path: root/drivers/tty/serial/Kconfig

# SPDX-License-Identifier: GPL-2.0
#
# Serial device configuration
#

menu "Serial drivers"
	depends on HAS_IOMEM

config SERIAL_EARLYCON
	bool
	depends on SERIAL_CORE
	help
	  Support for early consoles with the earlycon parameter. This enables
	  the console before standard serial driver is probed. The console is
	  enabled when early_param is processed.

source "drivers/tty/serial/8250/Kconfig"

comment "Non-8250 serial port support"

config SERIAL_AMBA_PL010
	tristate "ARM AMBA PL010 serial port support"
	depends on ARM_AMBA || COMPILE_TEST
	select SERIAL_CORE
	help
	  This selects the ARM(R) AMBA(R) PrimeCell PL010 UART.  If you have
	  an Integrator/AP or Integrator/PP2 platform, or if you have a
	  Cirrus Logic EP93xx CPU, say Y or M here.

	  If unsure, say N.

config SERIAL_AMBA_PL010_CONSOLE
	bool "Support for console on AMBA serial port"
	depends on SERIAL_AMBA_PL010=y
	select SERIAL_CORE_CONSOLE
	help
	  Say Y here if you wish to use an AMBA PrimeCell UART as the system
	  console (the system console is the device which receives all kernel
	  messages and warnings and which allows logins in single user mode).

	  Even if you say Y here, the currently visible framebuffer console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttyAM0". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_AMBA_PL011
	tristate "ARM AMBA PL011 serial port support"
	depends on ARM_AMBA
	select SERIAL_CORE
	help
	  This selects the ARM(R) AMBA(R) PrimeCell PL011 UART.  If you have
	  an Integrator/PP2, Integrator/CP or Versatile platform, say Y or M
	  here.

	  If unsure, say N.

config SERIAL_AMBA_PL011_CONSOLE
	bool "Support for console on AMBA serial port"
	depends on SERIAL_AMBA_PL011=y
	select SERIAL_CORE_CONSOLE
	select SERIAL_EARLYCON
	help
	  Say Y here if you wish to use an AMBA PrimeCell UART as the system
	  console (the system console is the device which receives all kernel
	  messages and warnings and which allows logins in single user mode).

	  Even if you say Y here, the currently visible framebuffer console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttyAMA0". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_EARLYCON_SEMIHOST
	bool "Early console using Arm compatible semihosting"
	depends on ARM64 || ARM || RISCV
	select SERIAL_CORE
	select SERIAL_CORE_CONSOLE
	select SERIAL_EARLYCON
	help
	  Support for early debug console using Arm compatible semihosting.
	  This enables the console before standard serial driver is probed.
	  This is enabled with "earlycon=smh" on the kernel command line.
	  The console is enabled when early_param is processed.

config SERIAL_EARLYCON_RISCV_SBI
	bool "Early console using RISC-V SBI"
	depends on RISCV_SBI
	select SERIAL_CORE
	select SERIAL_CORE_CONSOLE
	select SERIAL_EARLYCON
	help
	  Support for early debug console using RISC-V SBI. This enables
	  the console before standard serial driver is probed. This is enabled
	  with "earlycon=sbi" on the kernel command line. The console is
	  enabled when early_param is processed.

config SERIAL_SB1250_DUART
	tristate "BCM1xxx on-chip DUART serial support"
	depends on SIBYTE_SB1xxx_SOC=y
	select SERIAL_CORE
	default y
	help
	  Support for the asynchronous serial interface (DUART) included in
	  the BCM1250 and derived System-On-a-Chip (SOC) devices.  Note that
	  the letter D in DUART stands for "dual", which is how the device
	  is implemented.  Depending on the SOC configuration there may be
	  one or more DUARTs available of which all are handled.

	  If unsure, say Y.  To compile this driver as a module, choose M here:
	  the module will be called