1 # SPDX-License-Identifier: GPL-2.0
3 # Serial device configuration
11 depends on SERIAL_CORE
13 Support for early consoles with the earlycon parameter. This enables
14 the console before standard serial driver is probed. The console is
15 enabled when early_param is processed.
17 source "drivers/tty/serial/8250/Kconfig"
19 comment "Non-8250 serial port support"
21 config SERIAL_AMBA_PL010
22 tristate "ARM AMBA PL010 serial port support"
23 depends on ARM_AMBA || COMPILE_TEST
26 This selects the ARM(R) AMBA(R) PrimeCell PL010 UART. If you have
27 an Integrator/AP or Integrator/PP2 platform, or if you have a
28 Cirrus Logic EP93xx CPU, say Y or M here.
32 config SERIAL_AMBA_PL010_CONSOLE
33 bool "Support for console on AMBA serial port"
34 depends on SERIAL_AMBA_PL010=y
35 select SERIAL_CORE_CONSOLE
37 Say Y here if you wish to use an AMBA PrimeCell UART as the system
38 console (the system console is the device which receives all kernel
39 messages and warnings and which allows logins in single user mode).
41 Even if you say Y here, the currently visible framebuffer console
42 (/dev/tty0) will still be used as the system console by default, but
43 you can alter that using a kernel command line option such as
44 "console=ttyAM0". (Try "man bootparam" or see the documentation of
45 your boot loader (lilo or loadlin) about how to pass options to the
48 config SERIAL_AMBA_PL011
49 tristate "ARM AMBA PL011 serial port support"
53 This selects the ARM(R) AMBA(R) PrimeCell PL011 UART. If you have
54 an Integrator/PP2, Integrator/CP or Versatile platform, say Y or M
59 config SERIAL_AMBA_PL011_CONSOLE
60 bool "Support for console on AMBA serial port"
61 depends on SERIAL_AMBA_PL011=y
62 select SERIAL_CORE_CONSOLE
63 select SERIAL_EARLYCON
65 Say Y here if you wish to use an AMBA PrimeCell UART as the system
66 console (the system console is the device which receives all kernel
67 messages and warnings and which allows logins in single user mode).
69 Even if you say Y here, the currently visible framebuffer console
70 (/dev/tty0) will still be used as the system console by default, but
71 you can alter that using a kernel command line option such as
72 "console=ttyAMA0". (Try "man bootparam" or see the documentation of
73 your boot loader (lilo or loadlin) about how to pass options to the
76 config SERIAL_EARLYCON_ARM_SEMIHOST
77 bool "Early console using ARM semihosting"
78 depends on ARM64 || ARM
80 select SERIAL_CORE_CONSOLE
81 select SERIAL_EARLYCON
83 Support for early debug console using ARM semihosting. This enables
84 the console before standard serial driver is probed. This is enabled
85 with "earlycon=smh" on the kernel command line. The console is
86 enabled when early_param is processed.
88 config SERIAL_EARLYCON_RISCV_SBI
89 bool "Early console using RISC-V SBI"
90 depends on RISCV_SBI_V01
92 select SERIAL_CORE_CONSOLE
93 select SERIAL_EARLYCON
95 Support for early debug console using RISC-V SBI. This enables
96 the console before standard serial driver is probed. This is enabled
97 with "earlycon=sbi" on the kernel command line. The console is
98 enabled when early_param is processed.
100 config SERIAL_SB1250_DUART
101 tristate "BCM1xxx on-chip DUART serial support"
102 depends on SIBYTE_SB1xxx_SOC=y
106 Support for the asynchronous serial interface (DUART) included in
107 the BCM1250 and derived System-On-a-Chip (SOC) devices. Note that
108 the letter D in DUART stands for "dual", which is how the device
109 is implemented. Depending on the SOC configuration there may be
110 one or more DUARTs available of which all are handled.
112 If unsure, say Y. To compile this driver as a module, choose M here:
113 the module will be called sb1250-duart.
115 config SERIAL_SB1250_DUART_CONSOLE
116 bool "Support for console on a BCM1xxx DUART serial port"
117 depends on SERIAL_SB1250_DUART=y
118 select SERIAL_CORE_CONSOLE
121 If you say Y here, it will be possible to use a serial port as the
122 system console (the system console is the device which receives all
123 kernel messages and warnings and which allows logins in single user
129 bool "AT91 on-chip serial port support"
130 depends on COMMON_CLK
131 depends on ARCH_AT91 || COMPILE_TEST
133 select SERIAL_MCTRL_GPIO if GPIOLIB
134 select MFD_AT91_USART
136 This enables the driver for the on-chip UARTs of the Atmel
139 config SERIAL_ATMEL_CONSOLE
140 bool "Support for console on AT91 serial port"
141 depends on SERIAL_ATMEL=y
142 select SERIAL_CORE_CONSOLE
143 select SERIAL_EARLYCON
145 Say Y here if you wish to use an on-chip UART on a Atmel
146 AT91 processor as the system console (the system
147 console is the device which receives all kernel messages and
148 warnings and which allows logins in single user mode).
150 config SERIAL_ATMEL_PDC
151 bool "Support DMA transfers on AT91 serial port"
152 depends on SERIAL_ATMEL
155 Say Y here if you wish to use the PDC to do DMA transfers to
156 and from the Atmel AT91 serial port. In order to
157 actually use DMA transfers, make sure that the use_dma_tx
158 and use_dma_rx members in the atmel_uart_data struct is set
159 appropriately for each port.
161 Note that break and error handling currently doesn't work
162 properly when DMA is enabled. Make sure that ports where
163 this matters don't use DMA.
165 config SERIAL_ATMEL_TTYAT
166 bool "Install as device ttyATn instead of ttySn"
167 depends on SERIAL_ATMEL=y
169 Say Y here if you wish to have the internal AT91 UARTs
170 appear as /dev/ttyATn (major 204, minor starting at 154)
171 instead of the normal /dev/ttySn (major 4, minor starting at
172 64). This is necessary if you also want other UARTs, such as
173 external 8250/16C550 compatible UARTs.
174 The ttySn nodes are legally reserved for the 8250 serial driver
175 but are often misused by other serial drivers.
177 To use this, you should create suitable ttyATn device nodes in
178 /dev/, and pass "console=ttyATn" to the kernel.
180 Say Y if you have an external 8250/16C550 UART. If unsure, say N.
182 config SERIAL_KGDB_NMI
183 bool "Serial console over KGDB NMI debugger port"
184 depends on KGDB_SERIAL_CONSOLE
186 This special driver allows you to temporary use NMI debugger port
187 as a normal console (assuming that the port is attached to KGDB).
189 Unlike KDB's disable_nmi command, with this driver you are always
190 able to go back to the debugger using KGDB escape sequence ($3#33).
