYCR is
+	*1. set PSBR[RWE] bit, take 2x32-khz to complete
+	*2. write to RTC register,take 2x32-khz to complete
+	*3. clear PSBR[RWE] bit,take 2x32-khz to complete
+	*/
+	if ((tm->tm_year < 70) || (tm->tm_year > 138))
+		return -EINVAL;
+	rtc_writel_psbr(rtc_info, PSBR_RTC, 0x01);
+	udelay(100);
 	rtc_writel(pxa_rtc, RYCR, ryxr_calc(tm));
 	rtc_writel(pxa_rtc, RDCR, rdxr_calc(tm));
+	udelay(100);
+	rtc_writel_psbr(rtc_info, PSBR_RTC, 0x00);
+	udelay(100);
+	pxa_rtc_read_time(dev, tm);
+	dev_info(dev, "tm.year = %d, tm.month = %d, tm.day = %d\n",
+			tm->tm_year + 1900, tm->tm_mon, tm->tm_mday);
+	return 0;
+}
 
+int pxa_rtc_sync_time(unsigned int ticks)
+{
+	/* sequence to wirte pxa rtc register RCNR RDCR RYCR is
+	*1. set PSBR[RWE] bit, take 2x32-khz to complete
+	*2. write to RTC register,take 2x32-khz to complete
+	*3. clear PSBR[RWE] bit,take 2x32-khz to complete
+	*/
+	struct rtc_time tm;
+	rtc_time_to_tm(ticks, &tm);
+	rtc_writel_psbr(rtc_info, PSBR_RTC, 0x01);
+	udelay(100);
+	rtc_writel(rtc_info, RYCR, ryxr_calc(&tm));
+	rtc_writel(rtc_info, RDCR, rdxr_calc(&tm));
+	udelay(100);
+	rtc_writel_psbr(rtc_info, PSBR_RTC, 0x00);
+	udelay(100);
 	return 0;
 }
+EXPORT_SYMBOL(pxa_rtc_sync_time);
 
 static int pxa_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 {
@@ -327,7 +367,7 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
 	pxa_rtc = kzalloc(sizeof(struct pxa_rtc), GFP_KERNEL);
 	if (!pxa_rtc)
 		return -ENOMEM;
-
+	rtc_info = pxa_rtc;
 	spin_lock_init(&pxa_rtc->lock);
 	platform_set_drvdata(pdev, pxa_rtc);
 
@@ -337,6 +377,11 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
 		dev_err(dev, "No I/O memory resource defined\n");
 		goto err_ress;
 	}
+	pxa_rtc->ress_psbr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (!pxa_rtc->ress_psbr) {
+		dev_err(dev, "No I/O memory resource defined\n");
+		goto err_ress;
+	}
 
 	pxa_rtc->irq_1Hz = platform_get_irq(pdev, 0);
 	if (pxa_rtc->irq_1Hz < 0) {
@@ -348,7 +393,6 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
 		dev_err(dev, "No alarm IRQ resource defined\n");
 		goto err_ress;
 	}
-	pxa_rtc_open(dev);
 	ret = -ENOMEM;
 	pxa_rtc->base = ioremap(pxa_rtc->ress->start,
 				resource_size(pxa_rtc->ress));
@@ -357,6 +401,12 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
 		goto err_map;
 	}
 
+	pxa_rtc->base_psbr = ioremap(pxa_rtc->ress_psbr->start,
+				resource_size(pxa_rtc->ress_psbr));
+	if (!pxa_rtc->base_psbr) {
+		dev_err(&pdev->dev, "Unable to map pxa RTC PSBR I/O memory\n");
+		goto err_map;
+	}
 	/*
 	 * If the clock divider is uninitialized then reset it to the
 	 * default value to get the 1Hz clock.
@@ -379,7 +429,7 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
 	}
 
 	device_init_wakeup(dev, 1);
-
+	pxa_rtc_open(dev);
 	return 0;
 
 err_rtc_reg:
@@ -416,7 +466,7 @@ static struct of_device_id pxa_rtc_dt_ids[] = {
 MODULE_DEVICE_TABLE(of, pxa_rtc_dt_ids);
 #endif
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int pxa_rtc_suspend(struct device *dev)
 {
 	struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev);
@@ -434,36 +484,20 @@ static int pxa_rtc_resume(struct device *dev)
 		disable_irq_wake(pxa_rtc->irq_Alrm);
 	return 0;
 }
-
-static const struct dev_pm_ops pxa_rtc_pm_ops = {
-	.suspend	= pxa_rtc_suspend,
-	.resume		= pxa_rtc_resume,
-};
 #endif
 
+static SIMPLE_DEV_PM_OPS(pxa_rtc_pm_ops, pxa_rtc_suspend, pxa_rtc_resume);
+
 static struct platform_driver pxa_rtc_driver = {
 	.remove		= __exit_p(pxa_rtc_remove),
 	.driver		= {
 		.name	= "pxa-rtc",
 		.of_match_table = of_match_ptr(pxa_rtc_dt_ids),
-#ifdef CONFIG_PM
 		.pm	= &pxa_rtc_pm_ops,
-#endif
 	},
 };
 
-static int __init pxa_rtc_init(void)
-{
-	return platform_driver_probe(&pxa_rtc_driver, pxa_rtc_probe);
-}
-
-static void __exit pxa_rtc_exit(void)
-{
-	platform_driver_unregister(&pxa_rtc_driver);
-}
-
-module_init(pxa_rtc_init);
-module_exit(pxa_rtc_exit);
+module_platform_driver_probe(pxa_rtc_driver, pxa_rtc_probe);
 
 MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>");
 MODULE_DESCRIPTION("PXA27x/PXA3xx Realtime Clock Driver (RTC)");
diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c
index 7726f4a4f2d0..0adf5b528129 100644
--- a/drivers/rtc/rtc-r9701.c
+++ b/drivers/rtc/rtc-r9701.c
@@ -154,8 +154,8 @@ static int r9701_probe(struct spi_device *spi)
 		}
 	}
 
