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This driver supports the SPI controller on the MPC83xx SoC devices from Freescale. Note, this driver supports only the simple shift register SPI controller and not the descriptor based CPM or QUICCEngine SPI controller. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
120 lines
3.9 KiB
Plaintext
120 lines
3.9 KiB
Plaintext
#
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# SPI driver configuration
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#
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# NOTE: the reason this doesn't show SPI slave support is mostly that
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# nobody's needed a slave side API yet. The master-role API is not
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# fully appropriate there, so it'd need some thought to do well.
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#
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menu "SPI support"
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config SPI
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bool "SPI support"
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help
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The "Serial Peripheral Interface" is a low level synchronous
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protocol. Chips that support SPI can have data transfer rates
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up to several tens of Mbit/sec. Chips are addressed with a
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controller and a chipselect. Most SPI slaves don't support
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dynamic device discovery; some are even write-only or read-only.
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SPI is widely used by microcontollers to talk with sensors,
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eeprom and flash memory, codecs and various other controller
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chips, analog to digital (and d-to-a) converters, and more.
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MMC and SD cards can be accessed using SPI protocol; and for
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DataFlash cards used in MMC sockets, SPI must always be used.
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SPI is one of a family of similar protocols using a four wire
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interface (select, clock, data in, data out) including Microwire
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(half duplex), SSP, SSI, and PSP. This driver framework should
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work with most such devices and controllers.
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config SPI_DEBUG
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boolean "Debug support for SPI drivers"
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depends on SPI && DEBUG_KERNEL
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help
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Say "yes" to enable debug messaging (like dev_dbg and pr_debug),
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sysfs, and debugfs support in SPI controller and protocol drivers.
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#
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# MASTER side ... talking to discrete SPI slave chips including microcontrollers
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#
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config SPI_MASTER
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# boolean "SPI Master Support"
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boolean
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default SPI
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help
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If your system has an master-capable SPI controller (which
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provides the clock and chipselect), you can enable that
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controller and the protocol drivers for the SPI slave chips
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that are connected.
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comment "SPI Master Controller Drivers"
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depends on SPI_MASTER
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config SPI_BITBANG
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tristate "Bitbanging SPI master"
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depends on SPI_MASTER && EXPERIMENTAL
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help
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With a few GPIO pins, your system can bitbang the SPI protocol.
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Select this to get SPI support through I/O pins (GPIO, parallel
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port, etc). Or, some systems' SPI master controller drivers use
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this code to manage the per-word or per-transfer accesses to the
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hardware shift registers.
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This is library code, and is automatically selected by drivers that
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need it. You only need to select this explicitly to support driver
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modules that aren't part of this kernel tree.
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config SPI_BUTTERFLY
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tristate "Parallel port adapter for AVR Butterfly (DEVELOPMENT)"
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depends on SPI_MASTER && PARPORT && EXPERIMENTAL
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select SPI_BITBANG
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help
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This uses a custom parallel port cable to connect to an AVR
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Butterfly <http://www.atmel.com/products/avr/butterfly>, an
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inexpensive battery powered microcontroller evaluation board.
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This same cable can be used to flash new firmware.
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config SPI_MPC83xx
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tristate "Freescale MPC83xx SPI controller"
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depends on SPI_MASTER && PPC_83xx && EXPERIMENTAL
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select SPI_BITBANG
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help
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This enables using the Freescale MPC83xx SPI controller in master
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mode.
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Note, this driver uniquely supports the SPI controller on the MPC83xx
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family of PowerPC processors. The MPC83xx uses a simple set of shift
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registers for data (opposed to the CPM based descriptor model).
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config SPI_PXA2XX
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tristate "PXA2xx SSP SPI master"
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depends on SPI_MASTER && ARCH_PXA && EXPERIMENTAL
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help
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This enables using a PXA2xx SSP port as a SPI master controller.
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The driver can be configured to use any SSP port and additional
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documentation can be found a Documentation/spi/pxa2xx.
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#
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# Add new SPI master controllers in alphabetical order above this line
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#
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#
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# There are lots of SPI device types, with sensors and memory
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# being probably the most widely used ones.
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#
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comment "SPI Protocol Masters"
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depends on SPI_MASTER
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#
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# Add new SPI protocol masters in alphabetical order above this line
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#
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# (slave support would go here)
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endmenu # "SPI support"
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