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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/char/Kconfig
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
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Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
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+# SPDX-License-Identifier: GPL-2.0
+#
+# Character device configuration
+#
+
+menu "Character devices"
+
+source "drivers/tty/Kconfig"
+
+config TTY_PRINTK
+ tristate "TTY driver to output user messages via printk"
+ depends on EXPERT && TTY
+ default n
+ help
+ If you say Y here, the support for writing user messages (i.e.
+ console messages) via printk is available.
+
+ The feature is useful to inline user messages with kernel
+ messages.
+ In order to use this feature, you should output user messages
+ to /dev/ttyprintk or redirect console to this TTY, or boot
+ the kernel with console=ttyprintk.
+
+ If unsure, say N.
+
+config TTY_PRINTK_LEVEL
+ depends on TTY_PRINTK
+ int "ttyprintk log level (1-7)"
+ range 1 7
+ default "6"
+ help
+ Printk log level to use for ttyprintk messages.
+
+config PRINTER
+ tristate "Parallel printer support"
+ depends on PARPORT
+ help
+ If you intend to attach a printer to the parallel port of your Linux
+ box (as opposed to using a serial printer; if the connector at the
+ printer has 9 or 25 holes ["female"], then it's serial), say Y.
+ Also read the Printing-HOWTO, available from
+ <https://www.tldp.org/docs.html#howto>.
+
+ It is possible to share one parallel port among several devices
+ (e.g. printer and ZIP drive) and it is safe to compile the
+ corresponding drivers into the kernel.
+
+ To compile this driver as a module, choose M here and read
+ <file:Documentation/admin-guide/parport.rst>. The module will be called lp.
+
+ If you have several parallel ports, you can specify which ports to
+ use with the "lp" kernel command line option. (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.) The syntax of the
+ "lp" command line option can be found in <file:drivers/char/lp.c>.
+
+ If you have more than 8 printers, you need to increase the LP_NO
+ macro in lp.c and the PARPORT_MAX macro in parport.h.
+
+config LP_CONSOLE
+ bool "Support for console on line printer"
+ depends on PRINTER
+ help
+ If you want kernel messages to be printed out as they occur, you
+ can have a console on the printer. This option adds support for
+ doing that; to actually get it to happen you need to pass the
+ option "console=lp0" to the kernel at boot time.
+
+ If the printer is out of paper (or off, or unplugged, or too
+ busy..) the kernel will stall until the printer is ready again.
+ By defining CONSOLE_LP_STRICT to 0 (at your own risk) you
+ can make the kernel continue when this happens,
+ but it'll lose the kernel messages.
+
+ If unsure, say N.
+
+config PPDEV
+ tristate "Support for user-space parallel port device drivers"
+ depends on PARPORT
+ help
+ Saying Y to this adds support for /dev/parport device nodes. This
+ is needed for programs that want portable access to the parallel
+ port, for instance deviceid (which displays Plug-and-Play device
+ IDs).
+
+ This is the parallel port equivalent of SCSI generic support (sg).
+ It is safe to say N to this -- it is not needed for normal printing
+ or parallel port CD-ROM/disk support.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ppdev.
+
+ If unsure, say N.
+
+config VIRTIO_CONSOLE
+ tristate "Virtio console"
+ depends on TTY
+ select HVC_DRIVER
+ select VIRTIO
+ help
+ Virtio console for use with hypervisors.
+
+ Also serves as a general-purpose serial device for data
+ transfer between the guest and host. Character devices at
+ /dev/vportNpn will be created when corresponding ports are
+ found, where N is the device number and n is the port number
+ within that device. If specified by the host, a sysfs
+ attribute called 'name' will be populated with a name for
+ the port which can be used by udev scripts to create a
+ symlink to the device.
+
+config IBM_BSR
+ tristate "IBM POWER Barrier Synchronization Register support"
+ depends on PPC_PSERIES
+ help
+ This devices exposes a hardware mechanism for fast synchronization
+ of threads across a large system which avoids bouncing a cacheline
+ between several cores on a system
+
+config POWERNV_OP_PANEL
+ tristate "IBM POWERNV Operator Panel Display support"
+ depends on PPC_POWERNV
+ default m
+ help
+ If you say Y here, a special character device node, /dev/op_panel,
+ will be created which exposes the operator panel display on IBM
+ Power Systems machines with FSPs.