-	rtc = rtc_device_register("r9701",
-				&spi->dev, &r9701_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&spi->dev, "r9701",
+				&r9701_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -166,9 +166,6 @@ static int r9701_probe(struct spi_device *spi)
 
 static int r9701_remove(struct spi_device *spi)
 {
-	struct rtc_device *rtc = dev_get_drvdata(&spi->dev);
-
-	rtc_device_unregister(rtc);
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-rc5t583.c b/drivers/rtc/rtc-rc5t583.c
index eb3194d664a8..8eabcf51b35a 100644
--- a/drivers/rtc/rtc-rc5t583.c
+++ b/drivers/rtc/rtc-rc5t583.c
@@ -256,7 +256,7 @@ static int rc5t583_rtc_probe(struct platform_device *pdev)
 	}
 	device_init_wakeup(&pdev->dev, 1);
 
-	ricoh_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	ricoh_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 		&rc5t583_rtc_ops, THIS_MODULE);
 	if (IS_ERR(ricoh_rtc->rtc)) {
 		ret = PTR_ERR(ricoh_rtc->rtc);
@@ -276,13 +276,10 @@ static int rc5t583_rtc_remove(struct platform_device *pdev)
 	struct rc5t583_rtc *rc5t583_rtc = dev_get_drvdata(&pdev->dev);
 
 	rc5t583_rtc_alarm_irq_enable(&rc5t583_rtc->rtc->dev, 0);
-
-	rtc_device_unregister(rc5t583_rtc->rtc);
 	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
-
 static int rc5t583_rtc_suspend(struct device *dev)
 {
 	struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent);
@@ -304,24 +301,18 @@ static int rc5t583_rtc_resume(struct device *dev)
 	return regmap_write(rc5t583->regmap, RC5T583_RTC_CTL1,
 		rc5t583_rtc->irqen);
 }
-
-static const struct dev_pm_ops rc5t583_rtc_pm_ops = {
-	.suspend	= rc5t583_rtc_suspend,
-	.resume		= rc5t583_rtc_resume,
-};
-
-#define DEV_PM_OPS     (&rc5t583_rtc_pm_ops)
-#else
-#define DEV_PM_OPS     NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(rc5t583_rtc_pm_ops, rc5t583_rtc_suspend,
+			rc5t583_rtc_resume);
+
 static struct platform_driver rc5t583_rtc_driver = {
 	.probe		= rc5t583_rtc_probe,
 	.remove		= rc5t583_rtc_remove,
 	.driver		= {
 		.owner	= THIS_MODULE,
 		.name	= "rtc-rc5t583",
-		.pm	= DEV_PM_OPS,
+		.pm	= &rc5t583_rtc_pm_ops,
 	},
 };
 
diff --git a/drivers/rtc/rtc-rp5c01.c b/drivers/rtc/rtc-rp5c01.c
index 359da6d020b9..d25d2f6c0cad 100644
--- a/drivers/rtc/rtc-rp5c01.c
+++ b/drivers/rtc/rtc-rp5c01.c
@@ -294,18 +294,7 @@ static struct platform_driver rp5c01_rtc_driver = {
 	.remove	= __exit_p(rp5c01_rtc_remove),
 };
 
-static int __init rp5c01_rtc_init(void)
-{
-	return platform_driver_probe(&rp5c01_rtc_driver, rp5c01_rtc_probe);
-}
-
-static void __exit rp5c01_rtc_fini(void)
-{
-	platform_driver_unregister(&rp5c01_rtc_driver);
-}
-
-module_init(rp5c01_rtc_init);
-module_exit(rp5c01_rtc_fini);
+module_platform_driver_probe(rp5c01_rtc_driver, rp5c01_rtc_probe);
 
 MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-rs5c313.c b/drivers/rtc/rtc-rs5c313.c
index d98ea5b759c8..8089fc63e403 100644
--- a/drivers/rtc/rtc-rs5c313.c
+++ b/drivers/rtc/rtc-rs5c313.c
@@ -367,7 +367,7 @@ static const struct rtc_class_ops rs5c313_rtc_ops = {
 
 static int rs5c313_rtc_probe(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = rtc_device_register("rs5c313", &pdev->dev,
+	struct rtc_device *rtc = devm_rtc_device_register(&pdev->dev, "rs5c313",
 				&rs5c313_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc))
@@ -380,10 +380,6 @@ static int rs5c313_rtc_probe(struct platform_device *pdev)
 
 static int rs5c313_rtc_remove(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = platform_get_drvdata( pdev );
-
-	rtc_device_unregister(rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c
index f8ee8ad7825e..5032c24ec159 100644
--- a/drivers/rtc/rtc-rv3029c2.c
+++ b/drivers/rtc/rtc-rv3029c2.c
@@ -395,9 +395,8 @@ static int rv3029c2_probe(struct i2c_client *client,
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_EMUL))
 		return -ENODEV;
 
-	rtc = rtc_device_register(client->name,
-				&client->dev, &rv3029c2_rtc_ops,
-				THIS_MODULE);
+	rtc = devm_rtc_device_register(&client->dev, client->name,
+					&rv3029c2_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -407,23 +406,14 @@ static int rv3029c2_probe(struct i2c_client *client,
 	rc = rv3029c2_i2c_get_sr(client, buf);
 	if (rc < 0) {
 		dev_err(&client->dev, "reading status failed\n");
-		goto exit_unregister;
+		return rc;
 	}
 
 	return 0;
-
-exit_unregister:
-	rtc_device_unregister(rtc);
-
-	return rc;
 }
 
 static int rv3029c2_remove(struct i2c_client *client)
 {
-	struct rtc_device *rtc = i2c_get_clientdata(client);
-
-	rtc_device_unregister(rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-rx4581.c b/drivers/rtc/rtc-rx4581.c
index 599ec73ec886..d1b88dbc5c2c 100644
--- a/drivers/rtc/rtc-rx4581.c
+++ b/drivers/rtc/rtc-rx4581.c
@@ -273,8 +273,8 @@ static int rx4581_probe(struct spi_device *spi)
 	if (res != 0)
 		return res;
 
