1# 2# SPI driver configuration 3# 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. 7# 8menuconfig SPI 9 bool "SPI support" 10 depends on HAS_IOMEM 11 help 12 The "Serial Peripheral Interface" is a low level synchronous 13 protocol. Chips that support SPI can have data transfer rates 14 up to several tens of Mbit/sec. Chips are addressed with a 15 controller and a chipselect. Most SPI slaves don't support 16 dynamic device discovery; some are even write-only or read-only. 17 18 SPI is widely used by microcontrollers to talk with sensors, 19 eeprom and flash memory, codecs and various other controller 20 chips, analog to digital (and d-to-a) converters, and more. 21 MMC and SD cards can be accessed using SPI protocol; and for 22 DataFlash cards used in MMC sockets, SPI must always be used. 23 24 SPI is one of a family of similar protocols using a four wire 25 interface (select, clock, data in, data out) including Microwire 26 (half duplex), SSP, SSI, and PSP. This driver framework should 27 work with most such devices and controllers. 28 29if SPI 30 31config SPI_DEBUG 32 boolean "Debug support for SPI drivers" 33 depends on DEBUG_KERNEL 34 help 35 Say "yes" to enable debug messaging (like dev_dbg and pr_debug), 36 sysfs, and debugfs support in SPI controller and protocol drivers. 37 38# 39# MASTER side ... talking to discrete SPI slave chips including microcontrollers 40# 41 42config SPI_MASTER 43# boolean "SPI Master Support" 44 boolean 45 default SPI 46 help 47 If your system has an master-capable SPI controller (which 48 provides the clock and chipselect), you can enable that 49 controller and the protocol drivers for the SPI slave chips 50 that are connected. 51 52if SPI_MASTER 53 54comment "SPI Master Controller Drivers" 55 56config SPI_ATMEL 57 tristate "Atmel SPI Controller" 58 depends on (ARCH_AT91 || AVR32) 59 help 60 This selects a driver for the Atmel SPI Controller, present on 61 many AT32 (AVR32) and AT91 (ARM) chips. 62 63config SPI_BFIN 64 tristate "SPI controller driver for ADI Blackfin5xx" 65 depends on BLACKFIN 66 help 67 This is the SPI controller master driver for Blackfin 5xx processor. 68 69config SPI_AU1550 70 tristate "Au1550/Au12x0 SPI Controller" 71 depends on (SOC_AU1550 || SOC_AU1200) && EXPERIMENTAL 72 select SPI_BITBANG 73 help 74 If you say yes to this option, support will be included for the 75 Au1550 SPI controller (may also work with Au1200,Au1210,Au1250). 76 77 This driver can also be built as a module. If so, the module 78 will be called au1550_spi. 79 80config SPI_BITBANG 81 tristate "Bitbanging SPI master" 82 help 83 With a few GPIO pins, your system can bitbang the SPI protocol. 84 Select this to get SPI support through I/O pins (GPIO, parallel 85 port, etc). Or, some systems' SPI master controller drivers use 86 this code to manage the per-word or per-transfer accesses to the 87 hardware shift registers. 88 89 This is library code, and is automatically selected by drivers that 90 need it. You only need to select this explicitly to support driver 91 modules that aren't part of this kernel tree. 92 93config SPI_BUTTERFLY 94 tristate "Parallel port adapter for AVR Butterfly (DEVELOPMENT)" 95 depends on PARPORT 96 select SPI_BITBANG 97 help 98 This uses a custom parallel port cable to connect to an AVR 99 Butterfly <http://www.atmel.com/products/avr/butterfly>, an 100 inexpensive battery powered microcontroller evaluation board. 101 This same cable can be used to flash new firmware. 