drivers/tty/Kconfig - kernel/msm - Gitiles

 config VT
 	bool "Virtual terminal" if EXPERT
 	depends on !S390
 	select INPUT
 	default y
 	---help---
 	  If you say Y here, you will get support for terminal devices with
 	  display and keyboard devices. These are called "virtual" because you
 	  can run several virtual terminals (also called virtual consoles) on
 	  one physical terminal. This is rather useful, for example one
 	  virtual terminal can collect system messages and warnings, another
 	  one can be used for a text-mode user session, and a third could run
 	  an X session, all in parallel. Switching between virtual terminals
 	  is done with certain key combinations, usually Alt-<function key>.

 	  The setterm command ("man setterm") can be used to change the
 	  properties (such as colors or beeping) of a virtual terminal. The
 	  man page console_codes(4) ("man console_codes") contains the special
 	  character sequences that can be used to change those properties
 	  directly. The fonts used on virtual terminals can be changed with
 	  the setfont ("man setfont") command and the key bindings are defined
 	  with the loadkeys ("man loadkeys") command.

 	  You need at least one virtual terminal device in order to make use
 	  of your keyboard and monitor. Therefore, only people configuring an
 	  embedded system would want to say N here in order to save some
 	  memory; the only way to log into such a system is then via a serial
 	  or network connection.

 	  If unsure, say Y, or else you won't be able to do much with your new
 	  shiny Linux system :-)

 config CONSOLE_TRANSLATIONS
 	depends on VT
 	default y
 	bool "Enable character translations in console" if EXPERT
 	---help---
 	  This enables support for font mapping and Unicode translation
 	  on virtual consoles.

 config VT_CONSOLE
 	bool "Support for console on virtual terminal" if EXPERT
 	depends on VT
 	default y
 	---help---
 	  The system console is the device which receives all kernel messages
 	  and warnings and which allows logins in single user mode. If you
 	  answer Y here, a virtual terminal (the device used to interact with
 	  a physical terminal) can be used as system console. This is the most
 	  common mode of operations, so you should say Y here unless you want
 	  the kernel messages be output only to a serial port (in which case
 	  you should say Y to "Console on serial port", below).

 	  If you do say Y here, by default the currently visible virtual
 	  terminal (/dev/tty0) will be used as system console. You can change
 	  that with a kernel command line option such as "console=tty3" which
 	  would use the third virtual terminal as system console. (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.)

 	  If unsure, say Y.

 config VT_CONSOLE_SLEEP
 	def_bool y
 	depends on VT_CONSOLE && PM_SLEEP

 config HW_CONSOLE
 	bool
 	depends on VT && !S390 && !UML
 	default y

 config VT_HW_CONSOLE_BINDING
        bool "Support for binding and unbinding console drivers"
        depends on HW_CONSOLE
        default n
        ---help---
          The virtual terminal is the device that interacts with the physical
          terminal through console drivers. On these systems, at least one
          console driver is loaded. In other configurations, additional console
          drivers may be enabled, such as the framebuffer console. If more than
          1 console driver is enabled, setting this to 'y' will allow you to
          select the console driver that will serve as the backend for the
          virtual terminals.

 	 See <file:Documentation/console/console.txt> for more
 	 information. For framebuffer console users, please refer to
 	 <file:Documentation/fb/fbcon.txt>.

 config UNIX98_PTYS
 	bool "Unix98 PTY support" if EXPERT
 	default y
 	---help---
 	  A pseudo terminal (PTY) is a software device consisting of two
 	  halves: a master and a slave. The slave device behaves identical to
 	  a physical terminal; the master device is used by a process to
 	  read data from and write data to the slave, thereby emulating a
 	  terminal. Typical programs for the master side are telnet servers
 	  and xterms.

 	  Linux has traditionally used the BSD-like names /dev/ptyxx for
 	  masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
 	  has a number of problems. The GNU C library glibc 2.1 and later,
 	  however, supports the Unix98 naming standard: in order to acquire a
 	  pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
 	  terminal is then made available to the process and the pseudo
 	  terminal slave can be accessed as /dev/pts/<number>. What was
 	  traditionally /dev/ttyp2 will then be /dev/pts/2, for example.

