Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 577 insertions, 0 deletions

diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
new file mode 100644
index 0000000000..ee17cf5c44
--- /dev/null
+++ b/drivers/tty/serial/8250/Kconfig
@@ -0,0 +1,577 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# The 8250/16550 serial drivers.  You shouldn't be in this list unless
+# you somehow have an implicit or explicit dependency on SERIAL_8250.
+#
+
+config SERIAL_8250
+	tristate "8250/16550 and compatible serial support"
+	depends on !S390
+	select SERIAL_CORE
+	select SERIAL_MCTRL_GPIO if GPIOLIB
+	help
+	  This selects whether you want to include the driver for the standard
+	  serial ports.  The standard answer is Y.  People who might say N
+	  here are those that are setting up dedicated Ethernet WWW/FTP
+	  servers, or users that have one of the various bus mice instead of a
+	  serial mouse and don't intend to use their machine's standard serial
+	  port for anything.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called 8250.
+	  [WARNING: Do not compile this driver as a module if you are using
+	  non-standard serial ports, since the configuration information will
+	  be lost when the driver is unloaded.  This limitation may be lifted
+	  in the future.]
+
+	  BTW1: If you have a mouseman serial mouse which is not recognized by
+	  the X window system, try running gpm first.
+
+	  BTW2: If you intend to use a software modem (also called Winmodem)
+	  under Linux, forget it.  These modems are crippled and require
+	  proprietary drivers which are only available under Windows.
+
+	  Most people will say Y or M here, so that they can use serial mice,
+	  modems and similar devices connecting to the standard serial ports.
+
+config SERIAL_8250_DEPRECATED_OPTIONS
+	bool "Support 8250_core.* kernel options (DEPRECATED)"
+	depends on SERIAL_8250
+	default y
+	help
+	  In 3.7 we renamed 8250 to 8250_core by mistake, so now we have to
+	  accept kernel parameters in both forms like 8250_core.nr_uarts=4 and
+	  8250.nr_uarts=4. We now renamed the module back to 8250, but if
+	  anybody noticed in 3.7 and changed their userspace we still have to
+	  keep the 8250_core.* options around until they revert the changes
+	  they already did.
+
+	  If 8250 is built as a module, this adds 8250_core alias instead. 
+
+	  If you did not notice yet and/or you have userspace from pre-3.7, it
+	  is safe (and recommended) to say N here.
+
+config SERIAL_8250_PNP
+	bool "8250/16550 PNP device support" if EXPERT
+	depends on SERIAL_8250 && PNP
+	default y
+	help
+	  This builds standard PNP serial support. You may be able to
+	  disable this feature if you only need legacy serial support.
+
+config SERIAL_8250_16550A_VARIANTS
+	bool "Support for variants of the 16550A serial port"
+	depends on SERIAL_8250
+	default !X86
+	help
+	  The 8250 driver can probe for many variants of the venerable 16550A
+	  serial port. Doing so takes additional time at boot.
+
+	  On modern systems, especially those using serial only for a simple
+	  console, you can say N here.
+
+config SERIAL_8250_FINTEK
+	bool "Support for Fintek variants"
+	depends on SERIAL_8250
+	help
+	  Selecting this option will add support for the RS232 and RS485
+	  capabilities of the Fintek F81216A LPC to 4 UART as well similar
+	  variants.
+
+	  If this option is not selected the device will be configured as a
+	  standard 16550A serial port, however the device may not function
+	  correctly without this option enabled.
+
+	  If unsure, say N.
+
+config SERIAL_8250_CONSOLE
+	bool "Console on 8250/16550 and compatible serial port"
+	depends on SERIAL_8250=y
+	select SERIAL_CORE_CONSOLE
+	select SERIAL_EARLYCON
+	help
+	  If you say Y here, it will be possible to use a serial port 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). This could be useful if some terminal or printer is connected
+	  to that serial port.
+
+	  Even if you say Y here, the currently visible virtual 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=ttyS1". (Try "man bootparam" or see the documentation of
+	  your boot loader (grub or lilo or loadlin) about how to pass options
+	  to the kernel at boot time.)
+
+	  If you don't have a VGA card installed and you say Y here, the
+	  kernel will automatically use the first serial line, /dev/ttyS0, as
+	  system console.
+
+	  You can set that using a kernel command line option such as
+	  "console=uart8250,io,0x3f8,9600n8"
+	  "console=uart8250,mmio,0xff5e0000,115200n8".
+	  and it will switch to normal serial console when the corresponding
+	  port is ready.
