--- zzzz-none-000/linux-3.10.107/drivers/mfd/viperboard.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/mfd/viperboard.c	2021-02-04 17:41:59.000000000 +0000
@@ -37,7 +37,7 @@
 
 MODULE_DEVICE_TABLE(usb, vprbrd_table);
 
-static struct mfd_cell vprbrd_devs[] = {
+static const struct mfd_cell vprbrd_devs[] = {
 	{
 		.name = "viperboard-gpio",
 	},
@@ -93,8 +93,8 @@
 		 version >> 8, version & 0xff,
 		 vb->usb_dev->bus->busnum, vb->usb_dev->devnum);
 
-	ret = mfd_add_devices(&interface->dev, -1, vprbrd_devs,
-				ARRAY_SIZE(vprbrd_devs), NULL, 0, NULL);
+	ret = mfd_add_hotplug_devices(&interface->dev, vprbrd_devs,
+				      ARRAY_SIZE(vprbrd_devs));
 	if (ret != 0) {
 		dev_err(&interface->dev, "Failed to add mfd devices to core.");
 		goto error;