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| author |   Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2019-10-08 15:25:59 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-04 15:05:25 +0100 |
| commit | c6919d5e0cd168a732034d8dc19fdc3dff683a2b (patch) | |
| tree | 5136c2316bb3fcfd0bdbf677d99e6818b47ce016 /drivers/usb/roles | |
| parent | Merge 5.4-rc6 into usb-next (diff) | |
| download | linux-dev-c6919d5e0cd168a732034d8dc19fdc3dff683a2b.tar.xz linux-dev-c6919d5e0cd168a732034d8dc19fdc3dff683a2b.zip | |
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: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20191008122600.22340-2-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/roles')
| -rw-r--r-- | drivers/usb/roles/class.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c index 94b4e7db2b94..8273126ffdf4 100644 --- a/drivers/usb/roles/class.c +++ b/drivers/usb/roles/class.c @@ -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) { |