+	  "earlycon=uart8250,io,0x3f8,9600n8"
+	  "earlycon=uart8250,mmio,0xff5e0000,115200n8".
+	  it will not only setup early console.
+
+	  If unsure, say N.
+
+config SERIAL_8250_PARISC
+	tristate
+	depends on SERIAL_8250 && PARISC
+	default SERIAL_8250
+
+config SERIAL_8250_DMA
+	bool "DMA support for 16550 compatible UART controllers" if EXPERT
+	depends on SERIAL_8250 && DMADEVICES=y
+	default SERIAL_8250
+	help
+	  This builds DMA support that can be used with 8250/16650
+	  compatible UART controllers that support DMA signaling.
+
+config SERIAL_8250_PCILIB
+	bool
+
+config SERIAL_8250_PCI
+	tristate "8250/16550 PCI device support"
+	depends on SERIAL_8250 && PCI
+	select SERIAL_8250_PCILIB
+	default SERIAL_8250
+	help
+	  This builds standard PCI serial support. You may be able to
+	  disable this feature if you only need legacy serial support.
+	  Saves about 9K.
+	  Note that serial ports on NetMos 9835 Multi-I/O cards are handled
+	  by the parport_serial driver, enabled with CONFIG_PARPORT_SERIAL.
+
+config SERIAL_8250_EXAR
+	tristate "8250/16550 Exar/Commtech PCI/PCIe device support"
+	depends on SERIAL_8250_PCI
+	default SERIAL_8250
+	help
+	  This builds support for XR17C1xx, XR17V3xx and some Commtech
+	  422x PCIe serial cards that are not covered by the more generic
+	  SERIAL_8250_PCI option.
+
+config SERIAL_8250_HP300
+	tristate
+	depends on SERIAL_8250 && HP300
+	default SERIAL_8250
+
+config SERIAL_8250_CS
+	tristate "8250/16550 PCMCIA device support"
+	depends on PCMCIA && SERIAL_8250
+	help
+	  Say Y here to enable support for 16-bit PCMCIA serial devices,
+	  including serial port cards, modems, and the modem functions of
+	  multi-function Ethernet/modem cards. (PCMCIA- or PC-cards are
+	  credit-card size devices often used with laptops.)
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called serial_cs.
+
+	  If unsure, say N.
+
+config SERIAL_8250_MEN_MCB
+	tristate "MEN MCB UART device support"
+	depends on MCB && SERIAL_8250
+	help
+	  This enables support for FPGA based UARTs found on many MEN
+	  boards. This driver enables support for the 16z025, 16z057
+	  and 16z125 UARTs.
+
+	  To compile this driver as a module, chose M here: the
+	  module will be called 8250_men_mcb.
+
+
+config SERIAL_8250_NR_UARTS
+	int "Maximum number of 8250/16550 serial ports"
+	depends on SERIAL_8250
+	default "4"
+	help
+	  Set this to the number of serial ports you want the driver
+	  to support.  This includes any ports discovered via ACPI or
+	  PCI enumeration and any ports that may be added at run-time
+	  via hot-plug, or any ISA multi-port serial cards.
+
+config SERIAL_8250_RUNTIME_UARTS
+	int "Number of 8250/16550 serial ports to register at runtime"
+	depends on SERIAL_8250
+	range 0 SERIAL_8250_NR_UARTS
+	default "4"
+	help
+	  Set this to the maximum number of serial ports you want
+	  the kernel to register at boot time.  This can be overridden
+	  with the module parameter "nr_uarts", or boot-time parameter
+	  8250.nr_uarts
+
+config SERIAL_8250_EXTENDED
+	bool "Extended 8250/16550 serial driver options"
+	depends on SERIAL_8250
+	help
+	  If you wish to use any non-standard features of the standard "dumb"
+	  driver, say Y here. This includes HUB6 support, shared serial
+	  interrupts, special multiport support, support for more than the
+	  four COM 1/2/3/4 boards, etc.
+
+	  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 serial driver options. If unsure, say N.
+
+config SERIAL_8250_MANY_PORTS
+	bool "Support more than 4 legacy serial ports"
+	depends on SERIAL_8250_EXTENDED && !IA64
+	help
+	  Say Y here if you have dumb serial boards other than the four
+	  standard COM 1/2/3/4 ports. This may happen if you have an AST
+	  FourPort, Accent Async, Boca (read the Boca mini-HOWTO, available
+	  from <https://www.tldp.org/docs.html#howto>), or other custom
+	  serial port hardware which acts similar to standard serial port
+	  hardware. If you only use the standard COM 1/2/3/4 ports, you can
+	  say N here to save some memory. You can also say Y if you have an
+	  "intelligent" multiport card such as Digiboards, etc.
