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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# Character device configuration
3#
4
5menu "Character devices"
6
7config VT
8 bool "Virtual terminal" if EMBEDDED
Martin Schwidefskyabf3ea12007-05-10 15:45:59 +02009 depends on !S390
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 select INPUT
Stephen Rothwell4c514a52008-08-07 14:08:27 +100011 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 ---help---
13 If you say Y here, you will get support for terminal devices with
14 display and keyboard devices. These are called "virtual" because you
15 can run several virtual terminals (also called virtual consoles) on
16 one physical terminal. This is rather useful, for example one
17 virtual terminal can collect system messages and warnings, another
18 one can be used for a text-mode user session, and a third could run
19 an X session, all in parallel. Switching between virtual terminals
20 is done with certain key combinations, usually Alt-<function key>.
21
22 The setterm command ("man setterm") can be used to change the
23 properties (such as colors or beeping) of a virtual terminal. The
24 man page console_codes(4) ("man console_codes") contains the special
25 character sequences that can be used to change those properties
26 directly. The fonts used on virtual terminals can be changed with
27 the setfont ("man setfont") command and the key bindings are defined
28 with the loadkeys ("man loadkeys") command.
29
30 You need at least one virtual terminal device in order to make use
31 of your keyboard and monitor. Therefore, only people configuring an
32 embedded system would want to say N here in order to save some
33 memory; the only way to log into such a system is then via a serial
34 or network connection.
35
36 If unsure, say Y, or else you won't be able to do much with your new
37 shiny Linux system :-)
38
David Woodhousea29ccf6f82008-06-03 14:59:40 +010039config CONSOLE_TRANSLATIONS
40 depends on VT
41 default y
42 bool "Enable character translations in console" if EMBEDDED
43 ---help---
44 This enables support for font mapping and Unicode translation
45 on virtual consoles.
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047config VT_CONSOLE
48 bool "Support for console on virtual terminal" if EMBEDDED
49 depends on VT
50 default y
51 ---help---
52 The system console is the device which receives all kernel messages
53 and warnings and which allows logins in single user mode. If you
54 answer Y here, a virtual terminal (the device used to interact with
55 a physical terminal) can be used as system console. This is the most
56 common mode of operations, so you should say Y here unless you want
57 the kernel messages be output only to a serial port (in which case
58 you should say Y to "Console on serial port", below).
59
60 If you do say Y here, by default the currently visible virtual
61 terminal (/dev/tty0) will be used as system console. You can change
62 that with a kernel command line option such as "console=tty3" which
63 would use the third virtual terminal as system console. (Try "man
64 bootparam" or see the documentation of your boot loader (lilo or
65 loadlin) about how to pass options to the kernel at boot time.)
66
67 If unsure, say Y.
68
69config HW_CONSOLE
70 bool
71 depends on VT && !S390 && !UML
72 default y
73
Antonino A. Daplas13ae6642006-06-26 00:27:12 -070074config VT_HW_CONSOLE_BINDING
75 bool "Support for binding and unbinding console drivers"
76 depends on HW_CONSOLE
77 default n
78 ---help---
79 The virtual terminal is the device that interacts with the physical
80 terminal through console drivers. On these systems, at least one
81 console driver is loaded. In other configurations, additional console
82 drivers may be enabled, such as the framebuffer console. If more than
83 1 console driver is enabled, setting this to 'y' will allow you to
84 select the console driver that will serve as the backend for the
85 virtual terminals.
86
87 See <file:Documentation/console/console.txt> for more
88 information. For framebuffer console users, please refer to
89 <file:Documentation/fb/fbcon.txt>.
90
Arjan van de Venb781ecb2008-04-29 00:58:34 -070091config DEVKMEM
92 bool "/dev/kmem virtual device support"
93 default y
94 help
95 Say Y here if you want to support the /dev/kmem device. The
96 /dev/kmem device is rarely used, but can be used for certain
97 kind of kernel debugging operations.
98 When in doubt, say "N".
99
Mike Frysinger0b914212009-06-11 14:01:45 +0100100config BFIN_JTAG_COMM
101 tristate "Blackfin JTAG Communication"
102 depends on BLACKFIN
103 help
104 Add support for emulating a TTY device over the Blackfin JTAG.
105
106 To compile this driver as a module, choose M here: the
107 module will be called bfin_jtag_comm.
108
109config BFIN_JTAG_COMM_CONSOLE
110 bool "Console on Blackfin JTAG"
111 depends on BFIN_JTAG_COMM=y
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113config SERIAL_NONSTANDARD
114 bool "Non-standard serial port support"
Martin Schwidefskyeeca7a32007-05-10 15:45:56 +0200115 depends on HAS_IOMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 ---help---
117 Say Y here if you have any non-standard serial boards -- boards
118 which aren't supported using the standard "dumb" serial driver.
119 This includes intelligent serial boards such as Cyclades,
120 Digiboards, etc. These are usually used for systems that need many
121 serial ports because they serve many terminals or dial-in
122 connections.
123
124 Note that the answer to this question won't directly affect the
125 kernel: saying N will just cause the configurator to skip all
126 the questions about non-standard serial boards.
127
128 Most people can say N here.
129
130config COMPUTONE
131 tristate "Computone IntelliPort Plus serial support"
Al Viro3b4709a2006-12-13 00:34:58 -0800132 depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 ---help---
134 This driver supports the entire family of Intelliport II/Plus
135 controllers with the exception of the MicroChannel controllers and
136 products previous to the Intelliport II. These are multiport cards,
137 which give you many serial ports. You would need something like this
138 to connect more than two modems to your Linux box, for instance in
139 order to become a dial-in server. If you have a card like that, say
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000140 Y here and read <file:Documentation/serial/computone.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Roland.Kletzing33dda512008-06-05 22:46:04 -0700142 To compile this driver as module, choose M here: the
143 module will be called ip2.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
145config ROCKETPORT
146 tristate "Comtrol RocketPort support"
Al Viro27d41712007-07-17 08:49:35 +0100147 depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 help
149 This driver supports Comtrol RocketPort and RocketModem PCI boards.
150 These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or
151 modems. For information about the RocketPort/RocketModem boards
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000152 and this driver read <file:Documentation/serial/rocket.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154 To compile this driver as a module, choose M here: the
155 module will be called rocket.