+
+ If you don't require access to the operator panel display from user
+ space, say N.
+
+ If unsure, say M here to build it as a module called powernv-op-panel.
+
+source "drivers/char/ipmi/Kconfig"
+
+config DS1620
+ tristate "NetWinder thermometer support"
+ depends on ARCH_NETWINDER
+ help
+ Say Y here to include support for the thermal management hardware
+ found in the NetWinder. This driver allows the user to control the
+ temperature set points and to read the current temperature.
+
+ It is also possible to say M here to build it as a module (ds1620)
+ It is recommended to be used on a NetWinder, but it is not a
+ necessity.
+
+config NWBUTTON
+ tristate "NetWinder Button"
+ depends on ARCH_NETWINDER
+ help
+ If you say Y here and create a character device node /dev/nwbutton
+ with major and minor numbers 10 and 158 ("man mknod"), then every
+ time the orange button is pressed a number of times, the number of
+ times the button was pressed will be written to that device.
+
+ This is most useful for applications, as yet unwritten, which
+ perform actions based on how many times the button is pressed in a
+ row.
+
+ Do not hold the button down for too long, as the driver does not
+ alter the behaviour of the hardware reset circuitry attached to the
+ button; it will still execute a hard reset if the button is held
+ down for longer than approximately five seconds.
+
+ To compile this driver as a module, choose M here: the
+ module will be called nwbutton.
+
+ Most people will answer Y to this question and "Reboot Using Button"
+ below to be able to initiate a system shutdown from the button.
+
+config NWBUTTON_REBOOT
+ bool "Reboot Using Button"
+ depends on NWBUTTON
+ help
+ If you say Y here, then you will be able to initiate a system
+ shutdown and reboot by pressing the orange button a number of times.
+ The number of presses to initiate the shutdown is two by default,
+ but this can be altered by modifying the value of NUM_PRESSES_REBOOT
+ in nwbutton.h and recompiling the driver or, if you compile the
+ driver as a module, you can specify the number of presses at load
+ time with "insmod button reboot_count=<something>".
+
+config NWFLASH
+ tristate "NetWinder flash support"
+ depends on ARCH_NETWINDER
+ help
+ If you say Y here and create a character device /dev/flash with
+ major 10 and minor 160 you can manipulate the flash ROM containing
+ the NetWinder firmware. Be careful as accidentally overwriting the
+ flash contents can render your computer unbootable. On no account
+ allow random users access to this device. :-)
+
+ To compile this driver as a module, choose M here: the
+ module will be called nwflash.
+
+ If you're not sure, say N.
+
+source "drivers/char/hw_random/Kconfig"
+
+config DTLK
+ tristate "Double Talk PC internal speech card support"
+ depends on ISA
+ help
+ This driver is for the DoubleTalk PC, a speech synthesizer
+ manufactured by RC Systems (<https://www.rcsys.com/>). It is also
+ called the `internal DoubleTalk'.
+
+ To compile this driver as a module, choose M here: the
+ module will be called dtlk.
+
+config XILINX_HWICAP
+ tristate "Xilinx HWICAP Support"
+ depends on MICROBLAZE
+ help
+ This option enables support for Xilinx Internal Configuration
+ Access Port (ICAP) driver. The ICAP is used on Xilinx Virtex
+ FPGA platforms to partially reconfigure the FPGA at runtime.
+
+ If unsure, say N.
+
+config APPLICOM
+ tristate "Applicom intelligent fieldbus card support"
+ depends on PCI
+ help
+ This driver provides the kernel-side support for the intelligent
+ fieldbus cards made by Applicom International. More information
+ about these cards can be found on the WWW at the address
+ <https://www.applicom-int.com/>, or by email from David Woodhouse
+ <dwmw2@infradead.org>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called applicom.
+
+ If unsure, say N.
+
+config SONYPI
+ tristate "Sony Vaio Programmable I/O Control Device support"
+ depends on X86_32 && PCI && INPUT
+ help
+ This driver enables access to the Sony Programmable I/O Control
+ Device which can be found in many (all ?) Sony Vaio laptops.