191 This is because this console driver processes the input in NMI
192 context, and thus is able to intercept the magic sequence.
194 Note that since the console interprets input and uses polling
195 communication methods, for things like PPP you still must fully
196 detach debugger port from the KGDB NMI (i.e. disable_nmi), and
202 tristate "Meson serial port support"
203 depends on ARCH_MESON || COMPILE_TEST
206 This enables the driver for the on-chip UARTs of the Amlogic
209 config SERIAL_MESON_CONSOLE
210 bool "Support for console on meson"
211 depends on SERIAL_MESON
212 select SERIAL_CORE_CONSOLE
213 select SERIAL_EARLYCON
215 Say Y here if you wish to use a Amlogic MesonX UART as the
216 system console (the system console is the device which
217 receives all kernel messages and warnings and which allows
218 logins in single user mode) as /dev/ttyAMLx.
220 config SERIAL_CLPS711X
221 tristate "CLPS711X serial port support"
222 depends on ARCH_CLPS711X || COMPILE_TEST
224 select SERIAL_MCTRL_GPIO if GPIOLIB
226 This enables the driver for the on-chip UARTs of the Cirrus
227 Logic EP711x/EP721x/EP731x processors.
229 config SERIAL_CLPS711X_CONSOLE
230 bool "Support for console on CLPS711X serial port"
231 depends on SERIAL_CLPS711X=y
232 select SERIAL_CORE_CONSOLE
234 Even if you say Y here, the currently visible virtual console
235 (/dev/tty0) will still be used as the system console by default, but
236 you can alter that using a kernel command line option such as
239 config SERIAL_SAMSUNG
240 tristate "Samsung SoC serial support"
241 depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || ARCH_APPLE || ARCH_ARTPEC || COMPILE_TEST
244 Support for the on-chip UARTs on the Samsung
245 S3C24xx/S3C64xx/S5Pv210/Exynos and Apple M1 SoCs, providing
246 /dev/ttySAC0, 1 and 2 (note, some machines may not provide all of
247 these ports, depending on how the serial port pins are configured.
248 Choose Y/M here only if you build for such SoC.
250 config SERIAL_SAMSUNG_UARTS_4
252 depends on SERIAL_SAMSUNG
253 default y if !(CPU_S3C2410 || CPU_S3C2412 || CPU_S3C2440 || CPU_S3C2442)
255 Internal node for the common case of 4 Samsung compatible UARTs
257 config SERIAL_SAMSUNG_UARTS
259 depends on SERIAL_SAMSUNG
260 default 4 if SERIAL_SAMSUNG_UARTS_4 || CPU_S3C2416
263 Select the number of available UART ports for the Samsung S3C
266 config SERIAL_SAMSUNG_CONSOLE
267 bool "Support for console on Samsung SoC serial port"
268 depends on SERIAL_SAMSUNG
269 select SERIAL_CORE_CONSOLE
270 select SERIAL_EARLYCON
272 Allow selection of the S3C24XX on-board serial ports for use as
275 Even if you say Y here, the currently visible virtual console
276 (/dev/tty0) will still be used as the system console by default, but
277 you can alter that using a kernel command line option such as
278 "console=ttySACx". (Try "man bootparam" or see the documentation of
279 your boot loader about how to pass options to the kernel at
283 tristate "NVIDIA Tegra20/30 SoC serial controller"
284 depends on (ARCH_TEGRA && TEGRA20_APB_DMA) || COMPILE_TEST
287 Support for the on-chip UARTs on the NVIDIA Tegra series SOCs
288 providing /dev/ttyTHS0, 1, 2, 3 and 4 (note, some machines may not
289 provide all of these ports, depending on how the serial port
290 are enabled). This driver uses the APB DMA to achieve higher baudrate
291 and better performance.
293 config SERIAL_TEGRA_TCU
294 tristate "NVIDIA Tegra Combined UART"
296 depends on (ARCH_TEGRA && TEGRA_HSP_MBOX) || COMPILE_TEST
299 Support for the mailbox-based TCU (Tegra Combined UART) serial port.
300 TCU is a virtual serial port that allows multiplexing multiple data
301 streams into a single hardware serial port.
303 config SERIAL_TEGRA_TCU_CONSOLE
304 bool "Support for console on a Tegra TCU serial port"
305 depends on SERIAL_TEGRA_TCU=y
306 select SERIAL_CORE_CONSOLE
309 If you say Y here, it will be possible to use a the Tegra TCU as the
310 system console (the system console is the device which receives all
311 kernel messages and warnings and which allows logins in single user
316 config SERIAL_MAX3100
317 tristate "MAX3100 support"
323 config SERIAL_MAX310X
324 tristate "MAX310X support"
325 depends on SPI_MASTER
327 select REGMAP_SPI if SPI_MASTER
328 select REGMAP_I2C if I2C
330 This selects support for an advanced UART from Maxim (Dallas).
331 Supported ICs are MAX3107, MAX3108, MAX3109, MAX14830.
332 Each IC contains 128 words each of receive and transmit FIFO
333 that can be controlled through I2C or high-speed SPI.
335 Say Y here if you want to support this ICs.
338 bool "DECstation DZ serial driver"
339 depends on MACH_DECSTATION && 32BIT
343 DZ11-family serial controllers for DECstations and VAXstations,
344 including the DC7085, M7814, and M7819.
346 config SERIAL_DZ_CONSOLE
347 bool "Support console on DECstation DZ serial driver"
348 depends on SERIAL_DZ=y
349 select SERIAL_CORE_CONSOLE
352 If you say Y here, it will be possible to use a serial port as the
353 system console (the system console is the device which receives all
354 kernel messages and warnings and which allows logins in single user
357 Note that the firmware uses ttyS3 as the serial console on
358 DECstations that use this driver.
363 tristate "DECstation Z85C30 serial support"
364 depends on MACH_DECSTATION
368 Support for the Zilog 85C350 serial communications controller used
369 for serial ports in newer DECstation systems. These include the
370 DECsystem 5900 and all models of the DECstation and DECsystem 5000
371 systems except from model 200.
373 If unsure, say Y. To compile this driver as a module, choose M here:
374 the module will be called zs.
376 config SERIAL_ZS_CONSOLE
377 bool "Support for console on a DECstation Z85C30 serial port"
378 depends on SERIAL_ZS=y
379 select SERIAL_CORE_CONSOLE
382 If you say Y here, it will be possible to use a serial port as the
383 system console (the system console is the device which receives all
384 kernel messages and warnings and which allows logins in single user
387 Note that the firmware uses ttyS1 as the serial console on the
388 Maxine and ttyS3 on the others using this driver.
393 tristate "DC21285 serial port support"
394 depends on FOOTBRIDGE
397 If you have a machine based on a 21285 (Footbridge) StrongARM(R)/
398 PCI bridge you can enable its onboard serial port by enabling this
401 config SERIAL_21285_CONSOLE
402 bool "Console on DC21285 serial port"
403 depends on SERIAL_21285=y
404 select SERIAL_CORE_CONSOLE
406 If you have enabled the serial port on the 21285 footbridge you can
407 make it the console by answering Y to this option.
