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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
Alan Coxe1eaea42010-03-26 11:32:54 +0000279 This driver can be built as a module ( = code which can be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 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
Alan Coxe1eaea42010-03-26 11:32:54 +0000284config N_GSM
285 tristate "GSM MUX line discipline support (EXPERIMENTAL)"
286 depends on EXPERIMENTAL
Randy Dunlap972c1962010-05-03 09:08:38 -0700287 depends on NET
Alan Coxe1eaea42010-03-26 11:32:54 +0000288 help
289 This line discipline provides support for the GSM MUX protocol and
290 presents the mux as a set of 61 individual tty devices.
291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292config RISCOM8
293 tristate "SDL RISCom/8 card support"
Alan Cox781cff52008-07-22 11:18:30 +0100294 depends on SERIAL_NONSTANDARD
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 help
296 This is a driver for the SDL Communications RISCom/8 multiport card,
297 which gives you many serial ports. You would need something like
298 this to connect more than two modems to your Linux box, for instance
299 in order to become a dial-in server. If you have a card like that,
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000300 say Y here and read the file <file:Documentation/serial/riscom8.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
302 Also it's possible to say M here and compile this driver as kernel
303 loadable module; the module will be called riscom8.
304
305config SPECIALIX
306 tristate "Specialix IO8+ card support"
Alan Coxfaa76122008-07-22 11:19:05 +0100307 depends on SERIAL_NONSTANDARD
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 help
309 This is a driver for the Specialix IO8+ multiport card (both the
310 ISA and the PCI version) which gives you many serial ports. You
311 would need something like this to connect more than two modems to
312 your Linux box, for instance in order to become a dial-in server.
313
314 If you have a card like that, say Y here and read the file
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000315 <file:Documentation/serial/specialix.txt>. Also it's possible to say
316 M here and compile this driver as kernel loadable module which will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 called specialix.
318
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319config SX
320 tristate "Specialix SX (and SI) card support"
Alan Cox41214592009-10-29 12:16:22 +0000321 depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA) && BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 help
323 This is a driver for the SX and SI multiport serial cards.
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000324 Please read the file <file:Documentation/serial/sx.txt> for details.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326 This driver can only be built as a module ( = code which can be
327 inserted in and removed from the running kernel whenever you want).
328 The module will be called sx. If you want to do that, say M here.
329
330config RIO
331 tristate "Specialix RIO system support"
Alan Cox41214592009-10-29 12:16:22 +0000332 depends on SERIAL_NONSTANDARD && BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 help
334 This is a driver for the Specialix RIO, a smart serial card which
335 drives an outboard box that can support up to 128 ports. Product
336 information is at <http://www.perle.com/support/documentation.html#multiport>.
337 There are both ISA and PCI versions.
338
339config RIO_OLDPCI
340 bool "Support really old RIO/PCI cards"
341 depends on RIO
342 help
343 Older RIO PCI cards need some initialization-time configuration to
344 determine the IRQ and some control addresses. If you have a RIO and
345 this doesn't seem to work, try setting this to Y.
346
347config STALDRV
348 bool "Stallion multiport serial support"
349 depends on SERIAL_NONSTANDARD
350 help
351 Stallion cards give you many serial ports. You would need something
352 like this to connect more than two modems to your Linux box, for
353 instance in order to become a dial-in server. If you say Y here,
354 you will be asked for your specific card model in the next
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000355 questions. Make sure to read <file:Documentation/serial/stallion.txt>
356 in this case. If you have never heard about all this, it's safe to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 say N.
358
359config STALLION
360 tristate "Stallion EasyIO or EC8/32 support"
Alan Coxd18a7502008-10-13 10:40:07 +0100361 depends on STALDRV && (ISA || EISA || PCI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 help
363 If you have an EasyIO or EasyConnection 8/32 multiport Stallion
364 card, then this is for you; say Y. Make sure to read
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000365 <file:Documentation/serial/stallion.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367 To compile this driver as a module, choose M here: the
368 module will be called stallion.
369
370config ISTALLION
371 tristate "Stallion EC8/64, ONboard, Brumby support"
Alan Coxd18a7502008-10-13 10:40:07 +0100372 depends on STALDRV && (ISA || EISA || PCI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 help
374 If you have an EasyConnection 8/64, ONboard, Brumby or Stallion
375 serial multiport card, say Y here. Make sure to read
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000376 <file:Documentation/serial/stallion.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378 To compile this driver as a module, choose M here: the
379 module will be called istallion.
380
Frank Seidel20fd1e32007-11-09 14:49:23 +0100381config NOZOMI
382 tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
383 depends on PCI && EXPERIMENTAL
384 help
385 If you have a HSDPA driver Broadband Wireless Data Card -
386 Globe Trotter PCMCIA card, say Y here.
387
388 To compile this driver as a module, choose M here, the module
389 will be called nozomi.
