xref: /openbmc/linux/drivers/spi/Kconfig (revision c21b37f6)
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#
8menu "SPI support"
9	depends on HAS_IOMEM
10
11config SPI
12	bool "SPI support"
13	help
14	  The "Serial Peripheral Interface" is a low level synchronous
15	  protocol.  Chips that support SPI can have data transfer rates
16	  up to several tens of Mbit/sec.  Chips are addressed with a
17	  controller and a chipselect.  Most SPI slaves don't support
18	  dynamic device discovery; some are even write-only or read-only.
19
20	  SPI is widely used by microcontrollers to talk with sensors,
21	  eeprom and flash memory, codecs and various other controller
22	  chips, analog to digital (and d-to-a) converters, and more.
23	  MMC and SD cards can be accessed using SPI protocol; and for
24	  DataFlash cards used in MMC sockets, SPI must always be used.
25
26	  SPI is one of a family of similar protocols using a four wire
27	  interface (select, clock, data in, data out) including Microwire
28	  (half duplex), SSP, SSI, and PSP.  This driver framework should
29	  work with most such devices and controllers.
30
31config SPI_DEBUG
32	boolean "Debug support for SPI drivers"
33	depends on SPI && 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
52comment "SPI Master Controller Drivers"
53	depends on SPI_MASTER
54
55config SPI_ATMEL
56	tristate "Atmel SPI Controller"
57	depends on (ARCH_AT91 || AVR32) && SPI_MASTER
58	help
59	  This selects a driver for the Atmel SPI Controller, present on
60	  many AT32 (AVR32) and AT91 (ARM) chips.
61
62config SPI_BFIN
63	tristate "SPI controller driver for ADI Blackfin5xx"
64	depends on SPI_MASTER && BFIN
65	help
66	  This is the SPI controller master driver for Blackfin 5xx processor.
67
68config SPI_AU1550
69	tristate "Au1550/Au12x0 SPI Controller"
70	depends on SPI_MASTER && (SOC_AU1550 || SOC_AU1200) && EXPERIMENTAL
71	select SPI_BITBANG
72	help
73	  If you say yes to this option, support will be included for the
74	  Au1550 SPI controller (may also work with Au1200,Au1210,Au1250).
75
76	  This driver can also be built as a module.  If so, the module
77	  will be called au1550_spi.
78
79config SPI_BITBANG
80	tristate "Bitbanging SPI master"
81	depends on SPI_MASTER && EXPERIMENTAL
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 SPI_MASTER && PARPORT && EXPERIMENTAL
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 SPI_MASTER && 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 SPI_MASTER && 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 SPI_MASTER && 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 SPI controller"
128	depends on SPI_MASTER && PPC_83xx && EXPERIMENTAL
129	select SPI_BITBANG
130	help
131	  This enables using the Freescale MPC83xx SPI controller in master
132	  mode.
133
134	  Note, this driver uniquely supports the SPI controller on the MPC83xx
135	  family of PowerPC processors.  The MPC83xx uses a simple set of shift
136	  registers for data (opposed to the CPM based descriptor model).
137
138config SPI_OMAP_UWIRE
139	tristate "OMAP1 MicroWire"
140	depends on SPI_MASTER && 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"
147	depends on SPI_MASTER && ARCH_OMAP24XX
148	help
149	  SPI master controller for OMAP24xx Multichannel SPI
150	  (McSPI) modules.
151
152config SPI_PXA2XX
153	tristate "PXA2xx SSP SPI master"
154	depends on SPI_MASTER && ARCH_PXA && EXPERIMENTAL
155	help
156	  This enables using a PXA2xx SSP port as a SPI master controller.
157	  The driver can be configured to use any SSP port and additional
158	  documentation can be found a Documentation/spi/pxa2xx.
159
160config SPI_S3C24XX
161	tristate "Samsung S3C24XX series SPI"
162	depends on SPI_MASTER && ARCH_S3C2410 && EXPERIMENTAL
163	select SPI_BITBANG
164	help
165	  SPI driver for Samsung S3C24XX series ARM SoCs
166
167config SPI_S3C24XX_GPIO
168	tristate "Samsung S3C24XX series SPI by GPIO"
169	depends on SPI_MASTER && ARCH_S3C2410 && EXPERIMENTAL
170	select SPI_BITBANG
171	help
172	  SPI driver for Samsung S3C24XX series ARM SoCs using
173	  GPIO lines to provide the SPI bus. This can be used where
174	  the inbuilt hardware cannot provide the transfer mode, or
175	  where the board is using non hardware connected pins.
176
177config SPI_TXX9
178	tristate "Toshiba TXx9 SPI controller"
179	depends on SPI_MASTER && GENERIC_GPIO && CPU_TX49XX
180	help
181	  SPI driver for Toshiba TXx9 MIPS SoCs
182
183config SPI_XILINX
184	tristate "Xilinx SPI controller"
185	depends on SPI_MASTER && XILINX_VIRTEX && EXPERIMENTAL
186	select SPI_BITBANG
187	help
188	  This exposes the SPI controller IP from the Xilinx EDK.
189
190	  See the "OPB Serial Peripheral Interface (SPI) (v1.00e)"
191	  Product Specification document (DS464) for hardware details.
192
193#
194# Add new SPI master controllers in alphabetical order above this line
195#
196
197#
198# There are lots of SPI device types, with sensors and memory
199# being probably the most widely used ones.
200#
201comment "SPI Protocol Masters"
202	depends on SPI_MASTER
203
204config SPI_AT25
205	tristate "SPI EEPROMs from most vendors"
206	depends on SPI_MASTER && SYSFS
207	help
208	  Enable this driver to get read/write support to most SPI EEPROMs,
209	  after you configure the board init code to know about each eeprom
210	  on your target board.
211
212	  This driver can also be built as a module.  If so, the module
213	  will be called at25.
214
215config SPI_SPIDEV
216	tristate "User mode SPI device driver support"
217	depends on SPI_MASTER && EXPERIMENTAL
218	help
219	  This supports user mode SPI protocol drivers.
220
221	  Note that this application programming interface is EXPERIMENTAL
222	  and hence SUBJECT TO CHANGE WITHOUT NOTICE while it stabilizes.
223
224config SPI_TLE62X0
225	tristate "Infineon TLE62X0 (for power switching)"
226	depends on SPI_MASTER && SYSFS
227	help
228	  SPI driver for Infineon TLE62X0 series line driver chips,
229	  such as the TLE6220, TLE6230 and TLE6240.  This provides a
230	  sysfs interface, with each line presented as a kind of GPIO
231	  exposing both switch control and diagnostic feedback.
232
233#
234# Add new SPI protocol masters in alphabetical order above this line
235#
236
237# (slave support would go here)
238
239endmenu # "SPI support"
240
241