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Commit | Line | Data |
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1da177e4 LT |
1 | # |
2 | # Character device configuration | |
3 | # | |
4 | ||
5 | menu "Character devices" | |
6 | ||
7 | config VT | |
8 | bool "Virtual terminal" if EMBEDDED | |
abf3ea1b | 9 | depends on !S390 |
1da177e4 | 10 | select INPUT |
4c514a5a | 11 | default y |
1da177e4 LT |
12 | ---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 | ||
a29ccf6f DW |
39 | config 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 | ||
1da177e4 LT |
47 | config 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 | ||
69 | config HW_CONSOLE | |
70 | bool | |
71 | depends on VT && !S390 && !UML | |
72 | default y | |
73 | ||
13ae6645 AD |
74 | config 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 | ||
b781ecb6 AV |
91 | config 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 | ||
1da177e4 LT |
100 | config SERIAL_NONSTANDARD |
101 | bool "Non-standard serial port support" | |
eeca7a36 | 102 | depends on HAS_IOMEM |
1da177e4 LT |
103 | ---help--- |
104 | Say Y here if you have any non-standard serial boards -- boards | |
105 | which aren't supported using the standard "dumb" serial driver. | |
106 | This includes intelligent serial boards such as Cyclades, | |
107 | Digiboards, etc. These are usually used for systems that need many | |
108 | serial ports because they serve many terminals or dial-in | |
109 | connections. | |
110 | ||
111 | Note that the answer to this question won't directly affect the | |
112 | kernel: saying N will just cause the configurator to skip all | |
113 | the questions about non-standard serial boards. | |
114 | ||
115 | Most people can say N here. | |
116 | ||
117 | config COMPUTONE | |
118 | tristate "Computone IntelliPort Plus serial support" | |
3b4709a6 | 119 | depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI) |
1da177e4 LT |
120 | ---help--- |
121 | This driver supports the entire family of Intelliport II/Plus | |
122 | controllers with the exception of the MicroChannel controllers and | |
123 | products previous to the Intelliport II. These are multiport cards, | |
124 | which give you many serial ports. You would need something like this | |
125 | to connect more than two modems to your Linux box, for instance in | |
126 | order to become a dial-in server. If you have a card like that, say | |
31c00fc1 | 127 | Y here and read <file:Documentation/serial/computone.txt>. |
1da177e4 | 128 | |
33dda515 RK |
129 | To compile this driver as module, choose M here: the |
130 | module will be called ip2. | |
1da177e4 LT |
131 | |
132 | config ROCKETPORT | |
133 | tristate "Comtrol RocketPort support" | |
27d41718 | 134 | depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI) |
1da177e4 LT |
135 | help |
136 | This driver supports Comtrol RocketPort and RocketModem PCI boards. | |
137 | These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or | |
138 | modems. For information about the RocketPort/RocketModem boards | |
31c00fc1 | 139 | and this driver read <file:Documentation/serial/rocket.txt>. |
1da177e4 LT |
140 | |
141 | To compile this driver as a module, choose M here: the | |
142 | module will be called rocket. | |
143 | ||
144 | If you want to compile this driver into the kernel, say Y here. If | |
145 | you don't have a Comtrol RocketPort/RocketModem card installed, say N. | |
146 | ||
147 | config CYCLADES | |
148 | tristate "Cyclades async mux support" | |
cff9494f | 149 | depends on SERIAL_NONSTANDARD && (PCI || ISA) |
ee2077d9 | 150 | select FW_LOADER |
1da177e4 LT |
151 | ---help--- |
152 | This driver supports Cyclades Z and Y multiserial boards. | |
153 | You would need something like this to connect more than two modems to | |
154 | your Linux box, for instance in order to become a dial-in server. | |
155 | ||
156 | For information about the Cyclades-Z card, read | |
31c00fc1 | 157 | <file:Documentation/serial/README.cycladesZ>. |
1da177e4 LT |
158 | |
159 | To compile this driver as a module, choose M here: the | |
160 | module will be called cyclades. | |
161 | ||
162 | If you haven't heard about it, it's safe to say N. | |
163 | ||
164 | config CYZ_INTR | |
165 | bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)" | |
166 | depends on EXPERIMENTAL && CYCLADES | |
167 | help | |