390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391config A2232
392 tristate "Commodore A2232 serial support (EXPERIMENTAL)"
Alan Cox41214592009-10-29 12:16:22 +0000393 depends on EXPERIMENTAL && ZORRO && BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 ---help---
395 This option supports the 2232 7-port serial card shipped with the
396 Amiga 2000 and other Zorro-bus machines, dating from 1989. At
397 a max of 19,200 bps, the ports are served by a 6551 ACIA UART chip
398 each, plus a 8520 CIA, and a master 6502 CPU and buffer as well. The
399 ports were connected with 8 pin DIN connectors on the card bracket,
400 for which 8 pin to DB25 adapters were supplied. The card also had
401 jumpers internally to toggle various pinning configurations.
402
403 This driver can be built as a module; but then "generic_serial"
404 will also be built as a module. This has to be loaded before
405 "ser_a2232". If you want to do this, answer M here.
406
407config SGI_SNSC
408 bool "SGI Altix system controller communication support"
409 depends on (IA64_SGI_SN2 || IA64_GENERIC)
410 help
411 If you have an SGI Altix and you want to enable system
412 controller communication from user space (you want this!),
413 say Y. Otherwise, say N.
414
Bruce Losuree1e19742005-04-25 13:09:41 -0700415config SGI_TIOCX
416 bool "SGI TIO CX driver support"
417 depends on (IA64_SGI_SN2 || IA64_GENERIC)
418 help
419 If you have an SGI Altix and you have fpga devices attached
420 to your TIO, say Y here, otherwise say N.
421
422config SGI_MBCS
423 tristate "SGI FPGA Core Services driver support"
Bruce Losureae40aae2005-04-04 13:23:00 -0700424 depends on SGI_TIOCX
Bruce Losuree1e19742005-04-25 13:09:41 -0700425 help
426 If you have an SGI Altix with an attached SABrick
427 say Y or M here, otherwise say N.
428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429source "drivers/serial/Kconfig"
430
431config UNIX98_PTYS
432 bool "Unix98 PTY support" if EMBEDDED
433 default y
434 ---help---
435 A pseudo terminal (PTY) is a software device consisting of two
436 halves: a master and a slave. The slave device behaves identical to
437 a physical terminal; the master device is used by a process to
438 read data from and write data to the slave, thereby emulating a
439 terminal. Typical programs for the master side are telnet servers
440 and xterms.
441
442 Linux has traditionally used the BSD-like names /dev/ptyxx for
443 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
444 has a number of problems. The GNU C library glibc 2.1 and later,
445 however, supports the Unix98 naming standard: in order to acquire a
446 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
447 terminal is then made available to the process and the pseudo
448 terminal slave can be accessed as /dev/pts/<number>. What was
449 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
450
451 All modern Linux systems use the Unix98 ptys. Say Y unless
452 you're on an embedded system and want to conserve memory.
453
Sukadev Bhattiprolue4adca22009-01-02 13:41:54 +0000454config DEVPTS_MULTIPLE_INSTANCES
455 bool "Support multiple instances of devpts"
456 depends on UNIX98_PTYS
457 default n
458 ---help---
459 Enable support for multiple instances of devpts filesystem.
460 If you want to have isolated PTY namespaces (eg: in containers),
461 say Y here. Otherwise, say N. If enabled, each mount of devpts
462 filesystem with the '-o newinstance' option will create an
463 independent PTY namespace.
464
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465config LEGACY_PTYS
466 bool "Legacy (BSD) PTY support"
467 default y
468 ---help---
469 A pseudo terminal (PTY) is a software device consisting of two
470 halves: a master and a slave. The slave device behaves identical to
471 a physical terminal; the master device is used by a process to
472 read data from and write data to the slave, thereby emulating a
473 terminal. Typical programs for the master side are telnet servers
474 and xterms.
475
476 Linux has traditionally used the BSD-like names /dev/ptyxx
477 for masters and /dev/ttyxx for slaves of pseudo
478 terminals. This scheme has a number of problems, including
479 security. This option enables these legacy devices; on most
480 systems, it is safe to say N.
481
482
483config LEGACY_PTY_COUNT
484 int "Maximum number of legacy PTY in use"
485 depends on LEGACY_PTYS
Kay Sievers345ee832007-11-14 23:39:42 +0100486 range 0 256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 default "256"
488 ---help---
489 The maximum number of legacy PTYs that can be used at any one time.
490 The default is 256, and should be more than enough. Embedded
491 systems may want to reduce this to save memory.
492
493 When not in use, each legacy PTY occupies 12 bytes on 32-bit
494 architectures and 24 bytes on 64-bit architectures.
495
Samo Pogacnik24b4b672010-08-25 20:44:07 +0200496config TTY_PRINTK
497 bool "TTY driver to output user messages via printk"
498 depends on EMBEDDED
499 default n
500 ---help---
501 If you say Y here, the support for writing user messages (i.e.
502 console messages) via printk is available.
