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authorPeter Korsgaard <peter.korsgaard@barco.com>2011-01-10 16:11:23 -0500
committerJean Delvare <khali@endymion.delvare>2011-01-10 16:11:23 -0500
commit92ed1a76ca31774eb27de14b2215841367c68056 (patch)
treef9becefa5dbcdaa8cfd65100e1735044cd3910d6 /Documentation/networking/smctr.txt
parentb18a5c80eb2e7e9c72d23f1960b09d78ddf7e5b0 (diff)
i2c: Add generic I2C multiplexer using GPIO API
Add an i2c mux driver providing access to i2c bus segments using a hardware MUX sitting on a master bus and controlled through gpio pins. E.G. something like: ---------- ---------- Bus segment 1 - - - - - | | SCL/SDA | |-------------- | | | |------------| | | | | | Bus segment 2 | | | Linux | GPIO 1..N | MUX |--------------- Devices | |------------| | | | | | | | Bus segment M | | | |---------------| | ---------- ---------- - - - - - SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M according to the settings of the GPIO pins 1..N. Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
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