rtc: omap: switch to rtc_register_device

This removes a possible race condition and crash and allows for further
improvement of the driver.

Signed-off-by: Alexandre Belloni <[e-mail]>

drivers/rtc/rtc-omap.c

···
 
 	device_init_wakeup(&pdev->dev, true);
 
-	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
-			&omap_rtc_ops, THIS_MODULE);
+	rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
 	if (IS_ERR(rtc->rtc)) {
 		ret = PTR_ERR(rtc->rtc);
 		goto err;
 	}
+
+	rtc->rtc->ops = &omap_rtc_ops;
 
 	/* handle periodic and alarm irqs */
 	ret = devm_request_irq(&pdev->dev, rtc->irq_timer, rtc_irq, 0,
···
 		ret = PTR_ERR(rtc->pctldev);
 		goto err;
 	}
+
+	ret = rtc_register_device(rtc->rtc);
+	if (ret)
+		goto err;
 
 	return 0;