156
157 If you want to compile this driver into the kernel, say Y here. If
158 you don't have a Comtrol RocketPort/RocketModem card installed, say N.
159
160config CYCLADES
161 tristate "Cyclades async mux support"
Jiri Slabycff94942007-05-08 00:36:36 -0700162 depends on SERIAL_NONSTANDARD && (PCI || ISA)
Jiri Slabyee2077d2007-07-26 10:41:17 -0700163 select FW_LOADER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 ---help---
165 This driver supports Cyclades Z and Y multiserial boards.
166 You would need something like this to connect more than two modems to
167 your Linux box, for instance in order to become a dial-in server.
168
169 For information about the Cyclades-Z card, read
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000170 <file:Documentation/serial/README.cycladesZ>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
172 To compile this driver as a module, choose M here: the
173 module will be called cyclades.
174
175 If you haven't heard about it, it's safe to say N.
176
177config CYZ_INTR
178 bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)"
179 depends on EXPERIMENTAL && CYCLADES
180 help
181 The Cyclades-Z family of multiport cards allows 2 (two) driver op
182 modes: polling and interrupt. In polling mode, the driver will check
183 the status of the Cyclades-Z ports every certain amount of time
184 (which is called polling cycle and is configurable). In interrupt
185 mode, it will use an interrupt line (IRQ) in order to check the
186 status of the Cyclades-Z ports. The default op mode is polling. If
187 unsure, say N.
188
189config DIGIEPCA
190 tristate "Digiboard Intelligent Async Support"
Alan Coxdcbf1282008-07-22 11:18:12 +0100191 depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 ---help---
193 This is a driver for Digi International's Xx, Xeve, and Xem series
194 of cards which provide multiple serial ports. You would need
195 something like this to connect more than two modems to your Linux
196 box, for instance in order to become a dial-in server. This driver
197 supports the original PC (ISA) boards as well as PCI, and EISA. If
198 you have a card like this, say Y here and read the file
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000199 <file:Documentation/serial/digiepca.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201 To compile this driver as a module, choose M here: the
202 module will be called epca.
203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204config MOXA_INTELLIO
205 tristate "Moxa Intellio support"
Al Viro8a023672007-07-20 00:24:22 +0100206 depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
Jiri Slaby49209162008-05-14 16:05:53 -0700207 select FW_LOADER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 help
209 Say Y here if you have a Moxa Intellio multiport serial card.
210
211 To compile this driver as a module, choose M here: the
212 module will be called moxa.
213
214config MOXA_SMARTIO
Jiri Slaby98c47ea2007-02-10 01:45:15 -0800215 tristate "Moxa SmartIO support v. 2.0"
Jiri Slabyfb0c9292006-12-13 00:34:19 -0800216 depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA)
Jiri Slaby037ad482006-12-08 02:38:11 -0800217 help
218 Say Y here if you have a Moxa SmartIO multiport serial card and/or
219 want to help develop a new version of this driver.
220
221 This is upgraded (1.9.1) driver from original Moxa drivers with
222 changes finally resulting in PCI probing.
223
Jiri Slaby037ad482006-12-08 02:38:11 -0800224 This driver can also be built as a module. The module will be called
Jiri Slaby1c456072008-02-07 00:16:46 -0800225 mxser. If you want to do that, say M here.
Jiri Slaby037ad482006-12-08 02:38:11 -0800226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227config ISI
228 tristate "Multi-Tech multiport card support (EXPERIMENTAL)"
Alan Cox6d889722008-07-22 11:18:21 +0100229 depends on SERIAL_NONSTANDARD && PCI
maximilian attems5ff2a7e2006-03-26 01:37:35 -0800230 select FW_LOADER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 help
232 This is a driver for the Multi-Tech cards which provide several
233 serial ports. The driver is experimental and can currently only be
234 built as a module. The module will be called isicom.
235 If you want to do that, choose M here.
236
237config SYNCLINK
238 tristate "Microgate SyncLink card support"
Al Viroa5532602005-05-04 05:39:42 +0100239 depends on SERIAL_NONSTANDARD && PCI && ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 help
241 Provides support for the SyncLink ISA and PCI multiprotocol serial
242 adapters. These adapters support asynchronous and HDLC bit
243 synchronous communication up to 10Mbps (PCI adapter).
244
245 This driver can only be built as a module ( = code which can be
246 inserted in and removed from the running kernel whenever you want).
247 The module will be called synclink. If you want to do that, say M
248 here.
249
250config SYNCLINKMP
251 tristate "SyncLink Multiport support"
Al Viro8a023672007-07-20 00:24:22 +0100252 depends on SERIAL_NONSTANDARD && PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 help
254 Enable support for the SyncLink Multiport (2 or 4 ports)
255 serial adapter, running asynchronous and HDLC communications up
256 to 2.048Mbps. Each ports is independently selectable for
257 RS-232, V.35, RS-449, RS-530, and X.21
258
259 This driver may be built as a module ( = code which can be
260 inserted in and removed from the running kernel whenever you want).
261 The module will be called synclinkmp. If you want to do that, say M
262 here.
263
Paul Fulghum705b6c72006-01-08 01:02:06 -0800264config SYNCLINK_GT
265 tristate "SyncLink GT/AC support"
Al Viro8ef9cf32006-02-01 06:07:15 -0500266 depends on SERIAL_NONSTANDARD && PCI
Paul Fulghum705b6c72006-01-08 01:02:06 -0800267 help
268 Support for SyncLink GT and SyncLink AC families of
269 synchronous and asynchronous serial adapters
270 manufactured by Microgate Systems, Ltd. (www.microgate.com)
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272config N_HDLC
273 tristate "HDLC line discipline support"
274 depends on SERIAL_NONSTANDARD
275 help
276 Allows synchronous HDLC communications with tty device drivers that
277 support synchronous HDLC such as the Microgate SyncLink adapter.
