2 # Serial device configuration
9 Enable support for serial drivers. This allows use of a serial UART
10 for displaying messages while U-Boot is running. It also brings in
11 printf() and panic() functions. This should normally be enabled
12 unless there are space reasons not to. If you just need to disable
13 the console you can adjust the stdout environment variable or use
19 int "Default baudrate"
22 Select a default baudrate, where "default" has a driver-specific
23 meaning of either setting the baudrate for the early debug UART
24 in the SPL stage (most drivers) or for choosing a default baudrate
25 in the absence of an environment setting (serial_mxc.c).
27 config REQUIRE_SERIAL_CONSOLE
28 bool "Require a serial port for console"
29 # Running without a serial console is not supported by the
34 Require a serial port for the console, and panic if none is found
35 during serial port initialization (default y). Set this to n on
36 boards which have no debug serial port whatsoever.
38 config SPECIFY_CONSOLE_INDEX
39 bool "Specify the port number used for console"
40 default y if !DM_SERIAL || (SPL && !SPL_DM_SERIAL) || \
41 (TPL && !TPL_DM_SERIAL)
43 In various cases, we need to specify which of the UART devices that
44 a board or SoC has available are to be used for the console device
48 bool "Provide a serial driver"
52 In very space-constrained devices even the full UART driver is too
53 large. In this case the debug UART can still be used in some cases.
54 This option enables the full UART in U-Boot, so if is it disabled,
55 the full UART driver will be omitted, thus saving space.
57 config SPL_SERIAL_PRESENT
58 bool "Provide a serial driver in SPL"
59 depends on DM_SERIAL && SPL
62 In very space-constrained devices even the full UART driver is too
63 large. In this case the debug UART can still be used in some cases.
64 This option enables the full UART in SPL, so if is it disabled,
65 the full UART driver will be omitted, thus saving space.
67 config TPL_SERIAL_PRESENT
68 bool "Provide a serial driver in TPL"
69 depends on DM_SERIAL && TPL
72 In very space-constrained devices even the full UART driver is too
73 large. In this case the debug UART can still be used in some cases.
74 This option enables the full UART in TPL, so if is it disabled,
75 the full UART driver will be omitted, thus saving space.
77 config VPL_SERIAL_PRESENT
78 bool "Provide a serial driver in VPL"
79 depends on DM_SERIAL && VPL
82 In very space-constrained devices even the full UART driver is too
83 large. In this case the debug UART can still be used in some cases.
84 This option enables the full UART in TPL, so if is it disabled,
85 the full UART driver will be omitted, thus saving space.
88 int "UART used for console"
89 depends on SPECIFY_CONSOLE_INDEX
93 Set this to match the UART number of the serial console.
96 bool "Enable Driver Model for serial drivers"
100 Enable driver model for serial. This replaces
101 drivers/serial/serial.c with the serial uclass, which
102 implements serial_putc() etc. The uclass interface is
103 defined in include/serial.h.
105 config SERIAL_RX_BUFFER
106 bool "Enable RX buffer for serial input"
109 Enable RX buffer support for the serial driver. This enables
110 pasting longer strings, even when the RX FIFO of the UART is
111 not big enough (e.g. 16 bytes on the normal NS16550).
113 config SERIAL_RX_BUFFER_SIZE
115 depends on SERIAL_RX_BUFFER
118 The size of the RX buffer (needs to be power of 2)
121 bool "Enable printing strings all at once"
124 Some serial drivers are much more efficient when printing multiple
125 characters at once rather than printing characters individually. This
126 can be because they can load a fifo, or because individual print
127 calls have a constant overhead. With this option set, the serial
128 subsystem will try to provide serial drivers with as many characters
129 at once as possible, instead of printing characters one by one. Most
130 serial drivers do not need this config to print efficiently. If
133 config SERIAL_SEARCH_ALL
134 bool "Search for serial devices after default one failed"
137 The serial subsystem only searches for a single serial device
138 that was instantiated, but does not check whether it was probed
139 correctly. With this option set, we make successful probing
140 mandatory and search for fallback serial devices if the default
141 device does not work.
