diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb | 9 | ||||
| -rw-r--r-- | drivers/usb/core/port.c | 43 |
2 files changed, 52 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index b6fbe514a86..c8baaf53594 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -227,3 +227,12 @@ Contact: Lan Tianyu <tianyu.lan@intel.com> Description: The /sys/bus/usb/devices/.../(hub interface)/portX is usb port device's sysfs directory. + +What: /sys/bus/usb/devices/.../(hub interface)/portX/connect_type +Date: January 2013 +Contact: Lan Tianyu <tianyu.lan@intel.com> +Description: + Some platforms provide usb port connect types through ACPI. + This attribute is to expose these information to user space. + The file will read "hotplug", "wired" and "not used" if the + information is available, and "unknown" otherwise. diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index 3734850120a..fe5959fc021 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -20,6 +20,48 @@ #include "hub.h" +static const struct attribute_group *port_dev_group[]; + +static ssize_t show_port_connect_type(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct usb_port *port_dev = to_usb_port(dev); + char *result; + + switch (port_dev->connect_type) { + case USB_PORT_CONNECT_TYPE_HOT_PLUG: + result = "hotplug"; + break; + case USB_PORT_CONNECT_TYPE_HARD_WIRED: + result = "hardwired"; + break; + case USB_PORT_NOT_USED: + result = "not used"; + break; + default: + result = "unknown"; + break; + } + + return sprintf(buf, "%s\n", result); +} +static DEVICE_ATTR(connect_type, S_IRUGO, show_port_connect_type, + NULL); + +static struct attribute *port_dev_attrs[] = { + &dev_attr_connect_type.attr, + NULL, +}; + +static struct attribute_group port_dev_attr_grp = { + .attrs = port_dev_attrs, +}; + +static const struct attribute_group *port_dev_group[] = { + &port_dev_attr_grp, + NULL, +}; + static void usb_port_device_release(struct device *dev) { struct usb_port *port_dev = to_usb_port(dev); @@ -45,6 +87,7 @@ int usb_hub_create_port_device(struct usb_hub *hub, int port1) hub->ports[port1 - 1] = port_dev; port_dev->dev.parent = hub->intfdev; + port_dev->dev.groups = port_dev_group; port_dev->dev.type = &usb_port_device_type; dev_set_name(&port_dev->dev, "port%d", port1); |