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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
Arthur Othienobe53f9b2006-08-13 23:39:11 +02002# I2C subsystem configuration
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#
4
Lan Tianyuda3c6642014-05-20 20:59:24 +08005menu "I2C support"
6
7config I2C
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 tristate "I2C support"
Mika Kuoppala194684e2009-12-06 17:06:22 +01009 select RT_MUTEXES
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 ---help---
Michael Witten622e0402011-07-08 22:33:24 +000011 I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 many micro controller applications and developed by Philips. SMBus,
13 or System Management Bus is a subset of the I2C protocol. More
14 information is contained in the directory <file:Documentation/i2c/>,
15 especially in the file called "summary" there.
16
17 Both I2C and SMBus are supported here. You will need this for
18 hardware sensors support, and also for Video For Linux support.
19
20 If you want I2C support, you should say Y here and also to the
21 specific driver for your bus adapter(s) below.
22
23 This I2C support can also be built as a module. If so, the module
24 will be called i2c-core.
25
Lan Tianyu36604752014-08-15 13:38:59 +080026config ACPI_I2C_OPREGION
27 bool "ACPI I2C Operation region support"
28 depends on I2C=y && ACPI
Lan Tianyuda3c6642014-05-20 20:59:24 +080029 default y
30 help
Lan Tianyu36604752014-08-15 13:38:59 +080031 Say Y here if you want to enable ACPI I2C operation region support.
32 Operation Regions allow firmware (BIOS) code to access I2C slave devices,
33 such as smart batteries through an I2C host controller driver.
Lan Tianyuda3c6642014-05-20 20:59:24 +080034
Jan Engelhardt16538e62007-05-01 23:26:34 +020035if I2C
36
David Brownell9c1600e2007-05-01 23:26:31 +020037config I2C_BOARDINFO
38 boolean
David Brownell9c1600e2007-05-01 23:26:31 +020039 default y
40
Jean Delvare2bb50952009-09-18 22:45:46 +020041config I2C_COMPAT
42 boolean "Enable compatibility bits for old user-space"
43 default y
44 help
45 Say Y here if you intend to run lm-sensors 3.1.1 or older, or any
46 other user-space package which expects i2c adapters to be class
47 devices. If you don't know, say Y.
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049config I2C_CHARDEV
50 tristate "I2C device interface"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 help
52 Say Y here to use i2c-* device files, usually found in the /dev
53 directory on your system. They make it possible to have user-space
54 programs use the I2C bus. Information on how to do this is
55 contained in the file <file:Documentation/i2c/dev-interface>.
56
57 This support is also available as a module. If so, the module
58 will be called i2c-dev.
59
Michael Lawnick08263742010-08-11 18:21:02 +020060config I2C_MUX
61 tristate "I2C bus multiplexing support"
Peter Huewe3ddb59d2012-10-05 22:23:52 +020062 depends on HAS_IOMEM
Michael Lawnick08263742010-08-11 18:21:02 +020063 help
64 Say Y here if you want the I2C core to support the ability to
65 handle multiplexed I2C bus topologies, by presenting each
66 multiplexed segment as a I2C adapter.
67
68 This support is also available as a module. If so, the module
69 will be called i2c-mux.
70
Michael Lawnick7f528132010-08-11 18:21:03 +020071source drivers/i2c/muxes/Kconfig
72
Jean Delvare8d24f8d2008-08-10 22:56:15 +020073config I2C_HELPER_AUTO
74 bool "Autoselect pertinent helper modules"
75 default y
76 help
77 Some I2C bus drivers require so-called "I2C algorithm" modules
78 to work. These are basically software-only abstractions of generic
79 I2C interfaces. This option will autoselect them so that you don't
80 have to care.
81
82 Unselect this only if you need to enable additional helper
83 modules, for example for use with external I2C bus drivers.
84
85 In doubt, say Y.
86
Jean Delvaree2ca3072010-03-02 12:23:43 +010087config I2C_SMBUS
Arnaud Lacombedfc518d2010-11-06 18:30:25 -030088 tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO
Jean Delvaree2ca3072010-03-02 12:23:43 +010089 help
90 Say Y here if you want support for SMBus extensions to the I2C
91 specification. At the moment, the only supported extension is
92 the SMBus alert protocol.
93
94 This support is also available as a module. If so, the module
95 will be called i2c-smbus.
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097source drivers/i2c/algos/Kconfig
98source drivers/i2c/busses/Kconfig
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Peter Huewe3ddb59d2012-10-05 22:23:52 +0200100config I2C_STUB
101 tristate "I2C/SMBus Test Stub"
Kees Cook417e86c2013-01-16 18:53:37 -0800102 depends on m
Peter Huewe3ddb59d2012-10-05 22:23:52 +0200103 default 'n'
104 help
105 This module may be useful to developers of SMBus client drivers,
106 especially for certain kinds of sensor chips.
107
108 If you do build this module, be sure to read the notes and warnings
109 in <file:Documentation/i2c/i2c-stub>.
110
111 If you don't know what to do here, definitely say N.
112
Wolfram Sang389be322014-11-18 17:04:54 +0100113config I2C_SLAVE
114 bool "I2C slave support"
115
116if I2C_SLAVE
117
118config I2C_SLAVE_EEPROM
119 tristate "I2C eeprom slave driver"
120
121endif
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123config I2C_DEBUG_CORE
124 bool "I2C Core debugging messages"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 help
126 Say Y here if you want the I2C core to produce a bunch of debug
127 messages to the system log. Select this if you are having a
128 problem with I2C support and want to see more of what is going on.
129
130config I2C_DEBUG_ALGO
131 bool "I2C Algorithm debugging messages"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 help
133 Say Y here if you want the I2C algorithm drivers to produce a bunch
134 of debug messages to the system log. Select this if you are having
135 a problem with I2C support and want to see more of what is going
136 on.
137
138config I2C_DEBUG_BUS
139 bool "I2C Bus debugging messages"
Peter Huewe3ddb59d2012-10-05 22:23:52 +0200140 depends on HAS_IOMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 help
142 Say Y here if you want the I2C bus drivers to produce a bunch of
143 debug messages to the system log. Select this if you are having
144 a problem with I2C support and want to see more of what is going
145 on.
146
Jan Engelhardt16538e62007-05-01 23:26:34 +0200147endif # I2C
Lan Tianyuda3c6642014-05-20 20:59:24 +0800148
149endmenu