[PATCH V2 5/5] rtc: tegra: use managed rtc_device_register

[Laxman Dewangan <ldewangan@nvidia.com>]

Use devm_rtc_device_register for registering RTC device.
This will reduce the code for unregistering RTC device in
cleanup path and remove the implementation of remove
callback of platform driver.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
---
Changes from V1:
- Formatting the code.
- Add Thierry's reviewed by.

 drivers/rtc/rtc-tegra.c |   27 ++++-----------------------
 1 files changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index fe16388..ca01be7 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -349,13 +349,11 @@ static int __init 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;
 	}
@@ -367,28 +365,12 @@ static int __init tegra_rtc_probe(struct platform_device *pdev)
 		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 __exit tegra_rtc_remove(struct platform_device *pdev)
-{
-	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_SLEEP
@@ -440,7 +422,6 @@ static void tegra_rtc_shutdown(struct platform_device *pdev)
 
 MODULE_ALIAS("platform:tegra_rtc");
 static struct platform_driver tegra_rtc_driver = {
-	.remove		= __exit_p(tegra_rtc_remove),
 	.shutdown	= tegra_rtc_shutdown,
 	.driver		= {
 		.name	= "tegra_rtc",
-- 
1.7.1.1