ia64/linux-2.6.18-xen.hg

view drivers/char/Kconfig @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 099864f50909
children
line source
1 #
2 # Character device configuration
3 #
5 menu "Character devices"
7 config VT
8 bool "Virtual terminal" if EMBEDDED
9 select INPUT
10 default y if !VIOCONS
11 ---help---
12 If you say Y here, you will get support for terminal devices with
13 display and keyboard devices. These are called "virtual" because you
14 can run several virtual terminals (also called virtual consoles) on
15 one physical terminal. This is rather useful, for example one
16 virtual terminal can collect system messages and warnings, another
17 one can be used for a text-mode user session, and a third could run
18 an X session, all in parallel. Switching between virtual terminals
19 is done with certain key combinations, usually Alt-<function key>.
21 The setterm command ("man setterm") can be used to change the
22 properties (such as colors or beeping) of a virtual terminal. The
23 man page console_codes(4) ("man console_codes") contains the special
24 character sequences that can be used to change those properties
25 directly. The fonts used on virtual terminals can be changed with
26 the setfont ("man setfont") command and the key bindings are defined
27 with the loadkeys ("man loadkeys") command.
29 You need at least one virtual terminal device in order to make use
30 of your keyboard and monitor. Therefore, only people configuring an
31 embedded system would want to say N here in order to save some
32 memory; the only way to log into such a system is then via a serial
33 or network connection.
35 If unsure, say Y, or else you won't be able to do much with your new
36 shiny Linux system :-)
38 config VT_CONSOLE
39 bool "Support for console on virtual terminal" if EMBEDDED
40 depends on VT
41 default y
42 ---help---
43 The system console is the device which receives all kernel messages
44 and warnings and which allows logins in single user mode. If you
45 answer Y here, a virtual terminal (the device used to interact with
46 a physical terminal) can be used as system console. This is the most
47 common mode of operations, so you should say Y here unless you want
48 the kernel messages be output only to a serial port (in which case
49 you should say Y to "Console on serial port", below).
51 If you do say Y here, by default the currently visible virtual
52 terminal (/dev/tty0) will be used as system console. You can change
53 that with a kernel command line option such as "console=tty3" which
54 would use the third virtual terminal as system console. (Try "man
55 bootparam" or see the documentation of your boot loader (lilo or
56 loadlin) about how to pass options to the kernel at boot time.)
58 If unsure, say Y.
60 config HW_CONSOLE
61 bool
62 depends on VT && !S390 && !UML
63 default y
65 config VT_HW_CONSOLE_BINDING
66 bool "Support for binding and unbinding console drivers"
67 depends on HW_CONSOLE
68 default n
69 ---help---
70 The virtual terminal is the device that interacts with the physical
71 terminal through console drivers. On these systems, at least one
72 console driver is loaded. In other configurations, additional console
73 drivers may be enabled, such as the framebuffer console. If more than
74 1 console driver is enabled, setting this to 'y' will allow you to
75 select the console driver that will serve as the backend for the
76 virtual terminals.
78 See <file:Documentation/console/console.txt> for more
79 information. For framebuffer console users, please refer to
80 <file:Documentation/fb/fbcon.txt>.
82 config SERIAL_NONSTANDARD
83 bool "Non-standard serial port support"
84 ---help---
85 Say Y here if you have any non-standard serial boards -- boards
86 which aren't supported using the standard "dumb" serial driver.
87 This includes intelligent serial boards such as Cyclades,
88 Digiboards, etc. These are usually used for systems that need many
89 serial ports because they serve many terminals or dial-in
90 connections.
92 Note that the answer to this question won't directly affect the
93 kernel: saying N will just cause the configurator to skip all
94 the questions about non-standard serial boards.
96 Most people can say N here.
98 config COMPUTONE
99 tristate "Computone IntelliPort Plus serial support"
100 depends on SERIAL_NONSTANDARD
101 ---help---
102 This driver supports the entire family of Intelliport II/Plus
103 controllers with the exception of the MicroChannel controllers and
104 products previous to the Intelliport II. These are multiport cards,
105 which give you many serial ports. You would need something like this
106 to connect more than two modems to your Linux box, for instance in
107 order to become a dial-in server. If you have a card like that, say
108 Y here and read <file:Documentation/computone.txt>.
110 To compile this driver as modules, choose M here: the
111 modules will be called ip2 and ip2main.
113 config ROCKETPORT
114 tristate "Comtrol RocketPort support"
115 depends on SERIAL_NONSTANDARD
116 help
117 This driver supports Comtrol RocketPort and RocketModem PCI boards.
118 These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or
119 modems. For information about the RocketPort/RocketModem boards
120 and this driver read <file:Documentation/rocket.txt>.
122 To compile this driver as a module, choose M here: the
123 module will be called rocket.
125 If you want to compile this driver into the kernel, say Y here. If
126 you don't have a Comtrol RocketPort/RocketModem card installed, say N.
128 config CYCLADES
129 tristate "Cyclades async mux support"
130 depends on SERIAL_NONSTANDARD
131 ---help---
132 This driver supports Cyclades Z and Y multiserial boards.
133 You would need something like this to connect more than two modems to
134 your Linux box, for instance in order to become a dial-in server.