168 | The Cyclades-Z family of multiport cards allows 2 (two) driver op | |
169 | modes: polling and interrupt. In polling mode, the driver will check | |
170 | the status of the Cyclades-Z ports every certain amount of time | |
171 | (which is called polling cycle and is configurable). In interrupt | |
172 | mode, it will use an interrupt line (IRQ) in order to check the | |
173 | status of the Cyclades-Z ports. The default op mode is polling. If | |
174 | unsure, say N. | |
175 | ||
176 | config DIGIEPCA | |
177 | tristate "Digiboard Intelligent Async Support" | |
dcbf1280 | 178 | depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI) |
1da177e4 LT |
179 | ---help--- |
180 | This is a driver for Digi International's Xx, Xeve, and Xem series | |
181 | of cards which provide multiple serial ports. You would need | |
182 | something like this to connect more than two modems to your Linux | |
183 | box, for instance in order to become a dial-in server. This driver | |
184 | supports the original PC (ISA) boards as well as PCI, and EISA. If | |
185 | you have a card like this, say Y here and read the file | |
31c00fc1 | 186 | <file:Documentation/serial/digiepca.txt>. |
1da177e4 LT |
187 | |
188 | To compile this driver as a module, choose M here: the | |
189 | module will be called epca. | |
190 | ||
191 | config ESPSERIAL | |
192 | tristate "Hayes ESP serial port support" | |
0fdeceb8 | 193 | depends on SERIAL_NONSTANDARD && ISA && ISA_DMA_API && BROKEN |
1da177e4 LT |
194 | help |
195 | This is a driver which supports Hayes ESP serial ports. Both single | |
196 | port cards and multiport cards are supported. Make sure to read | |
197 | <file:Documentation/hayes-esp.txt>. | |
198 | ||
199 | To compile this driver as a module, choose M here: the | |
200 | module will be called esp. | |
201 | ||
202 | If unsure, say N. | |
203 | ||
204 | config MOXA_INTELLIO | |
205 | tristate "Moxa Intellio support" | |
8a023674 | 206 | depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI) |
4920916f | 207 | select FW_LOADER |
1da177e4 LT |
208 | 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 | ||
214 | config MOXA_SMARTIO | |
98c47ea2 | 215 | tristate "Moxa SmartIO support v. 2.0" |
fb0c9295 | 216 | depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA) |
037ad48b JS |
217 | 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 | ||
037ad48b | 224 | This driver can also be built as a module. The module will be called |
1c45607a | 225 | mxser. If you want to do that, say M here. |
037ad48b | 226 | |
1da177e4 LT |
227 | config ISI |
228 | tristate "Multi-Tech multiport card support (EXPERIMENTAL)" | |
6d889724 | 229 | depends on SERIAL_NONSTANDARD && PCI |
5ff2a7e2 | 230 | select FW_LOADER |
1da177e4 LT |
231 | 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 | ||
237 | config SYNCLINK | |
238 | tristate "Microgate SyncLink card support" | |
a5532606 | 239 | depends on SERIAL_NONSTANDARD && PCI && ISA_DMA_API |
1da177e4 LT |
240 | 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 | ||
250 | config SYNCLINKMP | |
251 | tristate "SyncLink Multiport support" | |
8a023674 | 252 | depends on SERIAL_NONSTANDARD && PCI |
1da177e4 LT |
253 | 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 | ||
705b6c7b PF |
264 | config SYNCLINK_GT |
265 | tristate "SyncLink GT/AC support" | |
8ef9cf31 | 266 | depends on SERIAL_NONSTANDARD && PCI |
705b6c7b PF |
267 | 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 | ||
1da177e4 LT |
272 | config 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 | ||
284 | config RISCOM8 | |
285 | tristate "SDL RISCom/8 card support" | |
781cff5c | 286 | depends on SERIAL_NONSTANDARD |
1da177e4 LT |
287 | 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, | |
31c00fc1 | 292 | say Y here and read the file <file:Documentation/serial/riscom8.txt>. |
1da177e4 LT |
293 | |
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 | ||
297 | config SPECIALIX | |
298 | tristate "Specialix IO8+ card support" | |
faa7612c | 299 | depends on SERIAL_NONSTANDARD |
1da177e4 LT |
300 | 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 | |
31c00fc1 RD |
307 | <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 | |
1da177e4 LT |
309 | called specialix. |
310 | ||
1da177e4 LT |
311 | config SX |
312 | tristate "Specialix SX (and SI) card support" | |
3468a33e | 313 | depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA) |
