| # |
| # 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. |
| # |
| menu "SPI support" |
| |
| config SPI |
| bool "SPI support" |
| 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 microcontollers 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. |
| |
| config SPI_DEBUG |
| boolean "Debug support for SPI drivers" |
| depends on SPI && 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. |
| |
| comment "SPI Master Controller Drivers" |
| depends on SPI_MASTER |
| |
| config SPI_BITBANG |
| tristate "Bitbanging SPI master" |
| depends on SPI_MASTER && EXPERIMENTAL |
| 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 SPI_MASTER && PARPORT && EXPERIMENTAL |
| 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_MPC83xx |
| tristate "Freescale MPC83xx SPI controller" |
| depends on SPI_MASTER && PPC_83xx && EXPERIMENTAL |
| select SPI_BITBANG |
| help |
| This enables using the Freescale MPC83xx SPI controller in master |
| mode. |
| |
| Note, this driver uniquely supports the SPI controller on the MPC83xx |
| family of PowerPC processors. The MPC83xx uses a simple set of shift |
| registers for data (opposed to the CPM based descriptor model). |
| |
| config SPI_PXA2XX |
| tristate "PXA2xx SSP SPI master" |
| depends on SPI_MASTER && ARCH_PXA && EXPERIMENTAL |
| 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_GPIO |
| tristate "Samsung S3C24XX series SPI by GPIO" |
| depends on SPI_MASTER && ARCH_S3C2410 && SPI_BITBANG && EXPERIMENTAL |
| 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. |
| # |
| # Add new SPI master controllers in alphabetical order above this line |
| # |
| |
| |
| config SPI_S3C24XX |
| tristate "Samsung S3C24XX series SPI" |
| depends on SPI_MASTER && ARCH_S3C2410 && EXPERIMENTAL |
| help |
| SPI driver for Samsung S3C24XX series ARM SoCs |
| |
| # |
| # There are lots of SPI device types, with sensors and memory |
| # being probably the most widely used ones. |
| # |
| comment "SPI Protocol Masters" |
| depends on SPI_MASTER |
| |
| |
| # |
| # Add new SPI protocol masters in alphabetical order above this line |
| # |
| |
| |
| # (slave support would go here) |
| |
| endmenu # "SPI support" |
| |