136 For information about the Cyclades-Z card, read
137 <file:drivers/char/README.cycladesZ>.
139 To compile this driver as a module, choose M here: the
140 module will be called cyclades.
142 If you haven't heard about it, it's safe to say N.
144 config CYZ_INTR
145 bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)"
146 depends on EXPERIMENTAL && CYCLADES
147 help
148 The Cyclades-Z family of multiport cards allows 2 (two) driver op
149 modes: polling and interrupt. In polling mode, the driver will check
150 the status of the Cyclades-Z ports every certain amount of time
151 (which is called polling cycle and is configurable). In interrupt
152 mode, it will use an interrupt line (IRQ) in order to check the
153 status of the Cyclades-Z ports. The default op mode is polling. If
154 unsure, say N.
156 config DIGIEPCA
157 tristate "Digiboard Intelligent Async Support"
158 depends on SERIAL_NONSTANDARD
159 ---help---
160 This is a driver for Digi International's Xx, Xeve, and Xem series
161 of cards which provide multiple serial ports. You would need
162 something like this to connect more than two modems to your Linux
163 box, for instance in order to become a dial-in server. This driver
164 supports the original PC (ISA) boards as well as PCI, and EISA. If
165 you have a card like this, say Y here and read the file
166 <file:Documentation/digiepca.txt>.
168 To compile this driver as a module, choose M here: the
169 module will be called epca.
171 config ESPSERIAL
172 tristate "Hayes ESP serial port support"
173 depends on SERIAL_NONSTANDARD && ISA && ISA_DMA_API
174 help
175 This is a driver which supports Hayes ESP serial ports. Both single
176 port cards and multiport cards are supported. Make sure to read
177 <file:Documentation/hayes-esp.txt>.
179 To compile this driver as a module, choose M here: the
180 module will be called esp.
182 If unsure, say N.
184 config MOXA_INTELLIO
185 tristate "Moxa Intellio support"
186 depends on SERIAL_NONSTANDARD
187 help
188 Say Y here if you have a Moxa Intellio multiport serial card.
190 To compile this driver as a module, choose M here: the
191 module will be called moxa.
193 config MOXA_SMARTIO
194 tristate "Moxa SmartIO support"
195 depends on SERIAL_NONSTANDARD
196 help
197 Say Y here if you have a Moxa SmartIO multiport serial card.
199 This driver can also be built as a module ( = code which can be
200 inserted in and removed from the running kernel whenever you want).
201 The module will be called mxser. If you want to do that, say M
202 here.
204 config ISI
205 tristate "Multi-Tech multiport card support (EXPERIMENTAL)"
206 depends on SERIAL_NONSTANDARD
207 select FW_LOADER
208 help
209 This is a driver for the Multi-Tech cards which provide several
210 serial ports. The driver is experimental and can currently only be
211 built as a module. The module will be called isicom.
212 If you want to do that, choose M here.
214 config SYNCLINK
215 tristate "Microgate SyncLink card support"
216 depends on SERIAL_NONSTANDARD && PCI && ISA_DMA_API
217 help
218 Provides support for the SyncLink ISA and PCI multiprotocol serial
219 adapters. These adapters support asynchronous and HDLC bit
220 synchronous communication up to 10Mbps (PCI adapter).
222 This driver can only be built as a module ( = code which can be
223 inserted in and removed from the running kernel whenever you want).
224 The module will be called synclink. If you want to do that, say M
225 here.
227 config SYNCLINKMP
228 tristate "SyncLink Multiport support"
229 depends on SERIAL_NONSTANDARD
230 help
231 Enable support for the SyncLink Multiport (2 or 4 ports)
232 serial adapter, running asynchronous and HDLC communications up
233 to 2.048Mbps. Each ports is independently selectable for
234 RS-232, V.35, RS-449, RS-530, and X.21
236 This driver may be built as a module ( = code which can be
237 inserted in and removed from the running kernel whenever you want).
238 The module will be called synclinkmp. If you want to do that, say M
239 here.
241 config SYNCLINK_GT
242 tristate "SyncLink GT/AC support"
243 depends on SERIAL_NONSTANDARD && PCI
244 help
245 Support for SyncLink GT and SyncLink AC families of
246 synchronous and asynchronous serial adapters
247 manufactured by Microgate Systems, Ltd. (www.microgate.com)
249 config N_HDLC
250 tristate "HDLC line discipline support"
251 depends on SERIAL_NONSTANDARD
252 help
253 Allows synchronous HDLC communications with tty device drivers that
254 support synchronous HDLC such as the Microgate SyncLink adapter.
256 This driver can only be built as a module ( = code which can be
257 inserted in and removed from the running kernel whenever you want).
258 The module will be called n_hdlc. If you want to do that, say M
259 here.