503
504 The feature is useful to inline user messages with kernel
505 messages.
506 In order to use this feature, you should output user messages
507 to /dev/ttyprintk or redirect console to this TTY.
508
509 If unsure, say N.
510
Benjamin Herrenschmidta45b8392006-07-04 15:06:20 +1000511config BRIQ_PANEL
512 tristate 'Total Impact briQ front panel driver'
Paul Mackerras2818c5d2006-08-25 15:08:21 +1000513 depends on PPC_CHRP
Benjamin Herrenschmidta45b8392006-07-04 15:06:20 +1000514 ---help---
515 The briQ is a small footprint CHRP computer with a frontpanel VFD, a
516 tristate led and two switches. It is the size of a CDROM drive.
517
518 If you have such one and want anything showing on the VFD then you
519 must answer Y here.
520
521 To compile this driver as a module, choose M here: the
522 module will be called briq_panel.
523
524 It's safe to say N here.
525
Mike Frysinger2dc63a82008-04-25 08:04:56 +0800526config BFIN_OTP
527 tristate "Blackfin On-Chip OTP Memory Support"
Mike Frysingerf69b2d72009-11-20 19:09:56 +0000528 depends on BLACKFIN && (BF51x || BF52x || BF54x)
Mike Frysinger2dc63a82008-04-25 08:04:56 +0800529 default y
530 help
531 If you say Y here, you will get support for a character device
532 interface into the One Time Programmable memory pages that are
533 stored on the Blackfin processor. This will not get you access
534 to the secure memory pages however. You will need to write your
535 own secure code and reader for that.
536
537 To compile this driver as a module, choose M here: the module
538 will be called bfin-otp.
539
540 If unsure, it is safe to say Y.
541
542config BFIN_OTP_WRITE_ENABLE
543 bool "Enable writing support of OTP pages"
544 depends on BFIN_OTP
545 default n
546 help
547 If you say Y here, you will enable support for writing of the
548 OTP pages. This is dangerous by nature as you can only program
549 the pages once, so only enable this option when you actually
550 need it so as to not inadvertently clobber data.
551
552 If unsure, say N.
553
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554config PRINTER
555 tristate "Parallel printer support"
556 depends on PARPORT
557 ---help---
558 If you intend to attach a printer to the parallel port of your Linux
559 box (as opposed to using a serial printer; if the connector at the
560 printer has 9 or 25 holes ["female"], then it's serial), say Y.
561 Also read the Printing-HOWTO, available from
562 <http://www.tldp.org/docs.html#howto>.
563
564 It is possible to share one parallel port among several devices
565 (e.g. printer and ZIP drive) and it is safe to compile the
566 corresponding drivers into the kernel.
567
568 To compile this driver as a module, choose M here and read
569 <file:Documentation/parport.txt>. The module will be called lp.
570
571 If you have several parallel ports, you can specify which ports to
572 use with the "lp" kernel command line option. (Try "man bootparam"
573 or see the documentation of your boot loader (lilo or loadlin) about
574 how to pass options to the kernel at boot time.) The syntax of the
575 "lp" command line option can be found in <file:drivers/char/lp.c>.
576
577 If you have more than 8 printers, you need to increase the LP_NO
578 macro in lp.c and the PARPORT_MAX macro in parport.h.
579
580config LP_CONSOLE
581 bool "Support for console on line printer"
582 depends on PRINTER
583 ---help---
584 If you want kernel messages to be printed out as they occur, you
585 can have a console on the printer. This option adds support for
586 doing that; to actually get it to happen you need to pass the
587 option "console=lp0" to the kernel at boot time.
588
589 If the printer is out of paper (or off, or unplugged, or too
590 busy..) the kernel will stall until the printer is ready again.
591 By defining CONSOLE_LP_STRICT to 0 (at your own risk) you
592 can make the kernel continue when this happens,
593 but it'll lose the kernel messages.
594
595 If unsure, say N.
596
597config PPDEV
598 tristate "Support for user-space parallel port device drivers"
599 depends on PARPORT
600 ---help---
601 Saying Y to this adds support for /dev/parport device nodes. This
602 is needed for programs that want portable access to the parallel
603 port, for instance deviceid (which displays Plug-and-Play device
604 IDs).
605
606 This is the parallel port equivalent of SCSI generic support (sg).
607 It is safe to say N to this -- it is not needed for normal printing
608 or parallel port CD-ROM/disk support.
609
610 To compile this driver as a module, choose M here: the
611 module will be called ppdev.
612
613 If unsure, say N.
614
Ryan S. Arnold45d607e2006-03-27 21:25:16 +0200615config HVC_DRIVER
616 bool
617 help
Rusty Russell3e6c6f62007-10-16 23:30:13 -0700618 Generic "hypervisor virtual console" infrastructure for various
Rusty Russell2d1df812007-10-16 23:30:14 -0700619 hypervisors (pSeries, iSeries, Xen, lguest).