1da177e4 LT |
314 | help |
315 | This is a driver for the SX and SI multiport serial cards. | |
31c00fc1 | 316 | Please read the file <file:Documentation/serial/sx.txt> for details. |
1da177e4 LT |
317 | |
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 | ||
322 | config RIO | |
323 | tristate "Specialix RIO system support" | |
655fdeab | 324 | depends on SERIAL_NONSTANDARD |
1da177e4 LT |
325 | 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 | ||
331 | config 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 | ||
339 | config 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 | |
31c00fc1 RD |
347 | 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 | |
1da177e4 LT |
349 | say N. |
350 | ||
351 | config STALLION | |
352 | tristate "Stallion EasyIO or EC8/32 support" | |
d18a750f | 353 | depends on STALDRV && (ISA || EISA || PCI) |
1da177e4 LT |
354 | 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 | |
31c00fc1 | 357 | <file:Documentation/serial/stallion.txt>. |
1da177e4 LT |
358 | |
359 | To compile this driver as a module, choose M here: the | |
360 | module will be called stallion. | |
361 | ||
362 | config ISTALLION | |
363 | tristate "Stallion EC8/64, ONboard, Brumby support" | |
d18a750f | 364 | depends on STALDRV && (ISA || EISA || PCI) |
1da177e4 LT |
365 | help |
366 | If you have an EasyConnection 8/64, ONboard, Brumby or Stallion | |
367 | serial multiport card, say Y here. Make sure to read | |
31c00fc1 | 368 | <file:Documentation/serial/stallion.txt>. |
1da177e4 LT |
369 | |
370 | To compile this driver as a module, choose M here: the | |
371 | module will be called istallion. | |
372 | ||
20fd1e3b FS |
373 | config 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 | ||
1da177e4 LT |
383 | config A2232 |
384 | tristate "Commodore A2232 serial support (EXPERIMENTAL)" | |
385 | depends on EXPERIMENTAL && ZORRO && BROKEN_ON_SMP | |
386 | ---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 | ||
399 | config 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 | ||
e1e19747 BL |
407 | config 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 | ||
414 | config SGI_MBCS | |
415 | tristate "SGI FPGA Core Services driver support" | |
ae40aae9 | 416 | depends on SGI_TIOCX |
e1e19747 BL |
417 | help |
418 | If you have an SGI Altix with an attached SABrick | |
419 | say Y or M here, otherwise say N. | |
420 | ||
1da177e4 LT |
421 | source "drivers/serial/Kconfig" |
422 | ||
423 | config 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 | ||
e4adca27 SB |
446 | config 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 | ||
1da177e4 LT |
457 | config 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 | ||
475 | config LEGACY_PTY_COUNT | |
476 | int "Maximum number of legacy PTY in use" | |
477 | depends on LEGACY_PTYS | |
345ee839 | 478 | range 0 256 |
1da177e4 LT |
479 | 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 | ||
a45b8395 BH |
488 | config BRIQ_PANEL |
489 | tristate 'Total Impact briQ front panel driver' | |
2818c5de | 490 | depends on PPC_CHRP |
a45b8395 BH |
491 | ---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 | ||
2dc63a84 MF |
503 | config BFIN_OTP |
504 | tristate "Blackfin On-Chip OTP Memory Support" | |
505 | depends on BLACKFIN && (BF52x || BF54x) | |
506 | 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 | ||
519 | config 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 | ||
1da177e4 LT |
531 | config 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 | ||
557 | config 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 | ||
574 | config 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 | ||
45d607ed RA |
592 | config HVC_DRIVER |
593 | bool | |
594 | help | |
3e6c6f63 | 595 | Generic "hypervisor virtual console" infrastructure for various |
2d1df815 | 596 | hypervisors (pSeries, iSeries, Xen, lguest). |
45d607ed RA |
597 | It will automatically be selected if one of the back-end console drivers |
598 | is selected. | |
599 | ||
611e097d CB |
600 | config HVC_IRQ |
601 | bool | |
45d607ed | 602 | |
1da177e4 LT |
603 | config HVC_CONSOLE |
604 | bool "pSeries Hypervisor Virtual Console support" | |
605 | depends on PPC_PSERIES | |
45d607ed | 606 | select HVC_DRIVER |
611e097d | 607 | select HVC_IRQ |
1da177e4 LT |
608 | 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 | ||
8bff05b0 SR |
613 | config HVC_ISERIES |