261 config RISCOM8
262 tristate "SDL RISCom/8 card support"
263 depends on SERIAL_NONSTANDARD && BROKEN_ON_SMP
264 help
265 This is a driver for the SDL Communications RISCom/8 multiport card,
266 which gives you many serial ports. You would need something like
267 this to connect more than two modems to your Linux box, for instance
268 in order to become a dial-in server. If you have a card like that,
269 say Y here and read the file <file:Documentation/riscom8.txt>.
271 Also it's possible to say M here and compile this driver as kernel
272 loadable module; the module will be called riscom8.
274 config SPECIALIX
275 tristate "Specialix IO8+ card support"
276 depends on SERIAL_NONSTANDARD
277 help
278 This is a driver for the Specialix IO8+ multiport card (both the
279 ISA and the PCI version) which gives you many serial ports. You
280 would need something like this to connect more than two modems to
281 your Linux box, for instance in order to become a dial-in server.
283 If you have a card like that, say Y here and read the file
284 <file:Documentation/specialix.txt>. Also it's possible to say M here
285 and compile this driver as kernel loadable module which will be
286 called specialix.
288 config SPECIALIX_RTSCTS
289 bool "Specialix DTR/RTS pin is RTS"
290 depends on SPECIALIX
291 help
292 The Specialix IO8+ card can only support either RTS or DTR. If you
293 say N here, the driver will use the pin as "DTR" when the tty is in
294 software handshake mode. If you say Y here or hardware handshake is
295 on, it will always be RTS. Read the file
296 <file:Documentation/specialix.txt> for more information.
298 config SX
299 tristate "Specialix SX (and SI) card support"
300 depends on SERIAL_NONSTANDARD
301 help
302 This is a driver for the SX and SI multiport serial cards.
303 Please read the file <file:Documentation/sx.txt> for details.
305 This driver can only be built as a module ( = code which can be
306 inserted in and removed from the running kernel whenever you want).
307 The module will be called sx. If you want to do that, say M here.
309 config RIO
310 tristate "Specialix RIO system support"
311 depends on SERIAL_NONSTANDARD
312 help
313 This is a driver for the Specialix RIO, a smart serial card which
314 drives an outboard box that can support up to 128 ports. Product
315 information is at <http://www.perle.com/support/documentation.html#multiport>.
316 There are both ISA and PCI versions.
318 config RIO_OLDPCI
319 bool "Support really old RIO/PCI cards"
320 depends on RIO
321 help
322 Older RIO PCI cards need some initialization-time configuration to
323 determine the IRQ and some control addresses. If you have a RIO and
324 this doesn't seem to work, try setting this to Y.
326 config STALDRV
327 bool "Stallion multiport serial support"
328 depends on SERIAL_NONSTANDARD
329 help
330 Stallion cards give you many serial ports. You would need something
331 like this to connect more than two modems to your Linux box, for
332 instance in order to become a dial-in server. If you say Y here,
333 you will be asked for your specific card model in the next
334 questions. Make sure to read <file:Documentation/stallion.txt> in
335 this case. If you have never heard about all this, it's safe to
336 say N.
338 config STALLION
339 tristate "Stallion EasyIO or EC8/32 support"
340 depends on STALDRV && BROKEN_ON_SMP
341 help
342 If you have an EasyIO or EasyConnection 8/32 multiport Stallion
343 card, then this is for you; say Y. Make sure to read
344 <file:Documentation/stallion.txt>.
346 To compile this driver as a module, choose M here: the
347 module will be called stallion.
349 config ISTALLION
350 tristate "Stallion EC8/64, ONboard, Brumby support"
351 depends on STALDRV && BROKEN_ON_SMP
352 help
353 If you have an EasyConnection 8/64, ONboard, Brumby or Stallion
354 serial multiport card, say Y here. Make sure to read
355 <file:Documentation/stallion.txt>.
357 To compile this driver as a module, choose M here: the
358 module will be called istallion.
360 config AU1000_UART
361 bool "Enable Au1000 UART Support"
362 depends on SERIAL_NONSTANDARD && MIPS
363 help
364 If you have an Alchemy AU1000 processor (MIPS based) and you want
365 to use serial ports, say Y. Otherwise, say N.
367 config AU1000_SERIAL_CONSOLE
368 bool "Enable Au1000 serial console"
369 depends on AU1000_UART
370 help
371 If you have an Alchemy AU1000 processor (MIPS based) and you want
372 to use a console on a serial port, say Y. Otherwise, say N.
374 config QTRONIX_KEYBOARD
375 bool "Enable Qtronix 990P Keyboard Support"
376 depends on IT8712
377 help
378 Images of Qtronix keyboards are at
379 <http://www.qtronix.com/keyboard.html>.
381 config IT8172_CIR
382 bool
383 depends on QTRONIX_KEYBOARD
384 default y
386 config IT8172_SCR0
387 bool "Enable Smart Card Reader 0 Support "
388 depends on IT8712
389 help
390 Say Y here to support smart-card reader 0 (SCR0) on the Integrated
391 Technology Express, Inc. ITE8172 SBC. Vendor page at
392 <http://www.ite.com.tw/ia/brief_it8172bsp.htm>; picture of the
393 board at <http://www.mvista.com/partners/semiconductor/ite.html>.
