LXR linux/drivers/i2c/Kconfig

   1#
   2# I2C subsystem configuration
   3#
   4
   5menuconfig I2C
   6        tristate "I2C support"
   7        depends on HAS_IOMEM
   8        select RT_MUTEXES
   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
  25if I2C
  26
  27config I2C_BOARDINFO
  28        boolean
  29        default y
  30
  31config 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
  39config 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
  50config 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
  64config I2C_SMBUS
  65        tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO
  66        help
  67          Say Y here if you want support for SMBus extensions to the I2C
  68          specification. At the moment, the only supported extension is
  69          the SMBus alert protocol.
  70
  71          This support is also available as a module.  If so, the module
  72          will be called i2c-smbus.
  73
  74source drivers/i2c/algos/Kconfig
  75source drivers/i2c/busses/Kconfig
  76
  77config I2C_DEBUG_CORE
  78        bool "I2C Core debugging messages"
  79        help
  80          Say Y here if you want the I2C core to produce a bunch of debug
  81          messages to the system log.  Select this if you are having a
  82          problem with I2C support and want to see more of what is going on.
  83
  84config I2C_DEBUG_ALGO
  85        bool "I2C Algorithm debugging messages"
  86        help
  87          Say Y here if you want the I2C algorithm drivers to produce a bunch
  88          of debug messages to the system log.  Select this if you are having
  89          a problem with I2C support and want to see more of what is going
  90          on.
  91
  92config I2C_DEBUG_BUS
  93        bool "I2C Bus debugging messages"
  94        help
  95          Say Y here if you want the I2C bus drivers to produce a bunch of
  96          debug messages to the system log.  Select this if you are having
  97          a problem with I2C support and want to see more of what is going
  98          on.
  99
 100endif # I2C
 101