145 config SERIAL_PROBE_ALL
146 bool "Probe all available serial devices"
149 The serial subsystem only probes for a single serial device,
150 but does not probe for other remaining serial devices.
151 With this option set, we make probing and searching for
152 all available devices optional.
153 Normally, U-Boot talks to one serial port at a time, but SBSA
154 compliant UART devices like PL011 require initialization
155 by firmware and to let the kernel use serial port for sending
156 and receiving the characters.
161 bool "Enable Driver Model for serial drivers in SPL"
162 depends on DM_SERIAL && SPL_DM
163 select SYS_SPL_MALLOC_F
166 Enable driver model for serial in SPL. This replaces
167 drivers/serial/serial.c with the serial uclass, which
168 implements serial_putc() etc. The uclass interface is
169 defined in include/serial.h.
172 bool "Enable Driver Model for serial drivers in TPL"
173 depends on DM_SERIAL && TPL_DM
174 select SYS_TPL_MALLOC_F
175 default y if TPL && DM_SERIAL
177 Enable driver model for serial in TPL. This replaces
178 drivers/serial/serial.c with the serial uclass, which
179 implements serial_putc() etc. The uclass interface is
180 defined in include/serial.h.
183 bool "Enable Driver Model for serial drivers in VPL"
185 default y if VPL && DM_SERIAL
187 Enable driver model for serial in VPL. This replaces
188 drivers/serial/serial.c with the serial uclass, which
189 implements serial_putc() etc. The uclass interface is
190 defined in include/serial.h.
193 bool "Enable an early debug UART for debugging"
195 The debug UART is intended for use very early in U-Boot to debug
196 problems when an ICE or other debug mechanism is not available.
198 To use it you should:
199 - Make sure your UART supports this interface
200 - Enable CONFIG_DEBUG_UART
201 - Enable the CONFIG for your UART to tell it to provide this interface
202 (e.g. CONFIG_DEBUG_UART_NS16550)
203 - Define the required settings as needed (see below)
204 - Call debug_uart_init() before use
205 - Call debug_uart_putc() to output a character
207 Depending on your platform it may be possible to use this UART before
208 a stack is available.
210 If your UART does not support this interface you can probably add
211 support quite easily. Remember that you cannot use driver model and
212 it is preferred to use no stack.
214 You must not use this UART once driver model is working and the
215 serial drivers are up and running (done in serial_init()). Otherwise
216 the drivers may conflict and you will get strange output.
219 prompt "Select which UART will provide the debug UART"
220 depends on DEBUG_UART
221 default DEBUG_UART_NS16550
223 config DEBUG_UART_ALTERA_JTAGUART
224 bool "Altera JTAG UART"
225 depends on ALTERA_JTAG_UART
227 Select this to enable a debug UART using the altera_jtag_uart driver.
228 You will need to provide parameters to make this work. The driver will
229 be available until the real driver model serial is running.
231 config DEBUG_UART_ALTERA_UART
233 depends on ALTERA_UART
235 Select this to enable a debug UART using the altera_uart driver.
236 You will need to provide parameters to make this work. The driver will
237 be available until the real driver model serial is running.
239 config DEBUG_UART_AR933X
240 bool "QCA/Atheros ar933x"
241 depends on AR933X_UART
243 Select this to enable a debug UART using the ar933x uart driver.
244 You will need to provide parameters to make this work. The
245 driver will be available until the real driver model serial is
248 config DEBUG_ARC_SERIAL
250 depends on ARC_SERIAL
252 Select this to enable a debug UART using the ARC UART driver.
253 You will need to provide parameters to make this work. The
254 driver will be available until the real driver model serial is
257 config DEBUG_UART_ATMEL
259 depends on ATMEL_USART
261 Select this to enable a debug UART using the atmel usart driver. You
262 will need to provide parameters to make this work. The driver will
263 be available until the real driver-model serial is running.
265 config DEBUG_UART_BCM6345
267 depends on BCM6345_SERIAL
269 Select this to enable a debug UART on BCM6345 SoCs. You
270 will need to provide parameters to make this work. The driver will
271 be available until the real driver model serial is running.