+
+ If you have one of those laptops, read
+ <file:Documentation/admin-guide/laptops/sonypi.rst>, and say Y or M here.
+
+ To compile this driver as a module, choose M here: the
+ module will be called sonypi.
+
+source "drivers/char/pcmcia/Kconfig"
+
+config MWAVE
+ tristate "ACP Modem (Mwave) support"
+ depends on X86 && TTY
+ select SERIAL_8250
+ help
+ The ACP modem (Mwave) for Linux is a WinModem. It is composed of a
+ kernel driver and a user level application. Together these components
+ support direct attachment to public switched telephone networks (PSTNs)
+ and support selected world wide countries.
+
+ This version of the ACP Modem driver supports the IBM Thinkpad 600E,
+ 600, and 770 that include on board ACP modem hardware.
+
+ The modem also supports the standard communications port interface
+ (ttySx) and is compatible with the Hayes AT Command Set.
+
+ The user level application needed to use this driver can be found at
+ the IBM Linux Technology Center (LTC) web site:
+ <http://www.ibm.com/linux/ltc/>.
+
+ If you own one of the above IBM Thinkpads which has the Mwave chipset
+ in it, say Y.
+
+ To compile this driver as a module, choose M here: the
+ module will be called mwave.
+
+config SCx200_GPIO
+ tristate "NatSemi SCx200 GPIO Support"
+ depends on SCx200
+ select NSC_GPIO
+ help
+ Give userspace access to the GPIO pins on the National
+ Semiconductor SCx200 processors.
+
+ If compiled as a module, it will be called scx200_gpio.
+
+config PC8736x_GPIO
+ tristate "NatSemi PC8736x GPIO Support"
+ depends on X86_32 && !UML
+ default SCx200_GPIO # mostly N
+ select NSC_GPIO # needed for support routines
+ help
+ Give userspace access to the GPIO pins on the National
+ Semiconductor PC-8736x (x=[03456]) SuperIO chip. The chip
+ has multiple functional units, inc several managed by
+ hwmon/pc87360 driver. Tested with PC-87366
+
+ If compiled as a module, it will be called pc8736x_gpio.
+
+config NSC_GPIO
+ tristate "NatSemi Base GPIO Support"
+ depends on X86_32
+ # selected by SCx200_GPIO and PC8736x_GPIO
+ # what about 2 selectors differing: m != y
+ help
+ Common support used (and needed) by scx200_gpio and
+ pc8736x_gpio drivers. If those drivers are built as
+ modules, this one will be too, named nsc_gpio
+
+config DEVMEM
+ bool "/dev/mem virtual device support"
+ default y
+ help
+ Say Y here if you want to support the /dev/mem device.
+ The /dev/mem device is used to access areas of physical
+ memory.
+ When in doubt, say "Y".
+
+config NVRAM
+ tristate "/dev/nvram support"
+ depends on X86 || HAVE_ARCH_NVRAM_OPS
+ default M68K || PPC
+ help
+ If you say Y here and create a character special file /dev/nvram
+ with major number 10 and minor number 144 using mknod ("man mknod"),
+ you get read and write access to the non-volatile memory.
+
+ /dev/nvram may be used to view settings in NVRAM or to change them
+ (with some utility). It could also be used to frequently
+ save a few bits of very important data that may not be lost over
+ power-off and for which writing to disk is too insecure. Note
+ however that most NVRAM space in a PC belongs to the BIOS and you
+ should NEVER idly tamper with it. See Ralf Brown's interrupt list
+ for a guide to the use of CMOS bytes by your BIOS.
+
+ This memory is conventionally called "NVRAM" on PowerPC machines,
+ "CMOS RAM" on PCs, "NVRAM" on Ataris and "PRAM" on Macintoshes.
+
+ To compile this driver as a module, choose M here: the
+ module will be called nvram.
+
+config DEVPORT
+ bool "/dev/port character device"
+ depends on ISA || PCI
+ default y
+ help
+ Say Y here if you want to support the /dev/port device. The /dev/port
+ device is similar to /dev/mem, but for I/O ports.
