diff options
Diffstat (limited to 'drivers/usb/roles')
| -rw-r--r-- | drivers/usb/roles/class.c | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c index ae41578bd014..4ad03c93c17f 100644 --- a/drivers/usb/roles/class.c +++ b/drivers/usb/roles/class.c @@ -7,6 +7,7 @@ * Hans de Goede <hdegoede@redhat.com> */ +#include <linux/component.h> #include <linux/usb/role.h> #include <linux/property.h> #include <linux/device.h> @@ -34,6 +35,32 @@ struct usb_role_switch { #define to_role_switch(d) container_of(d, struct usb_role_switch, dev) +static int connector_bind(struct device *dev, struct device *connector, void *data) +{ + int ret; + + ret = sysfs_create_link(&dev->kobj, &connector->kobj, "connector"); + if (ret) + return ret; + + ret = sysfs_create_link(&connector->kobj, &dev->kobj, "usb-role-switch"); + if (ret) + sysfs_remove_link(&dev->kobj, "connector"); + + return ret; +} + +static void connector_unbind(struct device *dev, struct device *connector, void *data) +{ + sysfs_remove_link(&connector->kobj, "usb-role-switch"); + sysfs_remove_link(&dev->kobj, "connector"); +} + +static const struct component_ops connector_ops = { + .bind = connector_bind, + .unbind = connector_unbind, +}; + /** * usb_role_switch_set_role - Set USB role for a switch * @sw: USB role switch @@ -352,6 +379,12 @@ usb_role_switch_register(struct device *parent, return ERR_PTR(ret); } + if (dev_fwnode(&sw->dev)) { + ret = component_add(&sw->dev, &connector_ops); + if (ret) + dev_warn(&sw->dev, "failed to add component\n"); + } + /* TODO: Symlinks for the host port and the device controller. */ return sw; @@ -366,8 +399,11 @@ EXPORT_SYMBOL_GPL(usb_role_switch_register); */ void usb_role_switch_unregister(struct usb_role_switch *sw) { - if (!IS_ERR_OR_NULL(sw)) - device_unregister(&sw->dev); + if (IS_ERR_OR_NULL(sw)) + return; + if (dev_fwnode(&sw->dev)) + component_del(&sw->dev, &connector_ops); + device_unregister(&sw->dev); } EXPORT_SYMBOL_GPL(usb_role_switch_unregister); |