395 config IT8172_SCR1
396 bool "Enable Smart Card Reader 1 Support "
397 depends on IT8712
398 help
399 Say Y here to support smart-card reader 1 (SCR1) on the Integrated
400 Technology Express, Inc. ITE8172 SBC. Vendor page at
401 <http://www.ite.com.tw/ia/brief_it8172bsp.htm>; picture of the
402 board at <http://www.mvista.com/partners/semiconductor/ite.html>.
404 config A2232
405 tristate "Commodore A2232 serial support (EXPERIMENTAL)"
406 depends on EXPERIMENTAL && ZORRO && BROKEN_ON_SMP
407 ---help---
408 This option supports the 2232 7-port serial card shipped with the
409 Amiga 2000 and other Zorro-bus machines, dating from 1989. At
410 a max of 19,200 bps, the ports are served by a 6551 ACIA UART chip
411 each, plus a 8520 CIA, and a master 6502 CPU and buffer as well. The
412 ports were connected with 8 pin DIN connectors on the card bracket,
413 for which 8 pin to DB25 adapters were supplied. The card also had
414 jumpers internally to toggle various pinning configurations.
416 This driver can be built as a module; but then "generic_serial"
417 will also be built as a module. This has to be loaded before
418 "ser_a2232". If you want to do this, answer M here.
420 config SGI_SNSC
421 bool "SGI Altix system controller communication support"
422 depends on (IA64_SGI_SN2 || IA64_GENERIC)
423 help
424 If you have an SGI Altix and you want to enable system
425 controller communication from user space (you want this!),
426 say Y. Otherwise, say N.
428 config SGI_TIOCX
429 bool "SGI TIO CX driver support"
430 depends on (IA64_SGI_SN2 || IA64_GENERIC)
431 help
432 If you have an SGI Altix and you have fpga devices attached
433 to your TIO, say Y here, otherwise say N.
435 config SGI_MBCS
436 tristate "SGI FPGA Core Services driver support"
437 depends on SGI_TIOCX
438 help
439 If you have an SGI Altix with an attached SABrick
440 say Y or M here, otherwise say N.
442 source "drivers/serial/Kconfig"
444 config UNIX98_PTYS
445 bool "Unix98 PTY support" if EMBEDDED
446 default y
447 ---help---
448 A pseudo terminal (PTY) is a software device consisting of two
449 halves: a master and a slave. The slave device behaves identical to
450 a physical terminal; the master device is used by a process to
451 read data from and write data to the slave, thereby emulating a
452 terminal. Typical programs for the master side are telnet servers
453 and xterms.
455 Linux has traditionally used the BSD-like names /dev/ptyxx for
456 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
457 has a number of problems. The GNU C library glibc 2.1 and later,
458 however, supports the Unix98 naming standard: in order to acquire a
459 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
460 terminal is then made available to the process and the pseudo
461 terminal slave can be accessed as /dev/pts/<number>. What was
462 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
464 All modern Linux systems use the Unix98 ptys. Say Y unless
465 you're on an embedded system and want to conserve memory.
467 config LEGACY_PTYS
468 bool "Legacy (BSD) PTY support"
469 default y
470 ---help---
471 A pseudo terminal (PTY) is a software device consisting of two
472 halves: a master and a slave. The slave device behaves identical to
473 a physical terminal; the master device is used by a process to
474 read data from and write data to the slave, thereby emulating a
475 terminal. Typical programs for the master side are telnet servers
476 and xterms.
478 Linux has traditionally used the BSD-like names /dev/ptyxx
479 for masters and /dev/ttyxx for slaves of pseudo
480 terminals. This scheme has a number of problems, including
481 security. This option enables these legacy devices; on most
482 systems, it is safe to say N.
485 config LEGACY_PTY_COUNT
486 int "Maximum number of legacy PTY in use"
487 depends on LEGACY_PTYS
488 range 1 256
489 default "256"
490 ---help---
491 The maximum number of legacy PTYs that can be used at any one time.
492 The default is 256, and should be more than enough. Embedded
493 systems may want to reduce this to save memory.
495 When not in use, each legacy PTY occupies 12 bytes on 32-bit
496 architectures and 24 bytes on 64-bit architectures.
498 config PRINTER
499 tristate "Parallel printer support"
500 depends on PARPORT
501 ---help---
502 If you intend to attach a printer to the parallel port of your Linux
503 box (as opposed to using a serial printer; if the connector at the
504 printer has 9 or 25 holes ["female"], then it's serial), say Y.
505 Also read the Printing-HOWTO, available from
506 <http://www.tldp.org/docs.html#howto>.
508 It is possible to share one parallel port among several devices
509 (e.g. printer and ZIP drive) and it is safe to compile the
510 corresponding drivers into the kernel.
512 To compile this driver as a module, choose M here and read
513 <file:Documentation/parport.txt>. The module will be called lp.
515 If you have several parallel ports, you can specify which ports to
516 use with the "lp" kernel command line option. (Try "man bootparam"
517 or see the documentation of your boot loader (lilo or loadlin) about
518 how to pass options to the kernel at boot time.) The syntax of the
519 "lp" command line option can be found in <file:drivers/char/lp.c>.