+
+config HPET
+ bool "HPET - High Precision Event Timer" if (X86 || IA64)
+ default n
+ depends on ACPI
+ help
+ If you say Y here, you will have a miscdevice named "/dev/hpet/". Each
+ open selects one of the timers supported by the HPET. The timers are
+ non-periodic and/or periodic.
+
+config HPET_MMAP
+ bool "Allow mmap of HPET"
+ default y
+ depends on HPET
+ help
+ If you say Y here, user applications will be able to mmap
+ the HPET registers.
+
+config HPET_MMAP_DEFAULT
+ bool "Enable HPET MMAP access by default"
+ default y
+ depends on HPET_MMAP
+ help
+ In some hardware implementations, the page containing HPET
+ registers may also contain other things that shouldn't be
+ exposed to the user. This option selects the default (if
+ kernel parameter hpet_mmap is not set) user access to the
+ registers for applications that require it.
+
+config HANGCHECK_TIMER
+ tristate "Hangcheck timer"
+ depends on X86 || IA64 || PPC64 || S390
+ help
+ The hangcheck-timer module detects when the system has gone
+ out to lunch past a certain margin. It can reboot the system
+ or merely print a warning.
+
+config UV_MMTIMER
+ tristate "UV_MMTIMER Memory mapped RTC for SGI UV"
+ depends on X86_UV
+ default m
+ help
+ The uv_mmtimer device allows direct userspace access to the
+ UV system timer.
+
+source "drivers/char/tpm/Kconfig"
+
+config TELCLOCK
+ tristate "Telecom clock driver for ATCA SBC"
+ depends on X86
+ default n
+ help
+ The telecom clock device is specific to the MPCBL0010 and MPCBL0050
+ ATCA computers and allows direct userspace access to the
+ configuration of the telecom clock configuration settings. This
+ device is used for hardware synchronization across the ATCA backplane
+ fabric. Upon loading, the driver exports a sysfs directory,
+ /sys/devices/platform/telco_clock, with a number of files for
+ controlling the behavior of this hardware.
+
+source "drivers/s390/char/Kconfig"
+
+source "drivers/char/xillybus/Kconfig"
+
+config ADI
+ tristate "SPARC Privileged ADI driver"
+ depends on SPARC64
+ default m
+ help
+ SPARC M7 and newer processors utilize ADI (Application Data
+ Integrity) to version and protect memory. This driver provides
+ read/write access to the ADI versions for privileged processes.
+ This feature is also known as MCD (Memory Corruption Detection)
+ and SSM (Silicon Secured Memory). Intended consumers of this
+ driver include crash and makedumpfile.
+
+config RANDOM_TRUST_CPU
+ bool "Initialize RNG using CPU RNG instructions"
+ default y
+ help
+ Initialize the RNG using random numbers supplied by the CPU's
+ RNG instructions (e.g. RDRAND), if supported and available. These
+ random numbers are never used directly, but are rather hashed into
+ the main input pool, and this happens regardless of whether or not
+ this option is enabled. Instead, this option controls whether the
+ they are credited and hence can initialize the RNG. Additionally,
+ other sources of randomness are always used, regardless of this
+ setting. Enabling this implies trusting that the CPU can supply high
+ quality and non-backdoored random numbers.
+
+ Say Y here unless you have reason to mistrust your CPU or believe
+ its RNG facilities may be faulty. This may also be configured at
+ boot time with "random.trust_cpu=on/off".
+
+config RANDOM_TRUST_BOOTLOADER
+ bool "Initialize RNG using bootloader-supplied seed"
+ default y
+ help
+ Initialize the RNG using a seed supplied by the bootloader or boot
+ environment (e.g. EFI or a bootloader-generated device tree). This
+ seed is not used directly, but is rather hashed into the main input
+ pool, and this happens regardless of whether or not this option is
+ enabled. Instead, this option controls whether the seed is credited
+ and hence can initialize the RNG. Additionally, other sources of
+ randomness are always used, regardless of this setting. Enabling
+ this implies trusting that the bootloader can supply high quality and
+ non-backdoored seeds.
+
+ Say Y here unless you have reason to mistrust your bootloader or
+ believe its RNG facilities may be faulty. This may also be configured
+ at boot time with "random.trust_bootloader=on/off".
+
+endmenu