409 Even if you say Y here, the currently visible virtual console
410 (/dev/tty0) will still be used as the system console by default, but
411 you can alter that using a kernel command line option such as
412 "console=ttyFB". (Try "man bootparam" or see the documentation of
413 your boot loader (lilo or loadlin) about how to pass options to the
414 kernel at boot time.)
417 bool "PXA serial port support (DEPRECATED)"
418 depends on ARCH_PXA || ARCH_MMP
420 select SERIAL_8250_PXA if SERIAL_8250=y
421 select SERIAL_PXA_NON8250 if !SERIAL_8250=y
423 If you have a machine based on an Intel XScale PXA2xx CPU you
424 can enable its onboard serial ports by enabling this option.
426 Unless you have a specific need, you should use SERIAL_8250_PXA
429 config SERIAL_PXA_NON8250
431 depends on !SERIAL_8250 || COMPILE_TEST
433 config SERIAL_PXA_CONSOLE
434 bool "Console on PXA serial port (DEPRECATED)"
435 depends on SERIAL_PXA
436 select SERIAL_CORE_CONSOLE
437 select SERIAL_8250_CONSOLE if SERIAL_8250=y
439 If you have enabled the serial port on the Intel XScale PXA
440 CPU you can make it the console by answering Y to this option.
442 Even if you say Y here, the currently visible virtual console
443 (/dev/tty0) will still be used as the system console by default, but
444 you can alter that using a kernel command line option such as
445 "console=ttySA0". (Try "man bootparam" or see the documentation of
446 your boot loader (lilo or loadlin) about how to pass options to the
447 kernel at boot time.)
449 Unless you have a specific need, you should use SERIAL_8250_PXA
450 and SERIAL_8250_CONSOLE instead of this.
453 bool "SA1100 serial port support"
454 depends on ARCH_SA1100
456 select SERIAL_MCTRL_GPIO if GPIOLIB
458 If you have a machine based on a SA1100/SA1110 StrongARM(R) CPU you
459 can enable its onboard serial port by enabling this option.
460 Please read <file:Documentation/arm/sa1100/serial_uart.rst> for further
463 config SERIAL_SA1100_CONSOLE
464 bool "Console on SA1100 serial port"
465 depends on SERIAL_SA1100
466 select SERIAL_CORE_CONSOLE
468 If you have enabled the serial port on the SA1100/SA1110 StrongARM
469 CPU you can make it the console by answering Y to this option.
471 Even if you say Y here, the currently visible virtual console
472 (/dev/tty0) will still be used as the system console by default, but
473 you can alter that using a kernel command line option such as
474 "console=ttySA0". (Try "man bootparam" or see the documentation of
475 your boot loader (lilo or loadlin) about how to pass options to the
476 kernel at boot time.)
479 tristate "IMX serial port support"
480 depends on ARCH_MXC || COMPILE_TEST
483 select SERIAL_MCTRL_GPIO if GPIOLIB
485 If you have a machine based on a Motorola IMX CPU you
486 can enable its onboard serial port by enabling this option.
488 config SERIAL_IMX_CONSOLE
489 tristate "Console on IMX serial port"
490 depends on SERIAL_IMX
491 select SERIAL_CORE_CONSOLE
493 If you have enabled the serial port on the Freescale IMX
494 CPU you can make it the console by answering Y/M to this option.
496 Even if you say Y/M here, the currently visible virtual console
497 (/dev/tty0) will still be used as the system console by default, but
498 you can alter that using a kernel command line option such as
499 "console=ttymxc0". (Try "man bootparam" or see the documentation of
500 your bootloader about how to pass options to the kernel at boot time.)
502 config SERIAL_IMX_EARLYCON
503 bool "Earlycon on IMX serial port"
504 depends on ARCH_MXC || COMPILE_TEST
507 select SERIAL_EARLYCON
508 select SERIAL_CORE_CONSOLE
509 default y if SERIAL_IMX_CONSOLE
511 If you have enabled the earlycon on the Freescale IMX
512 CPU you can make it the earlycon by answering Y to this option.
514 config SERIAL_UARTLITE
515 tristate "Xilinx uartlite serial port support"
519 Say Y here if you want to use the Xilinx uartlite serial controller.
521 To compile this driver as a module, choose M here: the
522 module will be called uartlite.
524 config SERIAL_UARTLITE_CONSOLE
525 bool "Support for console on Xilinx uartlite serial port"
526 depends on SERIAL_UARTLITE=y
527 select SERIAL_CORE_CONSOLE
528 select SERIAL_EARLYCON
530 Say Y here if you wish to use a Xilinx uartlite as the system
531 console (the system console is the device which receives all kernel
532 messages and warnings and which allows logins in single user mode).
534 config SERIAL_UARTLITE_NR_UARTS
535 int "Maximum number of uartlite serial ports"
536 depends on SERIAL_UARTLITE
540 Set this to the number of uartlites in your system, or the number
541 you think you might implement.
543 config SERIAL_SUNCORE
547 select SERIAL_CORE_CONSOLE
550 config SERIAL_SUNZILOG
551 tristate "Sun Zilog8530 serial support"
554 This driver supports the Zilog8530 serial ports found on many Sparc
555 systems. Say Y or M if you want to be able to these serial ports.
557 config SERIAL_SUNZILOG_CONSOLE
558 bool "Console on Sun Zilog8530 serial port"
559 depends on SERIAL_SUNZILOG=y
561 If you would like to be able to use the Zilog8530 serial port
562 on your Sparc system as the console, you can do so by answering
566 tristate "Sun SU serial support"
567 depends on SPARC && PCI
569 This driver supports the 8250 serial ports that run the keyboard and
570 mouse on (PCI) UltraSPARC systems. Say Y or M if you want to be able
571 to these serial ports.
573 config SERIAL_SUNSU_CONSOLE
574 bool "Console on Sun SU serial port"
575 depends on SERIAL_SUNSU=y
577 If you would like to be able to use the SU serial port
578 on your Sparc system as the console, you can do so by answering
582 tristate "Serial MUX support"
587 Saying Y here will enable the hardware MUX serial driver for
588 the Nova, K class systems and D class with a 'remote control card'.
589 The hardware MUX is not 8250/16550 compatible therefore the
590 /dev/ttyB0 device is shared between the Serial MUX and the PDC
591 software console. The following steps need to be completed to use
594 1. create the device entry (mknod /dev/ttyB0 c 11 0)
595 2. Edit the /etc/inittab to start a getty listening on /dev/ttyB0
596 3. Add device ttyB0 to /etc/securetty (if you want to log on as
597 root on this console.)
