1 # SPDX-License-Identifier: GPL-2.0
3 # USB Core configuration
5 config USB_ANNOUNCE_NEW_DEVICES
6 bool "USB announce new devices"
8 Say Y here if you want the USB core to always announce the
9 idVendor, idProduct, Manufacturer, Product, and SerialNumber
10 strings for every new USB device to the syslog. This option is
11 usually used by distro vendors to help with debugging and to
12 let users know what specific device was added to the machine
15 If you do not want this kind of information sent to the system
16 log, or have any doubts about this, say N here.
18 comment "Miscellaneous USB options"
20 config USB_DEFAULT_PERSIST
21 bool "Enable USB persist by default"
24 Say N here if you don't want USB power session persistence
25 enabled by default. If you say N it will make suspended USB
26 devices that lose power get reenumerated as if they had been
27 unplugged, causing any mounted filesystems to be lost. The
28 persist feature can still be enabled for individual devices
29 through the power/persist sysfs node. See
30 Documentation/driver-api/usb/persist.rst for more info.
32 If you have any questions about this, say Y here, only say N
33 if you know exactly what you are doing.
35 config USB_DYNAMIC_MINORS
36 bool "Dynamic USB minor allocation"
38 If you say Y here, the USB subsystem will use dynamic minor
39 allocation for any device that uses the USB major number.
40 This means that you can have more than 16 of a single type
41 of device (like USB printers).
43 If you are unsure about this, say N here.
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
58 config USB_OTG_WHITELIST
59 bool "Rely on OTG and EH Targeted Peripherals List"
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.
69 config USB_OTG_BLACKLIST_HUB
70 bool "Disable external hubs"
71 depends on USB_OTG || EXPERT
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.
79 tristate "USB 2.0 OTG FSM implementation"
80 depends on USB && USB_OTG
83 Implements OTG Finite State Machine as specified in On-The-Go
84 and Embedded Host Supplement to the USB Revision 2.0 Specification.
86 config USB_LEDS_TRIGGER_USBPORT
87 tristate "USB port LED trigger"
88 depends on USB && LEDS_TRIGGERS
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.
94 config USB_AUTOSUSPEND_DELAY
95 int "Default autosuspend delay"
99 The default autosuspend delay in seconds. Can be overridden
100 with the usbcore.autosuspend command line or module parameter.
102 The default value Linux has always had is 2 seconds. Change
103 this value if you want a different delay and cannot modify
104 the command line or module parameter.