--- zzzz-none-000/linux-3.10.107/sound/aoa/soundbus/core.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/aoa/soundbus/core.c	2021-02-04 17:41:59.000000000 +0000
@@ -126,41 +126,15 @@
 		drv->shutdown(soundbus_dev);
 }
 
-#ifdef CONFIG_PM
-
-static int soundbus_device_suspend(struct device *dev, pm_message_t state)
-{
-	struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
-	struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
-
-	if (dev->driver && drv->suspend)
-		return drv->suspend(soundbus_dev, state);
-	return 0;
-}
-
-static int soundbus_device_resume(struct device * dev)
-{
-	struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
-	struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
-
-	if (dev->driver && drv->resume)
-		return drv->resume(soundbus_dev);
-	return 0;
-}
-
-#endif /* CONFIG_PM */
-
+/* soundbus_dev_attrs is declared in sysfs.c */
+ATTRIBUTE_GROUPS(soundbus_dev);
 static struct bus_type soundbus_bus_type = {
 	.name		= "aoa-soundbus",
 	.probe		= soundbus_probe,
 	.uevent		= soundbus_uevent,
 	.remove		= soundbus_device_remove,
 	.shutdown	= soundbus_device_shutdown,
-#ifdef CONFIG_PM
-	.suspend	= soundbus_device_suspend,
-	.resume		= soundbus_device_resume,
-#endif
-	.dev_attrs	= soundbus_dev_attrs,
+	.dev_groups	= soundbus_dev_groups,
 };
 
 int soundbus_add_one(struct soundbus_dev *dev)