Kconfig revision 8ae12a0d85987dc138f8c944cb78a92bf466cea0 
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
10config SPI
11	bool "SPI support"
12	help
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.
18
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.
24
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.
29
30config SPI_DEBUG
31	boolean "Debug support for SPI drivers"
32	depends on SPI && DEBUG_KERNEL
33	help
34	  Say "yes" to enable debug messaging (like dev_dbg and pr_debug),
35	  sysfs, and debugfs support in SPI controller and protocol drivers.
36
37#
38# MASTER side ... talking to discrete SPI slave chips including microcontrollers
39#
40
41config SPI_MASTER
42#	boolean "SPI Master Support"
43	boolean
44	default SPI
45	help
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
49	  that are connected.
50
51comment "SPI Master Controller Drivers"
52	depends on SPI_MASTER
53
54
55#
56# Add new SPI master controllers in alphabetical order above this line
57#
58
59
60#
61# There are lots of SPI device types, with sensors and memory
62# being probably the most widely used ones.
63#
64comment "SPI Protocol Masters"
65	depends on SPI_MASTER
66
67
68#
69# Add new SPI protocol masters in alphabetical order above this line
70#
71
72
73# (slave support would go here)
74
75endmenu # "SPI support"
76
77