usb/misc/onboard_usb_dev_pdevs.c

1 // SPDX-License-Identifier: GPL-2.0-only
33  * onboard_dev_create_pdevs -- create platform devices for onboard USB devices
34  * @parent_hub	: parent hub to scan for connected onboard devices
35  * @pdev_list	: list of onboard platform devices owned by the parent hub
38  * to the given parent hub. The platform device is in charge of initializing the
44  * by the parent hub.
55  * loop is only executed for the root hub of the primary HCD. Since the function
57  * connected to the root hub of the secondary HCD if needed.
59  * Further there must be only one platform device for onboard hubs with a peer
60  * hub (the hub is a single physical device). To achieve this two measures are
61  * taken: pdevs for onboard hubs with a peer are only created when the function
62  * is called on behalf of the parent hub that is connected to the primary HCD
65  * created if the peer hub doesn't have one already.
70 	struct usb_hcd *hcd = bus_to_hcd(parent_hub->bus);  in onboard_dev_create_pdevs()
75 	if (!parent_hub->dev.of_node)  in onboard_dev_create_pdevs()
78 	if (!parent_hub->parent && !usb_hcd_is_primary_hcd(hcd))  in onboard_dev_create_pdevs()
81 	for (i = 1; i <= parent_hub->maxchild; i++) {  in onboard_dev_create_pdevs()
89 		npc = of_parse_phandle(np, "peer-hub", 0);  in onboard_dev_create_pdevs()
100 				put_device(&pdev->dev);  in onboard_dev_create_pdevs()
105 		pdev = of_platform_device_create(np, NULL, &parent_hub->dev);  in onboard_dev_create_pdevs()
107 			dev_err(&parent_hub->dev,  in onboard_dev_create_pdevs()
114 			of_platform_device_destroy(&pdev->dev, NULL);  in onboard_dev_create_pdevs()
118 		pdle->pdev = pdev;  in onboard_dev_create_pdevs()
119 		list_add(&pdle->node, pdev_list);  in onboard_dev_create_pdevs()
128  * onboard_dev_destroy_pdevs -- free resources of onboard platform devices
139 		list_del(&pdle->node);  in onboard_dev_destroy_pdevs()
140 		of_platform_device_destroy(&pdle->pdev->dev, NULL);  in onboard_dev_destroy_pdevs()