| # | |
| # 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" | |