Ryan S. Arnold45d607e2006-03-27 21:25:16 +0200620 It will automatically be selected if one of the back-end console drivers
621 is selected.
622
Christian Borntraeger611e0972008-06-20 15:24:08 +0200623config HVC_IRQ
624 bool
Ryan S. Arnold45d607e2006-03-27 21:25:16 +0200625
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626config HVC_CONSOLE
627 bool "pSeries Hypervisor Virtual Console support"
628 depends on PPC_PSERIES
Ryan S. Arnold45d607e2006-03-27 21:25:16 +0200629 select HVC_DRIVER
Christian Borntraeger611e0972008-06-20 15:24:08 +0200630 select HVC_IRQ
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 help
632 pSeries machines when partitioned support a hypervisor virtual
633 console. This driver allows each pSeries partition to have a console
634 which is accessed via the HMC.
635
Stephen Rothwell8bff05b2006-07-13 18:51:22 +1000636config HVC_ISERIES
637 bool "iSeries Hypervisor Virtual Console support"
Stephen Rothwellb15f7922007-05-08 15:05:31 +1000638 depends on PPC_ISERIES
639 default y
Stephen Rothwell8bff05b2006-07-13 18:51:22 +1000640 select HVC_DRIVER
Christian Borntraeger611e0972008-06-20 15:24:08 +0200641 select HVC_IRQ
Kamalesh Babulald2b43972009-01-06 05:57:24 +0000642 select VIOPATH
Stephen Rothwell8bff05b2006-07-13 18:51:22 +1000643 help
644 iSeries machines support a hypervisor virtual console.
645
Arnd Bergmannf4d17492006-03-27 21:26:03 +0200646config HVC_RTAS
647 bool "IBM RTAS Console support"
648 depends on PPC_RTAS
649 select HVC_DRIVER
650 help
651 IBM Console device driver which makes use of RTAS
652
Ishizaki Kou3cdc20e2007-02-02 16:44:08 +0900653config HVC_BEAT
654 bool "Toshiba's Beat Hypervisor Console support"
655 depends on PPC_CELLEB
656 select HVC_DRIVER
657 help
658 Toshiba's Cell Reference Set Beat Console device driver
659
Hendrik Brueckner44a01d52008-12-25 13:38:57 +0100660config HVC_IUCV
661 bool "z/VM IUCV Hypervisor console support (VM only)"
662 depends on S390
663 select HVC_DRIVER
664 select IUCV
665 default y
666 help
667 This driver provides a Hypervisor console (HVC) back-end to access
668 a Linux (console) terminal via a z/VM IUCV communication path.
669
Jeremy Fitzhardingeb536b4b2007-07-17 18:37:06 -0700670config HVC_XEN
671 bool "Xen Hypervisor Console support"
672 depends on XEN
673 select HVC_DRIVER
Christian Borntraeger611e0972008-06-20 15:24:08 +0200674 select HVC_IRQ
Jeremy Fitzhardingeb536b4b2007-07-17 18:37:06 -0700675 default y
676 help
677 Xen virtual console device driver
678
David Gibsond5e54912008-11-05 14:20:17 +0000679config HVC_UDBG
680 bool "udbg based fake hypervisor console"
681 depends on PPC && EXPERIMENTAL
682 select HVC_DRIVER
683 default n
684
Rusty Russell31610432007-10-22 11:03:39 +1000685config VIRTIO_CONSOLE
Christian Borntraeger7721c492008-07-25 12:06:06 -0500686 tristate "Virtio console"
687 depends on VIRTIO
Rusty Russell31610432007-10-22 11:03:39 +1000688 select HVC_DRIVER
Christian Borntraeger7721c492008-07-25 12:06:06 -0500689 help
690 Virtio console for use with lguest and other hypervisors.
691
Amit Shahfb08bd22009-12-21 21:36:04 +0530692 Also serves as a general-purpose serial device for data
693 transfer between the guest and host. Character devices at
694 /dev/vportNpn will be created when corresponding ports are
695 found, where N is the device number and n is the port number
696 within that device. If specified by the host, a sysfs
697 attribute called 'name' will be populated with a name for
698 the port which can be used by udev scripts to create a
699 symlink to the device.
Rusty Russell31610432007-10-22 11:03:39 +1000700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701config HVCS
702 tristate "IBM Hypervisor Virtual Console Server support"
Kamalesh Babulalaa8b83c2009-09-25 03:31:43 +0000703 depends on PPC_PSERIES && HVC_CONSOLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 help
705 Partitionable IBM Power5 ppc64 machines allow hosting of
706 firmware virtual consoles from one Linux partition by
707 another Linux partition. This driver allows console data
708 from Linux partitions to be accessed through TTY device
709 interfaces in the device tree of a Linux partition running
710 this driver.
