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

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.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 16c8373e
......@@ -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)
{
......
......@@ -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);
......
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