+
+#
+# Multi-port serial cards
+#
+
+config SERIAL_8250_FOURPORT
+	tristate "Support Fourport cards"
+	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
+	help
+	  Say Y here if you have an AST FourPort serial board.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called 8250_fourport.
+
+config SERIAL_8250_ACCENT
+	tristate "Support Accent cards"
+	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
+	help
+	  Say Y here if you have an Accent Async serial board.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called 8250_accent.
+
+config SERIAL_8250_ASPEED_VUART
+	tristate "Aspeed Virtual UART"
+	depends on SERIAL_8250
+	depends on OF
+	depends on MFD_SYSCON
+	depends on ARCH_ASPEED || COMPILE_TEST
+	select REGMAP
+	help
+	  If you want to use the virtual UART (VUART) device on Aspeed
+	  BMC platforms, enable this option. This enables the 16550A-
+	  compatible device on the local LPC bus, giving a UART device
+	  with no physical RS232 connections.
+
+config SERIAL_8250_BOCA
+	tristate "Support Boca cards"
+	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
+	help
+	  Say Y here if you have a Boca serial board.  Please read the Boca
+	  mini-HOWTO, available from <https://www.tldp.org/docs.html#howto>
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called 8250_boca.
+
+config SERIAL_8250_EXAR_ST16C554
+	tristate "Support Exar ST16C554/554D Quad UART"
+	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
+	help
+	  The Uplogix Envoy TU301 uses this Exar Quad UART.  If you are
+	  tinkering with your Envoy TU301, or have a machine with this UART,
+	  say Y here.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called 8250_exar_st16c554.
+
+config SERIAL_8250_HUB6
+	tristate "Support Hub6 cards"
+	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
+	help
+	  Say Y here if you have a HUB6 serial board.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called 8250_hub6.
+
+config SERIAL_8250_PCI1XXXX
+	tristate "Microchip 8250 based serial port"
+	depends on SERIAL_8250 && PCI
+	select SERIAL_8250_PCILIB
+	help
+	 Select this option if you have a setup with Microchip PCIe
+	 Switch with serial port enabled and wish to enable 8250
+	 serial driver for the serial interface. This driver support
+	 will ensure to support baud rates upto 1.5Mpbs.
+
+#
+# Misc. options/drivers.
+#
+
+config SERIAL_8250_SHARE_IRQ
+	bool "Support for sharing serial interrupts"
+	depends on SERIAL_8250_EXTENDED
+	help
+	  Some serial boards have hardware support which allows multiple dumb
+	  serial ports on the same board to share a single IRQ. To enable
+	  support for this in the serial driver, say Y here.
+
+config SERIAL_8250_DETECT_IRQ
+	bool "Autodetect IRQ on standard ports (unsafe)"
+	depends on SERIAL_8250_EXTENDED
+	help
+	  Say Y here if you want the kernel to try to guess which IRQ
+	  to use for your serial port.
+
+	  This is considered unsafe; it is far better to configure the IRQ in
+	  a boot script using the setserial command.
+
+	  If unsure, say N.
+
+config SERIAL_8250_RSA
+	bool "Support RSA serial ports"
+	depends on SERIAL_8250_EXTENDED
+	help
+	  Say Y here if you have a IODATA RSA-DV II/S ISA card and
+	  would like to use its >115kbps speeds.
+	  You will need to provide module parameter "probe_rsa", or boot-time
+	  parameter 8250.probe_rsa with I/O addresses of this card then.
+
+	  If you don't have such card, or if unsure, say N.
+
+config SERIAL_8250_DWLIB
+	bool
+
+config SERIAL_8250_ACORN
+	tristate "Acorn expansion card serial port support"
+	depends on ARCH_ACORN && SERIAL_8250
+	help
+	  If you have an Atomwide Serial card or Serial Port card for an Acorn
+	  system, say Y to this option.  The driver can handle 1, 2, or 3 port
+	  cards.  If unsure, say N.
+
+config SERIAL_8250_BCM2835AUX
+	tristate "BCM2835 auxiliar mini UART support"
+	depends on ARCH_BCM2835 || COMPILE_TEST
+	depends on SERIAL_8250 && SERIAL_8250_SHARE_IRQ
+	help
+	  Support for the BCM2835 auxiliar mini UART.
