# 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_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
|
default n
|
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_WHITELIST
|
bool "Rely on OTG and EH Targeted Peripherals List"
|
depends on USB
|
help
|
If you say Y here, the "otg_whitelist.h" file will be used as a
|
product whitelist, 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_BLACKLIST_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.
|
