1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/usb/of.h>
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
25 struct device_node *usb_of_get_device_node(struct usb_device *hub, int port1)  in usb_of_get_device_node()  argument
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
44  * @udev: USB device
46  * Determine whether a USB device has a so called combined node which is
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()
79 static bool usb_of_has_devices_or_graph(const struct usb_device *hub)  in usb_of_has_devices_or_graph()  argument
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
102  * Get the connect_type of @port1 based on the device node for @hub. If the
104  * @hub has a child device has with a 'reg' property equal to @port1 the
105  * connect_type is "hard-wired". If there isn't an OF graph or child node at
109  * Return: A connect_type for @port1 based on the device node for @hub.
111 enum usb_port_connect_type usb_of_get_connect_type(struct usb_device *hub, int port1)  in usb_of_get_connect_type()  argument
117 	if (!usb_of_has_devices_or_graph(hub))  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()
141 	 * to the port number, i.e. a usb device.  in usb_of_get_connect_type()
143 	child = usb_of_get_device_node(hub, port1);  in usb_of_get_connect_type()
153  * usb_of_get_interface_node() - get a USB interface node
154  * @udev: USB device of interface
158  * Look up the node of a USB interface given its USB device, configuration
170 	for_each_child_of_node(udev->dev.of_node, node) {  in usb_of_get_interface_node()