278
279 This driver can only be built as a module ( = code which can be
280 inserted in and removed from the running kernel whenever you want).
281 The module will be called n_hdlc. If you want to do that, say M
282 here.
283
284config RISCOM8
285 tristate "SDL RISCom/8 card support"
Alan Cox781cff52008-07-22 11:18:30 +0100286 depends on SERIAL_NONSTANDARD
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 help
288 This is a driver for the SDL Communications RISCom/8 multiport card,
289 which gives you many serial ports. You would need something like
290 this to connect more than two modems to your Linux box, for instance
291 in order to become a dial-in server. If you have a card like that,
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000292 say Y here and read the file <file:Documentation/serial/riscom8.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
294 Also it's possible to say M here and compile this driver as kernel
295 loadable module; the module will be called riscom8.
296
297config SPECIALIX
298 tristate "Specialix IO8+ card support"
Alan Coxfaa76122008-07-22 11:19:05 +0100299 depends on SERIAL_NONSTANDARD
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 help
301 This is a driver for the Specialix IO8+ multiport card (both the
302 ISA and the PCI version) which gives you many serial ports. You
303 would need something like this to connect more than two modems to
304 your Linux box, for instance in order to become a dial-in server.
305
306 If you have a card like that, say Y here and read the file
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000307 <file:Documentation/serial/specialix.txt>. Also it's possible to say
308 M here and compile this driver as kernel loadable module which will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 called specialix.
310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311config SX
312 tristate "Specialix SX (and SI) card support"
Alan Cox41214592009-10-29 12:16:22 +0000313 depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA) && BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 help
315 This is a driver for the SX and SI multiport serial cards.
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000316 Please read the file <file:Documentation/serial/sx.txt> for details.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
318 This driver can only be built as a module ( = code which can be
319 inserted in and removed from the running kernel whenever you want).
320 The module will be called sx. If you want to do that, say M here.
321
322config RIO
323 tristate "Specialix RIO system support"
Alan Cox41214592009-10-29 12:16:22 +0000324 depends on SERIAL_NONSTANDARD && BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 help
326 This is a driver for the Specialix RIO, a smart serial card which
327 drives an outboard box that can support up to 128 ports. Product
328 information is at <http://www.perle.com/support/documentation.html#multiport>.
329 There are both ISA and PCI versions.
330
331config RIO_OLDPCI
332 bool "Support really old RIO/PCI cards"
333 depends on RIO
334 help
335 Older RIO PCI cards need some initialization-time configuration to
336 determine the IRQ and some control addresses. If you have a RIO and
337 this doesn't seem to work, try setting this to Y.
338
339config STALDRV
340 bool "Stallion multiport serial support"
341 depends on SERIAL_NONSTANDARD
342 help
343 Stallion cards give you many serial ports. You would need something
344 like this to connect more than two modems to your Linux box, for
345 instance in order to become a dial-in server. If you say Y here,
346 you will be asked for your specific card model in the next
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000347 questions. Make sure to read <file:Documentation/serial/stallion.txt>
348 in this case. If you have never heard about all this, it's safe to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 say N.
350
351config STALLION
352 tristate "Stallion EasyIO or EC8/32 support"
Alan Coxd18a7502008-10-13 10:40:07 +0100353 depends on STALDRV && (ISA || EISA || PCI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 help
355 If you have an EasyIO or EasyConnection 8/32 multiport Stallion
356 card, then this is for you; say Y. Make sure to read
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000357 <file:Documentation/serial/stallion.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
359 To compile this driver as a module, choose M here: the
360 module will be called stallion.
361
362config ISTALLION
363 tristate "Stallion EC8/64, ONboard, Brumby support"
Alan Coxd18a7502008-10-13 10:40:07 +0100364 depends on STALDRV && (ISA || EISA || PCI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 help
366 If you have an EasyConnection 8/64, ONboard, Brumby or Stallion
367 serial multiport card, say Y here. Make sure to read
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000368 <file:Documentation/serial/stallion.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370 To compile this driver as a module, choose M here: the
371 module will be called istallion.
372
Frank Seidel20fd1e32007-11-09 14:49:23 +0100373config NOZOMI
374 tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
375 depends on PCI && EXPERIMENTAL
376 help
377 If you have a HSDPA driver Broadband Wireless Data Card -
378 Globe Trotter PCMCIA card, say Y here.
379
380 To compile this driver as a module, choose M here, the module
381 will be called nozomi.
382
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383config A2232
384 tristate "Commodore A2232 serial support (EXPERIMENTAL)"
Alan Cox41214592009-10-29 12:16:22 +0000385 depends on EXPERIMENTAL && ZORRO && BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 ---help---
387 This option supports the 2232 7-port serial card shipped with the
388 Amiga 2000 and other Zorro-bus machines, dating from 1989. At
389 a max of 19,200 bps, the ports are served by a 6551 ACIA UART chip
390 each, plus a 8520 CIA, and a master 6502 CPU and buffer as well. The
391 ports were connected with 8 pin DIN connectors on the card bracket,
392 for which 8 pin to DB25 adapters were supplied. The card also had
393 jumpers internally to toggle various pinning configurations.
394
395 This driver can be built as a module; but then "generic_serial"
396 will also be built as a module. This has to be loaded before
397 "ser_a2232". If you want to do this, answer M here.
398
399config SGI_SNSC
400 bool "SGI Altix system controller communication support"
401 depends on (IA64_SGI_SN2 || IA64_GENERIC)
402 help
403 If you have an SGI Altix and you want to enable system
404 controller communication from user space (you want this!),
405 say Y. Otherwise, say N.
406
Bruce Losuree1e19742005-04-25 13:09:41 -0700407config SGI_TIOCX
408 bool "SGI TIO CX driver support"
409 depends on (IA64_SGI_SN2 || IA64_GENERIC)
410 help
411 If you have an SGI Altix and you have fpga devices attached
412 to your TIO, say Y here, otherwise say N.
