i2c-mux-gpio: Update documentation
authorJean Delvare <khali@linux-fr.org>
Fri, 5 Oct 2012 20:23:54 +0000 (22:23 +0200)
committerJean Delvare <khali@endymion.delvare>
Fri, 5 Oct 2012 20:23:54 +0000 (22:23 +0200)
* Document the possibility to pass relative GPIO pin numbers.
* Document what platform device IDs to use, so that they do not
  collide.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Peter Korsgaard <peter.korsgaard@barco.com>

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