521 If you have more than 8 printers, you need to increase the LP_NO
522 macro in lp.c and the PARPORT_MAX macro in parport.h.
524 config LP_CONSOLE
525 bool "Support for console on line printer"
526 depends on PRINTER
527 ---help---
528 If you want kernel messages to be printed out as they occur, you
529 can have a console on the printer. This option adds support for
530 doing that; to actually get it to happen you need to pass the
531 option "console=lp0" to the kernel at boot time.
533 If the printer is out of paper (or off, or unplugged, or too
534 busy..) the kernel will stall until the printer is ready again.
535 By defining CONSOLE_LP_STRICT to 0 (at your own risk) you
536 can make the kernel continue when this happens,
537 but it'll lose the kernel messages.
539 If unsure, say N.
541 config PPDEV
542 tristate "Support for user-space parallel port device drivers"
543 depends on PARPORT
544 ---help---
545 Saying Y to this adds support for /dev/parport device nodes. This
546 is needed for programs that want portable access to the parallel
547 port, for instance deviceid (which displays Plug-and-Play device
548 IDs).
550 This is the parallel port equivalent of SCSI generic support (sg).
551 It is safe to say N to this -- it is not needed for normal printing
552 or parallel port CD-ROM/disk support.
554 To compile this driver as a module, choose M here: the
555 module will be called ppdev.
557 If unsure, say N.
559 config TIPAR
560 tristate "Texas Instruments parallel link cable support"
561 depends on PARPORT
562 ---help---
563 If you own a Texas Instruments graphing calculator and use a
564 parallel link cable, then you might be interested in this driver.
566 If you enable this driver, you will be able to communicate with
567 your calculator through a set of device nodes under /dev. The
568 main advantage of this driver is that you don't have to be root
569 to use this precise link cable (depending on the permissions on
570 the device nodes, though).
572 To compile this driver as a module, choose M here: the
573 module will be called tipar.
575 If you don't know what a parallel link cable is or what a Texas
576 Instruments graphing calculator is, then you probably don't need this
577 driver.
579 If unsure, say N.
581 config HVC_DRIVER
582 bool
583 help
584 Users of pSeries machines that want to utilize the hvc console front-end
585 module for their backend console driver should select this option.
586 It will automatically be selected if one of the back-end console drivers
587 is selected.
590 config HVC_CONSOLE
591 bool "pSeries Hypervisor Virtual Console support"
592 depends on PPC_PSERIES
593 select HVC_DRIVER
594 help
595 pSeries machines when partitioned support a hypervisor virtual
596 console. This driver allows each pSeries partition to have a console
597 which is accessed via the HMC.
599 config HVC_RTAS
600 bool "IBM RTAS Console support"
601 depends on PPC_RTAS
602 select HVC_DRIVER
603 help
604 IBM Console device driver which makes use of RTAS
606 config HVCS
607 tristate "IBM Hypervisor Virtual Console Server support"
608 depends on PPC_PSERIES
609 help
610 Partitionable IBM Power5 ppc64 machines allow hosting of
611 firmware virtual consoles from one Linux partition by
612 another Linux partition. This driver allows console data
613 from Linux partitions to be accessed through TTY device
614 interfaces in the device tree of a Linux partition running
615 this driver.
617 To compile this driver as a module, choose M here: the
618 module will be called hvcs.ko. Additionally, this module
619 will depend on arch specific APIs exported from hvcserver.ko
620 which will also be compiled when this driver is built as a
621 module.
623 source "drivers/char/ipmi/Kconfig"
625 source "drivers/char/watchdog/Kconfig"
627 config DS1620
628 tristate "NetWinder thermometer support"
629 depends on ARCH_NETWINDER
630 help
631 Say Y here to include support for the thermal management hardware
632 found in the NetWinder. This driver allows the user to control the
633 temperature set points and to read the current temperature.
635 It is also possible to say M here to build it as a module (ds1620)
636 It is recommended to be used on a NetWinder, but it is not a
637 necessity.
639 config NWBUTTON
640 tristate "NetWinder Button"
641 depends on ARCH_NETWINDER
642 ---help---
643 If you say Y here and create a character device node /dev/nwbutton
644 with major and minor numbers 10 and 158 ("man mknod"), then every
645 time the orange button is pressed a number of times, the number of
646 times the button was pressed will be written to that device.
648 This is most useful for applications, as yet unwritten, which
649 perform actions based on how many times the button is pressed in a
650 row.
652 Do not hold the button down for too long, as the driver does not
653 alter the behaviour of the hardware reset circuitry attached to the
654 button; it will still execute a hard reset if the button is held
655 down for longer than approximately five seconds.
657 To compile this driver as a module, choose M here: the
658 module will be called nwbutton.
660 Most people will answer Y to this question and "Reboot Using Button"
661 below to be able to initiate a system shutdown from the button.
663 config NWBUTTON_REBOOT
664 bool "Reboot Using Button"
665 depends on NWBUTTON
666 help
667 If you say Y here, then you will be able to initiate a system
668 shutdown and reboot by pressing the orange button a number of times.