273 config DEBUG_UART_NS16550
275 depends on SYS_NS16550
277 Select this to enable a debug UART using the ns16550 driver. You
278 will need to provide parameters to make this work. The driver will
279 be available until the real driver model serial is running.
281 config DEBUG_EFI_CONSOLE
285 Select this to enable a debug console which calls back to EFI to
286 output to the console. This can be useful for early debugging of
287 U-Boot when running on top of EFI (Extensive Firmware Interface).
288 This is a type of BIOS used by PCs.
290 config DEBUG_SBI_CONSOLE
294 Select this to enable a debug console which calls back to SBI to
295 output to the console. This can be useful for early debugging of
296 U-Boot when running on top of SBI (Supervisor Binary Interface).
298 config DEBUG_UART_S5P
300 depends on ARCH_APPLE || ARCH_EXYNOS || ARCH_S5PC1XX
302 Select this to enable a debug UART using the serial_s5p driver. You
303 will need to provide parameters to make this work. The driver will
304 be available until the real driver-model serial is running.
306 config DEBUG_UART_MSM_GENI
307 bool "Qualcomm snapdragon"
308 depends on ARCH_SNAPDRAGON
310 Select this to enable a debug UART using the serial_msm driver. You
311 will need to provide parameters to make this work. The driver will
312 be available until the real driver-model serial is running.
314 config DEBUG_UART_MESON
316 depends on MESON_SERIAL
318 Select this to enable a debug UART using the serial_meson driver. You
319 will need to provide parameters to make this work. The driver will
320 be available until the real driver-model serial is running.
322 config DEBUG_UART_UARTLITE
323 bool "Xilinx Uartlite"
324 depends on XILINX_UARTLITE
326 Select this to enable a debug UART using the serial_uartlite driver.
327 You will need to provide parameters to make this work. The driver will
328 be available until the real driver-model serial is running.
330 config DEBUG_UART_ARM_DCC
334 Select this to enable a debug UART using the ARM JTAG DCC port.
335 The DCC port can be used for very early debugging and doesn't require
336 any additional setting like address/baudrate/clock. On systems without
337 any serial interface this is the easiest way how to get console.
338 Every ARM core has own DCC port which is the part of debug interface.
339 This port is available at least on ARMv6, ARMv7, ARMv8 and XScale
342 config DEBUG_MVEBU_A3700_UART
343 bool "Marvell Armada 3700"
344 depends on MVEBU_A3700_UART
346 Select this to enable a debug UART using the serial_mvebu driver. You
347 will need to provide parameters to make this work. The driver will
348 be available until the real driver-model serial is running.
350 config DEBUG_UART_ZYNQ
352 depends on ZYNQ_SERIAL
354 Select this to enable a debug UART using the serial_zynq driver. You
355 will need to provide parameters to make this work. The driver will
356 be available until the real driver-model serial is running.
358 config DEBUG_UART_APBUART
360 bool "Gaisler APBUART"
362 Select this to enable a debug UART using the serial_leon3 driver. You
363 will need to provide parameters to make this work. The driver will
364 be available until the real driver model serial is running.
366 config DEBUG_UART_PL010
368 depends on PL01X_SERIAL
370 Select this to enable a debug UART using the pl01x driver with the
371 PL010 UART type. You will need to provide parameters to make this
372 work. The driver will be available until the real driver model
375 config DEBUG_UART_PL011
377 depends on PL01X_SERIAL || PL011_SERIAL
379 Select this to enable a debug UART using the pl01x driver with the
380 PL011 UART type. You will need to provide parameters to make this
381 work. The driver will be available until the real driver model
384 config DEBUG_UART_PIC32
385 bool "Microchip PIC32"
386 depends on PIC32_SERIAL
388 Select this to enable a debug UART using the serial_pic32 driver. You
389 will need to provide parameters to make this work. The driver will
390 be available until the real driver model serial is running.
392 config DEBUG_UART_MXC
393 bool "IMX Serial port"
396 Select this to enable a debug UART using the serial_mxc driver. You
397 will need to provide parameters to make this work. The driver will
398 be available until the real driver model serial is running.