-	rtc = rtc_device_register("rx4581",
-				&spi->dev, &rx4581_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&spi->dev, "rx4581",
+				&rx4581_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -284,9 +284,6 @@ static int rx4581_probe(struct spi_device *spi)
 
 static int rx4581_remove(struct spi_device *spi)
 {
-	struct rtc_device *rtc = dev_get_drvdata(&spi->dev);
-
-	rtc_device_unregister(rtc);
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-rx8581.c b/drivers/rtc/rtc-rx8581.c
index b0c272658fa2..07f3037b18f4 100644
--- a/drivers/rtc/rtc-rx8581.c
+++ b/drivers/rtc/rtc-rx8581.c
@@ -240,8 +240,8 @@ static int rx8581_probe(struct i2c_client *client,
 
 	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
-	rtc = rtc_device_register(rx8581_driver.driver.name,
-				&client->dev, &rx8581_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&client->dev, rx8581_driver.driver.name,
+					&rx8581_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -253,10 +253,6 @@ static int rx8581_probe(struct i2c_client *client,
 
 static int rx8581_remove(struct i2c_client *client)
 {
-	struct rtc_device *rtc = i2c_get_clientdata(client);
-
-	rtc_device_unregister(rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index fb994e9ddc15..653a4dcbfe7d 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -51,7 +51,6 @@ static struct clk *rtc_clk;
 static void __iomem *s3c_rtc_base;
 static int s3c_rtc_alarmno = NO_IRQ;
 static int s3c_rtc_tickno  = NO_IRQ;
-static bool wake_en;
 static enum s3c_cpu_type s3c_rtc_cpu_type;
 
 static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
@@ -423,10 +422,7 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en)
 
 static int s3c_rtc_remove(struct platform_device *dev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(dev);
-
 	platform_set_drvdata(dev, NULL);
-	rtc_device_unregister(rtc);
 
 	s3c_rtc_setaie(&dev->dev, 0);
 
@@ -511,7 +507,7 @@ static int s3c_rtc_probe(struct platform_device *pdev)
 
 	/* register RTC and exit */
 
-	rtc = rtc_device_register("s3c", &pdev->dev, &s3c_rtcops,
+	rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
 				  THIS_MODULE);
 
 	if (IS_ERR(rtc)) {
@@ -574,7 +570,6 @@ static int s3c_rtc_probe(struct platform_device *pdev)
 
  err_alarm_irq:
 	platform_set_drvdata(pdev, NULL);
-	rtc_device_unregister(rtc);
 
  err_nortc:
 	s3c_rtc_enable(pdev, 0);
@@ -583,14 +578,16 @@ static int s3c_rtc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
 /* RTC Power management control */
 
 static int ticnt_save, ticnt_en_save;
+static bool wake_en;
 
-static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+static int s3c_rtc_suspend(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
+
 	clk_enable(rtc_clk);
 	/* save TICNT for anyone using periodic interrupts */
 	ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
@@ -600,19 +597,20 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 	}
 	s3c_rtc_enable(pdev, 0);
 
-	if (device_may_wakeup(&pdev->dev) && !wake_en) {
+	if (device_may_wakeup(dev) && !wake_en) {
 		if (enable_irq_wake(s3c_rtc_alarmno) == 0)
 			wake_en = true;
 		else
-			dev_err(&pdev->dev, "enable_irq_wake failed\n");
+			dev_err(dev, "enable_irq_wake failed\n");
 	}
 	clk_disable(rtc_clk);
 
 	return 0;
 }
 
-static int s3c_rtc_resume(struct platform_device *pdev)
+static int s3c_rtc_resume(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	unsigned int tmp;
 
 	clk_enable(rtc_clk);
@@ -623,7 +621,7 @@ static int s3c_rtc_resume(struct platform_device *pdev)
 		writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
 	}
 
-	if (device_may_wakeup(&pdev->dev) && wake_en) {
+	if (device_may_wakeup(dev) && wake_en) {
 		disable_irq_wake(s3c_rtc_alarmno);
 		wake_en = false;
 	}
@@ -631,11 +629,10 @@ static int s3c_rtc_resume(struct platform_device *pdev)
 
 	return 0;
 }
-#else
-#define s3c_rtc_suspend NULL
-#define s3c_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
+
 #ifdef CONFIG_OF
 static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = {
 	[TYPE_S3C2410] = { TYPE_S3C2410 },
@@ -685,12 +682,11 @@ MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
 static struct platform_driver s3c_rtc_driver = {
 	.probe		= s3c_rtc_probe,
 	.remove		= s3c_rtc_remove,
-	.suspend	= s3c_rtc_suspend,
-	.resume		= s3c_rtc_resume,
 	.id_table	= s3c_rtc_driver_ids,
 	.driver		= {
 		.name	= "s3c-rtc",
 		.owner	= THIS_MODULE,
+		.pm	= &s3c_rtc_pm_ops,
 		.of_match_table	= of_match_ptr(s3c_rtc_dt_match),
 	},
 };
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index 5ec5036df0bc..7e0a0887c256 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -327,7 +327,7 @@ static int sa1100_rtc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int sa1100_rtc_suspend(struct device *dev)
 {
 	struct sa1100_rtc *info = dev_get_drvdata(dev);
@@ -343,13 +343,11 @@ static int sa1100_rtc_resume(struct device *dev)
 		disable_irq_wake(info->irq_alarm);
 	return 0;
 }
-
-static const struct dev_pm_ops sa1100_rtc_pm_ops = {
-	.suspend	= sa1100_rtc_suspend,
-	.resume		= sa1100_rtc_resume,
-};
 #endif
 
+static SIMPLE_DEV_PM_OPS(sa1100_rtc_pm_ops, sa1100_rtc_suspend,
+			sa1100_rtc_resume);
+
 #ifdef CONFIG_OF
 static struct of_device_id sa1100_rtc_dt_ids[] = {
 	{ .compatible = "mrvl,sa1100-rtc", },
@@ -364,9 +362,7 @@ static struct platform_driver sa1100_rtc_driver = {
 	.remove		= sa1100_rtc_remove,
 	.driver		= {
 		.name	= "sa1100-rtc",
-#ifdef CONFIG_PM
 		.pm	= &sa1100_rtc_pm_ops,
-#endif
 		.of_match_table = of_match_ptr(sa1100_rtc_dt_ids),
 	},
 };
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index e55a7635ae5f..8d5bd2e36776 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -790,6 +790,7 @@ static void sh_rtc_set_irq_wake(struct device *dev, int enabled)
 	}
 }
 
