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

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

[Laxman Dewangan]

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>
---
 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 8186405..1ac8199 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -348,13 +348,11 @@ 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;
 	}
@@ -366,28 +364,12 @@ 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
@@ -441,7 +423,6 @@ 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

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

[Thierry Reding]

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On Sat, Mar 09, 2013 at 11:43:36PM +0530, Laxman Dewangan wrote:
> 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-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
> ---
>  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 8186405..1ac8199 100644
> --- a/drivers/rtc/rtc-tegra.c
> +++ b/drivers/rtc/rtc-tegra.c
> @@ -348,13 +348,11 @@ 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);

The formatting looks weird on this one. For consistency with the rest of
the file it should look like this:

	info->rtc_dev = devm_rtc_device_register(dev_name(&pdev->dev),
						 &pdev->dev, &tegra_rtc_ops,
						 THIS_MODULE);

With that fixed:

Reviewed-by: Thierry Reding <thierry.reding-RM9K5IK7kjKj5M59NBduVrNAH6kLmebB@public.gmane.org>

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

[Thierry Reding]

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On Sat, Mar 09, 2013 at 11:43:36PM +0530, Laxman Dewangan wrote:
> 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.

And RTC is also an abbreviation. =)

Thierry

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