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