diff options
| -rw-r--r-- | drivers/thunderbolt/switch.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 321a5bcfce65..a1b4a695080e 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1835,6 +1835,39 @@ static void tb_switch_release(struct device *dev) kfree(sw); } +static int tb_switch_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct tb_switch *sw = tb_to_switch(dev); + const char *type; + + if (sw->config.thunderbolt_version == USB4_VERSION_1_0) { + if (add_uevent_var(env, "USB4_VERSION=1.0")) + return -ENOMEM; + } + + if (!tb_route(sw)) { + type = "host"; + } else { + const struct tb_port *port; + bool hub = false; + + /* Device is hub if it has any downstream ports */ + tb_switch_for_each_port(sw, port) { + if (!port->disabled && !tb_is_upstream_port(port) && + tb_port_is_null(port)) { + hub = true; + break; + } + } + + type = hub ? "hub" : "device"; + } + + if (add_uevent_var(env, "USB4_TYPE=%s", type)) + return -ENOMEM; + return 0; +} + /* * Currently only need to provide the callbacks. Everything else is handled * in the connection manager. @@ -1868,6 +1901,7 @@ static const struct dev_pm_ops tb_switch_pm_ops = { struct device_type tb_switch_type = { .name = "thunderbolt_device", .release = tb_switch_release, + .uevent = tb_switch_uevent, .pm = &tb_switch_pm_ops, }; |