diff options
| author |   Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2019-08-29 17:22:34 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-03 16:46:17 +0200 |
| commit | a31f01777bc54a0a9d57628956d05f8d454d3418 (patch) | |
| tree | eabb787a1fc1f028328e58e87a25ed68df1cd246 /drivers/usb | |
| parent | device connection: Add fwnode_connection_find_match() (diff) | |
| download | linux-dev-a31f01777bc54a0a9d57628956d05f8d454d3418.tar.xz linux-dev-a31f01777bc54a0a9d57628956d05f8d454d3418.zip | |
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: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Tested-by: Biju 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/roles/class.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c index 86defca6623e..5b637aaf311f 100644 --- a/drivers/usb/roles/class.c +++ b/drivers/usb/roles/class.c @@ -136,6 +136,26 @@ 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 * |