598 4. Change the kernel command console parameter to: console=ttyB0
600 config SERIAL_MUX_CONSOLE
601 bool "Support for console on serial MUX"
602 depends on SERIAL_MUX=y
603 select SERIAL_CORE_CONSOLE
607 bool "PDC software console support"
608 depends on PARISC && !SERIAL_MUX && VT
610 Saying Y here will enable the software based PDC console to be
611 used as the system console. This is useful for machines in
612 which the hardware based console has not been written yet. The
613 following steps must be completed to use the PDC console:
615 1. create the device entry (mknod /dev/ttyB0 c 11 0)
616 2. Edit the /etc/inittab to start a getty listening on /dev/ttyB0
617 3. Add device ttyB0 to /etc/securetty (if you want to log on as
618 root on this console.)
619 4. Change the kernel command console parameter to: console=ttyB0
622 tristate "Sun Siemens SAB82532 serial support"
623 depends on SPARC && PCI
625 This driver supports the Siemens SAB82532 DUSCC serial ports on newer
626 (PCI) UltraSPARC systems. Say Y or M if you want to be able to these
629 config SERIAL_SUNSAB_CONSOLE
630 bool "Console on Sun Siemens SAB82532 serial port"
631 depends on SERIAL_SUNSAB=y
633 If you would like to be able to use the SAB82532 serial port
634 on your Sparc system as the console, you can do so by answering
638 bool "Sun4v Hypervisor Console support"
641 This driver supports the console device found on SUN4V Sparc
642 systems. Say Y if you want to be able to use this device.
644 config SERIAL_IP22_ZILOG
645 tristate "SGI Zilog8530 serial support"
646 depends on SGI_HAS_ZILOG
649 This driver supports the Zilog8530 serial ports found on SGI
650 systems. Say Y or M if you want to be able to these serial ports.
652 config SERIAL_IP22_ZILOG_CONSOLE
653 bool "Console on SGI Zilog8530 serial port"
654 depends on SERIAL_IP22_ZILOG=y
655 select SERIAL_CORE_CONSOLE
658 tristate "SuperH SCI(F) serial port support"
659 depends on SUPERH || ARCH_RENESAS || COMPILE_TEST
661 select SERIAL_MCTRL_GPIO if GPIOLIB
663 config SERIAL_SH_SCI_NR_UARTS
664 int "Maximum number of SCI(F) serial ports" if EXPERT
667 depends on SERIAL_SH_SCI
668 default "10" if SUPERH
669 default "18" if ARCH_RENESAS
672 config SERIAL_SH_SCI_CONSOLE
673 bool "Support for console on SuperH SCI(F)" if EXPERT
674 depends on SERIAL_SH_SCI=y
675 select SERIAL_CORE_CONSOLE
678 config SERIAL_SH_SCI_EARLYCON
679 bool "Support for early console on SuperH SCI(F)" if EXPERT
680 depends on SERIAL_SH_SCI=y
681 select SERIAL_CORE_CONSOLE
682 select SERIAL_EARLYCON
685 config SERIAL_SH_SCI_DMA
686 bool "DMA support" if EXPERT
687 depends on SERIAL_SH_SCI && DMA_ENGINE
690 config SERIAL_HS_LPC32XX
691 tristate "LPC32XX high speed serial port support"
692 depends on ARCH_LPC32XX || COMPILE_TEST
696 Support for the LPC32XX high speed serial ports (up to 900kbps).
697 Those are UARTs completely different from the Standard UARTs on the
699 Choose M or Y here to build this driver.
701 config SERIAL_HS_LPC32XX_CONSOLE
702 bool "Enable LPC32XX high speed UART serial console"
703 depends on SERIAL_HS_LPC32XX=y
704 select SERIAL_CORE_CONSOLE
706 If you would like to be able to use one of the high speed serial
707 ports on the LPC32XX as the console, you can do so by answering
713 config SERIAL_CORE_CONSOLE
720 bool "Coldfire serial support"
724 This serial driver supports the Freescale Coldfire serial ports.
726 config SERIAL_MCF_BAUDRATE
727 int "Default baudrate for Coldfire serial ports"
728 depends on SERIAL_MCF
731 This setting lets you define what the default baudrate is for the
732 ColdFire serial ports. The usual default varies from board to board,
733 and this setting is a way of catering for that.
735 config SERIAL_MCF_CONSOLE
736 bool "Coldfire serial console support"
737 depends on SERIAL_MCF
738 select SERIAL_CORE_CONSOLE
740 Enable a ColdFire internal serial port to be the system console.
742 config SERIAL_PMACZILOG
743 tristate "Mac or PowerMac z85c30 ESCC support"
744 depends on (M68K && MAC) || PPC_PMAC
747 This driver supports the Zilog z85C30 serial ports found on
749 Say Y or M if you want to be able to these serial ports.
751 config SERIAL_PMACZILOG_TTYS
752 bool "Use ttySn device nodes for Zilog z85c30"
753 depends on SERIAL_PMACZILOG
755 The pmac_zilog driver for the z85C30 chip on many powermacs
756 historically used the device numbers for /dev/ttySn. The
757 8250 serial port driver also uses these numbers, which means
758 the two drivers being unable to coexist; you could not use
759 both z85C30 and 8250 type ports at the same time.
761 If this option is not selected, the pmac_zilog driver will
762 use the device numbers allocated for /dev/ttyPZn. This allows
763 the pmac_zilog and 8250 drivers to co-exist, but may cause
764 existing userspace setups to break. Programs that need to
765 access the built-in serial ports on powermacs will need to
766 be reconfigured to use /dev/ttyPZn instead of /dev/ttySn.
768 If you enable this option, any z85c30 ports in the system will
769 be registered as ttyS0 onwards as in the past, and you will be
770 unable to use the 8250 module for PCMCIA or other 16C550-style
773 Say N unless you need the z85c30 ports on your (Power)Mac
774 to appear as /dev/ttySn.
776 config SERIAL_PMACZILOG_CONSOLE
777 bool "Console on Mac or PowerMac z85c30 serial port"
778 depends on SERIAL_PMACZILOG=y
779 select SERIAL_CORE_CONSOLE
781 If you would like to be able to use the z85c30 serial port
782 on your (Power)Mac as the console, you can do so by answering
786 tristate "CPM SCC/SMC serial port support"
787 depends on CPM2 || CPM1 || (PPC32 && COMPILE_TEST)
790 This driver supports the SCC and SMC serial ports on Motorola
791 embedded PowerPC that contain a CPM1 (8xx) or CPM2 (8xxx)
793 config SERIAL_CPM_CONSOLE
794 bool "Support for console on CPM SCC/SMC serial port"
795 depends on SERIAL_CPM=y
796 select SERIAL_CORE_CONSOLE
798 Say Y here if you wish to use a SCC or SMC CPM UART as the system
799 console (the system console is the device which receives all kernel
800 messages and warnings and which allows logins in single user mode).