711
712 To compile this driver as a module, choose M here: the
Pavel Machek4737f092009-06-05 00:44:53 +0200713 module will be called hvcs. Additionally, this module
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 will depend on arch specific APIs exported from hvcserver.ko
715 which will also be compiled when this driver is built as a
716 module.
717
Sonny Raofe9e8d52008-07-08 15:45:11 +1000718config IBM_BSR
719 tristate "IBM POWER Barrier Synchronization Register support"
720 depends on PPC_PSERIES
721 help
722 This devices exposes a hardware mechanism for fast synchronization
723 of threads across a large system which avoids bouncing a cacheline
724 between several cores on a system
725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726source "drivers/char/ipmi/Kconfig"
727
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728config DS1620
729 tristate "NetWinder thermometer support"
730 depends on ARCH_NETWINDER
731 help
732 Say Y here to include support for the thermal management hardware
733 found in the NetWinder. This driver allows the user to control the
734 temperature set points and to read the current temperature.
735
736 It is also possible to say M here to build it as a module (ds1620)
737 It is recommended to be used on a NetWinder, but it is not a
738 necessity.
739
740config NWBUTTON
741 tristate "NetWinder Button"
742 depends on ARCH_NETWINDER
743 ---help---
744 If you say Y here and create a character device node /dev/nwbutton
745 with major and minor numbers 10 and 158 ("man mknod"), then every
746 time the orange button is pressed a number of times, the number of
747 times the button was pressed will be written to that device.
748
749 This is most useful for applications, as yet unwritten, which
750 perform actions based on how many times the button is pressed in a
751 row.
752
753 Do not hold the button down for too long, as the driver does not
754 alter the behaviour of the hardware reset circuitry attached to the
755 button; it will still execute a hard reset if the button is held
756 down for longer than approximately five seconds.
757
758 To compile this driver as a module, choose M here: the
759 module will be called nwbutton.
760
761 Most people will answer Y to this question and "Reboot Using Button"
762 below to be able to initiate a system shutdown from the button.
763
764config NWBUTTON_REBOOT
765 bool "Reboot Using Button"
766 depends on NWBUTTON
767 help
768 If you say Y here, then you will be able to initiate a system
769 shutdown and reboot by pressing the orange button a number of times.
770 The number of presses to initiate the shutdown is two by default,
771 but this can be altered by modifying the value of NUM_PRESSES_REBOOT
772 in nwbutton.h and recompiling the driver or, if you compile the
773 driver as a module, you can specify the number of presses at load
774 time with "insmod button reboot_count=<something>".
775
776config NWFLASH
777 tristate "NetWinder flash support"
778 depends on ARCH_NETWINDER
779 ---help---
780 If you say Y here and create a character device /dev/flash with
781 major 10 and minor 160 you can manipulate the flash ROM containing
782 the NetWinder firmware. Be careful as accidentally overwriting the
783 flash contents can render your computer unbootable. On no account
784 allow random users access to this device. :-)
785
786 To compile this driver as a module, choose M here: the
787 module will be called nwflash.
788
789 If you're not sure, say N.
790
Michael Buesch844dd052006-06-26 00:24:59 -0700791source "drivers/char/hw_random/Kconfig"
792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793config NVRAM
794 tristate "/dev/nvram support"
Uwe Kleine-König807a96c2009-01-31 01:21:59 +0100795 depends on ATARI || X86 || (ARM && RTC_DRV_CMOS) || GENERIC_NVRAM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 ---help---
797 If you say Y here and create a character special file /dev/nvram
798 with major number 10 and minor number 144 using mknod ("man mknod"),
799 you get read and write access to the extra bytes of non-volatile
800 memory in the real time clock (RTC), which is contained in every PC
801 and most Ataris. The actual number of bytes varies, depending on the
802 nvram in the system, but is usually 114 (128-14 for the RTC).
803
804 This memory is conventionally called "CMOS RAM" on PCs and "NVRAM"
805 on Ataris. /dev/nvram may be used to view settings there, or to
806 change them (with some utility). It could also be used to frequently
807 save a few bits of very important data that may not be lost over
808 power-off and for which writing to disk is too insecure. Note
809 however that most NVRAM space in a PC belongs to the BIOS and you
810 should NEVER idly tamper with it. See Ralf Brown's interrupt list
811 for a guide to the use of CMOS bytes by your BIOS.
812
813 On Atari machines, /dev/nvram is always configured and does not need
814 to be selected.
815
816 To compile this driver as a module, choose M here: the
817 module will be called nvram.
818
David Brownellc7500902008-04-28 02:11:52 -0700819#
820# These legacy RTC drivers just cause too many conflicts with the generic
821# RTC framework ... let's not even try to coexist any more.