 	  All modern Linux systems use the Unix98 ptys.  Say Y unless
 	  you're on an embedded system and want to conserve memory.

 config DEVPTS_MULTIPLE_INSTANCES
 	bool "Support multiple instances of devpts"
 	depends on UNIX98_PTYS
 	default n
 	---help---
 	  Enable support for multiple instances of devpts filesystem.
 	  If you want to have isolated PTY namespaces (eg: in containers),
 	  say Y here.  Otherwise, say N. If enabled, each mount of devpts
 	  filesystem with the '-o newinstance' option will create an
 	  independent PTY namespace.

 config LEGACY_PTYS
 	bool "Legacy (BSD) PTY support"
 	default y
 	---help---
 	  A pseudo terminal (PTY) is a software device consisting of two
 	  halves: a master and a slave. The slave device behaves identical to
 	  a physical terminal; the master device is used by a process to
 	  read data from and write data to the slave, thereby emulating a
 	  terminal. Typical programs for the master side are telnet servers
 	  and xterms.

 	  Linux has traditionally used the BSD-like names /dev/ptyxx
 	  for masters and /dev/ttyxx for slaves of pseudo
 	  terminals. This scheme has a number of problems, including
 	  security.  This option enables these legacy devices; on most
 	  systems, it is safe to say N.


 config LEGACY_PTY_COUNT
 	int "Maximum number of legacy PTY in use"
 	depends on LEGACY_PTYS
 	range 0 256
 	default "256"
 	---help---
 	  The maximum number of legacy PTYs that can be used at any one time.
 	  The default is 256, and should be more than enough.  Embedded
 	  systems may want to reduce this to save memory.

 	  When not in use, each legacy PTY occupies 12 bytes on 32-bit
 	  architectures and 24 bytes on 64-bit architectures.

 config BFIN_JTAG_COMM
 	tristate "Blackfin JTAG Communication"
 	depends on BLACKFIN
 	help
 	  Add support for emulating a TTY device over the Blackfin JTAG.

 	  To compile this driver as a module, choose M here: the
 	  module will be called bfin_jtag_comm.

 config BFIN_JTAG_COMM_CONSOLE
 	bool "Console on Blackfin JTAG"
 	depends on BFIN_JTAG_COMM=y

 config SERIAL_NONSTANDARD
 	bool "Non-standard serial port support"
 	depends on HAS_IOMEM
 	---help---
 	  Say Y here if you have any non-standard serial boards -- boards
 	  which aren't supported using the standard "dumb" serial driver.
 	  This includes intelligent serial boards such as Cyclades,
 	  Digiboards, etc. These are usually used for systems that need many
 	  serial ports because they serve many terminals or dial-in
 	  connections.

 	  Note that the answer to this question won't directly affect the
 	  kernel: saying N will just cause the configurator to skip all
 	  the questions about non-standard serial boards.

 	  Most people can say N here.

 config ROCKETPORT
 	tristate "Comtrol RocketPort support"
 	depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
 	help
 	  This driver supports Comtrol RocketPort and RocketModem PCI boards.
           These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or
           modems.  For information about the RocketPort/RocketModem  boards
           and this driver read <file:Documentation/serial/rocket.txt>.

 	  To compile this driver as a module, choose M here: the
 	  module will be called rocket.

 	  If you want to compile this driver into the kernel, say Y here.  If
           you don't have a Comtrol RocketPort/RocketModem card installed, say N.

 config CYCLADES
 	tristate "Cyclades async mux support"
 	depends on SERIAL_NONSTANDARD && (PCI || ISA)
 	select FW_LOADER
 	---help---
 	  This driver supports Cyclades Z and Y multiserial boards.
 	  You would need something like this to connect more than two modems to
 	  your Linux box, for instance in order to become a dial-in server.

 	  For information about the Cyclades-Z card, read
 	  <file:Documentation/serial/README.cycladesZ>.

 	  To compile this driver as a module, choose M here: the
 	  module will be called cyclades.

 	  If you haven't heard about it, it's safe to say N.

 config CYZ_INTR
 	bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)"
 	depends on EXPERIMENTAL && CYCLADES
 	help
 	  The Cyclades-Z family of multiport cards allows 2 (two) driver op
 	  modes: polling and interrupt. In polling mode, the driver will check
 	  the status of the Cyclades-Z ports every certain amount of time
 	  (which is called polling cycle and is configurable). In interrupt
 	  mode, it will use an interrupt line (IRQ) in order to check the
 	  status of the Cyclades-Z ports. The default op mode is polling. If
 	  unsure, say N.

 config MOXA_INTELLIO
 	tristate "Moxa Intellio support"
 	depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
 	select FW_LOADER
 	help
 	  Say Y here if you have a Moxa Intellio multiport serial card.

