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

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