400 config DEBUG_UART_SANDBOX
402 depends on SANDBOX_SERIAL
404 Select this to enable the debug UART using the sandbox driver. This
405 provides basic serial output from the console without needing to
406 start up driver model. The driver will be available until the real
407 driver model serial is running.
409 config DEBUG_UART_SEMIHOSTING
411 depends on SEMIHOSTING_SERIAL
413 Select this to enable the debug UART using the semihosting driver.
414 This provides basic serial output from the console without needing to
415 start up driver model. The driver will be available until the real
416 driver model serial is running.
418 config DEBUG_UART_SIFIVE
420 depends on SIFIVE_SERIAL
422 Select this to enable a debug UART using the serial_sifive driver. You
423 will need to provide parameters to make this work. The driver will
424 be available until the real driver-model serial is running.
426 config DEBUG_UART_STM32
427 bool "STMicroelectronics STM32"
428 depends on STM32_SERIAL
430 Select this to enable a debug UART using the serial_stm32 driver
431 You will need to provide parameters to make this work.
432 The driver will be available until the real driver model
435 config DEBUG_UART_UNIPHIER
436 bool "UniPhier on-chip UART"
437 depends on ARCH_UNIPHIER
439 Select this to enable a debug UART using the UniPhier on-chip UART.
440 You will need to provide DEBUG_UART_BASE to make this work. The
441 driver will be available until the real driver-model serial is
444 config DEBUG_UART_OMAP
446 depends on OMAP_SERIAL
448 Select this to enable a debug UART using the omap ns16550 driver.
449 You will need to provide parameters to make this work. The driver
450 will be available until the real driver model serial is running.
452 config DEBUG_UART_MTK
453 bool "MediaTek High-speed UART"
454 depends on MTK_SERIAL
456 Select this to enable a debug UART using the MediaTek High-speed
458 You will need to provide parameters to make this work. The
459 driver will be available until the real driver model serial is
462 config DEBUG_UART_MT7620
463 bool "UART driver for MediaTek MT7620 and earlier SoCs"
464 depends on MT7620_SERIAL
466 Select this to enable a debug UART using the UART driver for
467 MediaTek MT7620 and earlier SoCs.
468 You will need to provide parameters to make this work. The
469 driver will be available until the real driver model serial is
474 config DEBUG_UART_BASE
475 hex "Base address of UART"
476 depends on DEBUG_UART
477 default 0 if DEBUG_SBI_CONSOLE
478 default 0 if DEBUG_UART_SANDBOX
479 default 0xff000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQMP
480 default 0xe0000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQ
482 This is the base address of your UART for memory-mapped UARTs.
484 A default should be provided by your board, but if not you will need
485 to use the correct value here.
487 config SPL_DEBUG_UART_BASE
488 hex "Base address of UART for SPL"
489 depends on SPL && DEBUG_UART
490 default DEBUG_UART_BASE
492 This is the base address of your UART for memory-mapped UARTs for SPL.
494 config TPL_DEBUG_UART_BASE
495 hex "Base address of UART for TPL"
496 depends on TPL && DEBUG_UART
497 default DEBUG_UART_BASE
499 This is the base address of your UART for memory-mapped UARTs for TPL.
501 config DEBUG_UART_CLOCK
502 int "UART input clock"
503 depends on DEBUG_UART
504 default 0 if DEBUG_SBI_CONSOLE
505 default 0 if DEBUG_UART_SANDBOX
506 default 0 if DEBUG_MVEBU_A3700_UART
507 default 100000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQMP
508 default 50000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQ
510 The UART input clock determines the speed of the internal UART
511 circuitry. The baud rate is derived from this by dividing the input
514 A default should be provided by your board, but if not you will need
515 to use the correct value here.
517 config DEBUG_UART_SHIFT
518 int "UART register shift"
519 depends on DEBUG_UART
520 default 0 if DEBUG_UART
522 Some UARTs (notably ns16550) support different register layouts
523 where the registers are spaced either as bytes, words or some other
524 value. Use this value to specify the shift to use, where 0=byte
525 registers, 2=32-bit word registers, etc.
