drivers/rtc/rtc-tegra.c: use managed rtc_device_register()

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>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index e9f0d530121eae3f46846a08a23850a5ee93a9ad..7cb3da0e879a0ec75519c0059a27e5c425abb6ed 100644 (file)
--- 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;
        }
@@ -367,27 +365,11 @@ 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;
 }
 
@@ -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",