+
+	  Features and limitations of the UART are
+	    Registers are similar to 16650 registers,
+	      set bits in the control registers that are unsupported
+	      are ignored and read back as 0
+	    7/8 bit operation with 1 start and 1 stop bit
+	    8 symbols deep fifo for rx and tx
+	    SW controlled RTS and SW readable CTS
+	    Clock rate derived from system clock
+	    Uses 8 times oversampling (compared to 16 times for 16650)
+	    Missing break detection (but break generation)
+	    Missing framing error detection
+	    Missing parity bit
+	    Missing receive time-out interrupt
+	    Missing DCD, DSR, DTR and RI signals
+
+	  If unsure, say N.
+
+config SERIAL_8250_FSL
+	tristate "Freescale 16550 UART support" if COMPILE_TEST && !(PPC || ARM || ARM64)
+	depends on SERIAL_8250
+	default SERIAL_8250 if PPC || ARM || ARM64
+	help
+	  Selecting this option enables a workaround for a break-detection
+	  erratum for Freescale 16550 UARTs in the 8250 driver. It also
+	  enables support for ACPI enumeration.
+
+config SERIAL_8250_DFL
+	tristate "DFL bus driver for Altera 16550 UART"
+	depends on SERIAL_8250 && FPGA_DFL
+	help
+	  This option enables support for a Device Feature List (DFL) bus
+	  driver for the Altera 16550 UART. One or more Altera 16550 UARTs
+	  can be instantiated in a FPGA and then be discovered during
+	  enumeration of the DFL bus.
+
+	  To compile this driver as a module, chose M here: the
+	  module will be called 8250_dfl.
+
+config SERIAL_8250_DW
+	tristate "Support for Synopsys DesignWare 8250 quirks"
+	depends on SERIAL_8250
+	select SERIAL_8250_DWLIB
+	help
+	  Selecting this option will enable handling of the extra features
+	  present in the Synopsys DesignWare APB UART.
+
+config SERIAL_8250_EM
+	tristate "Support for Emma Mobile integrated serial port"
+	depends on SERIAL_8250 && HAVE_CLK
+	depends on ARCH_RENESAS || COMPILE_TEST
+	help
+	  Selecting this option will add support for the integrated serial
+	  port hardware found on the Emma Mobile line of processors.
+	  If unsure, say N.
+
+config SERIAL_8250_IOC3
+	tristate "SGI IOC3 8250 UART support"
+	depends on SERIAL_8250
+	depends on SGI_MFD_IOC3 || COMPILE_TEST
+	select SERIAL_8250_EXTENDED
+	select SERIAL_8250_SHARE_IRQ
+	help
+	  Enable this if you have a SGI Origin or Octane machine. This module
+	  provides basic serial support by directly driving the UART chip
+	  behind the IOC3 device on those systems.  Maximum baud speed is
+	  38400bps using this driver.
+
+config SERIAL_8250_RT288X
+	bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support"
+	depends on SERIAL_8250
+	default y if MIPS_ALCHEMY || SOC_RT288X || SOC_RT305X || SOC_RT3883 || SOC_MT7620
+	help
+	  Selecting this option will add support for the alternate register
+	  layout used by Ralink RT288x/RT305x, Alchemy Au1xxx, and some others.
+	  If unsure, say N.
+
+config SERIAL_8250_OMAP
+	tristate "Support for OMAP internal UART (8250 based driver)"
+	depends on SERIAL_8250
+	depends on ARCH_OMAP2PLUS || ARCH_K3 || COMPILE_TEST
+	help
+	  If you have a machine based on an Texas Instruments OMAP CPU you
+	  can enable its onboard serial ports by enabling this option.
+
+	  This driver uses ttyS instead of ttyO.
+
+config SERIAL_8250_OMAP_TTYO_FIXUP
+	bool "Replace ttyO with ttyS"
+	depends on SERIAL_8250_OMAP=y && SERIAL_8250_CONSOLE
+	default y
+	help
+	  This option replaces the "console=ttyO" argument with the matching
+	  ttyS argument if the user did not specified it on the command line.
+	  This ensures that the user can see the kernel output during boot
+	  which he wouldn't see otherwise. The getty has still to be configured
+	  for ttyS instead of ttyO regardless of this option.
+	  This option is intended for people who "automatically" enable this
+	  driver without knowing that this driver requires a different console=
+	  argument. If you read this, please keep this option disabled and
+	  instead update your kernel command line. If you prepare a kernel for a
+	  distribution or other kind of larger user base then you probably want
+	  to keep this option enabled. Otherwise people might complain about a
+	  not booting kernel because the serial console remains silent in case
+	  they forgot to update the command line.
+
+config SERIAL_8250_LPC18XX
+	tristate "NXP LPC18xx/43xx serial port support"
+	depends on SERIAL_8250 && OF && (ARCH_LPC18XX || COMPILE_TEST)
+	default ARCH_LPC18XX
+	help
+	  If you have a LPC18xx/43xx based board and want to use the
+	  serial port, say Y to this option. If unsure, say Y.
+
+config SERIAL_8250_MT6577
+	tristate "Mediatek serial port support"
+	depends on SERIAL_8250
+	depends on ARCH_MEDIATEK || COMPILE_TEST
+	help
+	  If you have a Mediatek based board and want to use the
+	  serial port, say Y to this option. If unsure, say N.
+
+config SERIAL_8250_UNIPHIER
+	tristate "Support for UniPhier on-chip UART"
+	depends on SERIAL_8250
+	depends on ARCH_UNIPHIER || COMPILE_TEST
+	help
+	  If you have a UniPhier based board and want to use the on-chip
+	  serial ports, say Y to this option. If unsure, say N.
+
+config SERIAL_8250_INGENIC
+	tristate "Support for Ingenic SoC serial ports"
+	depends on SERIAL_8250
+	depends on OF_FLATTREE
+	depends on MIPS || COMPILE_TEST
+	help
+	  If you have a system using an Ingenic SoC and wish to make use of
+	  its UARTs, say Y to this option. If unsure, say N.
+
+config SERIAL_8250_LPSS
+	tristate "Support for serial ports on Intel LPSS platforms"
+	default SERIAL_8250
+	depends on SERIAL_8250 && PCI
+	depends on X86 || COMPILE_TEST
+	select SERIAL_8250_DWLIB
+	select DW_DMAC_CORE if SERIAL_8250_DMA
+	select DW_DMAC_PCI if (SERIAL_8250_DMA && X86_INTEL_LPSS)
+	select RATIONAL
+	help
+	  Selecting this option will enable handling of the UART found on
+	  various Intel platforms such as:
+	    - Intel Baytrail SoC
+	    - Intel Braswell SoC
+	    - Intel Quark X1000 SoC
+	  that are not covered by the more generic SERIAL_8250_PCI option.
+
+config SERIAL_8250_MID
+	tristate "Support for serial ports on Intel MID platforms"
+	default SERIAL_8250
+	depends on SERIAL_8250 && PCI
+	depends on X86 || COMPILE_TEST
+	select HSU_DMA if SERIAL_8250_DMA
+	select HSU_DMA_PCI if (HSU_DMA && X86_INTEL_MID)
+	select RATIONAL
+	help
+	  Selecting this option will enable handling of the UART found on
+	  Intel Medfield SOC and various other Intel platforms that is not
+	  covered by the more generic SERIAL_8250_PCI option.
+
+config SERIAL_8250_PERICOM
+	tristate "Support for Pericom and Acces I/O serial ports"
+	default SERIAL_8250
+	depends on SERIAL_8250 && PCI
+	help
+	  Selecting this option will enable handling of the Pericom and Acces
+	  I/O UARTs that are not covered by the more generic SERIAL_8250_PCI
+	  option.
+
+config SERIAL_8250_PXA
+	tristate "PXA serial port support"
+	depends on SERIAL_8250
+	depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
+	help
+	  If you have a machine based on an Intel XScale PXA2xx CPU you can
+	  enable its onboard serial ports by enabling this option. The option is
+	  applicable to both devicetree and legacy boards, and early console is
+	  part of its support.
+
+config SERIAL_8250_TEGRA
+	tristate "8250 support for Tegra serial ports"
+	default SERIAL_8250
+	depends on SERIAL_8250
+	depends on ARCH_TEGRA || COMPILE_TEST
+	help
+	  Select this option if you have machine with an NVIDIA Tegra SoC and
+	  wish to enable 8250 serial driver for the Tegra serial interfaces.
+
+config SERIAL_8250_BCM7271
+	tristate "Broadcom 8250 based serial port"
+	depends on SERIAL_8250 && (ARCH_BRCMSTB || COMPILE_TEST)
+	default ARCH_BRCMSTB
+	help
+	  If you have a Broadcom STB based board and want to use the
+	  enhanced features of the Broadcom 8250 based serial port,
+	  including DMA support and high accuracy BAUD rates, say
+	  Y to this option. If unsure, say N.
+
+config SERIAL_OF_PLATFORM
+	tristate "Devicetree based probing for 8250 ports"
+	depends on SERIAL_8250 && OF
+	help
+	  This option is used for all 8250 compatible serial ports that
+	  are probed through devicetree, including Open Firmware based
+	  PowerPC systems and embedded systems on architectures using the
+	  flattened device tree format.