forked from luck/tmp_suning_uos_patched
951eef3955
We got multiple patches to add mux support to device tree, so people are using it happily already and build up on it. I also used it in a project without encountering problems. 20 months of EXPERIMENTAL should do for this. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Jean Delvare <khali@linux-fr.org> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Michael Lawnick <ml.lawnick@gmx.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: David Daney <ddaney.cavm@gmail.com>
113 lines
3.5 KiB
Plaintext
113 lines
3.5 KiB
Plaintext
#
|
|
# I2C subsystem configuration
|
|
#
|
|
|
|
menuconfig I2C
|
|
tristate "I2C support"
|
|
depends on HAS_IOMEM
|
|
select RT_MUTEXES
|
|
---help---
|
|
I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
|
|
many micro controller applications and developed by Philips. SMBus,
|
|
or System Management Bus is a subset of the I2C protocol. More
|
|
information is contained in the directory <file:Documentation/i2c/>,
|
|
especially in the file called "summary" there.
|
|
|
|
Both I2C and SMBus are supported here. You will need this for
|
|
hardware sensors support, and also for Video For Linux support.
|
|
|
|
If you want I2C support, you should say Y here and also to the
|
|
specific driver for your bus adapter(s) below.
|
|
|
|
This I2C support can also be built as a module. If so, the module
|
|
will be called i2c-core.
|
|
|
|
if I2C
|
|
|
|
config I2C_BOARDINFO
|
|
boolean
|
|
default y
|
|
|
|
config I2C_COMPAT
|
|
boolean "Enable compatibility bits for old user-space"
|
|
default y
|
|
help
|
|
Say Y here if you intend to run lm-sensors 3.1.1 or older, or any
|
|
other user-space package which expects i2c adapters to be class
|
|
devices. If you don't know, say Y.
|
|
|
|
config I2C_CHARDEV
|
|
tristate "I2C device interface"
|
|
help
|
|
Say Y here to use i2c-* device files, usually found in the /dev
|
|
directory on your system. They make it possible to have user-space
|
|
programs use the I2C bus. Information on how to do this is
|
|
contained in the file <file:Documentation/i2c/dev-interface>.
|
|
|
|
This support is also available as a module. If so, the module
|
|
will be called i2c-dev.
|
|
|
|
config I2C_MUX
|
|
tristate "I2C bus multiplexing support"
|
|
help
|
|
Say Y here if you want the I2C core to support the ability to
|
|
handle multiplexed I2C bus topologies, by presenting each
|
|
multiplexed segment as a I2C adapter.
|
|
|
|
This support is also available as a module. If so, the module
|
|
will be called i2c-mux.
|
|
|
|
source drivers/i2c/muxes/Kconfig
|
|
|
|
config I2C_HELPER_AUTO
|
|
bool "Autoselect pertinent helper modules"
|
|
default y
|
|
help
|
|
Some I2C bus drivers require so-called "I2C algorithm" modules
|
|
to work. These are basically software-only abstractions of generic
|
|
I2C interfaces. This option will autoselect them so that you don't
|
|
have to care.
|
|
|
|
Unselect this only if you need to enable additional helper
|
|
modules, for example for use with external I2C bus drivers.
|
|
|
|
In doubt, say Y.
|
|
|
|
config I2C_SMBUS
|
|
tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO
|
|
help
|
|
Say Y here if you want support for SMBus extensions to the I2C
|
|
specification. At the moment, the only supported extension is
|
|
the SMBus alert protocol.
|
|
|
|
This support is also available as a module. If so, the module
|
|
will be called i2c-smbus.
|
|
|
|
source drivers/i2c/algos/Kconfig
|
|
source drivers/i2c/busses/Kconfig
|
|
|
|
config I2C_DEBUG_CORE
|
|
bool "I2C Core debugging messages"
|
|
help
|
|
Say Y here if you want the I2C core to produce a bunch of debug
|
|
messages to the system log. Select this if you are having a
|
|
problem with I2C support and want to see more of what is going on.
|
|
|
|
config I2C_DEBUG_ALGO
|
|
bool "I2C Algorithm debugging messages"
|
|
help
|
|
Say Y here if you want the I2C algorithm drivers to produce a bunch
|
|
of debug messages to the system log. Select this if you are having
|
|
a problem with I2C support and want to see more of what is going
|
|
on.
|
|
|
|
config I2C_DEBUG_BUS
|
|
bool "I2C Bus debugging messages"
|
|
help
|
|
Say Y here if you want the I2C bus drivers to produce a bunch of
|
|
debug messages to the system log. Select this if you are having
|
|
a problem with I2C support and want to see more of what is going
|
|
on.
|
|
|
|
endif # I2C
|