+#ifdef CONFIG_PM_SLEEP
 static int sh_rtc_suspend(struct device *dev)
 {
 	if (device_may_wakeup(dev))
@@ -805,33 +806,20 @@ static int sh_rtc_resume(struct device *dev)
 
 	return 0;
 }
+#endif
 
-static const struct dev_pm_ops sh_rtc_dev_pm_ops = {
-	.suspend = sh_rtc_suspend,
-	.resume = sh_rtc_resume,
-};
+static SIMPLE_DEV_PM_OPS(sh_rtc_pm_ops, sh_rtc_suspend, sh_rtc_resume);
 
 static struct platform_driver sh_rtc_platform_driver = {
 	.driver		= {
 		.name	= DRV_NAME,
 		.owner	= THIS_MODULE,
-		.pm	= &sh_rtc_dev_pm_ops,
+		.pm	= &sh_rtc_pm_ops,
 	},
 	.remove		= __exit_p(sh_rtc_remove),
 };
 
-static int __init sh_rtc_init(void)
-{
-	return platform_driver_probe(&sh_rtc_platform_driver, sh_rtc_probe);
-}
-
-static void __exit sh_rtc_exit(void)
-{
-	platform_driver_unregister(&sh_rtc_platform_driver);
-}
-
-module_init(sh_rtc_init);
-module_exit(sh_rtc_exit);
+module_platform_driver_probe(sh_rtc_platform_driver, sh_rtc_probe);
 
 MODULE_DESCRIPTION("SuperH on-chip RTC driver");
 MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index f7d90703db5e..b04f09a1df2a 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -283,7 +283,7 @@ static int snvs_rtc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	data->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	data->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 					&snvs_rtc_ops, THIS_MODULE);
 	if (IS_ERR(data->rtc)) {
 		ret = PTR_ERR(data->rtc);
@@ -296,10 +296,6 @@ static int snvs_rtc_probe(struct platform_device *pdev)
 
 static int snvs_rtc_remove(struct platform_device *pdev)
 {
-	struct snvs_rtc_data *data = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(data->rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c
index a18c3192ed40..db3ef610dd7c 100644
--- a/drivers/rtc/rtc-spear.c
+++ b/drivers/rtc/rtc-spear.c
@@ -400,8 +400,8 @@ static int spear_rtc_probe(struct platform_device *pdev)
 	spin_lock_init(&config->lock);
 	platform_set_drvdata(pdev, config);
 
-	config->rtc = rtc_device_register(pdev->name, &pdev->dev,
-			&spear_rtc_ops, THIS_MODULE);
+	config->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+					&spear_rtc_ops, THIS_MODULE);
 	if (IS_ERR(config->rtc)) {
 		dev_err(&pdev->dev, "can't register RTC device, err %ld\n",
 				PTR_ERR(config->rtc));
@@ -427,7 +427,6 @@ static int spear_rtc_remove(struct platform_device *pdev)
 {
 	struct spear_rtc_config *config = platform_get_drvdata(pdev);
 
-	rtc_device_unregister(config->rtc);
 	spear_rtc_disable_interrupt(config);
 	clk_disable_unprepare(config->clk);
 	device_init_wakeup(&pdev->dev, 0);
diff --git a/drivers/rtc/rtc-starfire.c b/drivers/rtc/rtc-starfire.c
index 5be98bfd7ed3..987b5ec0ae56 100644
--- a/drivers/rtc/rtc-starfire.c
+++ b/drivers/rtc/rtc-starfire.c
@@ -39,8 +39,10 @@ static const struct rtc_class_ops starfire_rtc_ops = {
 
 static int __init starfire_rtc_probe(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = rtc_device_register("starfire", &pdev->dev,
-				     &starfire_rtc_ops, THIS_MODULE);
+	struct rtc_device *rtc;
+
+	rtc = devm_rtc_device_register(&pdev->dev, "starfire",
+				&starfire_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -51,10 +53,6 @@ static int __init starfire_rtc_probe(struct platform_device *pdev)
 
 static int __exit starfire_rtc_remove(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtc);
-
 	return 0;
 }
 
@@ -66,15 +64,4 @@ static struct platform_driver starfire_rtc_driver = {
 	.remove		= __exit_p(starfire_rtc_remove),
 };
 
-static int __init starfire_rtc_init(void)
-{
-	return platform_driver_probe(&starfire_rtc_driver, starfire_rtc_probe);
-}
-
-static void __exit starfire_rtc_exit(void)
-{
-	platform_driver_unregister(&starfire_rtc_driver);
-}
-
-module_init(starfire_rtc_init);
-module_exit(starfire_rtc_exit);
+module_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe);
diff --git a/drivers/rtc/rtc-stk17ta8.c b/drivers/rtc/rtc-stk17ta8.c
index 7e4a6f65cb91..af5e97e3f272 100644
--- a/drivers/rtc/rtc-stk17ta8.c
+++ b/drivers/rtc/rtc-stk17ta8.c
@@ -336,14 +336,13 @@ static int stk17ta8_rtc_probe(struct platform_device *pdev)
 		}
 	}
 
-	pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				  &stk17ta8_rtc_ops, THIS_MODULE);
 	if (IS_ERR(pdata->rtc))
 		return PTR_ERR(pdata->rtc);
 
 	ret = sysfs_create_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr);
-	if (ret)
-		rtc_device_unregister(pdata->rtc);
+
 	return ret;
 }
 