 	  To compile this driver as a module, choose M here: the
 	  module will be called moxa.

 config MOXA_SMARTIO
 	tristate "Moxa SmartIO support v. 2.0"
 	depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA)
 	help
 	  Say Y here if you have a Moxa SmartIO multiport serial card and/or
 	  want to help develop a new version of this driver.

 	  This is upgraded (1.9.1) driver from original Moxa drivers with
 	  changes finally resulting in PCI probing.

 	  This driver can also be built as a module. The module will be called
 	  mxser. If you want to do that, say M here.

 config SYNCLINK
 	tristate "Microgate SyncLink card support"
 	depends on SERIAL_NONSTANDARD && PCI && ISA_DMA_API
 	help
 	  Provides support for the SyncLink ISA and PCI multiprotocol serial
 	  adapters. These adapters support asynchronous and HDLC bit
 	  synchronous communication up to 10Mbps (PCI adapter).

 	  This driver can only be built as a module ( = code which can be
 	  inserted in and removed from the running kernel whenever you want).
 	  The module will be called synclink.  If you want to do that, say M
 	  here.

 config SYNCLINKMP
 	tristate "SyncLink Multiport support"
 	depends on SERIAL_NONSTANDARD && PCI
 	help
 	  Enable support for the SyncLink Multiport (2 or 4 ports)
 	  serial adapter, running asynchronous and HDLC communications up
 	  to 2.048Mbps. Each ports is independently selectable for
 	  RS-232, V.35, RS-449, RS-530, and X.21

 	  This driver may be built as a module ( = code which can be
 	  inserted in and removed from the running kernel whenever you want).
 	  The module will be called synclinkmp.  If you want to do that, say M
 	  here.

 config SYNCLINK_GT
 	tristate "SyncLink GT/AC support"
 	depends on SERIAL_NONSTANDARD && PCI
 	help
 	  Support for SyncLink GT and SyncLink AC families of
 	  synchronous and asynchronous serial adapters
 	  manufactured by Microgate Systems, Ltd. (www.microgate.com)

 config NOZOMI
 	tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
 	depends on PCI && EXPERIMENTAL
 	help
 	  If you have a HSDPA driver Broadband Wireless Data Card -
 	  Globe Trotter PCMCIA card, say Y here.

 	  To compile this driver as a module, choose M here, the module
 	  will be called nozomi.

 config ISI
 	tristate "Multi-Tech multiport card support (EXPERIMENTAL)"
 	depends on SERIAL_NONSTANDARD && PCI
 	select FW_LOADER
 	help
 	  This is a driver for the Multi-Tech cards which provide several
 	  serial ports.  The driver is experimental and can currently only be
 	  built as a module. The module will be called isicom.
 	  If you want to do that, choose M here.

 config N_HDLC
 	tristate "HDLC line discipline support"
 	depends on SERIAL_NONSTANDARD
 	help
 	  Allows synchronous HDLC communications with tty device drivers that
 	  support synchronous HDLC such as the Microgate SyncLink adapter.

 	  This driver can be built as a module ( = code which can be
 	  inserted in and removed from the running kernel whenever you want).
 	  The module will be called n_hdlc. If you want to do that, say M
 	  here.

 config N_GSM
 	tristate "GSM MUX line discipline support (EXPERIMENTAL)"
 	depends on EXPERIMENTAL
 	depends on NET
 	help
 	  This line discipline provides support for the GSM MUX protocol and
 	  presents the mux as a set of 61 individual tty devices.

 config TRACE_ROUTER
 	tristate "Trace data router for MIPI P1149.7 cJTAG standard"
 	depends on TRACE_SINK
 	default n
 	help
 	  The trace router uses the Linux tty line discipline framework to
 	  route trace data coming from a tty port (say UART for example) to
 	  the trace sink line discipline driver and to another tty port (say
 	  USB). This is part of a solution for the MIPI P1149.7, compact JTAG,
 	  standard, which is for debugging mobile devices. The PTI driver in
 	  drivers/misc/pti.c defines the majority of this MIPI solution.

 	  You should select this driver if the target kernel is meant for
 	  a mobile device containing a modem.  Then you will need to select
 	  "Trace data sink for MIPI P1149.7 cJTAG standard" line discipline
 	  driver.

 config TRACE_SINK
 	tristate "Trace data sink for MIPI P1149.7 cJTAG standard"
 	default n
 	help
 	  The trace sink uses the Linux line discipline framework to receive
 	  trace data coming from the trace router line discipline driver
 	  to a user-defined tty port target, like USB.
 	  This is to provide a way to extract modem trace data on
 	  devices that do not have a PTI HW module, or just need modem
 	  trace data to come out of a different HW output port.
 	  This is part of a solution for the P1149.7, compact JTAG, standard.

