# # 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_IMX tristate "Freescale iMX SPI controller" depends on ARCH_IMX && EXPERIMENTAL help This enables using the Freescale iMX SPI controller in master mode. 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_MPC83xx tristate "Freescale MPC83xx/QUICC Engine SPI controller" depends on (PPC_83xx || QUICC_ENGINE) && EXPERIMENTAL help This enables using the Freescale MPC83xx and QUICC Engine SPI controllers in master mode. Note, this driver uniquely supports the SPI controller on the MPC83xx family of PowerPC processors, plus processors with QUICC Engine technology. 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_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 && 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_AT25 tristate "SPI EEPROMs from most vendors" depends on SYSFS help Enable this driver to get read/write support to most SPI EEPROMs, after you configure the board init code to know about each eeprom on your target board. This driver can also be built as a module. If so, the module will be called at25. 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