822#
823if RTC_LIB=n
824
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825config RTC
David Brownelle6d2bb22008-06-12 15:21:55 -0700826 tristate "Enhanced Real Time Clock Support (legacy PC RTC driver)"
David Brownellc7500902008-04-28 02:11:52 -0700827 depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV \
Mike Frysinger7bfa58d2009-06-17 16:26:14 -0700828 && !ARM && !SUPERH && !S390 && !AVR32 && !BLACKFIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 ---help---
830 If you say Y here and create a character special file /dev/rtc with
831 major number 10 and minor number 135 using mknod ("man mknod"), you
832 will get access to the real time clock (or hardware clock) built
833 into your computer.
834
835 Every PC has such a clock built in. It can be used to generate
836 signals from as low as 1Hz up to 8192Hz, and can also be used
837 as a 24 hour alarm. It reports status information via the file
838 /proc/driver/rtc and its behaviour is set by various ioctls on
839 /dev/rtc.
840
841 If you run Linux on a multiprocessor machine and said Y to
842 "Symmetric Multi Processing" above, you should say Y here to read
843 and set the RTC in an SMP compatible fashion.
844
845 If you think you have a use for such a device (such as periodic data
846 sampling), then say Y here, and read <file:Documentation/rtc.txt>
847 for details.
848
849 To compile this driver as a module, choose M here: the
850 module will be called rtc.
851
Al Viro22405982007-07-22 00:37:48 -0700852config JS_RTC
853 tristate "Enhanced Real Time Clock Support"
854 depends on SPARC32 && PCI
855 ---help---
856 If you say Y here and create a character special file /dev/rtc with
857 major number 10 and minor number 135 using mknod ("man mknod"), you
858 will get access to the real time clock (or hardware clock) built
859 into your computer.
860
861 Every PC has such a clock built in. It can be used to generate
862 signals from as low as 1Hz up to 8192Hz, and can also be used
863 as a 24 hour alarm. It reports status information via the file
864 /proc/driver/rtc and its behaviour is set by various ioctls on
865 /dev/rtc.
866
867 If you think you have a use for such a device (such as periodic data
868 sampling), then say Y here, and read <file:Documentation/rtc.txt>
869 for details.
870
871 To compile this driver as a module, choose M here: the
872 module will be called js-rtc.
873
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874config GEN_RTC
875 tristate "Generic /dev/rtc emulation"
Mike Frysinger103d6d92009-01-06 14:42:10 -0800876 depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32 && !BLACKFIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 ---help---
878 If you say Y here and create a character special file /dev/rtc with
879 major number 10 and minor number 135 using mknod ("man mknod"), you
880 will get access to the real time clock (or hardware clock) built
881 into your computer.
882
883 It reports status information via the file /proc/driver/rtc and its
884 behaviour is set by various ioctls on /dev/rtc. If you enable the
885 "extended RTC operation" below it will also provide an emulation
886 for RTC_UIE which is required by some programs and may improve
887 precision in some cases.
888
889 To compile this driver as a module, choose M here: the
890 module will be called genrtc.
891
892config GEN_RTC_X
893 bool "Extended RTC operation"
894 depends on GEN_RTC
895 help
896 Provides an emulation for RTC_UIE which is required by some programs
897 and may improve precision of the generic RTC support in some cases.
898
899config EFI_RTC
900 bool "EFI Real Time Clock Services"
901 depends on IA64
902
903config DS1302
904 tristate "DS1302 RTC support"
905 depends on M32R && (PLAT_M32700UT || PLAT_OPSPUT)
906 help
907 If you say Y here and create a character special file /dev/rtc with
908 major number 121 and minor number 0 using mknod ("man mknod"), you
909 will get access to the real time clock (or hardware clock) built
910 into your computer.
911
David Brownellc7500902008-04-28 02:11:52 -0700912endif # RTC_LIB
913
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914config DTLK
915 tristate "Double Talk PC internal speech card support"
Martin Schwidefskyeeca7a32007-05-10 15:45:56 +0200916 depends on ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 help
918 This driver is for the DoubleTalk PC, a speech synthesizer
919 manufactured by RC Systems (<http://www.rcsys.com/>). It is also
920 called the `internal DoubleTalk'.
921
922 To compile this driver as a module, choose M here: the
923 module will be called dtlk.
924
Stephen Neuendorfferef141a02008-02-06 04:24:09 +1100925config XILINX_HWICAP
926 tristate "Xilinx HWICAP Support"
Michal Simek6fa612b2009-05-11 15:49:12 +0200927 depends on XILINX_VIRTEX || MICROBLAZE
Stephen Neuendorfferef141a02008-02-06 04:24:09 +1100928 help
929 This option enables support for Xilinx Internal Configuration
930 Access Port (ICAP) driver. The ICAP is used on Xilinx Virtex
931 FPGA platforms to partially reconfigure the FPGA at runtime.
932
933 If unsure, say N.
934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935config R3964
936 tristate "Siemens R3964 line discipline"
937 ---help---
938 This driver allows synchronous communication with devices using the
939 Siemens R3964 packet protocol. Unless you are dealing with special
940 hardware like PLCs, you are unlikely to need this.
