[PATCH] backlight: lcd: add driver for raster-type lcd's with gpio controlled panel reset

On Wed, Jan 11, 2012 at 04:21:57PM +0530, Thomas Abraham wrote:

In the case of Exynos4 based Origen board, buck7 of max8997 supplies
power to the lcd panel. buck7 is capable of supplying power at
different voltage levels but for Origen board, it is required to
supply only 3.3V. The constraints for buck7 can specify 'apply_uV' and
this will ensure that buck7 is configured to supply 3.3V.

But 'apply_uV' seems to be not ideal for regulators that supply power
to lcd panels. It would be better to power lcd panels only when video
data has to be displayed.

What makes you say this?  Enabling and disabling a regulator are
entirely orthogonal to setting the regulator voltage.