@@ -352,7 +351,6 @@ static int stk17ta8_rtc_remove(struct platform_device *pdev)
 	struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
 	sysfs_remove_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr);
-	rtc_device_unregister(pdata->rtc);
 	if (pdata->irq > 0)
 		writeb(0, pdata->ioaddr + RTC_INTERRUPTS);
 	return 0;
diff --git a/drivers/rtc/rtc-sun4v.c b/drivers/rtc/rtc-sun4v.c
index 59b5c2dcb58c..ce42e5fa9e09 100644
--- a/drivers/rtc/rtc-sun4v.c
+++ b/drivers/rtc/rtc-sun4v.c
@@ -81,8 +81,10 @@ static const struct rtc_class_ops sun4v_rtc_ops = {
 
 static int __init sun4v_rtc_probe(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = rtc_device_register("sun4v", &pdev->dev,
-				     &sun4v_rtc_ops, THIS_MODULE);
+	struct rtc_device *rtc;
+
+	rtc = devm_rtc_device_register(&pdev->dev, "sun4v",
+				&sun4v_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
@@ -92,9 +94,6 @@ static int __init sun4v_rtc_probe(struct platform_device *pdev)
 
 static int __exit sun4v_rtc_remove(struct platform_device *pdev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtc);
 	return 0;
 }
 
@@ -106,18 +105,7 @@ static struct platform_driver sun4v_rtc_driver = {
 	.remove		= __exit_p(sun4v_rtc_remove),
 };
 
-static int __init sun4v_rtc_init(void)
-{
-	return platform_driver_probe(&sun4v_rtc_driver, sun4v_rtc_probe);
-}
-
-static void __exit sun4v_rtc_exit(void)
-{
-	platform_driver_unregister(&sun4v_rtc_driver);
-}
-
-module_init(sun4v_rtc_init);
-module_exit(sun4v_rtc_exit);
+module_platform_driver_probe(sun4v_rtc_driver, sun4v_rtc_probe);
 
 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 MODULE_DESCRIPTION("SUN4V RTC driver");
diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index 7c033756d6b5..7cb3da0e879a 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -26,6 +26,7 @@
 #include <linux/delay.h>
 #include <linux/rtc.h>
 #include <linux/platform_device.h>
+#include <linux/pm.h>
 
 /* set to 1 = busy every eight 32kHz clocks during copy of sec+msec to AHB */
 #define TEGRA_RTC_REG_BUSY			0x004
@@ -309,7 +310,7 @@ static const struct of_device_id tegra_rtc_dt_match[] = {
 };
 MODULE_DEVICE_TABLE(of, tegra_rtc_dt_match);
 
-static int tegra_rtc_probe(struct platform_device *pdev)
+static int __init tegra_rtc_probe(struct platform_device *pdev)
 {
 	struct tegra_rtc_info *info;
 	struct resource *res;
@@ -348,53 +349,34 @@ static int tegra_rtc_probe(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	info->rtc_dev = rtc_device_register(
-		pdev->name, &pdev->dev, &tegra_rtc_ops, THIS_MODULE);
+	info->rtc_dev = devm_rtc_device_register(dev_name(&pdev->dev),
+				&pdev->dev, &tegra_rtc_ops, THIS_MODULE);
 	if (IS_ERR(info->rtc_dev)) {
 		ret = PTR_ERR(info->rtc_dev);
-		info->rtc_dev = NULL;
-		dev_err(&pdev->dev,
-			"Unable to register device (err=%d).\n",
+		dev_err(&pdev->dev, "Unable to register device (err=%d).\n",
 			ret);
 		return ret;
 	}
 
 	ret = devm_request_irq(&pdev->dev, info->tegra_rtc_irq,
 			tegra_rtc_irq_handler, IRQF_TRIGGER_HIGH,
-			"rtc alarm", &pdev->dev);
+			dev_name(&pdev->dev), &pdev->dev);
 	if (ret) {
 		dev_err(&pdev->dev,
 			"Unable to request interrupt for device (err=%d).\n",
 			ret);
-		goto err_dev_unreg;
+		return ret;
 	}
 
 	dev_notice(&pdev->dev, "Tegra internal Real Time Clock\n");
 
 	return 0;
-
-err_dev_unreg:
-	rtc_device_unregister(info->rtc_dev);
-
-	return ret;
 }
 
-static int tegra_rtc_remove(struct platform_device *pdev)
+#ifdef CONFIG_PM_SLEEP
+static int tegra_rtc_suspend(struct device *dev)
 {
-	struct tegra_rtc_info *info = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(info->rtc_dev);
-
-	platform_set_drvdata(pdev, NULL);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int tegra_rtc_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct device *dev = &pdev->dev;
-	struct tegra_rtc_info *info = platform_get_drvdata(pdev);
+	struct tegra_rtc_info *info = dev_get_drvdata(dev);
 
 	tegra_rtc_wait_while_busy(dev);
 
@@ -416,10 +398,9 @@ static int tegra_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 	return 0;
 }
 
-static int tegra_rtc_resume(struct platform_device *pdev)
+static int tegra_rtc_resume(struct device *dev)
 {
-	struct device *dev = &pdev->dev;
-	struct tegra_rtc_info *info = platform_get_drvdata(pdev);
+	struct tegra_rtc_info *info = dev_get_drvdata(dev);
 
 	dev_vdbg(dev, "Resume (device_may_wakeup=%d)\n",
 		device_may_wakeup(dev));
@@ -431,6 +412,8 @@ static int tegra_rtc_resume(struct platform_device *pdev)
 }
 #endif
 
+static SIMPLE_DEV_PM_OPS(tegra_rtc_pm_ops, tegra_rtc_suspend, tegra_rtc_resume);
+
 static void tegra_rtc_shutdown(struct platform_device *pdev)
 {
 	dev_vdbg(&pdev->dev, "disabling interrupts.\n");
@@ -439,30 +422,16 @@ static void tegra_rtc_shutdown(struct platform_device *pdev)
 
 MODULE_ALIAS("platform:tegra_rtc");
 static struct platform_driver tegra_rtc_driver = {
-	.remove		= tegra_rtc_remove,
 	.shutdown	= tegra_rtc_shutdown,
 	.driver		= {
 		.name	= "tegra_rtc",
 		.owner	= THIS_MODULE,
 		.of_match_table = tegra_rtc_dt_match,
+		.pm	= &tegra_rtc_pm_ops,
 	},
-#ifdef CONFIG_PM
-	.suspend	= tegra_rtc_suspend,
-	.resume		= tegra_rtc_resume,
-#endif
 };
 
