2 # SPI driver configuration
4 # NOTE: the reason this doesn't show SPI slave support is mostly that
5 # nobody's needed a slave side API yet. The master-role API is not
6 # fully appropriate there, so it'd need some thought to do well.
13 The "Serial Peripheral Interface" is a low level synchronous
14 protocol. Chips that support SPI can have data transfer rates
15 up to several tens of Mbit/sec. Chips are addressed with a
16 controller and a chipselect. Most SPI slaves don't support
17 dynamic device discovery; some are even write-only or read-only.
19 SPI is widely used by microcontollers to talk with sensors,
20 eeprom and flash memory, codecs and various other controller
21 chips, analog to digital (and d-to-a) converters, and more.
22 MMC and SD cards can be accessed using SPI protocol; and for
23 DataFlash cards used in MMC sockets, SPI must always be used.
25 SPI is one of a family of similar protocols using a four wire
26 interface (select, clock, data in, data out) including Microwire
27 (half duplex), SSP, SSI, and PSP. This driver framework should
28 work with most such devices and controllers.
31 boolean "Debug support for SPI drivers"
32 depends on SPI && DEBUG_KERNEL
34 Say "yes" to enable debug messaging (like dev_dbg and pr_debug),
35 sysfs, and debugfs support in SPI controller and protocol drivers.
38 # MASTER side ... talking to discrete SPI slave chips including microcontrollers
42 # boolean "SPI Master Support"
46 If your system has an master-capable SPI controller (which
47 provides the clock and chipselect), you can enable that
48 controller and the protocol drivers for the SPI slave chips
51 comment "SPI Master Controller Drivers"
55 tristate "Bitbanging SPI master"
56 depends on SPI_MASTER && EXPERIMENTAL
58 With a few GPIO pins, your system can bitbang the SPI protocol.
59 Select this to get SPI support through I/O pins (GPIO, parallel
60 port, etc). Or, some systems' SPI master controller drivers use
61 this code to manage the per-word or per-transfer accesses to the
62 hardware shift registers.
64 This is library code, and is automatically selected by drivers that
65 need it. You only need to select this explicitly to support driver
66 modules that aren't part of this kernel tree.
69 tristate "Parallel port adapter for AVR Butterfly (DEVELOPMENT)"
70 depends on SPI_MASTER && PARPORT && EXPERIMENTAL
73 This uses a custom parallel port cable to connect to an AVR
74 Butterfly <http://www.atmel.com/products/avr/butterfly>, an
75 inexpensive battery powered microcontroller evaluation board.
76 This same cable can be used to flash new firmware.
79 tristate "Freescale MPC83xx SPI controller"
80 depends on SPI_MASTER && PPC_83xx && EXPERIMENTAL
83 This enables using the Freescale MPC83xx SPI controller in master
86 Note, this driver uniquely supports the SPI controller on the MPC83xx
87 family of PowerPC processors. The MPC83xx uses a simple set of shift
88 registers for data (opposed to the CPM based descriptor model).
91 tristate "PXA2xx SSP SPI master"
92 depends on SPI_MASTER && ARCH_PXA && EXPERIMENTAL
94 This enables using a PXA2xx SSP port as a SPI master controller.
95 The driver can be configured to use any SSP port and additional
96 documentation can be found a Documentation/spi/pxa2xx.
98 config SPI_S3C24XX_GPIO
99 tristate "Samsung S3C24XX series SPI by GPIO"
100 depends on SPI_MASTER && ARCH_S3C2410 && SPI_BITBANG && EXPERIMENTAL
102 SPI driver for Samsung S3C24XX series ARM SoCs using
103 GPIO lines to provide the SPI bus. This can be used where
104 the inbuilt hardware cannot provide the transfer mode, or
105 where the board is using non hardware connected pins.
107 # Add new SPI master controllers in alphabetical order above this line
110 tristate "Coldfire Queued SPI"
113 Say Y here to compile in support for the coldfire Queued SPI driver.
114 This driver provides a standard character driver interface, and
115 provides symbols required for some other drivers on the SoM-5282EM.
117 This support is also available as a module. If so, the module
118 will be called mcf_qspi.
121 tristate "DS1305 Real time Clock"
124 Say Y here to compile in support for the qspi stacked DS1305 real
125 time clock driver. This driver stacks on top of the mcf_qspi driver
126 and provides a misc RTC driver, which takes the standard RTC minor
129 This support is also available as a module. If so, the module will
134 tristate "Samsung S3C24XX series SPI"
135 depends on SPI_MASTER && ARCH_S3C2410 && EXPERIMENTAL
137 SPI driver for Samsung S3C24XX series ARM SoCs
140 # There are lots of SPI device types, with sensors and memory
141 # being probably the most widely used ones.
143 comment "SPI Protocol Masters"
144 depends on SPI_MASTER
148 # Add new SPI protocol masters in alphabetical order above this line
152 # (slave support would go here)
154 endmenu # "SPI support"