941
942 To compile this driver as a module, choose M here: the
943 module will be called n_r3964.
944
945 If unsure, say N.
946
947config APPLICOM
948 tristate "Applicom intelligent fieldbus card support"
949 depends on PCI
950 ---help---
951 This driver provides the kernel-side support for the intelligent
952 fieldbus cards made by Applicom International. More information
953 about these cards can be found on the WWW at the address
954 <http://www.applicom-int.com/>, or by email from David Woodhouse
955 <dwmw2@infradead.org>.
956
957 To compile this driver as a module, choose M here: the
958 module will be called applicom.
959
960 If unsure, say N.
961
962config SONYPI
963 tristate "Sony Vaio Programmable I/O Control Device support (EXPERIMENTAL)"
964 depends on EXPERIMENTAL && X86 && PCI && INPUT && !64BIT
965 ---help---
966 This driver enables access to the Sony Programmable I/O Control
967 Device which can be found in many (all ?) Sony Vaio laptops.
968
969 If you have one of those laptops, read
Carlos Corbacho018a6512008-02-09 01:32:19 +0000970 <file:Documentation/laptops/sonypi.txt>, and say Y or M here.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
972 To compile this driver as a module, choose M here: the
973 module will be called sonypi.
974
Yoichi Yuasa09762512007-05-06 14:51:58 -0700975config GPIO_TB0219
976 tristate "TANBAC TB0219 GPIO support"
Robert P. J. Daybef1f402006-12-12 20:04:19 +0100977 depends on TANBAC_TB022X
Yoichi Yuasa584e1232006-06-25 05:49:11 -0700978 select GPIO_VR41XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980source "drivers/char/pcmcia/Kconfig"
981
982config MWAVE
983 tristate "ACP Modem (Mwave) support"
984 depends on X86
985 select SERIAL_8250
986 ---help---
987 The ACP modem (Mwave) for Linux is a WinModem. It is composed of a
988 kernel driver and a user level application. Together these components
989 support direct attachment to public switched telephone networks (PSTNs)
990 and support selected world wide countries.
991
992 This version of the ACP Modem driver supports the IBM Thinkpad 600E,
993 600, and 770 that include on board ACP modem hardware.
994
995 The modem also supports the standard communications port interface
996 (ttySx) and is compatible with the Hayes AT Command Set.
997
998 The user level application needed to use this driver can be found at
999 the IBM Linux Technology Center (LTC) web site:
1000 <http://www.ibm.com/linux/ltc/>.
1001
1002 If you own one of the above IBM Thinkpads which has the Mwave chipset
1003 in it, say Y.
1004
1005 To compile this driver as a module, choose M here: the
1006 module will be called mwave.
1007
1008config SCx200_GPIO
1009 tristate "NatSemi SCx200 GPIO Support"
1010 depends on SCx200
Jim Cromie7a8e2a52006-06-27 02:54:27 -07001011 select NSC_GPIO
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 help
1013 Give userspace access to the GPIO pins on the National
1014 Semiconductor SCx200 processors.
1015
1016 If compiled as a module, it will be called scx200_gpio.
1017
Jim Cromie7a8e2a52006-06-27 02:54:27 -07001018config PC8736x_GPIO
1019 tristate "NatSemi PC8736x GPIO Support"
Randy Dunlap7b958092010-08-11 14:17:30 -07001020 depends on X86_32
Jim Cromie7a8e2a52006-06-27 02:54:27 -07001021 default SCx200_GPIO # mostly N
1022 select NSC_GPIO # needed for support routines
1023 help
1024 Give userspace access to the GPIO pins on the National
1025 Semiconductor PC-8736x (x=[03456]) SuperIO chip. The chip
1026 has multiple functional units, inc several managed by
1027 hwmon/pc87360 driver. Tested with PC-87366
1028
1029 If compiled as a module, it will be called pc8736x_gpio.
1030
1031config NSC_GPIO
1032 tristate "NatSemi Base GPIO Support"
Dave Jones699352c2006-06-29 02:24:32 -07001033 depends on X86_32
Jim Cromie7a8e2a52006-06-27 02:54:27 -07001034 # selected by SCx200_GPIO and PC8736x_GPIO
1035 # what about 2 selectors differing: m != y
1036 help
1037 Common support used (and needed) by scx200_gpio and
1038 pc8736x_gpio drivers. If those drivers are built as
1039 modules, this one will be too, named nsc_gpio
1040
Ben Gardnere3291132006-01-09 20:51:29 -08001041config CS5535_GPIO
1042 tristate "AMD CS5535/CS5536 GPIO (Geode Companion Device)"
1043 depends on X86_32
1044 help
1045 Give userspace access to the GPIO pins on the AMD CS5535 and
1046 CS5536 Geode companion devices.
1047
1048 If compiled as a module, it will be called cs5535_gpio.
1049
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050config RAW_DRIVER
Dave Jonesabd4aa52007-07-15 23:40:49 -07001051 tristate "RAW driver (/dev/raw/rawN)"
David Howells93614012006-09-30 20:45:40 +02001052 depends on BLOCK
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 help
Dave Jonesabd4aa52007-07-15 23:40:49 -07001054 The raw driver permits block devices to be bound to /dev/raw/rawN.