802 Even if you say Y here, the currently visible framebuffer console
803 (/dev/tty0) will still be used as the system console by default, but
804 you can alter that using a kernel command line option such as
805 "console=ttyCPM0". (Try "man bootparam" or see the documentation of
806 your boot loader (lilo or loadlin) about how to pass options to the
807 kernel at boot time.)
810 tristate "Microchip PIC32 serial support"
811 depends on MACH_PIC32 || (MIPS && COMPILE_TEST)
814 If you have a PIC32, this driver supports the serial ports.
816 Say Y or M to use PIC32 serial ports, otherwise say N. Note that
817 to use a serial port as a console, this must be included in kernel and
820 config SERIAL_PIC32_CONSOLE
821 bool "PIC32 serial console support"
822 depends on SERIAL_PIC32=y
823 select SERIAL_CORE_CONSOLE
825 If you have a PIC32, this driver supports the putting a console on one
828 Say Y to use the PIC32 console, otherwise say N.
830 config SERIAL_MPC52xx
831 tristate "Freescale MPC52xx/MPC512x family PSC serial support"
832 depends on PPC_MPC52xx || PPC_MPC512x
835 This driver supports MPC52xx and MPC512x PSC serial ports. If you would
836 like to use them, you must answer Y or M to this option. Note that
837 for use as console, it must be included in kernel and not as a
840 config SERIAL_MPC52xx_CONSOLE
841 bool "Console on a Freescale MPC52xx/MPC512x family PSC serial port"
842 depends on SERIAL_MPC52xx=y
843 select SERIAL_CORE_CONSOLE
845 Select this options if you'd like to use one of the PSC serial port
846 of the Freescale MPC52xx family as a console.
848 config SERIAL_MPC52xx_CONSOLE_BAUD
849 int "Freescale MPC52xx/MPC512x family PSC serial port baud"
850 depends on SERIAL_MPC52xx_CONSOLE=y
853 Select the MPC52xx console baud rate.
854 This value is only used if the bootloader doesn't pass in the
858 tristate "IBM Multiport Serial Adapter"
860 depends on PPC_PSERIES || COMPILE_TEST
864 This driver is for a family of multiport serial adapters
865 including 2 port RVX, 2 port internal modem, 4 port internal
866 modem and a split 1 port RVX and 1 port internal modem.
868 This driver can also be built as a module. If so, the module
872 bool "TMPTX39XX/49XX SIO support"
873 depends on HAS_TXX9_SERIAL
877 config HAS_TXX9_SERIAL
880 config SERIAL_TXX9_NR_UARTS
881 int "Maximum number of TMPTX39XX/49XX SIO ports"
882 depends on SERIAL_TXX9
885 config SERIAL_TXX9_CONSOLE
886 bool "TMPTX39XX/49XX SIO Console support"
887 depends on SERIAL_TXX9=y
888 select SERIAL_CORE_CONSOLE
890 config SERIAL_TXX9_STDSERIAL
891 bool "TX39XX/49XX SIO act as standard serial"
892 depends on !SERIAL_8250 && SERIAL_TXX9
895 tristate "Digi International NEO and Classic PCI Support"
899 This is a driver for Digi International's Neo and Classic series
900 of cards which provide multiple serial ports. You would need
901 something like this to connect more than two modems to your Linux
902 box, for instance in order to become a dial-in server. This driver
903 supports PCI boards only.
905 If you have a card like this, say Y here, otherwise say N.
907 To compile this driver as a module, choose M here: the
908 module will be called jsm.
911 tristate "MSM on-chip serial port support"
912 depends on ARCH_QCOM || COMPILE_TEST
915 config SERIAL_MSM_CONSOLE
916 bool "MSM serial console support"
917 depends on SERIAL_MSM=y
918 select SERIAL_CORE_CONSOLE
919 select SERIAL_EARLYCON
921 config SERIAL_QCOM_GENI
922 tristate "QCOM on-chip GENI based serial port support"
923 depends on ARCH_QCOM || COMPILE_TEST
924 depends on QCOM_GENI_SE
927 config SERIAL_QCOM_GENI_CONSOLE
928 bool "QCOM GENI Serial Console support"
929 depends on SERIAL_QCOM_GENI
930 select SERIAL_CORE_CONSOLE
931 select SERIAL_EARLYCON
933 Serial console driver for Qualcomm Technologies Inc's GENI based
937 bool "VIA VT8500 on-chip serial port support"
938 depends on ARCH_VT8500 || COMPILE_TEST
941 config SERIAL_VT8500_CONSOLE
942 bool "VIA VT8500 serial console support"
943 depends on SERIAL_VT8500=y
944 select SERIAL_CORE_CONSOLE
947 tristate "OMAP serial port support"
948 depends on (ARCH_OMAP2PLUS && !SERIAL_8250_OMAP) || COMPILE_TEST
951 If you have a machine based on an Texas Instruments OMAP CPU you
952 can enable its onboard serial ports by enabling this option.
954 By enabling this option you take advantage of dma feature available
955 with the omap-serial driver. DMA support can be enabled from platform
958 config SERIAL_OMAP_CONSOLE
959 bool "Console on OMAP serial port"
960 depends on SERIAL_OMAP=y
961 select SERIAL_CORE_CONSOLE
963 Select this option if you would like to use omap serial port as
966 Even if you say Y here, the currently visible virtual console
967 (/dev/tty0) will still be used as the system console by default, but
968 you can alter that using a kernel command line option such as
969 "console=ttyOx". (Try "man bootparam" or see the documentation of
970 your boot loader about how to pass options to the kernel at
974 tristate "SiFive UART support"
978 Select this option if you are building a kernel for a device that
979 contains a SiFive UART IP block. This type of UART is present on
980 SiFive FU540 SoCs, among others.
982 config SERIAL_SIFIVE_CONSOLE
983 bool "Console on SiFive UART"
984 depends on SERIAL_SIFIVE=y
985 select SERIAL_CORE_CONSOLE
986 select SERIAL_EARLYCON
988 Select this option if you would like to use a SiFive UART as the
991 Even if you say Y here, the currently visible virtual console
992 (/dev/tty0) will still be used as the system console by default, but
993 you can alter that using a kernel command line option such as
994 "console=ttySIFx". (Try "man bootparam" or see the documentation of
995 your boot loader about how to pass options to the kernel at
999 tristate "Lantiq serial driver"
1000 depends on (LANTIQ || X86) || COMPILE_TEST
1003 Support for UART on Lantiq and Intel SoCs.
1004 To compile this driver as a module, select M here. The
1005 module will be called lantiq.
