Commit c6919d5e authored by Heikki Krogerus's avatar Heikki Krogerus Committed by Greg Kroah-Hartman
Browse files

usb: roles: Add usb_role_switch_find_by_fwnode() 



Simple wrapper function that searches USB role switches with
class_find_device_by_fwnode().

Signed-off-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Tested-by: default avatarHans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20191008122600.22340-2-heikki.krogerus@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 16c8373e

drivers/usb/roles/class.c

+21 −0
Original line number Diff line number Diff line
@@ -175,6 +175,27 @@ void usb_role_switch_put(struct usb_role_switch *sw) 
}

EXPORT_SYMBOL_GPL(usb_role_switch_put);



/**

 * usb_role_switch_find_by_fwnode - Find USB role switch with its fwnode

 * @fwnode: fwnode of the USB Role Switch

 *

 * Finds and returns role switch with @fwnode. The reference count for the

 * found switch is incremented.

 */

struct usb_role_switch *

usb_role_switch_find_by_fwnode(const struct fwnode_handle *fwnode)

{

	struct device *dev;



	if (!fwnode)

		return NULL;



	dev = class_find_device_by_fwnode(role_class, fwnode);



	return dev ? to_role_switch(dev) : NULL;

}

EXPORT_SYMBOL_GPL(usb_role_switch_find_by_fwnode);



static umode_t

usb_role_switch_is_visible(struct kobject *kobj, struct attribute *attr, int n)

{

include/linux/usb/role.h

+3 −0
Original line number Diff line number Diff line
@@ -50,6 +50,9 @@ 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 *

usb_role_switch_find_by_fwnode(const struct fwnode_handle *fwnode);



struct usb_role_switch *

usb_role_switch_register(struct device *parent,

			 const struct usb_role_switch_desc *desc);