-static int __init tegra_rtc_init(void)
-{
-	return platform_driver_probe(&tegra_rtc_driver, tegra_rtc_probe);
-}
-module_init(tegra_rtc_init);
-
-static void __exit tegra_rtc_exit(void)
-{
-	platform_driver_unregister(&tegra_rtc_driver);
-}
-module_exit(tegra_rtc_exit);
+module_platform_driver_probe(tegra_rtc_driver, tegra_rtc_probe);
 
 MODULE_AUTHOR("Jon Mayo <jmayo@nvidia.com>");
 MODULE_DESCRIPTION("driver for Tegra internal RTC");
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
index b92e0f6383e6..7746e65b93f2 100644
--- a/drivers/rtc/rtc-test.c
+++ b/drivers/rtc/rtc-test.c
@@ -99,8 +99,10 @@ static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
 static int test_probe(struct platform_device *plat_dev)
 {
 	int err;
-	struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
-						&test_rtc_ops, THIS_MODULE);
+	struct rtc_device *rtc;
+
+	rtc = devm_rtc_device_register(&plat_dev->dev, "test",
+				&test_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc)) {
 		err = PTR_ERR(rtc);
 		return err;
@@ -115,15 +117,11 @@ static int test_probe(struct platform_device *plat_dev)
 	return 0;
 
 err:
-	rtc_device_unregister(rtc);
 	return err;
 }
 
 static int test_remove(struct platform_device *plat_dev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(plat_dev);
-
-	rtc_device_unregister(rtc);
 	device_remove_file(&plat_dev->dev, &dev_attr_irq);
 
 	return 0;
diff --git a/drivers/rtc/rtc-tile.c b/drivers/rtc/rtc-tile.c
index 62db4841078b..249b6531f119 100644
--- a/drivers/rtc/rtc-tile.c
+++ b/drivers/rtc/rtc-tile.c
@@ -80,8 +80,8 @@ static int tile_rtc_probe(struct platform_device *dev)
 {
 	struct rtc_device *rtc;
 
-	rtc = rtc_device_register("tile",
-				  &dev->dev, &tile_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&dev->dev, "tile",
+				&tile_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -96,11 +96,6 @@ static int tile_rtc_probe(struct platform_device *dev)
  */
 static int tile_rtc_remove(struct platform_device *dev)
 {
-	struct rtc_device *rtc = platform_get_drvdata(dev);
-
-	if (rtc)
-		rtc_device_unregister(rtc);
-
 	platform_set_drvdata(dev, NULL);
 
 	return 0;
diff --git a/drivers/rtc/rtc-tps6586x.c b/drivers/rtc/rtc-tps6586x.c
index aab4e8c93622..badfea491a93 100644
--- a/drivers/rtc/rtc-tps6586x.c
+++ b/drivers/rtc/rtc-tps6586x.c
@@ -274,7 +274,7 @@ static int tps6586x_rtc_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, rtc);
-	rtc->rtc = rtc_device_register(dev_name(&pdev->dev), &pdev->dev,
+	rtc->rtc = devm_rtc_device_register(&pdev->dev, dev_name(&pdev->dev),
 				       &tps6586x_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc->rtc)) {
 		ret = PTR_ERR(rtc->rtc);
@@ -306,12 +306,10 @@ fail_rtc_register:
 
 static int tps6586x_rtc_remove(struct platform_device *pdev)
 {
-	struct tps6586x_rtc *rtc = platform_get_drvdata(pdev);
 	struct device *tps_dev = to_tps6586x_dev(&pdev->dev);
 
 	tps6586x_update(tps_dev, RTC_CTRL, 0,
 		RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK);
-	rtc_device_unregister(rtc->rtc);
 	return 0;
 }
 
@@ -335,9 +333,8 @@ static int tps6586x_rtc_resume(struct device *dev)
 }
 #endif
 
-static const struct dev_pm_ops tps6586x_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(tps6586x_rtc_suspend, tps6586x_rtc_resume)
-};
+static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_rtc_suspend,
+			tps6586x_rtc_resume);
 
 static struct platform_driver tps6586x_rtc_driver = {
 	.driver	= {
diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 8bd8115329b5..26b8bd252769 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -276,7 +276,7 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
 	tps_rtc->irq = irq;
 	device_set_wakeup_capable(&pdev->dev, 1);
 
-	tps_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	tps_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 		&tps65910_rtc_ops, THIS_MODULE);
 	if (IS_ERR(tps_rtc->rtc)) {
 		ret = PTR_ERR(tps_rtc->rtc);
@@ -295,12 +295,8 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
  */
 static int tps65910_rtc_remove(struct platform_device *pdev)
 {
-	/* leave rtc running, but disable irqs */
-	struct tps65910_rtc *tps_rtc = platform_get_drvdata(pdev);
-
 	tps65910_rtc_alarm_irq_enable(&pdev->dev, 0);
 
-	rtc_device_unregister(tps_rtc->rtc);
 	return 0;
 }
 
@@ -324,9 +320,8 @@ static int tps65910_rtc_resume(struct device *dev)
 }
 #endif
 
-static const struct dev_pm_ops tps65910_rtc_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(tps65910_rtc_suspend, tps65910_rtc_resume)
-};
+static SIMPLE_DEV_PM_OPS(tps65910_rtc_pm_ops, tps65910_rtc_suspend,
+			tps65910_rtc_resume);
 
 static struct platform_driver tps65910_rtc_driver = {
 	.probe		= tps65910_rtc_probe,
diff --git a/drivers/rtc/rtc-tps80031.c b/drivers/rtc/rtc-tps80031.c
index 9aaf8aaebae9..72662eafb938 100644
--- a/drivers/rtc/rtc-tps80031.c
+++ b/drivers/rtc/rtc-tps80031.c
@@ -277,7 +277,7 @@ static int tps80031_rtc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 			       &tps80031_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc->rtc)) {
 		ret = PTR_ERR(rtc->rtc);
@@ -292,7 +292,6 @@ static int tps80031_rtc_probe(struct platform_device *pdev)
 	if (ret < 0) {
 		dev_err(&pdev->dev, "request IRQ:%d failed, err = %d\n",
 			 rtc->irq, ret);
-		rtc_device_unregister(rtc->rtc);
 		return ret;
 	}
 	device_set_wakeup_capable(&pdev->dev, 1);
@@ -301,9 +300,6 @@ static int tps80031_rtc_probe(struct platform_device *pdev)
 
 static int tps80031_rtc_remove(struct platform_device *pdev)
 {
-	struct tps80031_rtc *rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(rtc->rtc);
 	return 0;
 }
 