669 The number of presses to initiate the shutdown is two by default,
670 but this can be altered by modifying the value of NUM_PRESSES_REBOOT
671 in nwbutton.h and recompiling the driver or, if you compile the
672 driver as a module, you can specify the number of presses at load
673 time with "insmod button reboot_count=<something>".
675 config NWFLASH
676 tristate "NetWinder flash support"
677 depends on ARCH_NETWINDER
678 ---help---
679 If you say Y here and create a character device /dev/flash with
680 major 10 and minor 160 you can manipulate the flash ROM containing
681 the NetWinder firmware. Be careful as accidentally overwriting the
682 flash contents can render your computer unbootable. On no account
683 allow random users access to this device. :-)
685 To compile this driver as a module, choose M here: the
686 module will be called nwflash.
688 If you're not sure, say N.
690 source "drivers/char/hw_random/Kconfig"
692 config NVRAM
693 tristate "/dev/nvram support"
694 depends on ATARI || X86 || ARM || GENERIC_NVRAM
695 ---help---
696 If you say Y here and create a character special file /dev/nvram
697 with major number 10 and minor number 144 using mknod ("man mknod"),
698 you get read and write access to the extra bytes of non-volatile
699 memory in the real time clock (RTC), which is contained in every PC
700 and most Ataris. The actual number of bytes varies, depending on the
701 nvram in the system, but is usually 114 (128-14 for the RTC).
703 This memory is conventionally called "CMOS RAM" on PCs and "NVRAM"
704 on Ataris. /dev/nvram may be used to view settings there, or to
705 change them (with some utility). It could also be used to frequently
706 save a few bits of very important data that may not be lost over
707 power-off and for which writing to disk is too insecure. Note
708 however that most NVRAM space in a PC belongs to the BIOS and you
709 should NEVER idly tamper with it. See Ralf Brown's interrupt list
710 for a guide to the use of CMOS bytes by your BIOS.
712 On Atari machines, /dev/nvram is always configured and does not need
713 to be selected.
715 To compile this driver as a module, choose M here: the
716 module will be called nvram.
718 config RTC
719 tristate "Enhanced Real Time Clock Support"
720 depends on !PPC && !PARISC && !IA64 && !M68K && (!SPARC || PCI) && !FRV && !ARM
721 ---help---
722 If you say Y here and create a character special file /dev/rtc with
723 major number 10 and minor number 135 using mknod ("man mknod"), you
724 will get access to the real time clock (or hardware clock) built
725 into your computer.
727 Every PC has such a clock built in. It can be used to generate
728 signals from as low as 1Hz up to 8192Hz, and can also be used
729 as a 24 hour alarm. It reports status information via the file
730 /proc/driver/rtc and its behaviour is set by various ioctls on
731 /dev/rtc.
733 If you run Linux on a multiprocessor machine and said Y to
734 "Symmetric Multi Processing" above, you should say Y here to read
735 and set the RTC in an SMP compatible fashion.
737 If you think you have a use for such a device (such as periodic data
738 sampling), then say Y here, and read <file:Documentation/rtc.txt>
739 for details.
741 To compile this driver as a module, choose M here: the
742 module will be called rtc.
744 config SGI_DS1286
745 tristate "SGI DS1286 RTC support"
746 depends on SGI_IP22
747 help
748 If you say Y here and create a character special file /dev/rtc with
749 major number 10 and minor number 135 using mknod ("man mknod"), you
750 will get access to the real time clock built into your computer.
751 Every SGI has such a clock built in. It reports status information
752 via the file /proc/rtc and its behaviour is set by various ioctls on
753 /dev/rtc.
755 config SGI_IP27_RTC
756 bool "SGI M48T35 RTC support"
757 depends on SGI_IP27
758 help
759 If you say Y here and create a character special file /dev/rtc with
760 major number 10 and minor number 135 using mknod ("man mknod"), you
761 will get access to the real time clock built into your computer.
762 Every SGI has such a clock built in. It reports status information
763 via the file /proc/rtc and its behaviour is set by various ioctls on
764 /dev/rtc.
766 config GEN_RTC
767 tristate "Generic /dev/rtc emulation"
768 depends on RTC!=y && !IA64 && !ARM && !M32R && !SPARC && !FRV
769 ---help---
770 If you say Y here and create a character special file /dev/rtc with
771 major number 10 and minor number 135 using mknod ("man mknod"), you
772 will get access to the real time clock (or hardware clock) built
773 into your computer.
775 It reports status information via the file /proc/driver/rtc and its
776 behaviour is set by various ioctls on /dev/rtc. If you enable the
777 "extended RTC operation" below it will also provide an emulation
778 for RTC_UIE which is required by some programs and may improve
779 precision in some cases.
781 To compile this driver as a module, choose M here: the
782 module will be called genrtc.
784 config GEN_RTC_X
785 bool "Extended RTC operation"
786 depends on GEN_RTC
787 help
788 Provides an emulation for RTC_UIE which is required by some programs
789 and may improve precision of the generic RTC support in some cases.