527 config DEBUG_UART_BOARD_INIT
528 bool "Enable board-specific debug UART init"
529 depends on DEBUG_UART
531 Some boards need to set things up before the debug UART can be used.
532 On these boards a call to debug_uart_init() is insufficient. When
533 this option is enabled, the function board_debug_uart_init() will
534 be called when debug_uart_init() is called. You can put any code
535 here that is needed to set up the UART ready for use, such as set
536 pin multiplexing or enable clocks.
538 config DEBUG_UART_ANNOUNCE
539 bool "Show a message when the debug UART starts up"
540 depends on DEBUG_UART
542 Enable this option to show a message when the debug UART is ready
543 for use. You will see a message like "<debug_uart> " as soon as
544 U-Boot has the UART ready for use (i.e. your code calls
545 debug_uart_init()). This can be useful just as a check that
546 everything is working.
548 config DEBUG_UART_SKIP_INIT
549 bool "Skip UART initialization"
550 depends on DEBUG_UART
552 Select this if the UART you want to use for debug output is already
553 initialized by the time U-Boot starts its execution.
555 config DEBUG_UART_NS16550_CHECK_ENABLED
556 bool "Check if UART is enabled on output"
557 depends on DEBUG_UART
558 depends on DEBUG_UART_NS16550
560 Select this if puts()/putc() might be called before the debug UART
561 has been initialized. If this is disabled, putc() might sit in a
562 tight loop if it is called before debug_uart_init() has been called.
564 Note that this does not work for every ns16550-compatible UART and
565 so has to be enabled carefully or you might notice lost characters.
567 config ALTERA_JTAG_UART
568 bool "Altera JTAG UART support"
571 Select this to enable an JTAG UART for Altera devices.The JTAG UART
572 core implements a method to communicate serial character streams
573 between a host PC and a Qsys system on an Altera FPGA. Please find
574 details on the "Embedded Peripherals IP User Guide" of Altera.
576 config ALTERA_JTAG_UART_BYPASS
577 bool "Bypass output when no connection"
578 depends on ALTERA_JTAG_UART
580 Bypass console output and keep going even if there is no JTAG
581 terminal connection with the host. The console output will resume
582 once the JTAG terminal is connected. Without the bypass, the console
583 output will wait forever until a JTAG terminal is connected. If you
587 bool "Altera UART support"
590 Select this to enable an UART for Altera devices. Please find
591 details on the "Embedded Peripherals IP User Guide" of Altera.
594 bool "QCA/Atheros ar933x UART support"
595 depends on DM_SERIAL && SOC_AR933X
597 Select this to enable UART support for QCA/Atheros ar933x
598 devices. This driver uses driver model and requires a device
599 tree binding to operate, please refer to the document at
600 doc/device-tree-bindings/serial/qca,ar9330-uart.txt.
603 bool "ARC UART support"
606 Select this to enable support for ARC UART now typically
607 only used in Synopsys DesignWare ARC simulators like nSIM.
610 bool "ARM Debug Communication Channel (DCC) as UART support"
613 Select this to enable using the ARM DCC as a form of UART.
616 bool "Atmel USART support"
618 Select this to enable USART support for Atmel SoCs. It can be
619 configured in the device tree, and input clock frequency can
620 be got from the clk node.
622 config SPL_UART_CLOCK
623 int "SPL fixed UART input clock"
624 depends on ATMEL_USART && SPL && !SPL_CLK
625 default 132096000 if ARCH_AT91
627 Provide a fixed clock value as input to the UART controller. This
628 might be needed on platforms which can't enable CONFIG_SPL_CLK
629 because of SPL image size restrictions.
631 config BCM283X_MU_SERIAL
632 bool "Support for BCM283x Mini-UART"
633 depends on DM_SERIAL && ARCH_BCM283X
636 Select this to enable Mini-UART support on BCM283X family of SoCs.
638 config BCM283X_PL011_SERIAL
639 bool "Support for BCM283x PL011 UART"
640 depends on PL01X_SERIAL && ARCH_BCM283X
643 Select this to enable an overriding PL011 driver for BCM283X SoCs
644 that supports automatic disable, so that it only gets used when
645 the UART is actually muxed.