1055 Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 See the raw(8) manpage for more details.
1057
Dave Jonesabd4aa52007-07-15 23:40:49 -07001058 Applications should preferably open the device (eg /dev/hda1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 with the O_DIRECT flag.
1060
Andrew Morton0de502a2005-12-12 00:37:41 -08001061config MAX_RAW_DEVS
1062 int "Maximum number of RAW devices to support (1-8192)"
1063 depends on RAW_DRIVER
1064 default "256"
1065 help
1066 The maximum number of RAW devices that are supported.
1067 Default is 256. Increase this number in case you need lots of
1068 raw devices.
1069
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070config HPET
1071 bool "HPET - High Precision Event Timer" if (X86 || IA64)
1072 default n
1073 depends on ACPI
1074 help
1075 If you say Y here, you will have a miscdevice named "/dev/hpet/". Each
1076 open selects one of the timers supported by the HPET. The timers are
Matt LaPlante3cb2fcc2006-11-30 05:22:59 +01001077 non-periodic and/or periodic.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079config HPET_MMAP
1080 bool "Allow mmap of HPET"
1081 default y
1082 depends on HPET
1083 help
1084 If you say Y here, user applications will be able to mmap
1085 the HPET registers.
1086
1087 In some hardware implementations, the page containing HPET
1088 registers may also contain other things that shouldn't be
1089 exposed to the user. If this applies to your hardware,
1090 say N here.
1091
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092config HANGCHECK_TIMER
1093 tristate "Hangcheck timer"
Martin Schwidefskyabf3ea12007-05-10 15:45:59 +02001094 depends on X86 || IA64 || PPC64 || S390
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 help
1096 The hangcheck-timer module detects when the system has gone
1097 out to lunch past a certain margin. It can reboot the system
1098 or merely print a warning.
1099
1100config MMTIMER
1101 tristate "MMTIMER Memory mapped RTC for SGI Altix"
1102 depends on IA64_GENERIC || IA64_SGI_SN2
1103 default y
1104 help
1105 The mmtimer device allows direct userspace access to the
1106 Altix system timer.
1107
Dimitri Sivanichfbd8ae12009-09-23 15:57:15 -07001108config UV_MMTIMER
1109 tristate "UV_MMTIMER Memory mapped RTC for SGI UV"
1110 depends on X86_UV
1111 default m
1112 help
1113 The uv_mmtimer device allows direct userspace access to the
1114 UV system timer.
1115
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116source "drivers/char/tpm/Kconfig"
1117
Mark Gross1a80ba82005-10-30 15:02:55 -08001118config TELCLOCK
Mark Gross03154a22007-03-06 13:58:45 -08001119 tristate "Telecom clock driver for ATCA SBC"
Geert Uytterhoeven4d99bfa2006-10-16 19:59:43 +02001120 depends on EXPERIMENTAL && X86
Mark Gross1a80ba82005-10-30 15:02:55 -08001121 default n
1122 help
Mark Gross03154a22007-03-06 13:58:45 -08001123 The telecom clock device is specific to the MPCBL0010 and MPCBL0050
1124 ATCA computers and allows direct userspace access to the
1125 configuration of the telecom clock configuration settings. This
1126 device is used for hardware synchronization across the ATCA backplane
1127 fabric. Upon loading, the driver exports a sysfs directory,
1128 /sys/devices/platform/telco_clock, with a number of files for
1129 controlling the behavior of this hardware.
Mark Gross1a80ba82005-10-30 15:02:55 -08001130
Russell King4f911d62007-05-08 00:28:17 -07001131config DEVPORT
1132 bool
1133 depends on !M68K
1134 depends on ISA || PCI
1135 default y
1136
Martin Schwidefsky61d48c22007-05-10 15:46:00 +02001137source "drivers/s390/char/Kconfig"
1138
Marco Stornelli56d611a2010-05-26 14:43:54 -07001139config RAMOOPS
1140 tristate "Log panic/oops to a RAM buffer"
Heiko Carstensb7e5d1f2010-06-04 14:14:48 -07001141 depends on HAS_IOMEM
Marco Stornelli56d611a2010-05-26 14:43:54 -07001142 default n
1143 help
1144 This enables panic and oops messages to be logged to a circular
1145 buffer in RAM where it can be read back at some later point.
1146
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147endmenu
1148