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1 # SPDX-License-Identifier: GPL-2.0
13 This selects whether you want to include the driver for the standard
17 serial mouse and don't intend to use their machine's standard serial
20 To compile this driver as a module, choose M here: the
23 non-standard serial ports, since the configuration information will
30 BTW2: If you intend to use a software modem (also called Winmodem)
35 modems and similar devices connecting to the standard serial ports.
42 In 3.7 we renamed 8250 to 8250_core by mistake, so now we have to
44 8250.nr_uarts=4. We now renamed the module back to 8250, but if
45 anybody noticed in 3.7 and changed their userspace we still have to
51 If you did not notice yet and/or you have userspace from pre-3.7, it
52 is safe (and recommended) to say N here.
59 This builds standard PNP serial support. You may be able to
78 capabilities of the Fintek F81216A LPC to 4 UART as well similar
93 If you say Y here, it will be possible to use a serial port as the
97 to that serial port.
103 your boot loader (grub or lilo or loadlin) about how to pass options
104 to the kernel at boot time.)
113 and it will switch to normal serial console when the corresponding
117 it will not only setup early console.
143 This builds standard PCI serial support. You may be able to
146 Note that serial ports on NetMos 9835 Multi-I/O cards are handled
169 Say Y here to enable support for 16-bit PCMCIA serial devices,
171 multi-function Ethernet/modem cards. (PCMCIA- or PC-cards are
172 credit-card size devices often used with laptops.)
174 To compile this driver as a module, choose M here: the
187 To compile this driver as a module, chose M here: the
196 Set this to the number of serial ports you want the driver
197 to support. This includes any ports discovered via ACPI or
198 PCI enumeration and any ports that may be added at run-time
199 via hot-plug, or any ISA multi-port serial cards.
202 int "Number of 8250/16550 serial ports to register at runtime"
207 Set this to the maximum number of serial ports you want
208 the kernel to register at boot time. This can be overridden
209 with the module parameter "nr_uarts", or boot-time parameter
216 If you wish to use any non-standard features of the standard "dumb"
221 Note that the answer to this question won't directly affect the
222 kernel: saying N will just cause the configurator to skip all
231 FourPort, Accent Async, Boca (read the Boca mini-HOWTO, available
233 serial port hardware which acts similar to standard serial port
235 say N here to save some memory. You can also say Y if you have an
239 # Multi-port serial cards
248 To compile this driver as a module, choose M here: the module
257 To compile this driver as a module, choose M here: the module
268 If you want to use the virtual UART (VUART) device on Aspeed
269 BMC platforms, enable this option. This enables the 16550A-
278 mini-HOWTO, available from <https://www.tldp.org/docs.html#howto>
280 To compile this driver as a module, choose M here: the module
291 To compile this driver as a module, choose M here: the module
300 To compile this driver as a module, choose M here: the module
309 Switch with serial port enabled and wish to enable 8250
311 will ensure to support baud rates upto 1.5Mpbs.
322 serial ports on the same board to share a single IRQ. To enable
329 Say Y here if you want the kernel to try to guess which IRQ
330 to use for your serial port.
332 This is considered unsafe; it is far better to configure the IRQ in
341 Say Y here if you have a IODATA RSA-DV II/S ISA card and
342 would like to use its >115kbps speeds.
343 You will need to provide module parameter "probe_rsa", or boot-time
356 system, say Y to this option. The driver can handle 1, 2, or 3 port
367 Registers are similar to 16650 registers,
374 Uses 8 times oversampling (compared to 16 times for 16650)
378 Missing receive time-out interrupt
388 Selecting this option enables a workaround for a break-detection
401 To compile this driver as a module, chose M here: the
460 which he wouldn't see otherwise. The getty has still to be configured
467 to keep this option enabled. Otherwise people might complain about a
469 they forgot to update the command line.
476 If you have a LPC18xx/43xx based board and want to use the
477 serial port, say Y to this option. If unsure, say Y.
484 If you have a Mediatek based board and want to use the
485 serial port, say Y to this option. If unsure, say N.
488 tristate "Support for UniPhier on-chip UART"
492 If you have a UniPhier based board and want to use the on-chip
493 serial ports, say Y to this option. If unsure, say N.
501 If you have a system using an Ingenic SoC and wish to make use of
502 its UARTs, say Y to this option. If unsure, say N.
516 - Intel Baytrail SoC
517 - Intel Braswell SoC
518 - Intel Quark X1000 SoC
522 tristate "Support for serial ports on Intel MID platforms"
550 applicable to both devicetree and legacy boards, and early console is
560 wish to enable 8250 serial driver for the Tegra serial interfaces.
567 If you have a Broadcom STB based board and want to use the
570 Y to this option. If unsure, say N.