647 config BCM6345_SERIAL
648 bool "Support for BCM6345 UART"
651 Select this to enable UART on BCM6345 SoCs.
653 config COREBOOT_SERIAL
654 bool "Coreboot UART support"
656 default y if SYS_COREBOOT
659 Select this to enable a ns16550-style UART where the platform data
660 comes from the coreboot 'sysinfo' tables. This allows U-Boot to have
661 a serial console on any platform without needing to change the
665 bool "Cortina UART support"
668 Select this to enable UART support for Cortina-Access UART devices
669 found on CAxxxx SoCs.
671 config FSL_LINFLEXUART
672 bool "Freescale Linflex UART support"
675 Select this to enable the Linflex serial module found on some
676 NXP SoCs like S32V234.
679 bool "Freescale LPUART support"
681 Select this to enable a Low Power UART for Freescale VF610 and
682 QorIQ Layerscape devices.
685 bool "Use the LPUART as console"
686 depends on FSL_LPUART
688 config MVEBU_A3700_UART
689 bool "UART support for Armada 3700"
691 Choose this option to add support for UART driver on the Marvell
692 Armada 3700 SoC. The base address is configured via DT.
695 bool "Freescale ColdFire UART support"
697 Choose this option to add support for UART driver on the ColdFire
698 SoC's family. The serial communication channel provides a full-duplex
699 asynchronous/synchronous receiver and transmitter deriving an
700 operating frequency from the internal bus clock or an external clock.
703 bool "IMX serial port support"
704 depends on ARCH_MX31 || MX5 || MX6 || MX7 || IMX8M
706 If you have a machine based on a Motorola IMX CPU you
707 can enable its onboard serial port by enabling this option.
709 config NULLDEV_SERIAL
710 bool "Null serial device"
712 Select this to enable null serial device support. A null serial
713 device merely acts as a placeholder for a serial device and does
714 nothing for all it's operation.
717 bool "Support for Microchip PIC32 on-chip UART"
718 depends on DM_SERIAL && MACH_PIC32
721 Support for the UART found on Microchip PIC32 SoC's.
724 bool "NS16550 UART or compatible"
726 Support NS16550 UART or compatible. This can be enabled in the
727 device tree with the correct input clock frequency. If the input
728 clock frequency is not defined in the device tree, the macro
729 CONFIG_SYS_NS16550_CLK defined in a legacy board header file will
730 be used. It can be a constant or a function to get clock, eg,
733 config NS16550_DYNAMIC
734 bool "Allow NS16550 to be configured at runtime"
735 default y if SYS_COREBOOT || SYS_SLIMBOOTLOADER
737 Enable this option to allow device-tree control of the driver.
739 Normally this driver is controlled by the following options:
741 CONFIG_SYS_NS16550_PORT_MAPPED - indicates that port I/O is used for
742 access. If not enabled, then the UART is memory-mapped.
743 CONFIG_SYS_NS16550_MEM32 - if memory-mapped, indicates that 32-bit
744 access should be used (instead of 8-bit)
745 CONFIG_SYS_NS16550_REG_SIZE - indicates register width and also
746 endianness. If positive, big-endian access is used. If negative,
747 little-endian is used.
749 It is not a good practice for a driver to be statically configured,
750 since it prevents the same driver being used for different types of
751 UARTs in a system. This option avoids this problem at the cost of a
752 slightly increased code size.
754 config INTEL_MID_SERIAL
755 bool "Intel MID platform UART support"
756 depends on DM_SERIAL && OF_CONTROL
760 Select this to enable a UART for Intel MID platforms.
761 This uses the ns16550 driver as a library.
764 bool "ARM PL011 driver"
765 depends on !DM_SERIAL
767 Select this to enable a UART for platforms using PL011.
770 bool "ARM PL010 and PL011 driver"
773 Select this to enable a UART for platforms using PL010 or PL011.
775 config ROCKCHIP_SERIAL
776 bool "Rockchip on-chip UART support"
780 Select this to enable a debug UART for Rockchip devices when using
781 OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
782 This uses the ns16550 driver, converting the platdata from of-platdata
783 to the ns16550 format.
