usb/core/of.c

1 // SPDX-License-Identifier: GPL-2.0
15  * usb_of_get_device_node() - get a USB device node
16  * @hub: hub to which device is connected
17  * @port1: one-based index of port
19  * Look up the node of a USB device given its parent hub device and one-based
30 	for_each_child_of_node(hub->dev.of_node, node) {  in usb_of_get_device_node()
43  * usb_of_has_combined_node() - determine whether a device has a combined node
46  * Determine whether a USB device has a so called combined node which is
47  * shared with its sole interface. This is the case if and only if the device
50  *	1) bDeviceClass is 0 or 9, and
51  *	2) bNumConfigurations is 1, and
52  *	3) bNumInterfaces is 1.
59 	struct usb_device_descriptor *ddesc = &udev->descriptor;  in usb_of_has_combined_node()
62 	if (!udev->dev.of_node)  in usb_of_has_combined_node()
65 	switch (ddesc->bDeviceClass) {  in usb_of_has_combined_node()
68 		if (ddesc->bNumConfigurations == 1) {  in usb_of_has_combined_node()
69 			cdesc = &udev->config->desc;  in usb_of_has_combined_node()
70 			if (cdesc->bNumInterfaces == 1)  in usb_of_has_combined_node()
81 	const struct device_node *np = hub->dev.of_node;  in usb_of_has_devices_or_graph()
98  * usb_of_get_connect_type() - get a USB hub's port connect_type
99  * @hub: hub to which port is for @port1
100  * @port1: one-based index of port
103  * port is described in the OF graph, the connect_type is "hotplug". If the
105  * connect_type is "hard-wired". If there isn't an OF graph or child node at
106  * all then the connect_type is "unknown". Otherwise, the port is considered
120 	/* Assume port is unused if there's a graph or a child node. */  in usb_of_get_connect_type()
123 	np = hub->dev.of_node;  in usb_of_get_connect_type()
126 	 * usb-a-connector compatible node, in the OF graph.  in usb_of_get_connect_type()
129 		ep = of_graph_get_endpoint_by_regs(np, port1, -1);  in usb_of_get_connect_type()
140 	 * Hard-wired ports are child nodes with a reg property corresponding  in usb_of_get_connect_type()
153  * usb_of_get_interface_node() - get a USB interface node
170 	for_each_child_of_node(udev->dev.of_node, node) {  in usb_of_get_interface_node()