@@ -327,9 +323,8 @@ static int tps80031_rtc_resume(struct device *dev)
 };
 #endif
 
-static const struct dev_pm_ops tps80031_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(tps80031_rtc_suspend, tps80031_rtc_resume)
-};
+static SIMPLE_DEV_PM_OPS(tps80031_pm_ops, tps80031_rtc_suspend,
+			tps80031_rtc_resume);
 
 static struct platform_driver tps80031_rtc_driver = {
 	.driver	= {
diff --git a/drivers/rtc/rtc-tx4939.c b/drivers/rtc/rtc-tx4939.c
index a12bfac49d36..f9a0677e4e3b 100644
--- a/drivers/rtc/rtc-tx4939.c
+++ b/drivers/rtc/rtc-tx4939.c
@@ -268,14 +268,13 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev)
 	if (devm_request_irq(&pdev->dev, irq, tx4939_rtc_interrupt,
 			     0, pdev->name, &pdev->dev) < 0)
 		return -EBUSY;
-	rtc = rtc_device_register(pdev->name, &pdev->dev,
+	rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 				  &tx4939_rtc_ops, THIS_MODULE);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 	pdata->rtc = rtc;
 	ret = sysfs_create_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr);
-	if (ret)
-		rtc_device_unregister(rtc);
+
 	return ret;
 }
 
@@ -284,7 +283,6 @@ static int __exit tx4939_rtc_remove(struct platform_device *pdev)
 	struct tx4939rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
 	sysfs_remove_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr);
-	rtc_device_unregister(pdata->rtc);
 	spin_lock_irq(&pdata->lock);
 	tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP);
 	spin_unlock_irq(&pdata->lock);
@@ -299,18 +297,7 @@ static struct platform_driver tx4939_rtc_driver = {
 	},
 };
 
-static int __init tx4939rtc_init(void)
-{
-	return platform_driver_probe(&tx4939_rtc_driver, tx4939_rtc_probe);
-}
-
-static void __exit tx4939rtc_exit(void)
-{
-	platform_driver_unregister(&tx4939_rtc_driver);
-}
-
-module_init(tx4939rtc_init);
-module_exit(tx4939rtc_exit);
+module_platform_driver_probe(tx4939_rtc_driver, tx4939_rtc_probe);
 
 MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
 MODULE_DESCRIPTION("TX4939 internal RTC driver");
diff --git a/drivers/rtc/rtc-v3020.c b/drivers/rtc/rtc-v3020.c
index bca5d677bc85..600798cd4d0c 100644
--- a/drivers/rtc/rtc-v3020.c
+++ b/drivers/rtc/rtc-v3020.c
@@ -49,18 +49,13 @@ struct v3020_chip_ops {
 #define V3020_RD	2
 #define V3020_IO	3
 
-struct v3020_gpio {
-	const char *name;
-	unsigned int gpio;
-};
-
 struct v3020 {
 	/* MMIO access */
 	void __iomem *ioaddress;
 	int leftshift;
 
 	/* GPIO access */
-	struct v3020_gpio *gpio;
+	struct gpio *gpio;
 
 	struct v3020_chip_ops *ops;
 
@@ -107,48 +102,40 @@ static struct v3020_chip_ops v3020_mmio_ops = {
 	.write_bit	= v3020_mmio_write_bit,
 };
 
-static struct v3020_gpio v3020_gpio[] = {
-	{ "RTC CS", 0 },
-	{ "RTC WR", 0 },
-	{ "RTC RD", 0 },
-	{ "RTC IO", 0 },
+static struct gpio v3020_gpio[] = {
+	{ 0, GPIOF_OUT_INIT_HIGH, "RTC CS"},
+	{ 0, GPIOF_OUT_INIT_HIGH, "RTC WR"},
+	{ 0, GPIOF_OUT_INIT_HIGH, "RTC RD"},
+	{ 0, GPIOF_OUT_INIT_HIGH, "RTC IO"},
 };
 
 static int v3020_gpio_map(struct v3020 *chip, struct platform_device *pdev,
 			  struct v3020_platform_data *pdata)
 {
-	int i, err;
+	int err;
 
 	v3020_gpio[V3020_CS].gpio = pdata->gpio_cs;
 	v3020_gpio[V3020_WR].gpio = pdata->gpio_wr;
 	v3020_gpio[V3020_RD].gpio = pdata->gpio_rd;
 	v3020_gpio[V3020_IO].gpio = pdata->gpio_io;
 
-	for (i = 0; i < ARRAY_SIZE(v3020_gpio); i++) {
-		err = gpio_request(v3020_gpio[i].gpio, v3020_gpio[i].name);
-		if (err)
-			goto err_request;
-
-		gpio_direction_output(v3020_gpio[i].gpio, 1);
-	}
+	err = gpio_request_array(v3020_gpio, ARRAY_SIZE(v3020_gpio));
+	if (err)
+		goto err_request;
 
 	chip->gpio = v3020_gpio;
 
 	return 0;
 
 err_request:
-	while (--i >= 0)
-		gpio_free(v3020_gpio[i].gpio);
+	gpio_free_array(v3020_gpio, ARRAY_SIZE(v3020_gpio));
 
 	return err;
 }
 
 static void v3020_gpio_unmap(struct v3020 *chip)
 {
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(v3020_gpio); i++)
-		gpio_free(v3020_gpio[i].gpio);
+	gpio_free_array(v3020_gpio, ARRAY_SIZE(v3020_gpio));
 }
 
 static void v3020_gpio_write_bit(struct v3020 *chip, unsigned char bit)
diff --git a/drivers/rtc/rtc-vt8500.c b/drivers/rtc/rtc-vt8500.c
index a000bc0a8bff..d89efee6d29e 100644
--- a/drivers/rtc/rtc-vt8500.c
+++ b/drivers/rtc/rtc-vt8500.c
@@ -252,7 +252,7 @@ static int vt8500_rtc_probe(struct platform_device *pdev)
 	writel(VT8500_RTC_CR_ENABLE,
 	       vt8500_rtc->regbase + VT8500_RTC_CR);
 
