i2c-mux: Add support for device auto-detection
authorJean Delvare <khali@linux-fr.org>
Fri, 5 Oct 2012 20:23:51 +0000 (22:23 +0200)
committerJean Delvare <khali@endymion.delvare>
Fri, 5 Oct 2012 20:23:51 +0000 (22:23 +0200)
commiteee543e8248150e8fb833943c71f40c7b1724600
tree56efec8384b2bca4cf926583b52a7cf6136fa76f
parent5f3d2f2e1a63679cf1c4a4210f2f1cc2f335bef6
i2c-mux: Add support for device auto-detection

Let I2C bus segments behind multiplexers have a class. This allows for
device auto-detection on these segments. As long as parent segments
don't share the same class, it should be fine.

I implemented support in drivers i2c-mux-gpio and i2c-mux-pca954x. I
left i2c-mux-pca9541 and i2c-mux-pinctrl alone for the moment as I
don't know if this feature makes sense for the use cases of these
drivers.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Peter Korsgaard <peter.korsgaard@barco.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Michael Lawnick <ml.lawnick@gmx.de>
Cc: Rodolfo Giometti <giometti@linux.it>
drivers/i2c/i2c-mux.c
drivers/i2c/muxes/i2c-mux-gpio.c
drivers/i2c/muxes/i2c-mux-pca9541.c
drivers/i2c/muxes/i2c-mux-pca954x.c
drivers/i2c/muxes/i2c-mux-pinctrl.c
include/linux/i2c-mux-gpio.h
include/linux/i2c-mux.h
include/linux/i2c/pca954x.h