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Linux/drivers/i2c/Kconfig

  1 #
  2 # I2C subsystem configuration
  3 #
  4 
  5 menuconfig I2C
  6         tristate "I2C support"
  7         select RT_MUTEXES
  8         ---help---
  9           I2C (pronounce: I-squared-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 
 24 if I2C
 25 
 26 config I2C_BOARDINFO
 27         boolean
 28         default y
 29 
 30 config I2C_COMPAT
 31         boolean "Enable compatibility bits for old user-space"
 32         default y
 33         help
 34           Say Y here if you intend to run lm-sensors 3.1.1 or older, or any
 35           other user-space package which expects i2c adapters to be class
 36           devices. If you don't know, say Y.
 37 
 38 config I2C_CHARDEV
 39         tristate "I2C device interface"
 40         help
 41           Say Y here to use i2c-* device files, usually found in the /dev
 42           directory on your system.  They make it possible to have user-space
 43           programs use the I2C bus.  Information on how to do this is
 44           contained in the file <file:Documentation/i2c/dev-interface>.
 45 
 46           This support is also available as a module.  If so, the module 
 47           will be called i2c-dev.
 48 
 49 config I2C_MUX
 50         tristate "I2C bus multiplexing support"
 51         depends on HAS_IOMEM
 52         help
 53           Say Y here if you want the I2C core to support the ability to
 54           handle multiplexed I2C bus topologies, by presenting each
 55           multiplexed segment as a I2C adapter.
 56 
 57           This support is also available as a module.  If so, the module
 58           will be called i2c-mux.
 59 
 60 source drivers/i2c/muxes/Kconfig
 61 
 62 config I2C_HELPER_AUTO
 63         bool "Autoselect pertinent helper modules"
 64         default y
 65         help
 66           Some I2C bus drivers require so-called "I2C algorithm" modules
 67           to work. These are basically software-only abstractions of generic
 68           I2C interfaces. This option will autoselect them so that you don't
 69           have to care.
 70 
 71           Unselect this only if you need to enable additional helper
 72           modules, for example for use with external I2C bus drivers.
 73 
 74           In doubt, say Y.
 75 
 76 config I2C_SMBUS
 77         tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO
 78         help
 79           Say Y here if you want support for SMBus extensions to the I2C
 80           specification. At the moment, the only supported extension is
 81           the SMBus alert protocol.
 82 
 83           This support is also available as a module.  If so, the module
 84           will be called i2c-smbus.
 85 
 86 source drivers/i2c/algos/Kconfig
 87 source drivers/i2c/busses/Kconfig
 88 
 89 config I2C_STUB
 90         tristate "I2C/SMBus Test Stub"
 91         depends on m
 92         default 'n'
 93         help
 94           This module may be useful to developers of SMBus client drivers,
 95           especially for certain kinds of sensor chips.
 96 
 97           If you do build this module, be sure to read the notes and warnings
 98           in <file:Documentation/i2c/i2c-stub>.
 99 
100           If you don't know what to do here, definitely say N.
101 
102 config I2C_DEBUG_CORE
103         bool "I2C Core debugging messages"
104         help
105           Say Y here if you want the I2C core to produce a bunch of debug
106           messages to the system log.  Select this if you are having a
107           problem with I2C support and want to see more of what is going on.
108 
109 config I2C_DEBUG_ALGO
110         bool "I2C Algorithm debugging messages"
111         help
112           Say Y here if you want the I2C algorithm drivers to produce a bunch
113           of debug messages to the system log.  Select this if you are having
114           a problem with I2C support and want to see more of what is going
115           on.
116 
117 config I2C_DEBUG_BUS
118         bool "I2C Bus debugging messages"
119         depends on HAS_IOMEM
120         help
121           Say Y here if you want the I2C bus drivers to produce a bunch of
122           debug messages to the system log.  Select this if you are having
123           a problem with I2C support and want to see more of what is going
124           on.
125 
126 endif # I2C

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