MFD: ucb1x00-core: add missing ucb1x00_enable()/ucb1x00_disable()
authorRussell King <rmk+kernel@arm.linux.org.uk>
Sat, 21 Jan 2012 18:13:20 +0000 (18:13 +0000)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Sat, 18 Feb 2012 23:15:38 +0000 (23:15 +0000)
commited442b6798eb39eda3bcea92ef9403280b603818
tree4e9d701e751169e5eda8ef7ee985c29b55f16d9e
parent65b539bb900f64b9a3f9b761bf0f735dc84e6b70
MFD: ucb1x00-core: add missing ucb1x00_enable()/ucb1x00_disable()

ucb1x00_enable() and ucb1x00_disable() are used for power saving on the
SIB interface, allowing the host supplied clock to be disabled when not
required.  We require drivers which access the ucb1x00 to ensure that
they have enabled the clock prior to accessing the device, and they
should disable it once they're done.

As we don't expect gpiolib users to be aware of this detail, we must
make these calls in the gpiolib interfaces.  Add them.

Also add them to the resume method, which needs to re-establish the
GPIO pin settings.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
drivers/mfd/ucb1x00-core.c