102 103config SPI_IMX 104 tristate "Freescale iMX SPI controller" 105 depends on ARCH_IMX && EXPERIMENTAL 106 help 107 This enables using the Freescale iMX SPI controller in master 108 mode. 109 110config SPI_LM70_LLP 111 tristate "Parallel port adapter for LM70 eval board (DEVELOPMENT)" 112 depends on PARPORT && EXPERIMENTAL 113 select SPI_BITBANG 114 help 115 This driver supports the NS LM70 LLP Evaluation Board, 116 which interfaces to an LM70 temperature sensor using 117 a parallel port. 118 119config SPI_MPC52xx_PSC 120 tristate "Freescale MPC52xx PSC SPI controller" 121 depends on PPC_MPC52xx && EXPERIMENTAL 122 help 123 This enables using the Freescale MPC52xx Programmable Serial 124 Controller in master SPI mode. 125 126config SPI_MPC83xx 127 tristate "Freescale MPC83xx/QUICC Engine SPI controller" 128 depends on (PPC_83xx || QUICC_ENGINE) && EXPERIMENTAL 129 help 130 This enables using the Freescale MPC83xx and QUICC Engine SPI 131 controllers in master mode. 132 133 Note, this driver uniquely supports the SPI controller on the MPC83xx 134 family of PowerPC processors, plus processors with QUICC Engine 135 technology. This driver uses a simple set of shift registers for data 136 (opposed to the CPM based descriptor model). 137 138config SPI_OMAP_UWIRE 139 tristate "OMAP1 MicroWire" 140 depends on ARCH_OMAP1 141 select SPI_BITBANG 142 help 143 This hooks up to the MicroWire controller on OMAP1 chips. 144 145config SPI_OMAP24XX 146 tristate "McSPI driver for OMAP24xx/OMAP34xx" 147 depends on ARCH_OMAP24XX || ARCH_OMAP34XX 148 help 149 SPI master controller for OMAP24xx/OMAP34xx Multichannel SPI 150 (McSPI) modules. 151 152config SPI_PXA2XX 153 tristate "PXA2xx SSP SPI master" 154 depends on ARCH_PXA && EXPERIMENTAL 155 select PXA_SSP 156 help 157 This enables using a PXA2xx SSP port as a SPI master controller. 158 The driver can be configured to use any SSP port and additional 159 documentation can be found a Documentation/spi/pxa2xx. 160 161config SPI_S3C24XX 162 tristate "Samsung S3C24XX series SPI" 163 depends on ARCH_S3C2410 && EXPERIMENTAL 164 select SPI_BITBANG 165 help 166 SPI driver for Samsung S3C24XX series ARM SoCs 167 168config SPI_S3C24XX_GPIO 169 tristate "Samsung S3C24XX series SPI by GPIO" 170 depends on ARCH_S3C2410 && EXPERIMENTAL 171 select SPI_BITBANG 172 help 173 SPI driver for Samsung S3C24XX series ARM SoCs using 174 GPIO lines to provide the SPI bus. This can be used where 175 the inbuilt hardware cannot provide the transfer mode, or 176 where the board is using non hardware connected pins. 177 178config SPI_SH_SCI 179 tristate "SuperH SCI SPI controller" 180 depends on SUPERH 181 select SPI_BITBANG 182 help 183 SPI driver for SuperH SCI blocks. 184 185config SPI_TXX9 186 tristate "Toshiba TXx9 SPI controller" 187 depends on GENERIC_GPIO && CPU_TX49XX 188 help 189 SPI driver for Toshiba TXx9 MIPS SoCs 190 191config SPI_XILINX 192 tristate "Xilinx SPI controller" 193 depends on XILINX_VIRTEX && EXPERIMENTAL 194 select SPI_BITBANG 195 help 196 This exposes the SPI controller IP from the Xilinx EDK. 197 198 See the "OPB Serial Peripheral Interface (SPI) (v1.00e)" 199 Product Specification document (DS464) for hardware details. 200 201# 202# Add new SPI master controllers in alphabetical order above this line 203# 204 205# 206# There are lots of SPI device types, with sensors and memory 207# being probably the most widely used ones. 208# 209comment "SPI Protocol Masters" 210 211config SPI_AT25 212 tristate "SPI EEPROMs from most vendors" 213 depends on SYSFS 214 help 215 Enable this driver to get read/write support to most SPI EEPROMs, 216 after you configure the board init code to know about each eeprom 217 on your target board. 218 219 This driver can also be built as a module. If so, the module 220 will be called at25. 221 222config SPI_SPIDEV 223 tristate "User mode SPI device driver support" 224 depends on EXPERIMENTAL 225 help 226 This supports user mode SPI protocol drivers. 227 228 Note that this application programming interface is EXPERIMENTAL 229 and hence SUBJECT TO CHANGE WITHOUT NOTICE while it stabilizes. 230 231config SPI_TLE62X0 232 tristate "Infineon TLE62X0 (for power switching)" 233 depends on SYSFS 234 help 235 SPI driver for Infineon TLE62X0 series line driver chips, 236 such as the TLE6220, TLE6230 and TLE6240. This provides a 237 sysfs interface, with each line presented as a kind of GPIO 238 exposing both switch control and diagnostic feedback. 239 240# 241# Add new SPI protocol masters in alphabetical order above this line 242# 243 244endif # SPI_MASTER 245 246# (slave support would go here) 247 248endif # SPI 249