1007 config SERIAL_LANTIQ_CONSOLE
1008 bool "Console on Lantiq UART"
1009 depends on SERIAL_LANTIQ=y
1010 select SERIAL_CORE_CONSOLE
1011 select SERIAL_EARLYCON
1013 Select this option if you would like to use a Lantiq UART as the
1017 tristate "Freescale QUICC Engine serial port support"
1018 depends on QUICC_ENGINE
1022 This driver supports the QE serial ports on Freescale embedded
1023 PowerPC that contain a QUICC Engine.
1025 config SERIAL_SCCNXP
1026 tristate "SCCNXP serial port support"
1029 This selects support for an advanced UART from NXP (Philips).
1030 Supported ICs are SCC2681, SCC2691, SCC2692, SC28L91, SC28L92,
1031 SC28L202, SCC68681 and SCC68692.
1033 config SERIAL_SCCNXP_CONSOLE
1034 bool "Console on SCCNXP serial port"
1035 depends on SERIAL_SCCNXP=y
1036 select SERIAL_CORE_CONSOLE
1038 Support for console on SCCNXP serial ports.
1040 config SERIAL_SC16IS7XX_CORE
1043 config SERIAL_SC16IS7XX
1044 tristate "SC16IS7xx serial support"
1046 depends on (SPI_MASTER && !I2C) || I2C
1048 This selects support for SC16IS7xx serial ports.
1049 Supported ICs are SC16IS740, SC16IS741, SC16IS750, SC16IS752,
1050 SC16IS760 and SC16IS762. Select supported buses using options below.
1052 config SERIAL_SC16IS7XX_I2C
1053 bool "SC16IS7xx for I2C interface"
1054 depends on SERIAL_SC16IS7XX
1056 select SERIAL_SC16IS7XX_CORE if SERIAL_SC16IS7XX
1057 select REGMAP_I2C if I2C
1060 Enable SC16IS7xx driver on I2C bus,
1061 If required say y, and say n to i2c if not required,
1062 Enabled by default to support oldconfig.
1063 You must select at least one bus for the driver to be built.
1065 config SERIAL_SC16IS7XX_SPI
1066 bool "SC16IS7xx for spi interface"
1067 depends on SERIAL_SC16IS7XX
1068 depends on SPI_MASTER
1069 select SERIAL_SC16IS7XX_CORE if SERIAL_SC16IS7XX
1070 select REGMAP_SPI if SPI_MASTER
1072 Enable SC16IS7xx driver on SPI bus,
1073 If required say y, and say n to spi if not required,
1074 This is additional support to existing driver.
1075 You must select at least one bus for the driver to be built.
1077 config SERIAL_TIMBERDALE
1078 tristate "Support for timberdale UART"
1080 depends on X86_32 || COMPILE_TEST
1082 Add support for UART controller on timberdale.
1084 config SERIAL_BCM63XX
1085 tristate "Broadcom BCM63xx/BCM33xx UART support"
1087 depends on ARCH_BCMBCA || BCM63XX || BMIPS_GENERIC || COMPILE_TEST
1088 default ARCH_BCMBCA || BCM63XX || BMIPS_GENERIC
1090 This enables the driver for the onchip UART core found on
1091 the following chipsets:
1093 BCM33xx (cable modem)
1094 BCM63xx/BCM63xxx (DSL)
1096 BCM7xxx (STB) - DOCSIS console
1098 config SERIAL_BCM63XX_CONSOLE
1099 bool "Console on BCM63xx serial port"
1100 depends on SERIAL_BCM63XX=y
1101 select SERIAL_CORE_CONSOLE
1102 select SERIAL_EARLYCON
1104 If you have enabled the serial port on the BCM63xx CPU
1105 you can make it the console by answering Y to this option.
1107 config SERIAL_GRLIB_GAISLER_APBUART
1108 tristate "GRLIB APBUART serial support"
1109 depends on OF && SPARC
1112 Add support for the GRLIB APBUART serial port.
1114 config SERIAL_GRLIB_GAISLER_APBUART_CONSOLE
1115 bool "Console on GRLIB APBUART serial port"
1116 depends on SERIAL_GRLIB_GAISLER_APBUART=y
1117 select SERIAL_CORE_CONSOLE
1119 Support for running a console on the GRLIB APBUART
1121 config SERIAL_ALTERA_JTAGUART
1122 tristate "Altera JTAG UART support"
1125 This driver supports the Altera JTAG UART port.
1127 config SERIAL_ALTERA_JTAGUART_CONSOLE
1128 bool "Altera JTAG UART console support"
1129 depends on SERIAL_ALTERA_JTAGUART=y
1130 select SERIAL_CORE_CONSOLE
1131 select SERIAL_EARLYCON
1133 Enable a Altera JTAG UART port to be the system console.
1135 config SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS
1136 bool "Bypass output when no connection"
1137 depends on SERIAL_ALTERA_JTAGUART_CONSOLE
1138 select SERIAL_CORE_CONSOLE
1140 Bypass console output and keep going even if there is no
1141 JTAG terminal connection with the host.
1143 config SERIAL_ALTERA_UART
1144 tristate "Altera UART support"
1147 This driver supports the Altera softcore UART port.
1149 config SERIAL_ALTERA_UART_MAXPORTS
1150 int "Maximum number of Altera UART ports"
1151 depends on SERIAL_ALTERA_UART
1154 This setting lets you define the maximum number of the Altera
1155 UART ports. The usual default varies from board to board, and
1156 this setting is a way of catering for that.
1158 config SERIAL_ALTERA_UART_BAUDRATE
1159 int "Default baudrate for Altera UART ports"
1160 depends on SERIAL_ALTERA_UART
1163 This setting lets you define what the default baudrate is for the
1164 Altera UART ports. The usual default varies from board to board,
1165 and this setting is a way of catering for that.
1167 config SERIAL_ALTERA_UART_CONSOLE
1168 bool "Altera UART console support"
1169 depends on SERIAL_ALTERA_UART=y
1170 select SERIAL_CORE_CONSOLE
1171 select SERIAL_EARLYCON
1173 Enable a Altera UART port to be the system console.
1175 config SERIAL_PCH_UART
1176 tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) UART"
1177 depends on PCI && (X86_32 || MIPS || COMPILE_TEST)
1180 This driver is for PCH(Platform controller Hub) UART of Intel EG20T
1181 which is an IOH(Input/Output Hub) for x86 embedded processor.
1182 Enabling PCH_DMA, this PCH UART works as DMA mode.
1184 This driver also can be used for LAPIS Semiconductor IOH(Input/
1185 Output Hub), ML7213, ML7223 and ML7831.
1186 ML7213 IOH is for IVI(In-Vehicle Infotainment) use, ML7223 IOH is
1187 for MP(Media Phone) use and ML7831 IOH is for general purpose use.
