of: i2c: add support for wakeup-source property
authorOlof Johansson <olof@lixom.net>
Sat, 21 Jul 2012 18:47:25 +0000 (11:47 -0700)
committerRob Herring <rob.herring@calxeda.com>
Fri, 7 Sep 2012 20:30:14 +0000 (15:30 -0500)
commitee67016fcc58998c44a9c99b0721568b3d2edc6e
treec83da0436322788f81d8b8fb20ceebed876836be
parente38c0a1fbc5803cbacdaac0557c70ac8ca5152e7
of: i2c: add support for wakeup-source property

Add support for specifying a generic "wakeup-source" property on i2c
clients, which will set the I2C_CLIENT_WAKE flag, thus configuring the
device to wake the system from suspend (via IRQ).

This obviously doesn't make sense on devices lacking IRQ, but since we
still allow that in the i2c_board_info case, I don't see a reason to
restrict it here.

Note: Since the generic i2c bindings aren't documented in the kernel,
I didn't find a good place to add documentation for this binding
extension. I still think it makes sense to have a generic property
instead of having each device do its own binding for the same.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
drivers/of/of_i2c.c