413
414config SGI_MBCS
415 tristate "SGI FPGA Core Services driver support"
Bruce Losureae40aae2005-04-04 13:23:00 -0700416 depends on SGI_TIOCX
Bruce Losuree1e19742005-04-25 13:09:41 -0700417 help
418 If you have an SGI Altix with an attached SABrick
419 say Y or M here, otherwise say N.
420
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421source "drivers/serial/Kconfig"
422
423config UNIX98_PTYS
424 bool "Unix98 PTY support" if EMBEDDED
425 default y
426 ---help---
427 A pseudo terminal (PTY) is a software device consisting of two
428 halves: a master and a slave. The slave device behaves identical to
429 a physical terminal; the master device is used by a process to
430 read data from and write data to the slave, thereby emulating a
431 terminal. Typical programs for the master side are telnet servers
432 and xterms.
433
434 Linux has traditionally used the BSD-like names /dev/ptyxx for
435 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
436 has a number of problems. The GNU C library glibc 2.1 and later,
437 however, supports the Unix98 naming standard: in order to acquire a
438 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
439 terminal is then made available to the process and the pseudo
440 terminal slave can be accessed as /dev/pts/<number>. What was
441 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
442
443 All modern Linux systems use the Unix98 ptys. Say Y unless
444 you're on an embedded system and want to conserve memory.
445
Sukadev Bhattiprolue4adca22009-01-02 13:41:54 +0000446config DEVPTS_MULTIPLE_INSTANCES
447 bool "Support multiple instances of devpts"
448 depends on UNIX98_PTYS
449 default n
450 ---help---
451 Enable support for multiple instances of devpts filesystem.
452 If you want to have isolated PTY namespaces (eg: in containers),
453 say Y here. Otherwise, say N. If enabled, each mount of devpts
454 filesystem with the '-o newinstance' option will create an
455 independent PTY namespace.
456
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457config LEGACY_PTYS
458 bool "Legacy (BSD) PTY support"
459 default y
460 ---help---
461 A pseudo terminal (PTY) is a software device consisting of two
462 halves: a master and a slave. The slave device behaves identical to
463 a physical terminal; the master device is used by a process to
464 read data from and write data to the slave, thereby emulating a
465 terminal. Typical programs for the master side are telnet servers
466 and xterms.
467
468 Linux has traditionally used the BSD-like names /dev/ptyxx
469 for masters and /dev/ttyxx for slaves of pseudo
470 terminals. This scheme has a number of problems, including
471 security. This option enables these legacy devices; on most
472 systems, it is safe to say N.
473
474
475config LEGACY_PTY_COUNT
476 int "Maximum number of legacy PTY in use"
477 depends on LEGACY_PTYS
Kay Sievers345ee832007-11-14 23:39:42 +0100478 range 0 256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 default "256"
480 ---help---
481 The maximum number of legacy PTYs that can be used at any one time.
482 The default is 256, and should be more than enough. Embedded
483 systems may want to reduce this to save memory.
484
485 When not in use, each legacy PTY occupies 12 bytes on 32-bit
486 architectures and 24 bytes on 64-bit architectures.
487
Benjamin Herrenschmidta45b8392006-07-04 15:06:20 +1000488config BRIQ_PANEL
489 tristate 'Total Impact briQ front panel driver'
Paul Mackerras2818c5d2006-08-25 15:08:21 +1000490 depends on PPC_CHRP
Benjamin Herrenschmidta45b8392006-07-04 15:06:20 +1000491 ---help---
492 The briQ is a small footprint CHRP computer with a frontpanel VFD, a
493 tristate led and two switches. It is the size of a CDROM drive.
494
495 If you have such one and want anything showing on the VFD then you
496 must answer Y here.
497
498 To compile this driver as a module, choose M here: the
499 module will be called briq_panel.
500
501 It's safe to say N here.
502
Mike Frysinger2dc63a82008-04-25 08:04:56 +0800503config BFIN_OTP
504 tristate "Blackfin On-Chip OTP Memory Support"
Mike Frysingerf69b2d72009-11-20 19:09:56 +0000505 depends on BLACKFIN && (BF51x || BF52x || BF54x)
Mike Frysinger2dc63a82008-04-25 08:04:56 +0800506 default y
507 help
508 If you say Y here, you will get support for a character device
509 interface into the One Time Programmable memory pages that are
510 stored on the Blackfin processor. This will not get you access
511 to the secure memory pages however. You will need to write your
512 own secure code and reader for that.
513
514 To compile this driver as a module, choose M here: the module
515 will be called bfin-otp.
516
517 If unsure, it is safe to say Y.
518
519config BFIN_OTP_WRITE_ENABLE
520 bool "Enable writing support of OTP pages"
521 depends on BFIN_OTP
522 default n
523 help
524 If you say Y here, you will enable support for writing of the
525 OTP pages. This is dangerous by nature as you can only program
526 the pages once, so only enable this option when you actually
527 need it so as to not inadvertently clobber data.
528
529 If unsure, say N.
530
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531config PRINTER
532 tristate "Parallel printer support"
533 depends on PARPORT
534 ---help---
535 If you intend to attach a printer to the parallel port of your Linux
536 box (as opposed to using a serial printer; if the connector at the
537 printer has 9 or 25 holes ["female"], then it's serial), say Y.
538 Also read the Printing-HOWTO, available from
539 <http://www.tldp.org/docs.html#howto>.
540
541 It is possible to share one parallel port among several devices
542 (e.g. printer and ZIP drive) and it is safe to compile the
543 corresponding drivers into the kernel.
544
545 To compile this driver as a module, choose M here and read
546 <file:Documentation/parport.txt>. The module will be called lp.
547
548 If you have several parallel ports, you can specify which ports to
549 use with the "lp" kernel command line option. (Try "man bootparam"
550 or see the documentation of your boot loader (lilo or loadlin) about
551 how to pass options to the kernel at boot time.) The syntax of the
552 "lp" command line option can be found in <file:drivers/char/lp.c>.
553
554 If you have more than 8 printers, you need to increase the LP_NO
555 macro in lp.c and the PARPORT_MAX macro in parport.h.