1188 ML7213/ML7223/ML7831 is companion chip for Intel Atom E6xx series.
1189 ML7213/ML7223/ML7831 is completely compatible for Intel EG20T PCH.
1191 config SERIAL_PCH_UART_CONSOLE
1192 bool "Support for console on Intel EG20T PCH UART/OKI SEMICONDUCTOR ML7213 IOH"
1193 depends on SERIAL_PCH_UART=y
1194 select SERIAL_CORE_CONSOLE
1196 Say Y here if you wish to use the PCH UART as the system console
1197 (the system console is the device which receives all kernel messages and
1198 warnings and which allows logins in single user mode).
1200 config SERIAL_MXS_AUART
1201 tristate "MXS AUART support"
1202 depends on ARCH_MXS || MACH_ASM9260 || COMPILE_TEST
1204 select SERIAL_MCTRL_GPIO if GPIOLIB
1206 This driver supports the MXS and Alphascale ASM9260 Application
1209 config SERIAL_MXS_AUART_CONSOLE
1210 bool "MXS AUART console support"
1211 depends on SERIAL_MXS_AUART=y
1212 select SERIAL_CORE_CONSOLE
1214 Enable a MXS AUART port to be the system console.
1216 config SERIAL_XILINX_PS_UART
1217 tristate "Cadence (Xilinx Zynq) UART support"
1221 This driver supports the Cadence UART. It is found e.g. in Xilinx
1224 config SERIAL_XILINX_PS_UART_CONSOLE
1225 bool "Cadence UART console support"
1226 depends on SERIAL_XILINX_PS_UART=y
1227 select SERIAL_CORE_CONSOLE
1228 select SERIAL_EARLYCON
1230 Enable a Cadence UART port to be the system console.
1232 config SERIAL_AR933X
1233 tristate "AR933X serial port support"
1234 depends on (HAVE_CLK && ATH79) || (MIPS && COMPILE_TEST)
1236 select SERIAL_MCTRL_GPIO if GPIOLIB
1238 If you have an Atheros AR933X SOC based board and want to use the
1239 built-in UART of the SoC, say Y to this option.
1241 To compile this driver as a module, choose M here: the
1242 module will be called ar933x_uart.
1244 config SERIAL_AR933X_CONSOLE
1245 bool "Console on AR933X serial port"
1246 depends on SERIAL_AR933X=y
1247 select SERIAL_CORE_CONSOLE
1249 Enable a built-in UART port of the AR933X to be the system console.
1251 config SERIAL_AR933X_NR_UARTS
1252 int "Maximum number of AR933X serial ports"
1253 depends on SERIAL_AR933X
1256 Set this to the number of serial ports you want the driver
1259 config SERIAL_MPS2_UART_CONSOLE
1260 bool "MPS2 UART console support"
1261 depends on SERIAL_MPS2_UART
1262 select SERIAL_CORE_CONSOLE
1263 select SERIAL_EARLYCON
1265 config SERIAL_MPS2_UART
1266 bool "MPS2 UART port"
1267 depends on ARCH_MPS2 || COMPILE_TEST
1270 This driver support the UART ports on ARM MPS2.
1273 tristate "ARC UART driver support"
1276 Driver for on-chip UART for ARC(Synopsys) for the legacy
1277 FPGA Boards (ML50x/ARCAngel4)
1279 config SERIAL_ARC_CONSOLE
1280 bool "Console on ARC UART"
1281 depends on SERIAL_ARC=y
1282 select SERIAL_CORE_CONSOLE
1283 select SERIAL_EARLYCON
1285 Enable system Console on ARC UART
1287 config SERIAL_ARC_NR_PORTS
1288 int "Number of ARC UART ports"
1289 depends on SERIAL_ARC
1293 Set this to the number of serial ports you want the driver
1297 tristate "Comtrol RocketPort EXPRESS/INFINITY support"
1301 This driver supports the Comtrol RocketPort EXPRESS and
1302 RocketPort INFINITY families of PCI/PCIe multiport serial adapters.
1303 These adapters use a "RocketPort 2" ASIC that is not compatible
1304 with the original RocketPort driver (CONFIG_ROCKETPORT).
1306 To compile this driver as a module, choose M here: the
1307 module will be called rp2.
1309 If you want to compile this driver into the kernel, say Y here. If
1310 you don't have a suitable RocketPort card installed, say N.
1312 config SERIAL_RP2_NR_UARTS
1313 int "Maximum number of RocketPort EXPRESS/INFINITY ports"
1314 depends on SERIAL_RP2
1317 If multiple cards are present, the default limit of 32 ports may
1318 need to be increased.
1320 config SERIAL_FSL_LPUART
1321 tristate "Freescale lpuart serial port support"
1325 Support for the on-chip lpuart on some Freescale SOCs.
1327 config SERIAL_FSL_LPUART_CONSOLE
1328 bool "Console on Freescale lpuart serial port"
1329 depends on SERIAL_FSL_LPUART
1330 select SERIAL_CORE_CONSOLE
1331 select SERIAL_EARLYCON
1333 If you have enabled the lpuart serial port on the Freescale SoCs,
1334 you can make it the console by answering Y to this option.
1336 config SERIAL_FSL_LINFLEXUART
1337 tristate "Freescale LINFlexD UART serial port support"
1341 Support for the on-chip LINFlexD UART on some Freescale SOCs.
1343 config SERIAL_FSL_LINFLEXUART_CONSOLE
1344 bool "Console on Freescale LINFlexD UART serial port"
1345 depends on SERIAL_FSL_LINFLEXUART=y
1346 select SERIAL_CORE_CONSOLE
1347 select SERIAL_EARLYCON
1349 If you have enabled the LINFlexD UART serial port on the Freescale
1350 SoCs, you can make it the console by answering Y to this option.
1352 config SERIAL_CONEXANT_DIGICOLOR
1353 tristate "Conexant Digicolor CX92xxx USART serial port support"
1357 Support for the on-chip USART on Conexant Digicolor SoCs.
1359 config SERIAL_CONEXANT_DIGICOLOR_CONSOLE
1360 bool "Console on Conexant Digicolor serial port"
1361 depends on SERIAL_CONEXANT_DIGICOLOR=y
1362 select SERIAL_CORE_CONSOLE
1364 If you have enabled the USART serial port on Conexant Digicolor
1365 SoCs, you can make it the console by answering Y to this option.
1367 config SERIAL_ST_ASC
1368 tristate "ST ASC serial port support"
