1
2
3
4
5config USB_ANNOUNCE_NEW_DEVICES
6 bool "USB announce new devices"
7 help
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
13 in what location.
14
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.
17
18comment "Miscellaneous USB options"
19
20config USB_DEFAULT_PERSIST
21 bool "Enable USB persist by default"
22 default y
23 help
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.
31
32 If you have any questions about this, say Y here, only say N
33 if you know exactly what you are doing.
34
35config USB_DYNAMIC_MINORS
36 bool "Dynamic USB minor allocation"
37 help
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).
42
43 If you are unsure about this, say N here.
44
45config USB_OTG
46 bool "OTG support"
47 depends on PM
48 default n
49 help
50 The most notable feature of USB OTG is support for a
51 "Dual-Role" device, which can act as either a device
52 or a host. The initial role is decided by the type of
53 plug inserted and can be changed later when two dual
54 role devices talk to each other.
55
56 Select this only if your board has Mini-AB/Micro-AB
57 connector.
58
59config USB_OTG_WHITELIST
60 bool "Rely on OTG and EH Targeted Peripherals List"
61 depends on USB
62 help
63 If you say Y here, the "otg_whitelist.h" file will be used as a
64 product whitelist, so USB peripherals not listed there will be
65 rejected during enumeration. This behavior is required by the
66 USB OTG and EH specification for all devices not on your product's
67 "Targeted Peripherals List". "Embedded Hosts" are likewise
68 allowed to support only a limited number of peripherals.
69
70config USB_OTG_BLACKLIST_HUB
71 bool "Disable external hubs"
72 depends on USB_OTG || EXPERT
73 help
74 If you say Y here, then Linux will refuse to enumerate
75 external hubs. OTG hosts are allowed to reduce hardware
76 and software costs by not supporting external hubs. So
77 are "Embedded Hosts" that don't offer OTG support.
78
79config USB_OTG_FSM
80 tristate "USB 2.0 OTG FSM implementation"
81 depends on USB && 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.
86
87config USB_LEDS_TRIGGER_USBPORT
88 tristate "USB port LED trigger"
89 depends on USB && LEDS_TRIGGERS
90 help
91 This driver allows LEDs to be controlled by USB events. Enabling this
92 trigger allows specifying list of USB ports that should turn on LED
93 when some USB device gets connected.
94
95config USB_AUTOSUSPEND_DELAY
96 int "Default autosuspend delay"
97 depends on USB
98 default 2
99 help
100 The default autosuspend delay in seconds. Can be overridden
101 with the usbcore.autosuspend command line or module parameter.
102
103 The default value Linux has always had is 2 seconds. Change
104 this value if you want a different delay and cannot modify
105 the command line or module parameter.
106