791 config EFI_RTC
792 bool "EFI Real Time Clock Services"
793 depends on IA64
795 config DS1302
796 tristate "DS1302 RTC support"
797 depends on M32R && (PLAT_M32700UT || PLAT_OPSPUT)
798 help
799 If you say Y here and create a character special file /dev/rtc with
800 major number 121 and minor number 0 using mknod ("man mknod"), you
801 will get access to the real time clock (or hardware clock) built
802 into your computer.
804 config S3C2410_RTC
805 bool "S3C2410 RTC Driver"
806 depends on ARCH_S3C2410
807 help
808 RTC (Realtime Clock) driver for the clock inbuilt into the
809 Samsung S3C2410. This can provide periodic interrupt rates
810 from 1Hz to 64Hz for user programs, and wakeup from Alarm.
812 config COBALT_LCD
813 bool "Support for Cobalt LCD"
814 depends on MIPS_COBALT
815 help
816 This option enables support for the LCD display and buttons found
817 on Cobalt systems through a misc device.
819 config DTLK
820 tristate "Double Talk PC internal speech card support"
821 help
822 This driver is for the DoubleTalk PC, a speech synthesizer
823 manufactured by RC Systems (<http://www.rcsys.com/>). It is also
824 called the `internal DoubleTalk'.
826 To compile this driver as a module, choose M here: the
827 module will be called dtlk.
829 config R3964
830 tristate "Siemens R3964 line discipline"
831 ---help---
832 This driver allows synchronous communication with devices using the
833 Siemens R3964 packet protocol. Unless you are dealing with special
834 hardware like PLCs, you are unlikely to need this.
836 To compile this driver as a module, choose M here: the
837 module will be called n_r3964.
839 If unsure, say N.
841 config APPLICOM
842 tristate "Applicom intelligent fieldbus card support"
843 depends on PCI
844 ---help---
845 This driver provides the kernel-side support for the intelligent
846 fieldbus cards made by Applicom International. More information
847 about these cards can be found on the WWW at the address
848 <http://www.applicom-int.com/>, or by email from David Woodhouse
849 <dwmw2@infradead.org>.
851 To compile this driver as a module, choose M here: the
852 module will be called applicom.
854 If unsure, say N.
856 config SONYPI
857 tristate "Sony Vaio Programmable I/O Control Device support (EXPERIMENTAL)"
858 depends on EXPERIMENTAL && X86 && PCI && INPUT && !64BIT
859 ---help---
860 This driver enables access to the Sony Programmable I/O Control
861 Device which can be found in many (all ?) Sony Vaio laptops.
863 If you have one of those laptops, read
864 <file:Documentation/sonypi.txt>, and say Y or M here.
866 To compile this driver as a module, choose M here: the
867 module will be called sonypi.
869 config TANBAC_TB0219
870 tristate "TANBAC TB0219 base board support"
871 depends TANBAC_TB022X
872 select GPIO_VR41XX
874 menu "Ftape, the floppy tape device driver"
876 config FTAPE
877 tristate "Ftape (QIC-80/Travan) support"
878 depends on BROKEN_ON_SMP && (ALPHA || X86)
879 ---help---
880 If you have a tape drive that is connected to your floppy
881 controller, say Y here.
883 Some tape drives (like the Seagate "Tape Store 3200" or the Iomega
884 "Ditto 3200" or the Exabyte "Eagle TR-3") come with a "high speed"
885 controller of their own. These drives (and their companion
886 controllers) are also supported if you say Y here.
888 If you have a special controller (such as the CMS FC-10, FC-20,
889 Mountain Mach-II, or any controller that is based on the Intel 82078
890 FDC like the high speed controllers by Seagate and Exabyte and
891 Iomega's "Ditto Dash") you must configure it by selecting the
892 appropriate entries from the "Floppy tape controllers" sub-menu
893 below and possibly modify the default values for the IRQ and DMA
894 channel and the IO base in ftape's configuration menu.
896 If you want to use your floppy tape drive on a PCI-bus based system,
897 please read the file <file:drivers/char/ftape/README.PCI>.
899 The ftape kernel driver is also available as a runtime loadable
900 module. To compile this driver as a module, choose M here: the
901 module will be called ftape.
903 source "drivers/char/ftape/Kconfig"
905 endmenu
907 source "drivers/char/agp/Kconfig"
909 source "drivers/char/drm/Kconfig"
911 source "drivers/char/pcmcia/Kconfig"
913 config MWAVE
914 tristate "ACP Modem (Mwave) support"
915 depends on X86
916 select SERIAL_8250
917 ---help---
918 The ACP modem (Mwave) for Linux is a WinModem. It is composed of a
919 kernel driver and a user level application. Together these components
920 support direct attachment to public switched telephone networks (PSTNs)
921 and support selected world wide countries.
923 This version of the ACP Modem driver supports the IBM Thinkpad 600E,
924 600, and 770 that include on board ACP modem hardware.
926 The modem also supports the standard communications port interface
927 (ttySx) and is compatible with the Hayes AT Command Set.
