# SPDX-License-Identifier: GPL-2.0## USB Core configuration#config USB_ANNOUNCE_NEW_DEVICES	bool "USB announce new devices"	help	  Say Y here if you want the USB core to always announce the	  idVendor, idProduct, Manufacturer, Product, and SerialNumber	  strings for every new USB device to the syslog.  This option is	  usually used by distro vendors to help with debugging and to	  let users know what specific device was added to the machine	  in what location. 	  If you do not want this kind of information sent to the system	  log, or have any doubts about this, say N here. comment "Miscellaneous USB options" config USB_DEFAULT_PERSIST	bool "Enable USB persist by default"	default y	help	  Say N here if you don't want USB power session persistence	  enabled by default.  If you say N it will make suspended USB	  devices that lose power get reenumerated as if they had been	  unplugged, causing any mounted filesystems to be lost.  The	  persist feature can still be enabled for individual devices	  through the power/persist sysfs node. See	  Documentation/driver-api/usb/persist.rst for more info. 	  If you have any questions about this, say Y here, only say N	  if you know exactly what you are doing. config USB_FEW_INIT_RETRIES	bool "Limit USB device initialization to only a few retries"	help	  When a new USB device is detected, the kernel tries very hard	  to initialize and enumerate it, with lots of nested retry loops.	  This almost always works, but when it fails it can take a long time.	  This option tells the kernel to make only a few retry attempts,	  so that the total time required for a failed initialization is	  no more than 30 seconds (as required by the USB OTG spec). 	  Say N here unless you require new-device enumeration failure to	  occur within 30 seconds (as might be needed in an embedded	  application). config USB_DYNAMIC_MINORS	bool "Dynamic USB minor allocation"	help	  If you say Y here, the USB subsystem will use dynamic minor	  allocation for any device that uses the USB major number.	  This means that you can have more than 16 of a single type	  of device (like USB printers). 	  If you are unsure about this, say N here. config USB_OTG	bool "OTG support"	depends on PM	help	  The most notable feature of USB OTG is support for a	  "Dual-Role" device, which can act as either a device	  or a host. The initial role is decided by the type of	  plug inserted and can be changed later when two dual	  role devices talk to each other. 	  Select this only if your board has Mini-AB/Micro-AB	  connector. config USB_OTG_PRODUCTLIST	bool "Rely on OTG and EH Targeted Peripherals List"	depends on USB	help	  If you say Y here, the "otg_productlist.h" file will be used as a	  product list, so USB peripherals not listed there will be	  rejected during enumeration.  This behavior is required by the	  USB OTG and EH specification for all devices not on your product's	  "Targeted Peripherals List".  "Embedded Hosts" are likewise	  allowed to support only a limited number of peripherals. config USB_OTG_DISABLE_EXTERNAL_HUB	bool "Disable external hubs"	depends on USB_OTG || EXPERT	help	  If you say Y here, then Linux will refuse to enumerate	  external hubs.  OTG hosts are allowed to reduce hardware	  and software costs by not supporting external hubs.  So	  are "Embedded Hosts" that don't offer OTG support. config USB_OTG_FSM	tristate "USB 2.0 OTG FSM implementation"	depends on USB && USB_OTG	select USB_PHY	help	  Implements OTG Finite State Machine as specified in On-The-Go	  and Embedded Host Supplement to the USB Revision 2.0 Specification. config USB_LEDS_TRIGGER_USBPORT	tristate "USB port LED trigger"	depends on USB && LEDS_TRIGGERS	help	  This driver allows LEDs to be controlled by USB events. Enabling this	  trigger allows specifying list of USB ports that should turn on LED	  when some USB device gets connected. config USB_AUTOSUSPEND_DELAY	int "Default autosuspend delay"	depends on USB	default 2	help	  The default autosuspend delay in seconds.  Can be overridden	  with the usbcore.autosuspend command line or module parameter. 	  The default value Linux has always had is 2 seconds.  Change	  this value if you want a different delay and cannot modify	  the command line or module parameter. config USB_DEFAULT_AUTHORIZATION_MODE	int "Default authorization mode for USB devices"	range 0 2	default 1	depends on USB	help	  Select the default USB device authorization mode. Can be overridden	  with usbcore.authorized_default command line or module parameter. 	  This option allows you to choose whether USB devices that are	  connected to the system can be used by default, or if they are	  locked down. 	  With value 0 all connected USB devices with the exception of root	  hub require user space authorization before they can be used. 	  With value 1 (default) no user space authorization is required to	  use connected USB devices. 	  With value 2 all connected USB devices with exception of internal	  USB devices require user space authorization before they can be	  used. Note that in this mode the differentiation between internal	  and external USB devices relies on ACPI, and on systems without	  ACPI selecting value 2 is analogous to selecting value 0. 	  If unsure, keep the default value.