 	  If you select this option, you need to select
 	  "Trace data router for MIPI P1149.7 cJTAG standard".
	config VT
	bool "Virtual terminal" if EXPERT
	depends on !S390
	select INPUT
	default y
	---help---
	If you say Y here, you will get support for terminal devices with
	display and keyboard devices. These are called "virtual" because you
	can run several virtual terminals (also called virtual consoles) on
	one physical terminal. This is rather useful, for example one
	virtual terminal can collect system messages and warnings, another
	one can be used for a text-mode user session, and a third could run
	an X session, all in parallel. Switching between virtual terminals
	is done with certain key combinations, usually Alt-<function key>.

	The setterm command ("man setterm") can be used to change the
	properties (such as colors or beeping) of a virtual terminal. The
	man page console_codes(4) ("man console_codes") contains the special
	character sequences that can be used to change those properties
	directly. The fonts used on virtual terminals can be changed with
	the setfont ("man setfont") command and the key bindings are defined
	with the loadkeys ("man loadkeys") command.

	You need at least one virtual terminal device in order to make use
	of your keyboard and monitor. Therefore, only people configuring an
	embedded system would want to say N here in order to save some
	memory; the only way to log into such a system is then via a serial
	or network connection.

	If unsure, say Y, or else you won't be able to do much with your new
	shiny Linux system :-)

	config CONSOLE_TRANSLATIONS
	depends on VT
	default y
	bool "Enable character translations in console" if EXPERT
	---help---
	This enables support for font mapping and Unicode translation
	on virtual consoles.

	config VT_CONSOLE
	bool "Support for console on virtual terminal" if EXPERT
	depends on VT
	default y
	---help---
	The system console is the device which receives all kernel messages
	and warnings and which allows logins in single user mode. If you
	answer Y here, a virtual terminal (the device used to interact with
	a physical terminal) can be used as system console. This is the most
	common mode of operations, so you should say Y here unless you want
	the kernel messages be output only to a serial port (in which case
	you should say Y to "Console on serial port", below).

	If you do say Y here, by default the currently visible virtual
	terminal (/dev/tty0) will be used as system console. You can change
	that with a kernel command line option such as "console=tty3" which
	would use the third virtual terminal as system console. (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.)

	If unsure, say Y.

	config VT_CONSOLE_SLEEP
	def_bool y
	depends on VT_CONSOLE && PM_SLEEP

	config HW_CONSOLE
	bool
	depends on VT && !S390 && !UML
	default y

	config VT_HW_CONSOLE_BINDING
	bool "Support for binding and unbinding console drivers"
	depends on HW_CONSOLE
	default n
	---help---
	The virtual terminal is the device that interacts with the physical
	terminal through console drivers. On these systems, at least one
	console driver is loaded. In other configurations, additional console
	drivers may be enabled, such as the framebuffer console. If more than
	1 console driver is enabled, setting this to 'y' will allow you to
	select the console driver that will serve as the backend for the
	virtual terminals.

	See <file:Documentation/console/console.txt> for more
	information. For framebuffer console users, please refer to
	<file:Documentation/fb/fbcon.txt>.

	config UNIX98_PTYS
	bool "Unix98 PTY support" if EXPERT
	default y
	---help---
	A pseudo terminal (PTY) is a software device consisting of two
	halves: a master and a slave. The slave device behaves identical to
	a physical terminal; the master device is used by a process to
	read data from and write data to the slave, thereby emulating a
	terminal. Typical programs for the master side are telnet servers
	and xterms.

	Linux has traditionally used the BSD-like names /dev/ptyxx for
	masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
	has a number of problems. The GNU C library glibc 2.1 and later,
	however, supports the Unix98 naming standard: in order to acquire a
	pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
	terminal is then made available to the process and the pseudo
	terminal slave can be accessed as /dev/pts/<number>. What was
	traditionally /dev/ttyp2 will then be /dev/pts/2, for example.