556
557config LP_CONSOLE
558 bool "Support for console on line printer"
559 depends on PRINTER
560 ---help---
561 If you want kernel messages to be printed out as they occur, you
562 can have a console on the printer. This option adds support for
563 doing that; to actually get it to happen you need to pass the
564 option "console=lp0" to the kernel at boot time.
565
566 If the printer is out of paper (or off, or unplugged, or too
567 busy..) the kernel will stall until the printer is ready again.
568 By defining CONSOLE_LP_STRICT to 0 (at your own risk) you
569 can make the kernel continue when this happens,
570 but it'll lose the kernel messages.
571
572 If unsure, say N.
573
574config PPDEV
575 tristate "Support for user-space parallel port device drivers"
576 depends on PARPORT
577 ---help---
578 Saying Y to this adds support for /dev/parport device nodes. This
579 is needed for programs that want portable access to the parallel
580 port, for instance deviceid (which displays Plug-and-Play device
581 IDs).
582
583 This is the parallel port equivalent of SCSI generic support (sg).
584 It is safe to say N to this -- it is not needed for normal printing
585 or parallel port CD-ROM/disk support.
586
587 To compile this driver as a module, choose M here: the
588 module will be called ppdev.
589
590 If unsure, say N.
591
Ryan S. Arnold45d607e2006-03-27 21:25:16 +0200592config HVC_DRIVER
593 bool
594 help
Rusty Russell3e6c6f62007-10-16 23:30:13 -0700595 Generic "hypervisor virtual console" infrastructure for various
Rusty Russell2d1df812007-10-16 23:30:14 -0700596 hypervisors (pSeries, iSeries, Xen, lguest).
Ryan S. Arnold45d607e2006-03-27 21:25:16 +0200597 It will automatically be selected if one of the back-end console drivers
598 is selected.
599
Christian Borntraeger611e0972008-06-20 15:24:08 +0200600config HVC_IRQ
601 bool
Ryan S. Arnold45d607e2006-03-27 21:25:16 +0200602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603config HVC_CONSOLE
604 bool "pSeries Hypervisor Virtual Console support"
605 depends on PPC_PSERIES
Ryan S. Arnold45d607e2006-03-27 21:25:16 +0200606 select HVC_DRIVER
Christian Borntraeger611e0972008-06-20 15:24:08 +0200607 select HVC_IRQ
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 help
609 pSeries machines when partitioned support a hypervisor virtual
610 console. This driver allows each pSeries partition to have a console
611 which is accessed via the HMC.
612
Stephen Rothwell8bff05b2006-07-13 18:51:22 +1000613config HVC_ISERIES
614 bool "iSeries Hypervisor Virtual Console support"
Stephen Rothwellb15f7922007-05-08 15:05:31 +1000615 depends on PPC_ISERIES
616 default y
Stephen Rothwell8bff05b2006-07-13 18:51:22 +1000617 select HVC_DRIVER
Christian Borntraeger611e0972008-06-20 15:24:08 +0200618 select HVC_IRQ
Kamalesh Babulald2b43972009-01-06 05:57:24 +0000619 select VIOPATH
Stephen Rothwell8bff05b2006-07-13 18:51:22 +1000620 help
621 iSeries machines support a hypervisor virtual console.
622
Arnd Bergmannf4d17492006-03-27 21:26:03 +0200623config HVC_RTAS
624 bool "IBM RTAS Console support"
625 depends on PPC_RTAS
626 select HVC_DRIVER
627 help
628 IBM Console device driver which makes use of RTAS
629
Ishizaki Kou3cdc20e2007-02-02 16:44:08 +0900630config HVC_BEAT
631 bool "Toshiba's Beat Hypervisor Console support"
632 depends on PPC_CELLEB
633 select HVC_DRIVER
634 help
635 Toshiba's Cell Reference Set Beat Console device driver
636
Hendrik Brueckner44a01d52008-12-25 13:38:57 +0100637config HVC_IUCV
638 bool "z/VM IUCV Hypervisor console support (VM only)"
639 depends on S390
640 select HVC_DRIVER
641 select IUCV
642 default y
643 help
644 This driver provides a Hypervisor console (HVC) back-end to access
645 a Linux (console) terminal via a z/VM IUCV communication path.
646
Jeremy Fitzhardingeb536b4b2007-07-17 18:37:06 -0700647config HVC_XEN
648 bool "Xen Hypervisor Console support"
649 depends on XEN
650 select HVC_DRIVER
Christian Borntraeger611e0972008-06-20 15:24:08 +0200651 select HVC_IRQ
Jeremy Fitzhardingeb536b4b2007-07-17 18:37:06 -0700652 default y
653 help
654 Xen virtual console device driver
655
David Gibsond5e54912008-11-05 14:20:17 +0000656config HVC_UDBG
657 bool "udbg based fake hypervisor console"
658 depends on PPC && EXPERIMENTAL
659 select HVC_DRIVER
660 default n
661
Rusty Russell31610432007-10-22 11:03:39 +1000662config VIRTIO_CONSOLE
Christian Borntraeger7721c492008-07-25 12:06:06 -0500663 tristate "Virtio console"
664 depends on VIRTIO
Rusty Russell31610432007-10-22 11:03:39 +1000665 select HVC_DRIVER
Christian Borntraeger7721c492008-07-25 12:06:06 -0500666 help
667 Virtio console for use with lguest and other hypervisors.
668
Rusty Russell31610432007-10-22 11:03:39 +1000669
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670config HVCS
671 tristate "IBM Hypervisor Virtual Console Server support"
672 depends on PPC_PSERIES
673 help
674 Partitionable IBM Power5 ppc64 machines allow hosting of
675 firmware virtual consoles from one Linux partition by
676 another Linux partition. This driver allows console data
677 from Linux partitions to be accessed through TTY device
678 interfaces in the device tree of a Linux partition running
679 this driver.
680
681 To compile this driver as a module, choose M here: the
Pavel Machek4737f092009-06-05 00:44:53 +0200682 module will be called hvcs. Additionally, this module
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 will depend on arch specific APIs exported from hvcserver.ko
684 which will also be compiled when this driver is built as a
685 module.