614 | bool "iSeries Hypervisor Virtual Console support" | |
b15f792f SR |
615 | depends on PPC_ISERIES |
616 | default y | |
8bff05b0 | 617 | select HVC_DRIVER |
611e097d | 618 | select HVC_IRQ |
d2b4397b | 619 | select VIOPATH |
8bff05b0 SR |
620 | help |
621 | iSeries machines support a hypervisor virtual console. | |
622 | ||
f4d1749e AB |
623 | config 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 | ||
3cdc20e5 IK |
630 | config 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 | ||
44a01d5b HB |
637 | config 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 | ||
b536b4b9 JF |
647 | config HVC_XEN |
648 | bool "Xen Hypervisor Console support" | |
649 | depends on XEN | |
650 | select HVC_DRIVER | |
611e097d | 651 | select HVC_IRQ |
b536b4b9 JF |
652 | default y |
653 | help | |
654 | Xen virtual console device driver | |
655 | ||
d5e54913 DG |
656 | config HVC_UDBG |
657 | bool "udbg based fake hypervisor console" | |
658 | depends on PPC && EXPERIMENTAL | |
659 | select HVC_DRIVER | |
660 | default n | |
661 | ||
31610434 | 662 | config VIRTIO_CONSOLE |
7721c494 CB |
663 | tristate "Virtio console" |
664 | depends on VIRTIO | |
31610434 | 665 | select HVC_DRIVER |
7721c494 CB |
666 | help |
667 | Virtio console for use with lguest and other hypervisors. | |
668 | ||
31610434 | 669 | |
1da177e4 LT |
670 | config 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 | |
682 | module will be called hvcs.ko. Additionally, this module | |
683 | 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 | ||
fe9e8d53 SR |
687 | config 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 | ||
1da177e4 LT |
695 | source "drivers/char/ipmi/Kconfig" |
696 | ||
1da177e4 LT |
697 | config 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 | ||
709 | config 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 | ||
733 | config 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 | ||
745 | config 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 | ||
844dd05f MB |
760 | source "drivers/char/hw_random/Kconfig" |
761 | ||
1da177e4 LT |
762 | config NVRAM |
763 | tristate "/dev/nvram support" | |
807a96cd | 764 | depends on ATARI || X86 || (ARM && RTC_DRV_CMOS) || GENERIC_NVRAM |
1da177e4 LT |
765 | ---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 | ||
c7500900 DB |
788 | # |
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 | # | |
792 | if RTC_LIB=n | |
793 | ||
1da177e4 | 794 | config RTC |
e6d2bb2b | 795 | tristate "Enhanced Real Time Clock Support (legacy PC RTC driver)" |
c7500900 DB |
796 | depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV \ |
797 | && !ARM && !SUPERH && !S390 && !AVR32 | |
1da177e4 LT |
798 | ---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 | ||
2240598c AV |
821 | config 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 | ||
1da177e4 LT |
843 | config GEN_RTC |
844 | tristate "Generic /dev/rtc emulation" | |
103d6d91 | 845 | depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32 && !BLACKFIN |
1da177e4 LT |
846 | ---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 | ||
861 | config 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 | ||
868 | config EFI_RTC | |
869 | bool "EFI Real Time Clock Services" | |
870 | depends on IA64 | |
871 | ||
872 | config 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 | ||
c7500900 DB |
881 | endif # RTC_LIB |
882 | ||
1da177e4 LT |
883 | config DTLK |
884 | tristate "Double Talk PC internal speech card support" | |
eeca7a36 | 885 | depends on ISA |
1da177e4 LT |
886 | 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 | ||
ef141a0b SN |
894 | config XILINX_HWICAP |
895 | tristate "Xilinx HWICAP Support" | |
896 | depends on XILINX_VIRTEX | |
897 | 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 | ||
1da177e4 LT |
904 | config 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 | ||
916 | config 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 | ||
931 | config 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 | |
018a651a | 939 | <file:Documentation/laptops/sonypi.txt>, and say Y or M here. |
1da177e4 LT |
940 | |
941 | To compile this driver as a module, choose M here: the | |
942 | module will be called sonypi. | |
943 | ||
09762516 YY |
944 | config GPIO_TB0219 |
945 | tristate "TANBAC TB0219 GPIO support" | |
bef1f402 | 946 | depends on TANBAC_TB022X |