1370 depends on ARM || COMPILE_TEST
1372 This driver is for the on-chip Asynchronous Serial Controller on
1373 STMicroelectronics STi SoCs.
1374 ASC is embedded in ST COMMS IP block. It supports Rx & Tx functionality.
1375 It support all industry standard baud rates.
1379 config SERIAL_ST_ASC_CONSOLE
1380 bool "Support for console on ST ASC"
1381 depends on SERIAL_ST_ASC=y
1382 select SERIAL_CORE_CONSOLE
1384 config SERIAL_MEN_Z135
1385 tristate "MEN 16z135 Support"
1389 Say yes here to enable support for the MEN 16z135 High Speed UART IP-Core
1392 This driver can also be build as a module. If so, the module will be called
1396 tristate "Support for Spreadtrum serial"
1398 depends on COMMON_CLK
1400 This enables the driver for the Spreadtrum's serial.
1402 config SERIAL_SPRD_CONSOLE
1403 bool "Spreadtrum UART console support"
1404 depends on SERIAL_SPRD=y
1405 select SERIAL_CORE_CONSOLE
1406 select SERIAL_EARLYCON
1408 Support for early debug console using Spreadtrum's serial. This enables
1409 the console before standard serial driver is probed. This is enabled
1410 with "earlycon" on the kernel command line. The console is
1411 enabled when early_param is processed.
1414 tristate "STMicroelectronics STM32 serial port support"
1416 depends on ARCH_STM32 || COMPILE_TEST
1417 select SERIAL_MCTRL_GPIO if GPIOLIB
1419 This driver is for the on-chip Serial Controller on
1420 STMicroelectronics STM32 MCUs.
1421 USART supports Rx & Tx functionality.
1422 It support all industry standard baud rates.
1426 config SERIAL_STM32_CONSOLE
1427 bool "Support for console on STM32"
1428 depends on SERIAL_STM32=y
1429 select SERIAL_CORE_CONSOLE
1430 select SERIAL_EARLYCON
1432 config SERIAL_MVEBU_UART
1433 bool "Marvell EBU serial port support"
1434 depends on ARCH_MVEBU || COMPILE_TEST
1435 depends on COMMON_CLK
1438 This driver is for Marvell EBU SoC's UART. If you have a machine
1439 based on the Armada-3700 SoC and wish to use the on-board serial
1444 config SERIAL_MVEBU_CONSOLE
1445 bool "Console on Marvell EBU serial port"
1446 depends on SERIAL_MVEBU_UART
1447 select SERIAL_CORE_CONSOLE
1448 select SERIAL_EARLYCON
1451 Say 'Y' here if you wish to use Armada-3700 UART as the system console.
1452 (the system console is the device which receives all kernel messages
1453 and warnings and which allows logins in single user mode)
1457 tristate "Actions Semi Owl serial port support"
1458 depends on ARCH_ACTIONS || COMPILE_TEST
1461 This driver is for Actions Semiconductor S500/S900 SoC's UART.
1462 Say 'Y' here if you wish to use the on-board serial port.
1465 config SERIAL_OWL_CONSOLE
1466 bool "Console on Actions Semi Owl serial port"
1467 depends on SERIAL_OWL=y
1468 select SERIAL_CORE_CONSOLE
1469 select SERIAL_EARLYCON
1472 Say 'Y' here if you wish to use Actions Semiconductor S500/S900 UART
1473 as the system console.
1476 bool "RDA Micro serial port support"
1477 depends on ARCH_RDA || COMPILE_TEST
1480 This driver is for RDA8810PL SoC's UART.
1481 Say 'Y' here if you wish to use the on-board serial port.
1484 config SERIAL_RDA_CONSOLE
1485 bool "Console on RDA Micro serial port"
1486 depends on SERIAL_RDA=y
1487 select SERIAL_CORE_CONSOLE
1488 select SERIAL_EARLYCON
1491 Say 'Y' here if you wish to use the RDA8810PL UART as the system
1492 console. Only earlycon is implemented currently.
1494 config SERIAL_MILBEAUT_USIO
1495 tristate "Milbeaut USIO/UART serial port support"
1496 depends on ARCH_MILBEAUT || (COMPILE_TEST && OF)
1497 default ARCH_MILBEAUT
1500 This selects the USIO/UART IP found in Socionext Milbeaut SoCs.
1502 config SERIAL_MILBEAUT_USIO_PORTS
1503 int "Maximum number of CSIO/UART ports (1-8)"
1505 depends on SERIAL_MILBEAUT_USIO
1508 config SERIAL_MILBEAUT_USIO_CONSOLE
1509 bool "Support for console on MILBEAUT USIO/UART serial port"
1510 depends on SERIAL_MILBEAUT_USIO=y
1512 select SERIAL_CORE_CONSOLE
1513 select SERIAL_EARLYCON
1515 Say 'Y' here if you wish to use a USIO/UART of Socionext Milbeaut
1516 SoCs as the system console (the system console is the device which
1517 receives all kernel messages and warnings and which allows logins in
1520 config SERIAL_LITEUART
1521 tristate "LiteUART serial port support"
1522 depends on HAS_IOMEM
1523 depends on OF || COMPILE_TEST
1524 depends on LITEX || COMPILE_TEST
1527 This driver is for the FPGA-based LiteUART serial controller from LiteX
1530 Say 'Y' or 'M' here if you wish to use the LiteUART serial controller.
1533 config SERIAL_LITEUART_MAX_PORTS
1534 int "Maximum number of LiteUART ports"
1535 depends on SERIAL_LITEUART
1538 Set this to the maximum number of serial ports you want the driver
1541 config SERIAL_LITEUART_CONSOLE
1542 bool "LiteUART serial port console support"
1543 depends on SERIAL_LITEUART=y
1544 select SERIAL_CORE_CONSOLE
1545 select SERIAL_EARLYCON
1547 Say 'Y' or 'M' here if you wish to use the FPGA-based LiteUART serial
1548 controller from LiteX SoC builder as the system console
1549 (the system console is the device which receives all kernel messages
1550 and warnings and which allows logins in single user mode).
1553 config SERIAL_SUNPLUS
1554 tristate "Sunplus UART support"
1555 depends on ARCH_SUNPLUS || COMPILE_TEST
1558 Select this option if you would like to use Sunplus serial port on
1560 If you enable this option, Sunplus serial ports in the system will
1561 be registered as ttySUPx.
1562 This driver can also be built as a module. If so, the module will be
1563 called sunplus-uart.
1565 config SERIAL_SUNPLUS_CONSOLE
1566 bool "Console on Sunplus UART"
1567 depends on SERIAL_SUNPLUS
1568 select SERIAL_CORE_CONSOLE
1569 select SERIAL_EARLYCON
1571 Select this option if you would like to use a Sunplus UART as the
1573 Even if you say Y here, the currently visible virtual console
1574 (/dev/tty0) will still be used as the system console by default, but
1575 you can alter that using a kernel command line option such as
1580 config SERIAL_MCTRL_GPIO