rtc: nxp-bbnsm: Use resource managed API to simplify code

Use devm_pm_set_wake_irq and devm_device_init_wakeup to cleanup the
error handling code and 'driver.remove()' hook.

Signed-off-by: Peng Fan <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Alexandre Belloni <[e-mail]>

drivers/rtc/rtc-nxp-bbnsm.c

···
 	/* clear all the pending events */
 	regmap_write(bbnsm->regmap, BBNSM_EVENTS, 0x7A);
 
-	device_init_wakeup(&pdev->dev, true);
-	dev_pm_set_wake_irq(&pdev->dev, bbnsm->irq);
+	ret = devm_device_init_wakeup(&pdev->dev);
+	if (ret)
+		dev_err(&pdev->dev, "failed to init wakeup, %d\n", ret);
+
+	ret = devm_pm_set_wake_irq(&pdev->dev, bbnsm->irq);
+	if (ret)
+		dev_err(&pdev->dev, "failed to set wake irq, %d\n", ret);
 
 	ret = devm_request_irq(&pdev->dev, bbnsm->irq, bbnsm_rtc_irq_handler,
 			       IRQF_SHARED, "rtc alarm", &pdev->dev);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to request irq %d: %d\n",
 			bbnsm->irq, ret);
-		goto err;
+		return ret;
 	}
 
 	bbnsm->rtc->ops = &bbnsm_rtc_ops;
 	bbnsm->rtc->range_max = U32_MAX;
 
-	ret = devm_rtc_register_device(bbnsm->rtc);
-	if (ret)
-		goto err;
-
-	return 0;
-
-err:
-	dev_pm_clear_wake_irq(&pdev->dev);
-	device_init_wakeup(&pdev->dev, false);
-	return ret;
-}
-
-static void bbnsm_rtc_remove(struct platform_device *pdev)
-{
-	dev_pm_clear_wake_irq(&pdev->dev);
-	device_init_wakeup(&pdev->dev, false);
+	return devm_rtc_register_device(bbnsm->rtc);
 }
 
 static const struct of_device_id bbnsm_dt_ids[] = {
···
 		.of_match_table = bbnsm_dt_ids,
 	},
 	.probe = bbnsm_rtc_probe,
-	.remove = bbnsm_rtc_remove,
 };
 module_platform_driver(bbnsm_rtc_driver);