584e1236 | 947 | select GPIO_VR41XX |
1da177e4 | 948 | |
1da177e4 LT |
949 | source "drivers/char/pcmcia/Kconfig" |
950 | ||
951 | config 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 | ||
977 | config SCx200_GPIO | |
978 | tristate "NatSemi SCx200 GPIO Support" | |
979 | depends on SCx200 | |
7a8e2a5e | 980 | select NSC_GPIO |
1da177e4 LT |
981 | 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 | ||
7a8e2a5e JC |
987 | config 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 | ||
1000 | config NSC_GPIO | |
1001 | tristate "NatSemi Base GPIO Support" | |
699352c3 | 1002 | depends on X86_32 |
7a8e2a5e JC |
1003 | # 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 | ||
e329113c BG |
1010 | config 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 | ||
e400bae9 YY |
1019 | config GPIO_VR41XX |
1020 | tristate "NEC VR4100 series General-purpose I/O Unit support" | |
1021 | depends on CPU_VR41XX | |
1022 | ||
1da177e4 | 1023 | config RAW_DRIVER |
abd4aa5a | 1024 | tristate "RAW driver (/dev/raw/rawN)" |
9361401e | 1025 | depends on BLOCK |
1da177e4 | 1026 | help |
abd4aa5a DJ |
1027 | The raw driver permits block devices to be bound to /dev/raw/rawN. |
1028 | Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O. | |
1da177e4 LT |
1029 | See the raw(8) manpage for more details. |
1030 | ||
abd4aa5a | 1031 | Applications should preferably open the device (eg /dev/hda1) |
1da177e4 LT |
1032 | with the O_DIRECT flag. |
1033 | ||
0de502aa AM |
1034 | config MAX_RAW_DEVS |
1035 | int "Maximum number of RAW devices to support (1-8192)" | |
1036 | depends on RAW_DRIVER | |
1037 | default "256" | |
1038 | help | |
1039 | The maximum number of RAW devices that are supported. | |
1040 | Default is 256. Increase this number in case you need lots of | |
1041 | raw devices. | |
1042 | ||
1da177e4 LT |
1043 | config HPET |
1044 | bool "HPET - High Precision Event Timer" if (X86 || IA64) | |
1045 | default n | |
1046 | depends on ACPI | |
1047 | help | |
1048 | If you say Y here, you will have a miscdevice named "/dev/hpet/". Each | |
1049 | open selects one of the timers supported by the HPET. The timers are | |
3cb2fccc | 1050 | non-periodic and/or periodic. |
1da177e4 | 1051 | |
1da177e4 LT |
1052 | config HPET_MMAP |
1053 | bool "Allow mmap of HPET" | |
1054 | default y | |
1055 | depends on HPET | |
1056 | help | |
1057 | If you say Y here, user applications will be able to mmap | |
1058 | the HPET registers. | |
1059 | ||
1060 | In some hardware implementations, the page containing HPET | |
1061 | registers may also contain other things that shouldn't be | |
1062 | exposed to the user. If this applies to your hardware, | |
1063 | say N here. | |
1064 | ||
1da177e4 LT |
1065 | config HANGCHECK_TIMER |
1066 | tristate "Hangcheck timer" | |
abf3ea1b | 1067 | depends on X86 || IA64 || PPC64 || S390 |
1da177e4 LT |
1068 | help |
1069 | The hangcheck-timer module detects when the system has gone | |
1070 | out to lunch past a certain margin. It can reboot the system | |
1071 | or merely print a warning. | |
1072 | ||
1073 | config MMTIMER | |
1074 | tristate "MMTIMER Memory mapped RTC for SGI Altix" | |
1075 | depends on IA64_GENERIC || IA64_SGI_SN2 | |
1076 | default y | |
1077 | help | |
1078 | The mmtimer device allows direct userspace access to the | |
1079 | Altix system timer. | |
1080 | ||
1081 | source "drivers/char/tpm/Kconfig" | |
1082 | ||
1a80ba88 | 1083 | config TELCLOCK |
03154a27 | 1084 | tristate "Telecom clock driver for ATCA SBC" |
4d99bfac | 1085 | depends on EXPERIMENTAL && X86 |
1a80ba88 MG |
1086 | default n |
1087 | help | |
03154a27 MG |
1088 | The telecom clock device is specific to the MPCBL0010 and MPCBL0050 |
1089 | ATCA computers and allows direct userspace access to the | |
1090 | configuration of the telecom clock configuration settings. This | |
1091 | device is used for hardware synchronization across the ATCA backplane | |
1092 | fabric. Upon loading, the driver exports a sysfs directory, | |
1093 | /sys/devices/platform/telco_clock, with a number of files for | |
1094 | controlling the behavior of this hardware. | |
1a80ba88 | 1095 | |
4f911d64 RK |
1096 | config DEVPORT |
1097 | bool | |
1098 | depends on !M68K | |
1099 | depends on ISA || PCI | |
1100 | default y | |
1101 | ||
61d48c2c MS |
1102 | source "drivers/s390/char/Kconfig" |
1103 | ||
1da177e4 LT |
1104 | endmenu |
1105 |