3  * USB Role Switch Support
10 #include <linux/usb/role.h>
25 	enum usb_role role;  member
40  * usb_role_switch_set_role - Set USB role for a switch
41  * @sw: USB role switch
42  * @role: USB role to be switched to
44  * Set USB role @role for @sw.
46 int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role)  in usb_role_switch_set_role()  argument
58 	ret = sw->set(sw, role);  in usb_role_switch_set_role()
60 		sw->role = role;  in usb_role_switch_set_role()
71  * usb_role_switch_get_role - Get the USB role for a switch
72  * @sw: USB role switch
74  * Depending on the role-switch-driver this function returns either a cached
75  * value of the last set role, or reads back the actual value from the hardware.
79 	enum usb_role role;  in usb_role_switch_get_role()  local
87 		role = sw->get(sw);  in usb_role_switch_get_role()
89 		role = sw->role;  in usb_role_switch_get_role()
93 	return role;  in usb_role_switch_get_role()
116 	if (!fwnode_property_present(parent, "usb-role-switch")) {  in usb_role_switch_is_parent()
127  * usb_role_switch_get - Find USB role switch linked with the caller
130  * Finds and returns role switch linked with @dev. The reference count for the
139 		sw = device_connection_find_match(dev, "usb-role-switch", NULL,  in usb_role_switch_get()
150  * fwnode_usb_role_switch_get - Find USB role switch linked with the caller
162 		sw = fwnode_connection_find_match(fwnode, "usb-role-switch",  in fwnode_usb_role_switch_get()
173  * @sw: USB Role Switch
187  * usb_role_switch_find_by_fwnode - Find USB role switch with its fwnode
188  * @fwnode: fwnode of the USB Role Switch
190  * Finds and returns role switch with @fwnode. The reference count for the
230 const char *usb_role_string(enum usb_role role)  in usb_role_string()  argument
232 	if (role < 0 || role >= ARRAY_SIZE(usb_roles))  in usb_role_string()
235 	return usb_roles[role];  in usb_role_string()
243 	enum usb_role role = usb_role_switch_get_role(sw);  in role_show()  local
245 	return sprintf(buf, "%s\n", usb_roles[role]);  in role_show()
270 static DEVICE_ATTR_RW(role);
313  * usb_role_switch_register - Register USB Role Switch
317  * USB Role Switch is a device capable or choosing the role for USB connector.
318  * On platforms where the USB controller is dual-role capable, the controller
323  * Returns handle to a new role switch or ERR_PTR. The content of @desc is
355 	dev_set_name(&sw->dev, "%s-role-switch",  in usb_role_switch_register()
374  * usb_role_switch_unregister - Unregsiter USB Role Switch
375  * @sw: USB Role Switch
390  * @sw: USB Role Switch
401  * @sw: USB Role Switch
424 MODULE_DESCRIPTION("USB Role Class");