drivers/i2c/Kconfig

   1 #
   2 # I2C subsystem configuration
   3 #
   4
   5 menu "I2C support"
   6
   7 config I2C
   8         tristate "I2C support"
   9         select RT_MUTEXES
  10         select IRQ_DOMAIN
  11         ---help---
  12           I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
  13           many micro controller applications and developed by Philips.  SMBus,
  14           or System Management Bus is a subset of the I2C protocol.  More
  15           information is contained in the directory <file:Documentation/i2c/>,
  16           especially in the file called "summary" there.
  17
  18           Both I2C and SMBus are supported here. You will need this for
  19           hardware sensors support, and also for Video For Linux support.
  20
  21           If you want I2C support, you should say Y here and also to the
  22           specific driver for your bus adapter(s) below.
  23
  24           This I2C support can also be built as a module.  If so, the module
  25           will be called i2c-core.
  26
  27 config ACPI_I2C_OPREGION
  28         bool "ACPI I2C Operation region support"
  29         depends on I2C=y && ACPI
  30         default y
  31         help
  32           Say Y here if you want to enable ACPI I2C operation region support.
  33           Operation Regions allow firmware (BIOS) code to access I2C slave devices,
  34           such as smart batteries through an I2C host controller driver.
  35
  36 if I2C
  37
  38 config I2C_BOARDINFO
  39         bool
  40         default y
  41
  42 config I2C_COMPAT
  43         bool "Enable compatibility bits for old user-space"
  44         default y
  45         help
  46           Say Y here if you intend to run lm-sensors 3.1.1 or older, or any
  47           other user-space package which expects i2c adapters to be class
  48           devices. If you don't know, say Y.
  49
  50 config I2C_CHARDEV
  51         tristate "I2C device interface"
  52         help
  53           Say Y here to use i2c-* device files, usually found in the /dev
  54           directory on your system.  They make it possible to have user-space
  55           programs use the I2C bus.  Information on how to do this is
  56           contained in the file <file:Documentation/i2c/dev-interface>.
  57
  58           This support is also available as a module.  If so, the module
  59           will be called i2c-dev.
  60
  61 config I2C_MUX
  62         tristate "I2C bus multiplexing support"
  63         help
  64           Say Y here if you want the I2C core to support the ability to
  65           handle multiplexed I2C bus topologies, by presenting each
  66           multiplexed segment as a I2C adapter.
  67
  68           This support is also available as a module.  If so, the module
  69           will be called i2c-mux.
  70
  71 source drivers/i2c/muxes/Kconfig
  72
  73 config I2C_HELPER_AUTO
  74         bool "Autoselect pertinent helper modules"
  75         default y
  76         help
  77           Some I2C bus drivers require so-called "I2C algorithm" modules
  78           to work. These are basically software-only abstractions of generic
  79           I2C interfaces. This option will autoselect them so that you don't
  80           have to care.
  81
  82           Unselect this only if you need to enable additional helper
  83           modules, for example for use with external I2C bus drivers.
  84
  85           In doubt, say Y.
  86
  87 config I2C_SMBUS
  88         tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO
  89         help
  90           Say Y here if you want support for SMBus extensions to the I2C
  91           specification. At the moment, two extensions are supported:
  92           the SMBus Alert protocol and the SMBus Host Notify protocol.
  93
  94           This support is also available as a module.  If so, the module
  95           will be called i2c-smbus.
  96
  97 source drivers/i2c/algos/Kconfig
  98 source drivers/i2c/busses/Kconfig
  99
 100 config I2C_STUB
 101         tristate "I2C/SMBus Test Stub"
 102         depends on m
 103         default 'n'
 104         help
 105           This module may be useful to developers of SMBus client drivers,
 106           especially for certain kinds of sensor chips.
 107
 108           If you do build this module, be sure to read the notes and warnings
 109           in <file:Documentation/i2c/i2c-stub>.
 110
 111           If you don't know what to do here, definitely say N.
 112
 113 config I2C_SLAVE
 114         bool "I2C slave support"
 115
 116 if I2C_SLAVE
 117
 118 config I2C_SLAVE_EEPROM
 119         tristate "I2C eeprom slave driver"
 120
 121 endif
 122
 123 config I2C_DEBUG_CORE
 124         bool "I2C Core debugging messages"
 125         help
 126           Say Y here if you want the I2C core to produce a bunch of debug
 127           messages to the system log.  Select this if you are having a
 128           problem with I2C support and want to see more of what is going on.
 129
 130 config I2C_DEBUG_ALGO
 131         bool "I2C Algorithm debugging messages"
 132         help
 133           Say Y here if you want the I2C algorithm drivers to produce a bunch
 134           of debug messages to the system log.  Select this if you are having
 135           a problem with I2C support and want to see more of what is going
 136           on.
 137
 138 config I2C_DEBUG_BUS
 139         bool "I2C Bus debugging messages"
 140         depends on HAS_IOMEM
 141         help
 142           Say Y here if you want the I2C bus drivers to produce a bunch of
 143           debug messages to the system log.  Select this if you are having
 144           a problem with I2C support and want to see more of what is going
 145           on.
 146
 147 endif # I2C
 148
 149 endmenu