--- zzzz-none-000/linux-3.10.107/drivers/video/backlight/ot200_bl.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/video/backlight/ot200_bl.c	2021-02-04 17:41:59.000000000 +0000
@@ -118,8 +118,9 @@
 	props.brightness = 100;
 	props.type = BACKLIGHT_RAW;
 
-	bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, data,
-					&ot200_backlight_ops, &props);
+	bl = devm_backlight_device_register(&pdev->dev, dev_name(&pdev->dev),
+					&pdev->dev, data, &ot200_backlight_ops,
+					&props);
 	if (IS_ERR(bl)) {
 		dev_err(&pdev->dev, "failed to register backlight\n");
 		retval = PTR_ERR(bl);
@@ -137,10 +138,6 @@
 
 static int ot200_backlight_remove(struct platform_device *pdev)
 {
-	struct backlight_device *bl = platform_get_drvdata(pdev);
-
-	backlight_device_unregister(bl);
-
 	/* on module unload set brightness to 100% */
 	cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0);
 	cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN);
@@ -155,7 +152,6 @@
 static struct platform_driver ot200_backlight_driver = {
 	.driver		= {
 		.name	= "ot200-backlight",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ot200_backlight_probe,
 	.remove		= ot200_backlight_remove,