drivers/i2c/Kconfig

   1 #
   2 # I2C subsystem configuration
   3 #
   4
   5 menuconfig I2C
   6         tristate "I2C support"
   7         depends on HAS_IOMEM
   8         select RT_MUTEXES
   9         ---help---
  10           I2C (pronounce: I-squared-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
  25 if I2C
  26
  27 config I2C_BOARDINFO
  28         boolean
  29         default y
  30
  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
  39 config I2C_CHARDEV
  40         tristate "I2C device interface"
  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
  50 config I2C_MUX
  51         tristate "I2C bus multiplexing support"
  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_DEBUG_CORE
  90         bool "I2C Core debugging messages"
  91         help
  92           Say Y here if you want the I2C core to produce a bunch of debug
  93           messages to the system log.  Select this if you are having a
  94           problem with I2C support and want to see more of what is going on.
  95
  96 config I2C_DEBUG_ALGO
  97         bool "I2C Algorithm debugging messages"
  98         help
  99           Say Y here if you want the I2C algorithm drivers to produce a bunch
 100           of debug messages to the system log.  Select this if you are having
 101           a problem with I2C support and want to see more of what is going
 102           on.
 103
 104 config I2C_DEBUG_BUS
 105         bool "I2C Bus debugging messages"
 106         help
 107           Say Y here if you want the I2C bus drivers to produce a bunch of
 108           debug messages to the system log.  Select this if you are having
 109           a problem with I2C support and want to see more of what is going
 110           on.
 111
 112 endif # I2C