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Commit 97760765 authored by Yu Chen's avatar Yu Chen Committed by Greg Kroah-Hartman
Browse files

usb: roles: Introduce stubs for the exiting functions in role.h 



This patch adds stubs for the exiting functions while
CONFIG_USB_ROLE_SWITCH does not enabled.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: default avatarYu Chen <chenyu56@huawei.com>
Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1567070558-29417-6-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3ef8685f

include/linux/usb/role.h

+30 −0
Original line number Diff line number Diff line
@@ -42,6 +42,8 @@ struct usb_role_switch_desc { 
	bool allow_userspace_control;

};





#if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)

int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role);

enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw);

struct usb_role_switch *usb_role_switch_get(struct device *dev);
@@ -51,5 +53,33 @@ struct usb_role_switch * 
usb_role_switch_register(struct device *parent,

			 const struct usb_role_switch_desc *desc);

void usb_role_switch_unregister(struct usb_role_switch *sw);

#else

static inline int usb_role_switch_set_role(struct usb_role_switch *sw,

		enum usb_role role)

{

	return 0;

}



static inline enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw)

{

	return USB_ROLE_NONE;

}



static inline struct usb_role_switch *usb_role_switch_get(struct device *dev)

{

	return ERR_PTR(-ENODEV);

}



static inline void usb_role_switch_put(struct usb_role_switch *sw) { }



static inline struct usb_role_switch *

usb_role_switch_register(struct device *parent,

			 const struct usb_role_switch_desc *desc)

{

	return ERR_PTR(-ENODEV);

}



static inline void usb_role_switch_unregister(struct usb_role_switch *sw) { }

#endif



#endif /* __LINUX_USB_ROLE_H */