-	vt8500_rtc->rtc = rtc_device_register("vt8500-rtc", &pdev->dev,
+	vt8500_rtc->rtc = devm_rtc_device_register(&pdev->dev, "vt8500-rtc",
 					      &vt8500_rtc_ops, THIS_MODULE);
 	if (IS_ERR(vt8500_rtc->rtc)) {
 		ret = PTR_ERR(vt8500_rtc->rtc);
@@ -266,13 +266,11 @@ static int vt8500_rtc_probe(struct platform_device *pdev)
 	if (ret < 0) {
 		dev_err(&pdev->dev, "can't get irq %i, err %d\n",
 			vt8500_rtc->irq_alarm, ret);
-		goto err_unreg;
+		goto err_return;
 	}
 
 	return 0;
 
-err_unreg:
-	rtc_device_unregister(vt8500_rtc->rtc);
 err_return:
 	return ret;
 }
@@ -281,8 +279,6 @@ static int vt8500_rtc_remove(struct platform_device *pdev)
 {
 	struct vt8500_rtc *vt8500_rtc = platform_get_drvdata(pdev);
 
-	rtc_device_unregister(vt8500_rtc->rtc);
-
 	/* Disable alarm matching */
 	writel(0, vt8500_rtc->regbase + VT8500_RTC_IS);
 
diff --git a/drivers/rtc/rtc-wm831x.c b/drivers/rtc/rtc-wm831x.c
index 2f0ac7b30a0c..8d65b94e5a7e 100644
--- a/drivers/rtc/rtc-wm831x.c
+++ b/drivers/rtc/rtc-wm831x.c
@@ -436,7 +436,7 @@ static int wm831x_rtc_probe(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	wm831x_rtc->rtc = rtc_device_register("wm831x", &pdev->dev,
+	wm831x_rtc->rtc = devm_rtc_device_register(&pdev->dev, "wm831x",
 					      &wm831x_rtc_ops, THIS_MODULE);
 	if (IS_ERR(wm831x_rtc->rtc)) {
 		ret = PTR_ERR(wm831x_rtc->rtc);
@@ -462,10 +462,6 @@ err:
 
 static int wm831x_rtc_remove(struct platform_device *pdev)
 {
-	struct wm831x_rtc *wm831x_rtc = platform_get_drvdata(pdev);
-
-	rtc_device_unregister(wm831x_rtc->rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-wm8350.c b/drivers/rtc/rtc-wm8350.c
index 8ad86ae0d30f..fa247deb9cf4 100644
--- a/drivers/rtc/rtc-wm8350.c
+++ b/drivers/rtc/rtc-wm8350.c
@@ -339,7 +339,7 @@ static const struct rtc_class_ops wm8350_rtc_ops = {
 	.alarm_irq_enable = wm8350_rtc_alarm_irq_enable,
 };
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int wm8350_rtc_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
@@ -375,10 +375,6 @@ static int wm8350_rtc_resume(struct device *dev)
 
 	return 0;
 }
-
-#else
-#define wm8350_rtc_suspend NULL
-#define wm8350_rtc_resume NULL
 #endif
 
 static int wm8350_rtc_probe(struct platform_device *pdev)
@@ -439,8 +435,8 @@ static int wm8350_rtc_probe(struct platform_device *pdev)
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	wm_rtc->rtc = rtc_device_register("wm8350", &pdev->dev,
-					  &wm8350_rtc_ops, THIS_MODULE);
+	wm_rtc->rtc = devm_rtc_device_register(&pdev->dev, "wm8350",
+					&wm8350_rtc_ops, THIS_MODULE);
 	if (IS_ERR(wm_rtc->rtc)) {
 		ret = PTR_ERR(wm_rtc->rtc);
 		dev_err(&pdev->dev, "failed to register RTC: %d\n", ret);
@@ -462,20 +458,15 @@ static int wm8350_rtc_probe(struct platform_device *pdev)
 static int wm8350_rtc_remove(struct platform_device *pdev)
 {
 	struct wm8350 *wm8350 = platform_get_drvdata(pdev);
-	struct wm8350_rtc *wm_rtc = &wm8350->rtc;
 
 	wm8350_free_irq(wm8350, WM8350_IRQ_RTC_SEC, wm8350);
 	wm8350_free_irq(wm8350, WM8350_IRQ_RTC_ALM, wm8350);
 
-	rtc_device_unregister(wm_rtc->rtc);
-
 	return 0;
 }
 
-static struct dev_pm_ops wm8350_rtc_pm_ops = {
-	.suspend = wm8350_rtc_suspend,
-	.resume = wm8350_rtc_resume,
-};
+static SIMPLE_DEV_PM_OPS(wm8350_rtc_pm_ops, wm8350_rtc_suspend,
+			wm8350_rtc_resume);
 
 static struct platform_driver wm8350_rtc_driver = {
 	.probe = wm8350_rtc_probe,
diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c
index f36e59c6bc01..fa9b0679fb60 100644
--- a/drivers/rtc/rtc-x1205.c
+++ b/drivers/rtc/rtc-x1205.c
@@ -630,8 +630,8 @@ static int x1205_probe(struct i2c_client *client,
 
 	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
-	rtc = rtc_device_register(x1205_driver.driver.name, &client->dev,
-				&x1205_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_device_register(&client->dev, x1205_driver.driver.name,
+					&x1205_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
@@ -653,21 +653,13 @@ static int x1205_probe(struct i2c_client *client,
 
 	err = x1205_sysfs_register(&client->dev);
 	if (err)
-		goto exit_devreg;
+		return err;
 
 	return 0;
-
-exit_devreg:
-	rtc_device_unregister(rtc);
-
-	return err;
 }
 
 static int x1205_remove(struct i2c_client *client)
 {
-	struct rtc_device *rtc = i2c_get_clientdata(client);
-
-	rtc_device_unregister(rtc);
 	x1205_sysfs_unregister(&client->dev);
 	return 0;
 }