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| author | Peter Korsgaard <peter.korsgaard@barco.com> | 2011-01-10 22:11:23 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2011-01-10 22:11:23 +0100 |
| commit | 92ed1a76ca31774eb27de14b2215841367c68056 (patch) | |
| tree | f9becefa5dbcdaa8cfd65100e1735044cd3910d6 /drivers/i2c/muxes/Kconfig | |
| parent | i2c-nforce2: Remove unnecessary cast of pci_get_drvdata (diff) | |
| download | linux-92ed1a76ca31774eb27de14b2215841367c68056.tar.xz linux-92ed1a76ca31774eb27de14b2215841367c68056.zip | |
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>
Diffstat (limited to 'drivers/i2c/muxes/Kconfig')
| -rw-r--r-- | drivers/i2c/muxes/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/i2c/muxes/Kconfig b/drivers/i2c/muxes/Kconfig index 4d91d80bfd23..90b7a0163899 100644 --- a/drivers/i2c/muxes/Kconfig +++ b/drivers/i2c/muxes/Kconfig @@ -5,6 +5,18 @@ menu "Multiplexer I2C Chip support" depends on I2C_MUX +config I2C_MUX_GPIO + tristate "GPIO-based I2C multiplexer" + depends on GENERIC_GPIO + help + If you say yes to this option, support will be included for a + GPIO based I2C multiplexer. This driver provides access to + I2C busses connected through a MUX, which is controlled + through GPIO pins. + + This driver can also be built as a module. If so, the module + will be called gpio-i2cmux. + config I2C_MUX_PCA9541 tristate "NXP PCA9541 I2C Master Selector" depends on EXPERIMENTAL |