3  * USB Role Switch Support
11 #include <linux/usb/role.h>
28 	enum usb_role role;  member
50 	ret = sysfs_create_link(&connector->kobj, &dev->kobj, "usb-role-switch");  in connector_bind()
59 	sysfs_remove_link(&connector->kobj, "usb-role-switch");  in connector_unbind()
69  * usb_role_switch_set_role - Set USB role for a switch
70  * @sw: USB role switch
71  * @role: USB role to be switched to
73  * Set USB role @role for @sw.
75 int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role)  in usb_role_switch_set_role()  argument
87 	ret = sw->set(sw, role);  in usb_role_switch_set_role()
89 		sw->role = role;  in usb_role_switch_set_role()
100  * usb_role_switch_get_role - Get the USB role for a switch
101  * @sw: USB role switch
103  * Depending on the role-switch-driver this function returns either a cached
104  * value of the last set role, or reads back the actual value from the hardware.
108 	enum usb_role role;  in usb_role_switch_get_role()  local
116 		role = sw->get(sw);  in usb_role_switch_get_role()
118 		role = sw->role;  in usb_role_switch_get_role()
122 	return role;  in usb_role_switch_get_role()
145 	if (!fwnode_property_present(parent, "usb-role-switch")) {  in usb_role_switch_is_parent()
156  * usb_role_switch_get - Find USB role switch linked with the caller
159  * Finds and returns role switch linked with @dev. The reference count for the
168 		sw = device_connection_find_match(dev, "usb-role-switch", NULL,  in usb_role_switch_get()
179  * fwnode_usb_role_switch_get - Find USB role switch linked with the caller
191 		sw = fwnode_connection_find_match(fwnode, "usb-role-switch",  in fwnode_usb_role_switch_get()
202  * @sw: USB Role Switch
216  * usb_role_switch_find_by_fwnode - Find USB role switch with its fwnode
217  * @fwnode: fwnode of the USB Role Switch
219  * Finds and returns role switch with @fwnode. The reference count for the
259 const char *usb_role_string(enum usb_role role)  in usb_role_string()  argument
261 	if (role < 0 || role >= ARRAY_SIZE(usb_roles))  in usb_role_string()
264 	return usb_roles[role];  in usb_role_string()
272 	enum usb_role role = usb_role_switch_get_role(sw);  in role_show()  local
274 	return sprintf(buf, "%s\n", usb_roles[role]);  in role_show()
299 static DEVICE_ATTR_RW(role);
344  * usb_role_switch_register - Register USB Role Switch
348  * USB Role Switch is a device capable or choosing the role for USB connector.
349  * On platforms where the USB controller is dual-role capable, the controller
354  * Returns handle to a new role switch or ERR_PTR. The content of @desc is
387 	dev_set_name(&sw->dev, "%s-role-switch",  in usb_role_switch_register()
411  * usb_role_switch_unregister - Unregsiter USB Role Switch
412  * @sw: USB Role Switch
429  * @sw: USB Role Switch
440  * @sw: USB Role Switch
463 MODULE_DESCRIPTION("USB Role Class");