	All modern Linux systems use the Unix98 ptys. Say Y unless
	you're on an embedded system and want to conserve memory.

	config DEVPTS_MULTIPLE_INSTANCES
	bool "Support multiple instances of devpts"
	depends on UNIX98_PTYS
	default n
	---help---
	Enable support for multiple instances of devpts filesystem.
	If you want to have isolated PTY namespaces (eg: in containers),
	say Y here. Otherwise, say N. If enabled, each mount of devpts
	filesystem with the '-o newinstance' option will create an
	independent PTY namespace.

	config LEGACY_PTYS
	bool "Legacy (BSD) PTY support"
	default y
	---help---
	A pseudo terminal (PTY) is a software device consisting of two
	halves: a master and a slave. The slave device behaves identical to
	a physical terminal; the master device is used by a process to
	read data from and write data to the slave, thereby emulating a
	terminal. Typical programs for the master side are telnet servers
	and xterms.

	Linux has traditionally used the BSD-like names /dev/ptyxx
	for masters and /dev/ttyxx for slaves of pseudo
	terminals. This scheme has a number of problems, including
	security. This option enables these legacy devices; on most
	systems, it is safe to say N.


	config LEGACY_PTY_COUNT
	int "Maximum number of legacy PTY in use"
	depends on LEGACY_PTYS
	range 0 256
	default "256"
	---help---
	The maximum number of legacy PTYs that can be used at any one time.
	The default is 256, and should be more than enough. Embedded
	systems may want to reduce this to save memory.

	When not in use, each legacy PTY occupies 12 bytes on 32-bit
	architectures and 24 bytes on 64-bit architectures.

	config BFIN_JTAG_COMM
	tristate "Blackfin JTAG Communication"
	depends on BLACKFIN
	help
	Add support for emulating a TTY device over the Blackfin JTAG.

	To compile this driver as a module, choose M here: the
	module will be called bfin_jtag_comm.

	config BFIN_JTAG_COMM_CONSOLE
	bool "Console on Blackfin JTAG"
	depends on BFIN_JTAG_COMM=y

	config SERIAL_NONSTANDARD
	bool "Non-standard serial port support"
	depends on HAS_IOMEM
	---help---
	Say Y here if you have any non-standard serial boards -- boards
	which aren't supported using the standard "dumb" serial driver.
	This includes intelligent serial boards such as Cyclades,
	Digiboards, etc. These are usually used for systems that need many
	serial ports because they serve many terminals or dial-in
	connections.

	Note that the answer to this question won't directly affect the
	kernel: saying N will just cause the configurator to skip all
	the questions about non-standard serial boards.

	Most people can say N here.

	config ROCKETPORT
	tristate "Comtrol RocketPort support"
	depends on SERIAL_NONSTANDARD && (ISA \|\| EISA \|\| PCI)
	help
	This driver supports Comtrol RocketPort and RocketModem PCI boards.
	These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or
	modems. For information about the RocketPort/RocketModem boards
	and this driver read <file:Documentation/serial/rocket.txt>.

	To compile this driver as a module, choose M here: the
	module will be called rocket.

	If you want to compile this driver into the kernel, say Y here. If
	you don't have a Comtrol RocketPort/RocketModem card installed, say N.

	config CYCLADES
	tristate "Cyclades async mux support"
	depends on SERIAL_NONSTANDARD && (PCI \|\| ISA)
	select FW_LOADER
	---help---
	This driver supports Cyclades Z and Y multiserial boards.
	You would need something like this to connect more than two modems to
	your Linux box, for instance in order to become a dial-in server.

	For information about the Cyclades-Z card, read
	<file:Documentation/serial/README.cycladesZ>.

	To compile this driver as a module, choose M here: the
	module will be called cyclades.

	If you haven't heard about it, it's safe to say N.

	config CYZ_INTR
	bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)"
	depends on EXPERIMENTAL && CYCLADES
	help
	The Cyclades-Z family of multiport cards allows 2 (two) driver op
	modes: polling and interrupt. In polling mode, the driver will check
	the status of the Cyclades-Z ports every certain amount of time
	(which is called polling cycle and is configurable). In interrupt
	mode, it will use an interrupt line (IRQ) in order to check the
	status of the Cyclades-Z ports. The default op mode is polling. If
	unsure, say N.

	config MOXA_INTELLIO
	tristate "Moxa Intellio support"
	depends on SERIAL_NONSTANDARD && (ISA \|\| EISA \|\| PCI)
	select FW_LOADER
	help
	Say Y here if you have a Moxa Intellio multiport serial card.