929 The user level application needed to use this driver can be found at
930 the IBM Linux Technology Center (LTC) web site:
931 <http://www.ibm.com/linux/ltc/>.
933 If you own one of the above IBM Thinkpads which has the Mwave chipset
934 in it, say Y.
936 To compile this driver as a module, choose M here: the
937 module will be called mwave.
939 config SCx200_GPIO
940 tristate "NatSemi SCx200 GPIO Support"
941 depends on SCx200
942 select NSC_GPIO
943 help
944 Give userspace access to the GPIO pins on the National
945 Semiconductor SCx200 processors.
947 If compiled as a module, it will be called scx200_gpio.
949 config PC8736x_GPIO
950 tristate "NatSemi PC8736x GPIO Support"
951 depends on X86
952 default SCx200_GPIO # mostly N
953 select NSC_GPIO # needed for support routines
954 help
955 Give userspace access to the GPIO pins on the National
956 Semiconductor PC-8736x (x=[03456]) SuperIO chip. The chip
957 has multiple functional units, inc several managed by
958 hwmon/pc87360 driver. Tested with PC-87366
960 If compiled as a module, it will be called pc8736x_gpio.
962 config NSC_GPIO
963 tristate "NatSemi Base GPIO Support"
964 depends on X86_32
965 # selected by SCx200_GPIO and PC8736x_GPIO
966 # what about 2 selectors differing: m != y
967 help
968 Common support used (and needed) by scx200_gpio and
969 pc8736x_gpio drivers. If those drivers are built as
970 modules, this one will be too, named nsc_gpio
972 config CS5535_GPIO
973 tristate "AMD CS5535/CS5536 GPIO (Geode Companion Device)"
974 depends on X86_32
975 help
976 Give userspace access to the GPIO pins on the AMD CS5535 and
977 CS5536 Geode companion devices.
979 If compiled as a module, it will be called cs5535_gpio.
981 config GPIO_VR41XX
982 tristate "NEC VR4100 series General-purpose I/O Unit support"
983 depends on CPU_VR41XX
985 config RAW_DRIVER
986 tristate "RAW driver (/dev/raw/rawN) (OBSOLETE)"
987 help
988 The raw driver permits block devices to be bound to /dev/raw/rawN.
989 Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O.
990 See the raw(8) manpage for more details.
992 The raw driver is deprecated and will be removed soon.
993 Applications should simply open the device (eg /dev/hda1)
994 with the O_DIRECT flag.
996 config MAX_RAW_DEVS
997 int "Maximum number of RAW devices to support (1-8192)"
998 depends on RAW_DRIVER
999 default "256"
1000 help
1001 The maximum number of RAW devices that are supported.
1002 Default is 256. Increase this number in case you need lots of
1003 raw devices.
1005 config HPET
1006 bool "HPET - High Precision Event Timer" if (X86 || IA64)
1007 default n
1008 depends on ACPI && !XEN
1009 help
1010 If you say Y here, you will have a miscdevice named "/dev/hpet/". Each
1011 open selects one of the timers supported by the HPET. The timers are
1012 non-periodioc and/or periodic.
1014 config HPET_RTC_IRQ
1015 bool "HPET Control RTC IRQ" if !HPET_EMULATE_RTC
1016 default n
1017 depends on HPET
1018 help
1019 If you say Y here, you will disable RTC_IRQ in drivers/char/rtc.c. It
1020 is assumed the platform called hpet_alloc with the RTC IRQ values for
1021 the HPET timers.
1023 config HPET_MMAP
1024 bool "Allow mmap of HPET"
1025 default y
1026 depends on HPET
1027 help
1028 If you say Y here, user applications will be able to mmap
1029 the HPET registers.
1031 In some hardware implementations, the page containing HPET
1032 registers may also contain other things that shouldn't be
1033 exposed to the user. If this applies to your hardware,
1034 say N here.
1036 config HANGCHECK_TIMER
1037 tristate "Hangcheck timer"
1038 depends on X86 || IA64 || PPC64
1039 help
1040 The hangcheck-timer module detects when the system has gone
1041 out to lunch past a certain margin. It can reboot the system
1042 or merely print a warning.
1044 config MMTIMER
1045 tristate "MMTIMER Memory mapped RTC for SGI Altix"
1046 depends on IA64_GENERIC || IA64_SGI_SN2
1047 default y
1048 help
1049 The mmtimer device allows direct userspace access to the
1050 Altix system timer.
1052 source "drivers/char/tpm/Kconfig"
1054 config TELCLOCK
1055 tristate "Telecom clock driver for MPBL0010 ATCA SBC"
1056 depends on EXPERIMENTAL
1057 default n
1058 help
1059 The telecom clock device is specific to the MPBL0010 ATCA computer and
1060 allows direct userspace access to the configuration of the telecom clock
1061 configuration settings. This device is used for hardware synchronization
1062 across the ATCA backplane fabric. Upon loading, the driver exports a
1063 sysfs directory, /sys/devices/platform/telco_clock, with a number of
1064 files for controlling the behavior of this hardware.
1066 endmenu