LXR linux/drivers/usb/core/Kconfig

   1#
   2# USB Core configuration
   3#
   4config USB_ANNOUNCE_NEW_DEVICES
   5        bool "USB announce new devices"
   6        help
   7          Say Y here if you want the USB core to always announce the
   8          idVendor, idProduct, Manufacturer, Product, and SerialNumber
   9          strings for every new USB device to the syslog.  This option is
  10          usually used by distro vendors to help with debugging and to
  11          let users know what specific device was added to the machine
  12          in what location.
  13
  14          If you do not want this kind of information sent to the system
  15          log, or have any doubts about this, say N here.
  16
  17comment "Miscellaneous USB options"
  18
  19config USB_DEFAULT_PERSIST
  20        bool "Enable USB persist by default"
  21        default y
  22        help
  23          Say N here if you don't want USB power session persistence
  24          enabled by default.  If you say N it will make suspended USB
  25          devices that lose power get reenumerated as if they had been
  26          unplugged, causing any mounted filesystems to be lost.  The
  27          persist feature can still be enabled for individual devices
  28          through the power/persist sysfs node. See
  29          Documentation/driver-api/usb/persist.rst for more info.
  30
  31          If you have any questions about this, say Y here, only say N
  32          if you know exactly what you are doing.
  33
  34config USB_DYNAMIC_MINORS
  35        bool "Dynamic USB minor allocation"
  36        help
  37          If you say Y here, the USB subsystem will use dynamic minor
  38          allocation for any device that uses the USB major number.
  39          This means that you can have more than 16 of a single type
  40          of device (like USB printers).
  41
  42          If you are unsure about this, say N here.
  43
  44config USB_OTG
  45        bool "OTG support"
  46        depends on PM
  47        default n
  48        help
  49          The most notable feature of USB OTG is support for a
  50          "Dual-Role" device, which can act as either a device
  51          or a host. The initial role is decided by the type of
  52          plug inserted and can be changed later when two dual
  53          role devices talk to each other.
  54
  55          Select this only if your board has Mini-AB/Micro-AB
  56          connector.
  57
  58config USB_OTG_WHITELIST
  59        bool "Rely on OTG and EH Targeted Peripherals List"
  60        depends on USB
  61        help
  62          If you say Y here, the "otg_whitelist.h" file will be used as a
  63          product whitelist, so USB peripherals not listed there will be
  64          rejected during enumeration.  This behavior is required by the
  65          USB OTG and EH specification for all devices not on your product's
  66          "Targeted Peripherals List".  "Embedded Hosts" are likewise
  67          allowed to support only a limited number of peripherals.
  68
  69config USB_OTG_BLACKLIST_HUB
  70        bool "Disable external hubs"
  71        depends on USB_OTG || EXPERT
  72        help
  73          If you say Y here, then Linux will refuse to enumerate
  74          external hubs.  OTG hosts are allowed to reduce hardware
  75          and software costs by not supporting external hubs.  So
  76          are "Embedded Hosts" that don't offer OTG support.
  77
  78config USB_OTG_FSM
  79        tristate "USB 2.0 OTG FSM implementation"
  80        depends on USB && USB_OTG
  81        select USB_PHY
  82        help
  83          Implements OTG Finite State Machine as specified in On-The-Go
  84          and Embedded Host Supplement to the USB Revision 2.0 Specification.
  85
  86config USB_LEDS_TRIGGER_USBPORT
  87        tristate "USB port LED trigger"
  88        depends on USB && LEDS_TRIGGERS
  89        help
  90          This driver allows LEDs to be controlled by USB events. Enabling this
  91          trigger allows specifying list of USB ports that should turn on LED
  92          when some USB device gets connected.
  93