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  1 #
  2 # USB Core configuration
  3 #
  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.
 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.
 17 comment "Miscellaneous USB options"
 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/usb/persist.txt for more info.
 31           If you have any questions about this, say Y here, only say N
 32           if you know exactly what you are doing.
 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).
 42           If you are unsure about this, say N here.
 44 config 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.
 55           Select this only if your board has Mini-AB/Micro-AB
 56           connector.
 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.
 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.
 78 config USB_OTG_FSM
 79         tristate "USB 2.0 OTG FSM implementation"
 80         depends on USB
 81         select USB_OTG
 82         select USB_PHY
 83         help
 84           Implements OTG Finite State Machine as specified in On-The-Go
 85           and Embedded Host Supplement to the USB Revision 2.0 Specification.
 87 config USB_ULPI_BUS
 88         tristate "USB ULPI PHY interface support"
 89         depends on USB_SUPPORT
 90         help
 91           UTMI+ Low Pin Interface (ULPI) is specification for a commonly used
 92           USB 2.0 PHY interface. The ULPI specification defines a standard set
 93           of registers that can be used to detect the vendor and product which
 94           allows ULPI to be handled as a bus. This module is the driver for that
 95           bus.
 97           The ULPI interfaces (the buses) are registered by the drivers for USB
 98           controllers which support ULPI register access and have ULPI PHY
 99           attached to them. The ULPI PHY drivers themselves are normal PHY
100           drivers.
102           ULPI PHYs provide often functions such as ADP sensing/probing (OTG
103           protocol) and USB charger detection.
105           To compile this driver as a module, choose M here: the module will
106           be called ulpi.

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