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1da177e4 | 1 | # |
be53f9b2 | 2 | # I2C subsystem configuration |
1da177e4 LT |
3 | # |
4 | ||
16538e6b | 5 | menuconfig I2C |
1da177e4 | 6 | tristate "I2C support" |
e25df120 | 7 | depends on HAS_IOMEM |
194684e5 | 8 | select RT_MUTEXES |
1da177e4 LT |
9 | ---help--- |
10 | I2C (pronounce: I-square-C) is a slow serial bus protocol used in | |
11 | many micro controller applications and developed by Philips. SMBus, | |
12 | or System Management Bus is a subset of the I2C protocol. More | |
13 | information is contained in the directory <file:Documentation/i2c/>, | |
14 | especially in the file called "summary" there. | |
15 | ||
16 | Both I2C and SMBus are supported here. You will need this for | |
17 | hardware sensors support, and also for Video For Linux support. | |
18 | ||
19 | If you want I2C support, you should say Y here and also to the | |
20 | specific driver for your bus adapter(s) below. | |
21 | ||
22 | This I2C support can also be built as a module. If so, the module | |
23 | will be called i2c-core. | |
24 | ||
16538e6b JE |
25 | if I2C |
26 | ||
9c1600ed DB |
27 | config I2C_BOARDINFO |
28 | boolean | |
9c1600ed DB |
29 | default y |
30 | ||
2bb5095a JD |
31 | config I2C_COMPAT |
32 | boolean "Enable compatibility bits for old user-space" | |
33 | default y | |
34 | help | |
35 | Say Y here if you intend to run lm-sensors 3.1.1 or older, or any | |
36 | other user-space package which expects i2c adapters to be class | |
37 | devices. If you don't know, say Y. | |
38 | ||
1da177e4 LT |
39 | config I2C_CHARDEV |
40 | tristate "I2C device interface" | |
1da177e4 LT |
41 | help |
42 | Say Y here to use i2c-* device files, usually found in the /dev | |
43 | directory on your system. They make it possible to have user-space | |
44 | programs use the I2C bus. Information on how to do this is | |
45 | contained in the file <file:Documentation/i2c/dev-interface>. | |
46 | ||
47 | This support is also available as a module. If so, the module | |
48 | will be called i2c-dev. | |
49 | ||
8d24f8dc JD |
50 | config I2C_HELPER_AUTO |
51 | bool "Autoselect pertinent helper modules" | |
52 | default y | |
53 | help | |
54 | Some I2C bus drivers require so-called "I2C algorithm" modules | |
55 | to work. These are basically software-only abstractions of generic | |
56 | I2C interfaces. This option will autoselect them so that you don't | |
57 | have to care. | |
58 | ||
59 | Unselect this only if you need to enable additional helper | |
60 | modules, for example for use with external I2C bus drivers. | |
61 | ||
62 | In doubt, say Y. | |
63 | ||
1da177e4 LT |
64 | source drivers/i2c/algos/Kconfig |
65 | source drivers/i2c/busses/Kconfig | |
66 | source drivers/i2c/chips/Kconfig | |
67 | ||
68 | config I2C_DEBUG_CORE | |
69 | bool "I2C Core debugging messages" | |
1da177e4 LT |
70 | help |
71 | Say Y here if you want the I2C core to produce a bunch of debug | |
72 | messages to the system log. Select this if you are having a | |
73 | problem with I2C support and want to see more of what is going on. | |
74 | ||
75 | config I2C_DEBUG_ALGO | |
76 | bool "I2C Algorithm debugging messages" | |
1da177e4 LT |
77 | help |
78 | Say Y here if you want the I2C algorithm drivers to produce a bunch | |
79 | of debug messages to the system log. Select this if you are having | |
80 | a problem with I2C support and want to see more of what is going | |
81 | on. | |
82 | ||
83 | config I2C_DEBUG_BUS | |
84 | bool "I2C Bus debugging messages" | |
1da177e4 LT |
85 | help |
86 | Say Y here if you want the I2C bus drivers to produce a bunch of | |
87 | debug messages to the system log. Select this if you are having | |
88 | a problem with I2C support and want to see more of what is going | |
89 | on. | |
90 | ||
91 | config I2C_DEBUG_CHIP | |
92 | bool "I2C Chip debugging messages" | |
1da177e4 LT |
93 | help |
94 | Say Y here if you want the I2C chip drivers to produce a bunch of | |
95 | debug messages to the system log. Select this if you are having | |
96 | a problem with I2C support and want to see more of what is going | |
97 | on. | |
98 | ||
16538e6b | 99 | endif # I2C |