786 bool "Support for Samsung S5P UART"
787 depends on ARCH_APPLE || ARCH_EXYNOS || ARCH_S5PC1XX
790 Select this to enable Samsung S5P UART support.
792 config SANDBOX_SERIAL
793 bool "Sandbox UART support"
797 Select this to enable a seral UART for sandbox. This is required to
798 operate correctly, otherwise you will see no serial output from
799 sandbox. The emulated UART will display to the console and console
800 input will be fed into the UART. This allows you to interact with
803 The operation of the console is controlled by the -t command-line
804 flag. In raw mode, U-Boot sees all characters from the terminal
805 before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
806 is processed by the terminal, and terminates U-Boot. Valid options
809 -t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot
810 -t raw Raw mode, Ctrl-C is processed by U-Boot
811 -t cooked Cooked mode, Ctrl-C terminates
814 bool "Renesas SCIF UART support"
815 depends on SH || ARCH_RMOBILE
817 Select this to enable Renesas SCIF UART. To operate serial ports
818 on systems with RCar or SH SoCs, say Y to this option. If unsure,
822 prompt "SCIF console port"
823 depends on SCIF_CONSOLE && (!DM_SERIAL || (SPL && !SPL_DM_SERIAL))
842 config SH_SCIF_CLK_FREQ
843 int "SCIF console clock frequency"
844 depends on SCIF_CONSOLE && (!DM_SERIAL || (SPL && !SPL_DM_SERIAL))
847 config SEMIHOSTING_SERIAL
848 bool "Semihosting UART support"
849 depends on SEMIHOSTING && !SERIAL_RX_BUFFER
852 Select this to enable a serial UART using semihosting. Special halt
853 instructions will be issued which an external debugger (such as a
854 JTAG emulator) may interpret. The debugger will display U-Boot's
855 console output on the host system.
857 Enable this option only if you are using a debugger which supports
858 semihosting. If you are not using a debugger, this driver will halt
861 config UNIPHIER_SERIAL
862 bool "Support for UniPhier on-chip UART"
863 depends on ARCH_UNIPHIER
866 If you have a UniPhier based board and want to use the on-chip
867 serial ports, say Y to this option. If unsure, say N.
869 config XILINX_UARTLITE
870 bool "Xilinx Uarlite support"
873 If you have a Xilinx based board and want to use the uartlite
874 serial ports, say Y to this option. If unsure, say N.
877 bool "Support for Amlogic Meson UART"
878 depends on DM_SERIAL && ARCH_MESON
880 If you have an Amlogic Meson based board and want to use the on-chip
881 serial ports, say Y to this option. If unsure, say N.
884 bool "Qualcomm on-chip UART"
887 Support Data Mover UART used on Qualcomm Snapdragon SoCs.
888 It should support all Qualcomm devices with UARTDM version 1.4,
889 for example APQ8016 and MSM8916.
890 Single baudrate is supported in current implementation (115200).
892 config MSM_GENI_SERIAL
893 bool "Qualcomm on-chip GENI UART"
895 Support UART based on Generic Interface (GENI) Serial Engine (SE),
896 used on Qualcomm Snapdragon SoCs. Should support all qualcomm SOCs
897 with Qualcomm Universal Peripheral (QUP) Wrapper cores,
898 i.e. newer ones, starting from SDM845.
899 Driver works in FIFO mode.
900 Multiple baudrates supported.
902 config OCTEON_SERIAL_BOOTCMD
903 bool "MIPS Octeon PCI remote bootcmd input"
904 depends on ARCH_OCTEON
909 This driver supports remote input over the PCIe bus from a host
910 to U-Boot for entering commands. It is utilized by the host
911 commands 'oct-remote-load' and 'oct-remote-bootcmd'.
913 config OCTEON_SERIAL_PCIE_CONSOLE
914 bool "MIPS Octeon PCIe remote console"
915 depends on ARCH_OCTEON
916 depends on (DM_SERIAL && DM_STDIO)
917 select SYS_STDIO_DEREGISTER
918 select SYS_CONSOLE_IS_IN_ENV
921 This driver supports remote console over the PCIe bus when the
922 Octeon is running in PCIe target mode. The host program
923 'oct-remote-console' can be used to connect to this console.
