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path: root/drivers/usb/roles/class.c
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Diffstat (limited to 'drivers/usb/roles/class.c')
-rw-r--r--drivers/usb/roles/class.c43
1 files changed, 39 insertions, 4 deletions
diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c
index 70165dd86b..d7aa913ceb 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>
@@ -36,6 +37,32 @@ 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
@@ -361,6 +388,12 @@ 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");
+ }
+
sw->registered = true;
/* TODO: Symlinks for the host port and the device controller. */
@@ -377,10 +410,12 @@ EXPORT_SYMBOL_GPL(usb_role_switch_register);
*/
void usb_role_switch_unregister(struct usb_role_switch *sw)
{
- if (!IS_ERR_OR_NULL(sw)) {
- sw->registered = false;
- device_unregister(&sw->dev);
- }
+ if (IS_ERR_OR_NULL(sw))
+ return;
+ sw->registered = false;
+ if (dev_fwnode(&sw->dev))
+ component_del(&sw->dev, &connector_ops);
+ device_unregister(&sw->dev);
}
EXPORT_SYMBOL_GPL(usb_role_switch_unregister);