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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/include/linux/usb/role.h
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@@ -13,17 +13,21 @@
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 	USB_ROLE_DEVICE,
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 };
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-typedef int (*usb_role_switch_set_t)(struct device *dev, enum usb_role role);
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-typedef enum usb_role (*usb_role_switch_get_t)(struct device *dev);
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+typedef int (*usb_role_switch_set_t)(struct usb_role_switch *sw,
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+				     enum usb_role role);
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+typedef enum usb_role (*usb_role_switch_get_t)(struct usb_role_switch *sw);
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 /**
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  * struct usb_role_switch_desc - USB Role Switch Descriptor
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+ * @fwnode: The device node to be associated with the role switch
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  * @usb2_port: Optional reference to the host controller port device (USB2)
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  * @usb3_port: Optional reference to the host controller port device (USB3)
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  * @udc: Optional reference to the peripheral controller device
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  * @set: Callback for setting the role
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  * @get: Callback for getting the role (optional)
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  * @allow_userspace_control: If true userspace may change the role through sysfs
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+ * @driver_data: Private data pointer
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+ * @name: Name for the switch (optional)
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  *
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  * @usb2_port and @usb3_port will point to the USB host port and @udc to the USB
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  * device controller behind the USB connector with the role switch. If
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@@ -32,22 +36,85 @@
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  * usb_role_switch_register() before registering the switch.
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  */
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 struct usb_role_switch_desc {
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+	struct fwnode_handle *fwnode;
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 	struct device *usb2_port;
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 	struct device *usb3_port;
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 	struct device *udc;
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 	usb_role_switch_set_t set;
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 	usb_role_switch_get_t get;
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 	bool allow_userspace_control;
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+	void *driver_data;
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+	const char *name;
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 };
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+
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+#if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)
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 int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role);
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 enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw);
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 struct usb_role_switch *usb_role_switch_get(struct device *dev);
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+struct usb_role_switch *fwnode_usb_role_switch_get(struct fwnode_handle *node);
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 void usb_role_switch_put(struct usb_role_switch *sw);
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+
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+struct usb_role_switch *
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+usb_role_switch_find_by_fwnode(const struct fwnode_handle *fwnode);
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 struct usb_role_switch *
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 usb_role_switch_register(struct device *parent,
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 			 const struct usb_role_switch_desc *desc);
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 void usb_role_switch_unregister(struct usb_role_switch *sw);
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65
 
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+void usb_role_switch_set_drvdata(struct usb_role_switch *sw, void *data);
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+void *usb_role_switch_get_drvdata(struct usb_role_switch *sw);
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+#else
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+static inline int usb_role_switch_set_role(struct usb_role_switch *sw,
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+		enum usb_role role)
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+{
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+	return 0;
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+}
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+
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+static inline enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw)
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+{
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+	return USB_ROLE_NONE;
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+}
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+
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+static inline struct usb_role_switch *usb_role_switch_get(struct device *dev)
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+{
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+	return ERR_PTR(-ENODEV);
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+}
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+
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+static inline struct usb_role_switch *
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+fwnode_usb_role_switch_get(struct fwnode_handle *node)
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+{
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+	return ERR_PTR(-ENODEV);
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+}
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+
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+static inline void usb_role_switch_put(struct usb_role_switch *sw) { }
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+
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+static inline struct usb_role_switch *
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+usb_role_switch_find_by_fwnode(const struct fwnode_handle *fwnode)
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+{
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+	return NULL;
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+}
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+
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+static inline struct usb_role_switch *
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+usb_role_switch_register(struct device *parent,
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+			 const struct usb_role_switch_desc *desc)
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+{
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+	return ERR_PTR(-ENODEV);
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+}
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+
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+static inline void usb_role_switch_unregister(struct usb_role_switch *sw) { }
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+
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+static inline void
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+usb_role_switch_set_drvdata(struct usb_role_switch *sw, void *data)
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+{
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+}
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+
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+static inline void *usb_role_switch_get_drvdata(struct usb_role_switch *sw)
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+{
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+	return NULL;
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+}
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+
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+#endif
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+
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 #endif /* __LINUX_USB_ROLE_H */