686
Sonny Raofe9e8d52008-07-08 15:45:11 +1000687config IBM_BSR
688 tristate "IBM POWER Barrier Synchronization Register support"
689 depends on PPC_PSERIES
690 help
691 This devices exposes a hardware mechanism for fast synchronization
692 of threads across a large system which avoids bouncing a cacheline
693 between several cores on a system
694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695source "drivers/char/ipmi/Kconfig"
696
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697config DS1620
698 tristate "NetWinder thermometer support"
699 depends on ARCH_NETWINDER
700 help
701 Say Y here to include support for the thermal management hardware
702 found in the NetWinder. This driver allows the user to control the
703 temperature set points and to read the current temperature.
704
705 It is also possible to say M here to build it as a module (ds1620)
706 It is recommended to be used on a NetWinder, but it is not a
707 necessity.
708
709config NWBUTTON
710 tristate "NetWinder Button"
711 depends on ARCH_NETWINDER
712 ---help---
713 If you say Y here and create a character device node /dev/nwbutton
714 with major and minor numbers 10 and 158 ("man mknod"), then every
715 time the orange button is pressed a number of times, the number of
716 times the button was pressed will be written to that device.
717
718 This is most useful for applications, as yet unwritten, which
719 perform actions based on how many times the button is pressed in a
720 row.
721
722 Do not hold the button down for too long, as the driver does not
723 alter the behaviour of the hardware reset circuitry attached to the
724 button; it will still execute a hard reset if the button is held
725 down for longer than approximately five seconds.
726
727 To compile this driver as a module, choose M here: the
728 module will be called nwbutton.
729
730 Most people will answer Y to this question and "Reboot Using Button"
731 below to be able to initiate a system shutdown from the button.
732
733config NWBUTTON_REBOOT
734 bool "Reboot Using Button"
735 depends on NWBUTTON
736 help
737 If you say Y here, then you will be able to initiate a system
738 shutdown and reboot by pressing the orange button a number of times.
739 The number of presses to initiate the shutdown is two by default,
740 but this can be altered by modifying the value of NUM_PRESSES_REBOOT
741 in nwbutton.h and recompiling the driver or, if you compile the
742 driver as a module, you can specify the number of presses at load
743 time with "insmod button reboot_count=<something>".
744
745config NWFLASH
746 tristate "NetWinder flash support"
747 depends on ARCH_NETWINDER
748 ---help---
749 If you say Y here and create a character device /dev/flash with
750 major 10 and minor 160 you can manipulate the flash ROM containing
751 the NetWinder firmware. Be careful as accidentally overwriting the
752 flash contents can render your computer unbootable. On no account
753 allow random users access to this device. :-)
754
755 To compile this driver as a module, choose M here: the
756 module will be called nwflash.
757
758 If you're not sure, say N.
759
Michael Buesch844dd052006-06-26 00:24:59 -0700760source "drivers/char/hw_random/Kconfig"
761
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762config NVRAM
763 tristate "/dev/nvram support"
Uwe Kleine-König807a96c2009-01-31 01:21:59 +0100764 depends on ATARI || X86 || (ARM && RTC_DRV_CMOS) || GENERIC_NVRAM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 ---help---
766 If you say Y here and create a character special file /dev/nvram
767 with major number 10 and minor number 144 using mknod ("man mknod"),
768 you get read and write access to the extra bytes of non-volatile
769 memory in the real time clock (RTC), which is contained in every PC
770 and most Ataris. The actual number of bytes varies, depending on the
771 nvram in the system, but is usually 114 (128-14 for the RTC).
772
773 This memory is conventionally called "CMOS RAM" on PCs and "NVRAM"
774 on Ataris. /dev/nvram may be used to view settings there, or to
775 change them (with some utility). It could also be used to frequently
776 save a few bits of very important data that may not be lost over
777 power-off and for which writing to disk is too insecure. Note
778 however that most NVRAM space in a PC belongs to the BIOS and you
779 should NEVER idly tamper with it. See Ralf Brown's interrupt list
780 for a guide to the use of CMOS bytes by your BIOS.
781
782 On Atari machines, /dev/nvram is always configured and does not need
783 to be selected.
784
785 To compile this driver as a module, choose M here: the
786 module will be called nvram.
787
David Brownellc7500902008-04-28 02:11:52 -0700788#
789# These legacy RTC drivers just cause too many conflicts with the generic
790# RTC framework ... let's not even try to coexist any more.
791#
792if RTC_LIB=n
793
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794config RTC
David Brownelle6d2bb22008-06-12 15:21:55 -0700795 tristate "Enhanced Real Time Clock Support (legacy PC RTC driver)"
David Brownellc7500902008-04-28 02:11:52 -0700796 depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV \
Mike Frysinger7bfa58d2009-06-17 16:26:14 -0700797 && !ARM && !SUPERH && !S390 && !AVR32 && !BLACKFIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 ---help---
799 If you say Y here and create a character special file /dev/rtc with
800 major number 10 and minor number 135 using mknod ("man mknod"), you
801 will get access to the real time clock (or hardware clock) built
802 into your computer.
803
804 Every PC has such a clock built in. It can be used to generate
805 signals from as low as 1Hz up to 8192Hz, and can also be used
806 as a 24 hour alarm. It reports status information via the file
807 /proc/driver/rtc and its behaviour is set by various ioctls on
808 /dev/rtc.
809
810 If you run Linux on a multiprocessor machine and said Y to
811 "Symmetric Multi Processing" above, you should say Y here to read
812 and set the RTC in an SMP compatible fashion.
813
814 If you think you have a use for such a device (such as periodic data
815 sampling), then say Y here, and read <file:Documentation/rtc.txt>
816 for details.
817
818 To compile this driver as a module, choose M here: the
819 module will be called rtc.
820
Al Viro22405982007-07-22 00:37:48 -0700821config JS_RTC
822 tristate "Enhanced Real Time Clock Support"
823 depends on SPARC32 && PCI
824 ---help---
825 If you say Y here and create a character special file /dev/rtc with
826 major number 10 and minor number 135 using mknod ("man mknod"), you
827 will get access to the real time clock (or hardware clock) built
828 into your computer.
