Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 82eb7da..180caeb 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * drivers/rtc/rtc-pl031.c
  *
@@ -9,11 +10,6 @@
  *
  * Author: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
  * Copyright 2010 (c) ST-Ericsson AB
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 #include <linux/module.h>
 #include <linux/rtc.h>
@@ -310,7 +306,6 @@
 	device_init_wakeup(&adev->dev, false);
 	if (adev->irq[0])
 		free_irq(adev->irq[0], ldata);
-	rtc_device_unregister(ldata->rtc);
 	amba_release_regions(adev);
 
 	return 0;
@@ -383,24 +378,25 @@
 	}
 
 	device_init_wakeup(&adev->dev, true);
-	ldata->rtc = rtc_device_register("pl031", &adev->dev, ops,
-					THIS_MODULE);
-	if (IS_ERR(ldata->rtc)) {
-		ret = PTR_ERR(ldata->rtc);
+	ldata->rtc = devm_rtc_allocate_device(&adev->dev);
+	if (IS_ERR(ldata->rtc))
+		return PTR_ERR(ldata->rtc);
+
+	ldata->rtc->ops = ops;
+
+	ret = rtc_register_device(ldata->rtc);
+	if (ret)
 		goto out;
-	}
 
 	if (adev->irq[0]) {
 		ret = request_irq(adev->irq[0], pl031_interrupt,
 				  vendor->irqflags, "rtc-pl031", ldata);
 		if (ret)
-			goto out_no_irq;
+			goto out;
 		dev_pm_set_wake_irq(&adev->dev, adev->irq[0]);
 	}
 	return 0;
 
-out_no_irq:
-	rtc_device_unregister(ldata->rtc);
 out:
 	amba_release_regions(adev);
 err_req: