xref: /linux/drivers/spi/Kconfig (revision 44dab88e7cc99d1d2caa9a8936e09d9a98a6761a)

#
# SPI driver configuration
#
# NOTE:  the reason this doesn't show SPI slave support is mostly that
# nobody's needed a slave side API yet.  The master-role API is not
# fully appropriate there, so it'd need some thought to do well.
#
menuconfig SPI
	bool "SPI support"
	depends on HAS_IOMEM
	help
	  The "Serial Peripheral Interface" is a low level synchronous
	  protocol.  Chips that support SPI can have data transfer rates
	  up to several tens of Mbit/sec.  Chips are addressed with a
	  controller and a chipselect.  Most SPI slaves don't support
	  dynamic device discovery; some are even write-only or read-only.

	  SPI is widely used by microcontrollers to talk with sensors,
	  eeprom and flash memory, codecs and various other controller
	  chips, analog to digital (and d-to-a) converters, and more.
	  MMC and SD cards can be accessed using SPI protocol; and for
	  DataFlash cards used in MMC sockets, SPI must always be used.

	  SPI is one of a family of similar protocols using a four wire
	  interface (select, clock, data in, data out) including Microwire
	  (half duplex), SSP, SSI, and PSP.  This driver framework should
	  work with most such devices and controllers.

if SPI

config SPI_DEBUG
	boolean "Debug support for SPI drivers"
	depends on DEBUG_KERNEL
	help
	  Say "yes" to enable debug messaging (like dev_dbg and pr_debug),
	  sysfs, and debugfs support in SPI controller and protocol drivers.

#
# MASTER side ... talking to discrete SPI slave chips including microcontrollers
#

config SPI_MASTER
#	boolean "SPI Master Support"
	boolean
	default SPI
	help
	  If your system has an master-capable SPI controller (which
	  provides the clock and chipselect), you can enable that
	  controller and the protocol drivers for the SPI slave chips
	  that are connected.

if SPI_MASTER

comment "SPI Master Controller Drivers"

config SPI_ATMEL
	tristate "Atmel SPI Controller"
	depends on (ARCH_AT91 || AVR32)
	help
	  This selects a driver for the Atmel SPI Controller, present on
	  many AT32 (AVR32) and AT91 (ARM) chips.

config SPI_BFIN
	tristate "SPI controller driver for ADI Blackfin5xx"
	depends on BLACKFIN
	help
	  This is the SPI controller master driver for Blackfin 5xx processor.

config SPI_AU1550
	tristate "Au1550/Au12x0 SPI Controller"
	depends on (SOC_AU1550 || SOC_AU1200) && EXPERIMENTAL
	select SPI_BITBANG
	help
	  If you say yes to this option, support will be included for the
	  Au1550 SPI controller (may also work with Au1200,Au1210,Au1250).

	  This driver can also be built as a module.  If so, the module
	  will be called au1550_spi.

config SPI_BITBANG
	tristate "Utilities for Bitbanging SPI masters"
	help
	  With a few GPIO pins, your system can bitbang the SPI protocol.
	  Select this to get SPI support through I/O pins (GPIO, parallel
	  port, etc).  Or, some systems' SPI master controller drivers use
	  this code to manage the per-word or per-transfer accesses to the
	  hardware shift registers.

	  This is library code, and is automatically selected by drivers that
	  need it.  You only need to select this explicitly to support driver
	  modules that aren't part of this kernel tree.

config SPI_BUTTERFLY
	tristate "Parallel port adapter for AVR Butterfly (DEVELOPMENT)"
	depends on PARPORT
	select SPI_BITBANG
	help
	  This uses a custom parallel port cable to connect to an AVR
	  Butterfly <http://www.atmel.com/products/avr/butterfly>, an
	  inexpensive battery powered microcontroller evaluation board.
	  This same cable can be used to flash new firmware.

config SPI_GPIO
	tristate "GPIO-based bitbanging SPI Master"
	depends on GENERIC_GPIO
	select SPI_BITBANG
	help
	  This simple GPIO bitbanging SPI master uses the arch-neutral GPIO
	  interface to manage MOSI, MISO, SCK, and chipselect signals.  SPI
	  slaves connected to a bus using this driver are configured as usual,
	  except that the spi_board_info.controller_data holds the GPIO number
	  for the chipselect used by this controller driver.

	  Note that this driver often won't achieve even 1 Mbit/sec speeds,
	  making it unusually slow for SPI.  If your platform can inline
	  GPIO operations, you should be able to leverage that for better
	  speed with a custom version of this driver; see the source code.

config SPI_LM70_LLP
	tristate "Parallel port adapter for LM70 eval board (DEVELOPMENT)"
	depends on PARPORT && EXPERIMENTAL
	select SPI_BITBANG
	help
	  This driver supports the NS LM70 LLP Evaluation Board,
	  which interfaces to an LM70 temperature sensor using
	  a parallel port.

config SPI_MPC52xx_PSC
	tristate "Freescale MPC52xx PSC SPI controller"
	depends on PPC_MPC52xx && EXPERIMENTAL
	help
	  This enables using the Freescale MPC52xx Programmable Serial
	  Controller in master SPI mode.

config SPI_MPC8xxx
	tristate "Freescale MPC8xxx SPI controller"
	depends on FSL_SOC
	help
	  This enables using the Freescale MPC8xxx SPI controllers in master
	  mode.

	  This driver uses a simple set of shift registers for data (opposed
	  to the CPM based descriptor model).

config SPI_OMAP_UWIRE
	tristate "OMAP1 MicroWire"
	depends on ARCH_OMAP1
	select SPI_BITBANG
	help
	  This hooks up to the MicroWire controller on OMAP1 chips.

config SPI_OMAP24XX
	tristate "McSPI driver for OMAP24xx/OMAP34xx"
	depends on ARCH_OMAP24XX || ARCH_OMAP34XX
	help
	  SPI master controller for OMAP24xx/OMAP34xx Multichannel SPI
	  (McSPI) modules.

config SPI_ORION
	tristate "Orion SPI master (EXPERIMENTAL)"
	depends on PLAT_ORION && EXPERIMENTAL
	help
	  This enables using the SPI master controller on the Orion chips.

config SPI_PL022
	tristate "ARM AMBA PL022 SSP controller (EXPERIMENTAL)"
	depends on ARM_AMBA && EXPERIMENTAL
	default y if MACH_U300
	help
	  This selects the ARM(R) AMBA(R) PrimeCell PL022 SSP
	  controller. If you have an embedded system with an AMBA(R)
	  bus and a PL022 controller, say Y or M here.

config SPI_PPC4xx
	tristate "PPC4xx SPI Controller"
	depends on PPC32 && 4xx && SPI_MASTER
	select SPI_BITBANG
	help
	  This selects a driver for the PPC4xx SPI Controller.

config SPI_PXA2XX
	tristate "PXA2xx SSP SPI master"
	depends on ARCH_PXA && EXPERIMENTAL
	select PXA_SSP
	help
	  This enables using a PXA2xx SSP port as a SPI master controller.
	  The driver can be configured to use any SSP port and additional
	  documentation can be found a Documentation/spi/pxa2xx.

config SPI_S3C24XX
	tristate "Samsung S3C24XX series SPI"
	depends on ARCH_S3C2410 && EXPERIMENTAL
	select SPI_BITBANG
	help
	  SPI driver for Samsung S3C24XX series ARM SoCs

config SPI_S3C24XX_GPIO
	tristate "Samsung S3C24XX series SPI by GPIO"
	depends on ARCH_S3C2410 && EXPERIMENTAL
	select SPI_BITBANG
	help
	  SPI driver for Samsung S3C24XX series ARM SoCs using
	  GPIO lines to provide the SPI bus. This can be used where
	  the inbuilt hardware cannot provide the transfer mode, or
	  where the board is using non hardware connected pins.

config SPI_SH_SCI
	tristate "SuperH SCI SPI controller"
	depends on SUPERH
	select SPI_BITBANG
	help
	  SPI driver for SuperH SCI blocks.

config SPI_TXX9
	tristate "Toshiba TXx9 SPI controller"
	depends on GENERIC_GPIO && CPU_TX49XX
	help
	  SPI driver for Toshiba TXx9 MIPS SoCs

config SPI_XILINX
	tristate "Xilinx SPI controller"
	depends on (XILINX_VIRTEX || MICROBLAZE) && EXPERIMENTAL
	select SPI_BITBANG
	help
	  This exposes the SPI controller IP from the Xilinx EDK.

	  See the "OPB Serial Peripheral Interface (SPI) (v1.00e)"
	  Product Specification document (DS464) for hardware details.

#
# Add new SPI master controllers in alphabetical order above this line
#

#
# There are lots of SPI device types, with sensors and memory
# being probably the most widely used ones.
#
comment "SPI Protocol Masters"

config SPI_SPIDEV
	tristate "User mode SPI device driver support"
	depends on EXPERIMENTAL
	help
	  This supports user mode SPI protocol drivers.

	  Note that this application programming interface is EXPERIMENTAL
	  and hence SUBJECT TO CHANGE WITHOUT NOTICE while it stabilizes.

config SPI_TLE62X0
	tristate "Infineon TLE62X0 (for power switching)"
	depends on SYSFS
	help
	  SPI driver for Infineon TLE62X0 series line driver chips,
	  such as the TLE6220, TLE6230 and TLE6240.  This provides a
	  sysfs interface, with each line presented as a kind of GPIO
	  exposing both switch control and diagnostic feedback.

#
# Add new SPI protocol masters in alphabetical order above this line
#

endif # SPI_MASTER

# (slave support would go here)

endif # SPI