924 The console number will likely be 0 or 1.
927 bool "Support for OMAP specific UART"
929 default y if (ARCH_OMAP2PLUS || ARCH_K3)
932 If you have an TI based SoC and want to use the on-chip serial
933 port, say Y to this option. If unsure say N.
936 bool "Actions Semi OWL UART"
937 depends on DM_SERIAL && ARCH_OWL
939 If you have a Actions Semi OWL based board and want to use the on-chip
940 serial port, say Y to this option. If unsure, say N.
941 Single baudrate is supported in current implementation (115200).
944 bool "PXA serial port support"
946 If you have a machine based on a Marvell XScale PXA2xx CPU you
947 can enable its onboard serial ports by enabling this option.
950 bool "RISC-V HTIF console support"
951 depends on DM_SERIAL && 64BIT
953 Select this to enable host transfer interface (HTIF) based serial
954 console. The HTIF device is quite common in RISC-V emulators and
955 RISC-V ISS so this driver allows using U-Boot on such platforms.
958 bool "SiFive UART support"
961 This driver supports the SiFive UART. If unsure say N.
963 config STI_ASC_SERIAL
964 bool "STMicroelectronics on-chip UART"
965 depends on DM_SERIAL && ARCH_STI
967 Select this to enable Asynchronous Serial Controller available
968 on STiH410 SoC. This is a basic implementation, it supports
969 following baudrate 9600, 19200, 38400, 57600 and 115200.
972 bool "STMicroelectronics STM32 SoCs on-chip UART"
973 depends on DM_SERIAL && (STM32F4 || STM32F7 || STM32H7 || ARCH_STM32MP)
975 If you have a machine based on a STM32 F4, F7, H7 or MP1 SOC
976 you can enable its onboard serial ports, say Y to this option.
980 bool "Cadence (Xilinx Zynq) UART support"
983 This driver supports the Cadence UART. It is found e.g. in Xilinx
987 bool "MediaTek High-speed UART support"
990 Select this to enable UART support for MediaTek High-speed UART
991 devices. This driver uses driver model and requires a device
992 tree binding to operate.
993 The High-speed UART is compatible with the ns16550a UART and have
994 its own high-speed registers.
997 bool "UART driver for MediaTek MT7620 and earlier SoCs"
1000 Select this to enable UART support for MediaTek MT7620 and earlier
1001 SoCs. This driver uses driver model and requires a device tree
1003 The UART driver for MediaTek MT7620 and earlier SoCs is *NOT*
1004 compatible with the ns16550a UART.
1007 bool "Console driver for MPC8XX"
1012 bool "Nuvoton NPCM UART driver"
1013 depends on DM_SERIAL
1015 Select this to enable UART support for Nuvoton BMCs
1016 (NPCM7xx and NPCM8xx).
1017 The driver enables the onboard serial port with 8-N-1
1021 bool "XEN serial support"
1024 If built without DM support, then requires Xen
1025 to be built with CONFIG_VERBOSE_DEBUG.
1028 prompt "Console port"
1029 default 8xx_CONS_SMC1
1030 depends on MPC8XX_CONS
1032 Depending on board, select one serial port
1033 (CONFIG_8xx_CONS_SMC1 or CONFIG_8xx_CONS_SMC2)
1035 config 8xx_CONS_SMC1
1038 config 8xx_CONS_SMC2
1043 config SYS_SMC_RXBUFLEN
1044 int "Console Rx buffer length"
1045 depends on MPC8XX_CONS
1048 With CONFIG_SYS_SMC_RXBUFLEN it is possible to define
1049 the maximum receive buffer length for the SMC.
1050 This option is actual only for 8xx possible.
1051 If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE
1052 must be defined, to setup the maximum idle timeout for
1056 int "maximum idle timeout"
1057 depends on MPC8XX_CONS
1060 config SYS_BRGCLK_PRESCALE
1061 int "BRG Clock Prescale"
1062 depends on MPC8XX_CONS
1067 depends on MPC8XX_CONS
1072 depends on MPC8XX_CONS