"Dummy" regulator possible?

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Hi,

Let's say I have a device that requires power from a regulator, like
OMAP3430 SDP Sharp LCD's "Vcc".

Then I have two boards with the same device. One board gives power to
the device from an always-on regulator, like SDP does with VBAT going to
the LCD. The other board gives power to the device from a controllable
regulator, say, VAUXy.

Is it possible to create a dummy regulator, so that the device driver
could always ask for Vcc supply, and get it, even when it's connected to
a always-on regulator?

Or what would be the correct approach to this?

 Tomi


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