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 microcontrollers 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 "Atmel SPI Controller"
56 depends on (ARCH_AT91 || AVR32) && SPI_MASTER
58 This selects a driver for the Atmel SPI Controller, present on
59 many AT32 (AVR32) and AT91 (ARM) chips.
62 tristate "Bitbanging SPI master"
63 depends on SPI_MASTER && EXPERIMENTAL
65 With a few GPIO pins, your system can bitbang the SPI protocol.
66 Select this to get SPI support through I/O pins (GPIO, parallel
67 port, etc). Or, some systems' SPI master controller drivers use
68 this code to manage the per-word or per-transfer accesses to the
69 hardware shift registers.
71 This is library code, and is automatically selected by drivers that
72 need it. You only need to select this explicitly to support driver
73 modules that aren't part of this kernel tree.
76 tristate "Parallel port adapter for AVR Butterfly (DEVELOPMENT)"
77 depends on SPI_MASTER && PARPORT && EXPERIMENTAL
80 This uses a custom parallel port cable to connect to an AVR
81 Butterfly <http://www.atmel.com/products/avr/butterfly>, an
82 inexpensive battery powered microcontroller evaluation board.
83 This same cable can be used to flash new firmware.
86 tristate "Freescale iMX SPI controller"
87 depends on SPI_MASTER && ARCH_IMX && EXPERIMENTAL
89 This enables using the Freescale iMX SPI controller in master
93 tristate "Freescale MPC83xx SPI controller"
94 depends on SPI_MASTER && PPC_83xx && EXPERIMENTAL
97 This enables using the Freescale MPC83xx SPI controller in master
100 Note, this driver uniquely supports the SPI controller on the MPC83xx
101 family of PowerPC processors. The MPC83xx uses a simple set of shift
102 registers for data (opposed to the CPM based descriptor model).
104 config SPI_OMAP_UWIRE
105 tristate "OMAP1 MicroWire"
106 depends on SPI_MASTER && ARCH_OMAP1
109 This hooks up to the MicroWire controller on OMAP1 chips.
112 bool "McSPI driver for OMAP24xx"
113 depends on SPI_MASTER && ARCH_OMAP24XX
115 SPI master controller for OMAP24xx McSPI modules.
118 tristate "PXA2xx SSP SPI master"
119 depends on SPI_MASTER && ARCH_PXA && EXPERIMENTAL
121 This enables using a PXA2xx SSP port as a SPI master controller.
122 The driver can be configured to use any SSP port and additional
123 documentation can be found a Documentation/spi/pxa2xx.
126 tristate "Samsung S3C24XX series SPI"
127 depends on SPI_MASTER && ARCH_S3C2410 && EXPERIMENTAL
129 SPI driver for Samsung S3C24XX series ARM SoCs
131 config SPI_S3C24XX_GPIO
132 tristate "Samsung S3C24XX series SPI by GPIO"
133 depends on SPI_MASTER && ARCH_S3C2410 && SPI_BITBANG && EXPERIMENTAL
135 SPI driver for Samsung S3C24XX series ARM SoCs using
136 GPIO lines to provide the SPI bus. This can be used where
137 the inbuilt hardware cannot provide the transfer mode, or
138 where the board is using non hardware connected pins.
140 # Add new SPI master controllers in alphabetical order above this line
144 # There are lots of SPI device types, with sensors and memory
145 # being probably the most widely used ones.
147 comment "SPI Protocol Masters"
148 depends on SPI_MASTER
151 tristate "SPI EEPROMs from most vendors"
152 depends on SPI_MASTER && SYSFS
154 Enable this driver to get read/write support to most SPI EEPROMs,
155 after you configure the board init code to know about each eeprom
156 on your target board.
158 This driver can also be built as a module. If so, the module
162 # Add new SPI protocol masters in alphabetical order above this line
166 # (slave support would go here)
168 endmenu # "SPI support"