Commit a31f0177 authored by Heikki Krogerus's avatar Heikki Krogerus Committed by Greg Kroah-Hartman
Browse files

usb: roles: Add fwnode_usb_role_switch_get() function 



The fwnode_usb_role_switch_get() function is exactly the
same as usb_role_switch_get(), except that it takes struct
fwnode_handle as parameter instead of struct device.

Signed-off-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Tested-by: default avatarBiju Das <biju.das@bp.renesas.com>
Link: https://lore.kernel.org/r/1567070558-29417-8-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 44493062

drivers/usb/roles/class.c

+20 −0
Original line number Diff line number Diff line
@@ -135,6 +135,26 @@ struct usb_role_switch *usb_role_switch_get(struct device *dev) 
}

EXPORT_SYMBOL_GPL(usb_role_switch_get);



/**

 * fwnode_usb_role_switch_get - Find USB role switch linked with the caller

 * @fwnode: The caller device node

 *

 * This is similar to the usb_role_switch_get() function above, but it searches

 * the switch using fwnode instead of device entry.

 */

struct usb_role_switch *fwnode_usb_role_switch_get(struct fwnode_handle *fwnode)

{

	struct usb_role_switch *sw;



	sw = fwnode_connection_find_match(fwnode, "usb-role-switch", NULL,

					  usb_role_switch_match);

	if (!IS_ERR_OR_NULL(sw))

		WARN_ON(!try_module_get(sw->dev.parent->driver->owner));



	return sw;

}

EXPORT_SYMBOL_GPL(fwnode_usb_role_switch_get);



/**

 * usb_role_switch_put - Release handle to a switch

 * @sw: USB Role Switch

include/linux/usb/role.h

+7 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ struct usb_role_switch_desc { 
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);

struct usb_role_switch *fwnode_usb_role_switch_get(struct fwnode_handle *node);

void usb_role_switch_put(struct usb_role_switch *sw);



struct usb_role_switch *
@@ -70,6 +71,12 @@ static inline struct usb_role_switch *usb_role_switch_get(struct device *dev) 
	return ERR_PTR(-ENODEV);

}



static inline struct usb_role_switch *

fwnode_usb_role_switch_get(struct fwnode_handle *node)

{

	return ERR_PTR(-ENODEV);

}



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



static inline struct usb_role_switch *

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