	To compile this driver as a module, choose M here: the
	module will be called moxa.

	config MOXA_SMARTIO
	tristate "Moxa SmartIO support v. 2.0"
	depends on SERIAL_NONSTANDARD && (PCI \|\| EISA \|\| ISA)
	help
	Say Y here if you have a Moxa SmartIO multiport serial card and/or
	want to help develop a new version of this driver.

	This is upgraded (1.9.1) driver from original Moxa drivers with
	changes finally resulting in PCI probing.

	This driver can also be built as a module. The module will be called
	mxser. If you want to do that, say M here.

	config SYNCLINK
	tristate "Microgate SyncLink card support"
	depends on SERIAL_NONSTANDARD && PCI && ISA_DMA_API
	help
	Provides support for the SyncLink ISA and PCI multiprotocol serial
	adapters. These adapters support asynchronous and HDLC bit
	synchronous communication up to 10Mbps (PCI adapter).

	This driver can only be built as a module ( = code which can be
	inserted in and removed from the running kernel whenever you want).
	The module will be called synclink. If you want to do that, say M
	here.

	config SYNCLINKMP
	tristate "SyncLink Multiport support"
	depends on SERIAL_NONSTANDARD && PCI
	help
	Enable support for the SyncLink Multiport (2 or 4 ports)
	serial adapter, running asynchronous and HDLC communications up
	to 2.048Mbps. Each ports is independently selectable for
	RS-232, V.35, RS-449, RS-530, and X.21

	This driver may be built as a module ( = code which can be
	inserted in and removed from the running kernel whenever you want).
	The module will be called synclinkmp. If you want to do that, say M
	here.

	config SYNCLINK_GT
	tristate "SyncLink GT/AC support"
	depends on SERIAL_NONSTANDARD && PCI
	help
	Support for SyncLink GT and SyncLink AC families of
	synchronous and asynchronous serial adapters
	manufactured by Microgate Systems, Ltd. (www.microgate.com)

	config NOZOMI
	tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
	depends on PCI && EXPERIMENTAL
	help
	If you have a HSDPA driver Broadband Wireless Data Card -
	Globe Trotter PCMCIA card, say Y here.

	To compile this driver as a module, choose M here, the module
	will be called nozomi.

	config ISI
	tristate "Multi-Tech multiport card support (EXPERIMENTAL)"
	depends on SERIAL_NONSTANDARD && PCI
	select FW_LOADER
	help
	This is a driver for the Multi-Tech cards which provide several
	serial ports. The driver is experimental and can currently only be
	built as a module. The module will be called isicom.
	If you want to do that, choose M here.

	config N_HDLC
	tristate "HDLC line discipline support"
	depends on SERIAL_NONSTANDARD
	help
	Allows synchronous HDLC communications with tty device drivers that
	support synchronous HDLC such as the Microgate SyncLink adapter.

	This driver can be built as a module ( = code which can be
	inserted in and removed from the running kernel whenever you want).
	The module will be called n_hdlc. If you want to do that, say M
	here.

	config N_GSM
	tristate "GSM MUX line discipline support (EXPERIMENTAL)"
	depends on EXPERIMENTAL
	depends on NET
	help
	This line discipline provides support for the GSM MUX protocol and
	presents the mux as a set of 61 individual tty devices.

	config TRACE_ROUTER
	tristate "Trace data router for MIPI P1149.7 cJTAG standard"
	depends on TRACE_SINK
	default n
	help
	The trace router uses the Linux tty line discipline framework to
	route trace data coming from a tty port (say UART for example) to
	the trace sink line discipline driver and to another tty port (say
	USB). This is part of a solution for the MIPI P1149.7, compact JTAG,
	standard, which is for debugging mobile devices. The PTI driver in
	drivers/misc/pti.c defines the majority of this MIPI solution.

	You should select this driver if the target kernel is meant for
	a mobile device containing a modem. Then you will need to select
	"Trace data sink for MIPI P1149.7 cJTAG standard" line discipline
	driver.

	config TRACE_SINK
	tristate "Trace data sink for MIPI P1149.7 cJTAG standard"
	default n
	help
	The trace sink uses the Linux line discipline framework to receive
	trace data coming from the trace router line discipline driver
	to a user-defined tty port target, like USB.
	This is to provide a way to extract modem trace data on
	devices that do not have a PTI HW module, or just need modem
	trace data to come out of a different HW output port.
	This is part of a solution for the P1149.7, compact JTAG, standard.

	If you select this option, you need to select
	"Trace data router for MIPI P1149.7 cJTAG standard".