2 # USB Core configuration
5 bool "USB verbose debug messages"
8 Say Y here if you want the USB core & hub drivers to produce a bunch
9 of debug messages to the system log. Select this if you are having a
10 problem with USB support and want to see more of what is going on.
12 config USB_ANNOUNCE_NEW_DEVICES
13 bool "USB announce new devices"
17 Say Y here if you want the USB core to always announce the
18 idVendor, idProduct, Manufacturer, Product, and SerialNumber
19 strings for every new USB device to the syslog. This option is
20 usually used by distro vendors to help with debugging and to
21 let users know what specific device was added to the machine
24 If you do not want this kind of information sent to the system
25 log, or have any doubts about this, say N here.
27 comment "Miscellaneous USB options"
30 config USB_DEFAULT_PERSIST
31 bool "Enable USB persist by default"
35 Say N here if you don't want USB power session persistance
36 enabled by default. If you say N it will make suspended USB
37 devices that lose power get reenumerated as if they had been
38 unplugged, causing any mounted filesystems to be lost. The
39 persist feature can still be enabled for individual devices
40 through the power/persist sysfs node. See
41 Documentation/usb/persist.txt for more info.
43 If you have any questions about this, say Y here, only say N
44 if you know exactly what you are doing.
46 config USB_DYNAMIC_MINORS
47 bool "Dynamic USB minor allocation"
50 If you say Y here, the USB subsystem will use dynamic minor
51 allocation for any device that uses the USB major number.
52 This means that you can have more than 16 of a single type
53 of device (like USB printers).
55 If you are unsure about this, say N here.
60 depends on USB_SUSPEND
63 The most notable feature of USB OTG is support for a
64 "Dual-Role" device, which can act as either a device
65 or a host. The initial role is decided by the type of
66 plug inserted and can be changed later when two dual
67 role devices talk to each other.
69 Select this only if your board has Mini-AB/Micro-AB
72 config USB_OTG_WHITELIST
73 bool "Rely on OTG Targeted Peripherals List"
74 depends on USB_OTG || EXPERT
77 If you say Y here, the "otg_whitelist.h" file will be used as a
78 product whitelist, so USB peripherals not listed there will be
79 rejected during enumeration. This behavior is required by the
80 USB OTG specification for all devices not on your product's
81 "Targeted Peripherals List". "Embedded Hosts" are likewise
82 allowed to support only a limited number of peripherals.
84 Otherwise, peripherals not listed there will only generate a
85 warning and enumeration will continue. That's more like what
86 normal Linux-USB hosts do (other than the warning), and is
87 convenient for many stages of product development.
89 config USB_OTG_BLACKLIST_HUB
90 bool "Disable external hubs"
91 depends on USB_OTG || EXPERT
93 If you say Y here, then Linux will refuse to enumerate
94 external hubs. OTG hosts are allowed to reduce hardware
95 and software costs by not supporting external hubs. So
96 are "Embedded Hosts" that don't offer OTG support.