829
830 Every PC has such a clock built in. It can be used to generate
831 signals from as low as 1Hz up to 8192Hz, and can also be used
832 as a 24 hour alarm. It reports status information via the file
833 /proc/driver/rtc and its behaviour is set by various ioctls on
834 /dev/rtc.
835
836 If you think you have a use for such a device (such as periodic data
837 sampling), then say Y here, and read <file:Documentation/rtc.txt>
838 for details.
839
840 To compile this driver as a module, choose M here: the
841 module will be called js-rtc.
842
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843config GEN_RTC
844 tristate "Generic /dev/rtc emulation"
Mike Frysinger103d6d92009-01-06 14:42:10 -0800845 depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32 && !BLACKFIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 ---help---
847 If you say Y here and create a character special file /dev/rtc with
848 major number 10 and minor number 135 using mknod ("man mknod"), you
849 will get access to the real time clock (or hardware clock) built
850 into your computer.
851
852 It reports status information via the file /proc/driver/rtc and its
853 behaviour is set by various ioctls on /dev/rtc. If you enable the
854 "extended RTC operation" below it will also provide an emulation
855 for RTC_UIE which is required by some programs and may improve
856 precision in some cases.
857
858 To compile this driver as a module, choose M here: the
859 module will be called genrtc.
860
861config GEN_RTC_X
862 bool "Extended RTC operation"
863 depends on GEN_RTC
864 help
865 Provides an emulation for RTC_UIE which is required by some programs
866 and may improve precision of the generic RTC support in some cases.
867
868config EFI_RTC
869 bool "EFI Real Time Clock Services"
870 depends on IA64
871
872config DS1302
873 tristate "DS1302 RTC support"
874 depends on M32R && (PLAT_M32700UT || PLAT_OPSPUT)
875 help
876 If you say Y here and create a character special file /dev/rtc with
877 major number 121 and minor number 0 using mknod ("man mknod"), you
878 will get access to the real time clock (or hardware clock) built
879 into your computer.
880
David Brownellc7500902008-04-28 02:11:52 -0700881endif # RTC_LIB
882
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883config DTLK
884 tristate "Double Talk PC internal speech card support"
Martin Schwidefskyeeca7a32007-05-10 15:45:56 +0200885 depends on ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 help
887 This driver is for the DoubleTalk PC, a speech synthesizer
888 manufactured by RC Systems (<http://www.rcsys.com/>). It is also
889 called the `internal DoubleTalk'.
890
891 To compile this driver as a module, choose M here: the
892 module will be called dtlk.
893
Stephen Neuendorfferef141a02008-02-06 04:24:09 +1100894config XILINX_HWICAP
895 tristate "Xilinx HWICAP Support"
Michal Simek6fa612b2009-05-11 15:49:12 +0200896 depends on XILINX_VIRTEX || MICROBLAZE
Stephen Neuendorfferef141a02008-02-06 04:24:09 +1100897 help
898 This option enables support for Xilinx Internal Configuration
899 Access Port (ICAP) driver. The ICAP is used on Xilinx Virtex
900 FPGA platforms to partially reconfigure the FPGA at runtime.
901
902 If unsure, say N.
903
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904config R3964
905 tristate "Siemens R3964 line discipline"
906 ---help---
907 This driver allows synchronous communication with devices using the
908 Siemens R3964 packet protocol. Unless you are dealing with special
909 hardware like PLCs, you are unlikely to need this.
910
911 To compile this driver as a module, choose M here: the
912 module will be called n_r3964.
913
914 If unsure, say N.
915
916config APPLICOM
917 tristate "Applicom intelligent fieldbus card support"
918 depends on PCI
919 ---help---
920 This driver provides the kernel-side support for the intelligent
921 fieldbus cards made by Applicom International. More information
922 about these cards can be found on the WWW at the address
923 <http://www.applicom-int.com/>, or by email from David Woodhouse
924 <dwmw2@infradead.org>.
925
926 To compile this driver as a module, choose M here: the
927 module will be called applicom.
928
929 If unsure, say N.
930
931config SONYPI
932 tristate "Sony Vaio Programmable I/O Control Device support (EXPERIMENTAL)"
933 depends on EXPERIMENTAL && X86 && PCI && INPUT && !64BIT
934 ---help---
935 This driver enables access to the Sony Programmable I/O Control
936 Device which can be found in many (all ?) Sony Vaio laptops.
937
938 If you have one of those laptops, read
Carlos Corbacho018a6512008-02-09 01:32:19 +0000939 <file:Documentation/laptops/sonypi.txt>, and say Y or M here.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
941 To compile this driver as a module, choose M here: the
942 module will be called sonypi.
943
Yoichi Yuasa09762512007-05-06 14:51:58 -0700944config GPIO_TB0219
945 tristate "TANBAC TB0219 GPIO support"
Robert P. J. Daybef1f402006-12-12 20:04:19 +0100946 depends on TANBAC_TB022X
Yoichi Yuasa584e1232006-06-25 05:49:11 -0700947 select GPIO_VR41XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949source "drivers/char/pcmcia/Kconfig"
950
951config MWAVE
952 tristate "ACP Modem (Mwave) support"
953 depends on X86
954 select SERIAL_8250
955 ---help---
956 The ACP modem (Mwave) for Linux is a WinModem. It is composed of a
957 kernel driver and a user level application. Together these components
958 support direct attachment to public switched telephone networks (PSTNs)
959 and support selected world wide countries.
960
961 This version of the ACP Modem driver supports the IBM Thinkpad 600E,
962 600, and 770 that include on board ACP modem hardware.
963
964 The modem also supports the standard communications port interface
965 (ttySx) and is compatible with the Hayes AT Command Set.
966
967 The user level application needed to use this driver can be found at
968 the IBM Linux Technology Center (LTC) web site:
969 <http://www.ibm.com/linux/ltc/>.
970
971 If you own one of the above IBM Thinkpads which has the Mwave chipset
972 in it, say Y.
973
974 To compile this driver as a module, choose M here: the
975 module will be called mwave.
976
977config SCx200_GPIO
978 tristate "NatSemi SCx200 GPIO Support"
979 depends on SCx200
Jim Cromie7a8e2a52006-06-27 02:54:27 -0700980 select NSC_GPIO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 help
982 Give userspace access to the GPIO pins on the National
983 Semiconductor SCx200 processors.
984
985 If compiled as a module, it will be called scx200_gpio.
986
Jim Cromie7a8e2a52006-06-27 02:54:27 -0700987config PC8736x_GPIO
988 tristate "NatSemi PC8736x GPIO Support"
989 depends on X86
990 default SCx200_GPIO # mostly N
991 select NSC_GPIO # needed for support routines
992 help
993 Give userspace access to the GPIO pins on the National
994 Semiconductor PC-8736x (x=[03456]) SuperIO chip. The chip
995 has multiple functional units, inc several managed by
996 hwmon/pc87360 driver. Tested with PC-87366
997
998 If compiled as a module, it will be called pc8736x_gpio.
999
1000config NSC_GPIO
1001 tristate "NatSemi Base GPIO Support"
Dave Jones699352c2006-06-29 02:24:32 -07001002 depends on X86_32
Jim Cromie7a8e2a52006-06-27 02:54:27 -07001003 # selected by SCx200_GPIO and PC8736x_GPIO
1004 # what about 2 selectors differing: m != y
1005 help
1006 Common support used (and needed) by scx200_gpio and
1007 pc8736x_gpio drivers. If those drivers are built as
1008 modules, this one will be too, named nsc_gpio
1009
Ben Gardnere3291132006-01-09 20:51:29 -08001010config CS5535_GPIO
1011 tristate "AMD CS5535/CS5536 GPIO (Geode Companion Device)"
1012 depends on X86_32
1013 help
1014 Give userspace access to the GPIO pins on the AMD CS5535 and
1015 CS5536 Geode companion devices.
1016
1017 If compiled as a module, it will be called cs5535_gpio.
1018
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019config RAW_DRIVER
Dave Jonesabd4aa52007-07-15 23:40:49 -07001020 tristate "RAW driver (/dev/raw/rawN)"
David Howells93614012006-09-30 20:45:40 +02001021 depends on BLOCK
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 help
Dave Jonesabd4aa52007-07-15 23:40:49 -07001023 The raw driver permits block devices to be bound to /dev/raw/rawN.
1024 Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 See the raw(8) manpage for more details.
1026
Dave Jonesabd4aa52007-07-15 23:40:49 -07001027 Applications should preferably open the device (eg /dev/hda1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 with the O_DIRECT flag.
1029
Andrew Morton0de502a2005-12-12 00:37:41 -08001030config MAX_RAW_DEVS
1031 int "Maximum number of RAW devices to support (1-8192)"
1032 depends on RAW_DRIVER
1033 default "256"
1034 help
1035 The maximum number of RAW devices that are supported.
1036 Default is 256. Increase this number in case you need lots of
1037 raw devices.
1038
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039config HPET
1040 bool "HPET - High Precision Event Timer" if (X86 || IA64)
1041 default n
1042 depends on ACPI
1043 help
1044 If you say Y here, you will have a miscdevice named "/dev/hpet/". Each
1045 open selects one of the timers supported by the HPET. The timers are
Matt LaPlante3cb2fcc2006-11-30 05:22:59 +01001046 non-periodic and/or periodic.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048config HPET_MMAP
1049 bool "Allow mmap of HPET"
1050 default y
1051 depends on HPET
1052 help
1053 If you say Y here, user applications will be able to mmap
1054 the HPET registers.
1055
1056 In some hardware implementations, the page containing HPET
1057 registers may also contain other things that shouldn't be
1058 exposed to the user. If this applies to your hardware,
1059 say N here.
1060
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061config HANGCHECK_TIMER
1062 tristate "Hangcheck timer"
Martin Schwidefskyabf3ea12007-05-10 15:45:59 +02001063 depends on X86 || IA64 || PPC64 || S390
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 help
1065 The hangcheck-timer module detects when the system has gone
1066 out to lunch past a certain margin. It can reboot the system
1067 or merely print a warning.
1068
1069config MMTIMER
1070 tristate "MMTIMER Memory mapped RTC for SGI Altix"
1071 depends on IA64_GENERIC || IA64_SGI_SN2
1072 default y
1073 help
1074 The mmtimer device allows direct userspace access to the
1075 Altix system timer.
1076
Dimitri Sivanichfbd8ae12009-09-23 15:57:15 -07001077config UV_MMTIMER
1078 tristate "UV_MMTIMER Memory mapped RTC for SGI UV"
1079 depends on X86_UV
1080 default m
1081 help
1082 The uv_mmtimer device allows direct userspace access to the
1083 UV system timer.
1084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085source "drivers/char/tpm/Kconfig"
1086
Mark Gross1a80ba82005-10-30 15:02:55 -08001087config TELCLOCK
Mark Gross03154a22007-03-06 13:58:45 -08001088 tristate "Telecom clock driver for ATCA SBC"
Geert Uytterhoeven4d99bfa2006-10-16 19:59:43 +02001089 depends on EXPERIMENTAL && X86
Mark Gross1a80ba82005-10-30 15:02:55 -08001090 default n
1091 help
Mark Gross03154a22007-03-06 13:58:45 -08001092 The telecom clock device is specific to the MPCBL0010 and MPCBL0050
1093 ATCA computers and allows direct userspace access to the
1094 configuration of the telecom clock configuration settings. This
1095 device is used for hardware synchronization across the ATCA backplane
1096 fabric. Upon loading, the driver exports a sysfs directory,
1097 /sys/devices/platform/telco_clock, with a number of files for
1098 controlling the behavior of this hardware.
Mark Gross1a80ba82005-10-30 15:02:55 -08001099
Russell King4f911d62007-05-08 00:28:17 -07001100config DEVPORT
1101 bool
1102 depends on !M68K
1103 depends on ISA || PCI
1104 default y
1105
Martin Schwidefsky61d48c22007-05-10 15:46:00 +02001106source "drivers/s390/char/Kconfig"
1107
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108endmenu
1109